- 23 Jan, 2015 1 commit
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J. Bruce Fields authored
Someone with a weird time_t happened to notice this, it shouldn't really manifest till 2038. It may not be our ownly year-2038 problem. Reported-by: Aaron Pace <Aaron.Pace@alcatel-lucent.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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- 15 Jan, 2015 12 commits
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Chuck Lever authored
Most NFS RPCs place their large payload argument at the end of the RPC header (eg, NFSv3 WRITE). For NFSv3 WRITE and SYMLINK, RPC/RDMA sends the complete RPC header inline, and the payload argument in the read list. Data in the read list is the last part of the XDR stream. One important case is not like this, however. NFSv4 COMPOUND is a counted array of operations. A WRITE operation, with its large data payload, can appear in the middle of the compound's operations array. Thus NFSv4 WRITE compounds can have header content after the WRITE payload. The Linux client, for example, performs an NFSv4 WRITE like this: { PUTFH, WRITE, GETATTR } Though RFC 5667 is not precise about this, the proper way to convey this compound is to place the GETATTR inline, _after_ the front of the RPC header. The receiver inserts the read list payload into the XDR stream after the initial WRITE arguments, and before the GETATTR operation, thanks to the value of the read list "position" field. The Linux client currently sends the GETATTR at the end of the RPC/RDMA read list, which is incorrect. It will be corrected in the future. The Linux server currently rejects NFSv4 compounds with inline content after the read list. For the above NFSv4 WRITE compound, the NFS compound header indicates there are three operations, but the server finds nonsense when it looks in the XDR stream for the third operation, and the compound fails with OP_ILLEGAL. Move trailing inline content to the end of the XDR buffer's page list. This presents incoming NFSv4 WRITE compounds to NFSD in the same way the socket transport does. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
This is a pre-requisite for a subsequent patch. Read list XDR round-up needs to be done _before_ additional inline content is copied to the end of the XDR buffer's page list. Move the logic added by commit e560e3b5 ("svcrdma: Add zero padding if the client doesn't send it"). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
Currently the Linux server can not decode RDMA_NOMSG type requests. Operations whose length exceeds the fixed size of RDMA SEND buffers, like large NFSv4 CREATE(NF4LNK) operations, must be conveyed via RDMA_NOMSG. For an RDMA_MSG type request, the client sends the RPC/RDMA, RPC headers, and some or all of the NFS arguments via RDMA SEND. For an RDMA_NOMSG type request, the client sends just the RPC/RDMA header via RDMA SEND. The request's read list contains elements for the entire RPC message, including the RPC header. NFSD expects the RPC/RMDA header and RPC header to be contiguous in page zero of the XDR buffer. Add logic in the RDMA READ path to make the read list contents land where the server prefers, when the incoming message is a type RDMA_NOMSG message. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
An RPC/RDMA client may send large RPC arguments via a read list. This is a list of scatter/gather elements which convey RPC call arguments too large to fit in a small RDMA SEND. Each entry in the read list has a "position" field, whose value is the byte offset in the XDR stream where the data in that entry is to be inserted. Entries which share the same "position" value make up the same RPC argument. The receiver inserts entries with the same position field value in list order into the XDR stream. Currently the Linux NFS/RDMA server cannot handle receiving read chunks in more than one position, mostly because no current client sends read lists with elements in more than one position. As a sanity check, ensure that all received chunks have the same "rc_position." Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
The RDMA reader function doesn't change once an svcxprt_rdma is instantiated. Instead of checking sc_devcap during every incoming RPC, set the reader function once when the connection is accepted. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
xdr_start() can return the wrong rmsgp address if an assumption about how the xdr_buf was constructed changes. When it gets it wrong, the client receives a reply that has gibberish in the RPC/RDMA header, preventing it from matching a waiting RPC request. Instead, make (and document) just one assumption: that the RDMA header for the client's RPC call is at the start of the first page in rq_pages. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
Current convention is to avoid using BUG_ON() in places where an oops could cause complete system failure. Replace BUG_ON() call sites in svcrdma with an assertion error message and allow execution to continue safely. Some BUG_ON() calls are removed because they have never fired in production (that we are aware of). Some WARN_ON() calls are also replaced where a back trace is not helpful; e.g., in a workqueue task. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
The byte_count argument is not used, and the function is called only from one place. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
Nit: remove an unused variable to squelch a compiler warning. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
Nit: Fix inconsistent white space in dprintk messages. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Rickard Strandqvist authored
Remove the function renew_client() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Rickard Strandqvist authored
Remove the function nlm_encode_fh() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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- 07 Jan, 2015 4 commits
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J. Bruce Fields authored
RFC 3530 14.2.24 says This value represents the length of the names of the directory entries and the cookie value for these entries. This length represents the XDR encoding of the data (names and cookies)... The "xdr encoding" of the name should probably include the 4 bytes for the length. But this is all just a hint so not worth e.g. backporting to stable. Also reshuffle some lines to more clearly group together the dircount-related code. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Jeff Layton authored
fi_delegees is always handled under the fi_lock, so there's no need to use an atomic_t for this field. Signed-off-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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J. Bruce Fields authored
A struct xdr_stream at a page boundary might point to the end of one page or the beginning of the next, but xdr_truncate_encode isn't prepared to handle the former. This can cause corruption of NFSv4 READDIR replies in the case that a readdir entry that would have exceeded the client's dircount/maxcount limit would have ended exactly on a 4k page boundary. You're more likely to hit this case on large directories. Other xdr_truncate_encode callers are probably also affected. Reported-by: Holger Hoffstätte <holger.hoffstaette@googlemail.com> Tested-by: Holger Hoffstätte <holger.hoffstaette@googlemail.com> Fixes: 3e19ce76 "rpc: xdr_truncate_encode" Cc: stable@vger.kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Jeff Layton authored
Currently, nfs4_set_delegation takes a reference to an existing delegation and then checks to see if there is a conflict. If there is one, then it doesn't release that reference. Change the code to take the reference after the check and only if there is no conflict. Signed-off-by: Jeff Layton <jlayton@primarydata.com> Cc: stable@vger.kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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- 06 Jan, 2015 1 commit
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Linus Torvalds authored
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- 05 Jan, 2015 3 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: - Wire up sys_execveat(). Tested on 32 & 64 bit. - Fix for kdump on LE systems with cpus hot unplugged. - Revert Anton's fix for "kernel BUG at kernel/smpboot.c:134!", this broke other platforms, we'll do a proper fix for 3.20. * tag 'powerpc-3.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: Revert "powerpc: Secondary CPUs must set cpu_callin_map after setting active and online" powerpc/kdump: Ignore failure in enabling big endian exception during crash powerpc: Wire up sys_execveat() syscall
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git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linuxLinus Torvalds authored
Pull ia64 fixlet from Tony Luck: "Add execveat syscall" * tag 'please-pull-syscall' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux: [IA64] Enable execveat syscall for ia64
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Tony Luck authored
See commit 51f39a1f syscalls: implement execveat() system call Signed-off-by: Tony Luck <tony.luck@intel.com>
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- 04 Jan, 2015 4 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/rw/umlLinus Torvalds authored
Pull UML fixes from Richard Weinberger: "Two fixes for UML regressions. Nothing exciting" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: x86, um: actually mark system call tables readonly um: Skip futex_atomic_cmpxchg_inatomic() test
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Pavel Machek authored
Commit 9fc2105a ("ARM: 7830/1: delay: don't bother reporting bogomips in /proc/cpuinfo") breaks audio in python, and probably elsewhere, with message FATAL: cannot locate cpu MHz in /proc/cpuinfo I'm not the first one to hit it, see for example https://theredblacktree.wordpress.com/2014/08/10/fatal-cannot-locate-cpu-mhz-in-proccpuinfo/ https://devtalk.nvidia.com/default/topic/765800/workaround-for-fatal-cannot-locate-cpu-mhz-in-proc-cpuinf/?offset=1 Reading original changelog, I have to say "Stop breaking working setups. You know who you are!". Signed-off-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Daniel Borkmann authored
Commit a074335a ("x86, um: Mark system call tables readonly") was supposed to mark the sys_call_table in UML as RO by adding the const, but it doesn't have the desired effect as it's nevertheless being placed into the data section since __cacheline_aligned enforces sys_call_table being placed into .data..cacheline_aligned instead. We need to use the ____cacheline_aligned version instead to fix this issue. Before: $ nm -v arch/x86/um/sys_call_table_64.o | grep -1 "sys_call_table" U sys_writev 0000000000000000 D sys_call_table 0000000000000000 D syscall_table_size After: $ nm -v arch/x86/um/sys_call_table_64.o | grep -1 "sys_call_table" U sys_writev 0000000000000000 R sys_call_table 0000000000000000 D syscall_table_size Fixes: a074335a ("x86, um: Mark system call tables readonly") Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Richard Weinberger <richard@nod.at>
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Richard Weinberger authored
futex_atomic_cmpxchg_inatomic() does not work on UML because it triggers a copy_from_user() in kernel context. On UML copy_from_user() can only be used if the kernel was called by a real user space process such that UML can use ptrace() to fetch the value. Reported-by: Miklos Szeredi <miklos@szeredi.hu> Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Richard Weinberger <richard@nod.at> Tested-by: Daniel Walter <d.walter@0x90.at>
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- 02 Jan, 2015 3 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "This is a set of three fixes: one to correct an abort path thinko causing failures (and a panic) in USB on device misbehaviour, One to fix an out of order issue in the fnic driver and one to match discard expectations to qemu which otherwise cause Linux to behave badly as a guest" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: SCSI: fix regression in scsi_send_eh_cmnd() fnic: IOMMU Fault occurs when IO and abort IO is out of order sd: tweak discard heuristics to work around QEMU SCSI issue
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/soundLinus Torvalds authored
Pull sound fixes from Takashi Iwai: "Nothing too exciting as a new year's start here: most of fixes are for ASoC, a boot crash fix on OMAP for deferred probe, a few driver specific fixes (Intel, dwc, rockchip, rt5677), in addition to typo fixes in kerneldoc comments for PCM" * tag 'sound-3.19-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: pcm: Fix kerneldoc for params_*() functions ASoC: rockchip: i2s: fix maxburst of dma data to 4 ASoC: rockchip: i2s: fix error defination of transmit data level ASoC: Intel: correct the fixed free block allocation ASoC: rt5677: fixed rt5677_dsp_vad_put rt5677_dsp_vad_get panic ASoC: Intel: Fix BYTCR machine driver MODULE_ALIAS ASoC: Intel: Fix BYTCR firmware name ASoC: dwc: Iterate over all channels ASoC: dwc: Ensure FIFOs are flushed to prevent channel swap ASoC: Intel: Add I2C dependency to two new machines ASoC: dapm: Remove snd_soc_of_parse_audio_routing() due to deferred probe
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git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds authored
Pull vhost cleanup and virtio bugfix "There's a single change here, fixing a vhost bug where vhost initialization fails due to used ring alignment check being too strict" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vhost: relax used address alignment virtio_ring: document alignment requirements
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- 31 Dec, 2014 10 commits
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git://git.infradead.org/users/pcmoore/auditLinus Torvalds authored
Pull audit fix from Paul Moore: "One audit patch to resolve a panic/oops when recording filenames in the audit log, see the mail archive link below. The fix isn't as nice as I would like, as it involves an allocate/copy of the filename, but it solves the problem and the overhead should only affect users who have configured audit rules involving file names. We'll revisit this issue with future kernels in an attempt to make this suck less, but in the meantime I think this fix should go into the next release of v3.19-rcX. [ https://marc.info/?t=141986927600001&r=1&w=2 ]" * 'upstream' of git://git.infradead.org/users/pcmoore/audit: audit: create private file name copies when auditing inodes
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Linus Torvalds authored
This reverts commit 9d469d03. It breaks the Chromebook Pixel touchpad (and touchscreen). Reported-by: Dirk Hohndel <dirk@hohndel.org> Bisected-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nick Dyer <nick.dyer@itdev.co.uk> Cc: Benson Leung <bleung@chromium.org> Cc: Yufeng Shen <miletus@chromium.org> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: stable@vger.kernel.org # v3.16+ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.rocketboards.org/linux-socfpga-nextLinus Torvalds authored
Pull arch/nios2 fixes from Ley Foon Tan: - fix compilation error when enable CONFIG_PREEMPT - initialize cpuinfo.mmu variable supplied by the device tree * tag 'nios2-fixes-v3.19-rc3' of git://git.rocketboards.org/linux-socfpga-next: nios2: Use preempt_schedule_irq nios2: Initialize cpuinfo.mmu
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds authored
Pull crypto fix from Herbert Xu: "Fix a use-after-free crash in the user-space crypto API" * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: af_alg - fix backlog handling
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Tobias Klauser authored
Follow aa0d5326 ("ia64: Use preempt_schedule_irq") and use preempt_schedule_irq instead of enabling/disabling interrupts and messing around with PREEMPT_ACTIVE in the nios2 low-level preemption code ourselves. Also get rid of the now needless re-check for TIF_NEED_RESCHED, preempt_schedule_irq will already take care of rescheduling. This also fixes the following build error when building with CONFIG_PREEMPT: arch/nios2/kernel/built-in.o: In function `need_resched': arch/nios2/kernel/entry.S:374: undefined reference to `PREEMPT_ACTIVE' Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <lftan@altera.com>
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Walter Goossens authored
This patch initializes the mmu field of the cpuinfo structure to the value supplied by the devicetree. Signed-off-by: Walter Goossens <waltergoossens@home.nl> Acked-by: Ley Foon Tan <lftan@altera.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull ARM SoC fixes from Arnd Bergmann: "A very small set of fixes for 3.19, as everyone was out. The clocksource patch was something I missed for the merge window after the change that broke arm64 was merged through arm-soc. The other two patches are a fix for an undetected merge problem in mvebu and a defconfig change to make some exynos boards work with the normal multi_v7_defconfig" * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: Add USB_EHCI_EXYNOS to multi_v7_defconfig ARM: mvebu: Fix pinctrl configuration for Armada 370 DB clocksource: arch_timer: Only use the virtual counter (CNTVCT) on arm64
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git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linuxLinus Torvalds authored
Pull fbdev fixes from Tomi Valkeinen: - Fix regression with Nokia N900 display - Fix crash on fbdev using freed __initdata logos - Fix fb_deferred_io_fsync() return value. * tag 'fbdev-fixes-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: OMAPDSS: SDI: fix output port_num video/fbdev: fix defio's fsync video/logo: prevent use of logos after they have been freed OMAPDSS: pll: NULL dereference in error handling OMAPDSS: HDMI: remove double initializer entries
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/inputLinus Torvalds authored
Pull input layer fixes from Dmitry Torokhov: "Fixes for v7 protocol for ALPS devices and few other driver fixes. Also users can request input events to be stamped with boot time timestamps, in addition to real and monotonic timestamps" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: hil_kbd - fix incorrect use of init_completion Input: alps - v7: document the v7 touchpad packet protocol Input: alps - v7: fix finger counting for > 2 fingers on clickpads Input: alps - v7: sometimes a single touch is reported in mt[1] Input: alps - v7: ignore new packets Input: evdev - add CLOCK_BOOTTIME support Input: psmouse - expose drift duration for IBM trackpoints Input: stmpe - bias keypad columns properly Input: stmpe - enforce device tree only mode mfd: stmpe: add pull up/down register offsets for STMPE Input: optimize events_per_packet count calculation Input: edt-ft5x06 - fixed a macro coding style issue Input: gpio_keys - replace timer and workqueue with delayed workqueue Input: gpio_keys - allow separating gpio and irq in device tree
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Jiri Kosina authored
This reverts commit 24a0aa21. It's causing severe userspace breakage. Namely, all the utilities from wireless-utils which are relying on CONFIG_WEXT (which means tools like 'iwconfig', 'iwlist', etc) are not working anymore. There is a 'iw' utility in newer wireless-tools, which is supposed to be a replacement for all the "deprecated" binaries, but it's far away from being massively adopted. Please see [1] for example of the userspace breakage this is causing. In addition to that, Larry Finger reports [2] that this patch is also causing ipw2200 driver being impossible to build. To me this clearly shows that CONFIG_WEXT is far, far away from being "deprecated enough" to be removed. [1] http://thread.gmane.org/gmane.linux.kernel/1857010 [2] http://thread.gmane.org/gmane.linux.network/343688Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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- 30 Dec, 2014 2 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) Fix double SKB free in bluetooth 6lowpan layer, from Jukka Rissanen. 2) Fix receive checksum handling in enic driver, from Govindarajulu Varadarajan. 3) Fix NAPI poll list corruption in virtio_net and caif_virtio, from Herbert Xu. Also, add code to detect drivers that have this mistake in the future. 4) Fix doorbell endianness handling in mlx4 driver, from Amir Vadai. 5) Don't clobber IP6CB() before xfrm6_policy_check() is called in TCP input path,f rom Nicolas Dichtel. 6) Fix MPLS action validation in openvswitch, from Pravin B Shelar. 7) Fix double SKB free in vxlan driver, also from Pravin. 8) When we scrub a packet, which happens when we are switching the context of the packet (namespace, etc.), we should reset the secmark. From Thomas Graf. 9) ->ndo_gso_check() needs to do more than return true/false, it also has to allow the driver to clear netdev feature bits in order for the caller to be able to proceed properly. From Jesse Gross. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (62 commits) genetlink: A genl_bind() to an out-of-range multicast group should not WARN(). netlink/genetlink: pass network namespace to bind/unbind ne2k-pci: Add pci_disable_device in error handling bonding: change error message to debug message in __bond_release_one() genetlink: pass multicast bind/unbind to families netlink: call unbind when releasing socket netlink: update listeners directly when removing socket genetlink: pass only network namespace to genl_has_listeners() netlink: rename netlink_unbind() to netlink_undo_bind() net: Generalize ndo_gso_check to ndo_features_check net: incorrect use of init_completion fixup neigh: remove next ptr from struct neigh_table net: xilinx: Remove unnecessary temac_property in the driver net: phy: micrel: use generic config_init for KSZ8021/KSZ8031 net/core: Handle csum for CHECKSUM_COMPLETE VXLAN forwarding openvswitch: fix odd_ptr_err.cocci warnings Bluetooth: Fix accepting connections when not using mgmt Bluetooth: Fix controller configuration with HCI_QUIRK_INVALID_BDADDR brcmfmac: Do not crash if platform data is not populated ipw2200: select CFG80211_WEXT ...
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Linus Torvalds authored
Merge tag 'linux-kselftest-3.19-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull kselftest fix from Shuah Khan: "Fix exec test compile warnings" * tag 'linux-kselftest-3.19-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests/exec: Use %zu to format size_t
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