- 20 May, 2006 4 commits
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Trond Myklebust authored
sys_flock() currently has a race which can result in a double free in the multi-thread case. Thread 1 Thread 2 sys_flock(file, LOCK_EX) sys_flock(file, LOCK_UN) If Thread 2 removes the lock from inode->i_lock before Thread 1 tests for list_empty(&lock->fl_link) at the end of sys_flock, then both threads will end up calling locks_free_lock for the same lock. Fix is to make flock_lock_file() do the same as posix_lock_file(), namely to make a copy of the request, so that the caller can always free the lock. This also has the side-effect of fixing up a reference problem in the lockd handling of flock. Signed-off-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by:
Chris Wright <chrisw@sous-sol.org>
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Pete Zaitcev authored
In kernel 2.6.16, if a mounted storage device is removed, an oops happens because ub supplies an interface device (and kobject) to the block layer, but neglects to pin it. And apparently, the block layer expects its users to pin device structures. The code in ub was broken this way for years. But the bug was exposed only by 2.6.16 when it started to call block_uevent on close, which traverses device structures (kobjects actually). Signed-off-by:
Pete Zaitcev <zaitcev@redhat.com> Signed-off-by:
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Craig Brind authored
Fixes Rhine I cards disclosing fragments of previously transmitted frames in new transmissions. Before transmission, any socket buffer (skb) shorter than the ethernet minimum length of 60 bytes was zero-padded. On Rhine I cards the data can later be copied into an aligned transmission buffer without copying this padding. This resulted in the transmission of the frame with the extra bytes beyond the provided content leaking the previous contents of this buffer on to the network. Now zero-padding is repeated in the local aligned buffer if one is used. Following a suggestion from the via-rhine maintainer, no attempt is made here to avoid the duplicated effort of padding the skb if it is known that an aligned buffer will definitely be used. This is to make the change "obviously correct" and allow it to be applied to a stable kernel if necessary. There is no change to the flow of control and the changes are only to the Rhine I code path. The patch has run on an in-service Rhine-I host without incident. Frames shorter than 60 bytes are now correctly zero-padded when captured on a separate host. I see no unusual stats reported by ifconfig, and no unusual log messages. Signed-off-by:
Craig Brind <craigbrind@gmail.com> Signed-off-by:
Roger Luethi <rl@hellgate.ch> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by:
Jeff Garzik <jeff@garzik.org> Signed-off-by:
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NeilBrown authored
We should add to the counter for the rdev *after* checking if the rdev is NULL!!! Signed-off-by:
Neil Brown <neilb@suse.de> Signed-off-by:
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- 11 May, 2006 2 commits
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Chris Wright authored
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Trond Myklebust authored
It is insane to be giving lease_init() the task of freeing the lock it is supposed to initialise, given that the lock is not guaranteed to be allocated on the stack. This causes lockups in fcntl_setlease(). Problem diagnosed by Daniel Hokka Zakrisson <daniel@hozac.com> Also fix a slab leak in __setlease() due to an uninitialised return value. Problem diagnosed by Björn Steinbrink. Signed-off-by:
Daniel Hokka Zakrisson <daniel@hozac.com> Signed-off-by:
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- 09 May, 2006 5 commits
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Chris Wright authored
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Vladislav Yasevich authored
There is a rare situation that causes lksctp to go into infinite recursion and crash the system. The trigger is a packet that contains at least the first two DATA fragments of a message bundled together. The recursion is triggered when the user data buffer is smaller that the full data message. The problem is that we clone the skb for every fragment in the message. When reassembling the full message, we try to link skbs from the "first fragment" clone using the frag_list. However, since the frag_list is shared between two clones in this rare situation, we end up setting the frag_list pointer of the second fragment to point to itself. This causes sctp_skb_pull() to potentially recurse indefinitely. Proposed solution is to make a copy of the skb when attempting to link things using frag_list. Signed-off-by:
Vladislav Yasevich <vladsilav.yasevich@hp.com> Signed-off-by:
Sridhar Samudrala <sri@us.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Neil Horman authored
This patch fixes a deadlock situation in the receive path by allowing temporary spillover of the receive buffer. - If the chunk we receive has a tsn that immediately follows the ctsn, accept it even if we run out of receive buffer space and renege data with higher TSNs. - Once we accept one chunk in a packet, accept all the remaining chunks even if we run out of receive buffer space. Signed-off-by:
Neil Horman <nhorman@tuxdriver.com> Acked-by:
Mark Butler <butlerm@middle.net> Acked-by:
Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by:
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Sridhar Samudrala authored
Discard an unexpected chunk in CLOSED state rather can calling BUG(). Signed-off-by:
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Sridhar Samudrala authored
Use pskb_pull() to handle incoming COOKIE_ECHO and HEARTBEAT chunks that are received as skb's with fragment list. Signed-off-by:
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- 05 May, 2006 2 commits
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Chris Wright authored
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Olaf Kirch authored
Mark Moseley reported that a chroot environment on a SMB share can be left via "cd ..\\". Similar to CVE-2006-1863 issue with cifs, this fix is for smbfs. Steven French <sfrench@us.ibm.com> wrote: Looks fine to me. This should catch the slash on lookup or equivalent, which will be all obvious paths of interest. Signed-off-by:
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- 02 May, 2006 2 commits
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Greg Kroah-Hartman authored
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Patrick McHardy authored
[NETFILTER]: SCTP conntrack: fix infinite loop fix infinite loop in the SCTP-netfilter code: check SCTP chunk size to guarantee progress of for_each_sctp_chunk(). (all other uses of for_each_sctp_chunk() are preceded by do_basic_checks(), so this fix should be complete.) Based on patch from Ingo Molnar <mingo@elte.hu> Signed-off-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
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- 01 May, 2006 25 commits
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Greg Kroah-Hartman authored
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Chuck Ebbert authored
The FXSAVE information leak patch introduced a bug in FP exception handling: it clears FP exceptions only when there are already none outstanding. Mikael Pettersson reported that causes problems with the Erlang runtime and has tested this fix. Signed-off-by:
Chuck Ebbert <76306.1226@compuserve.com> Acked-by:
Mikael Pettersson <mikpe@it.uu.se> Signed-off-by:
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Win Treese authored
In the branch emulation for floating-point exceptions, __compute_return_epc must determine for bc1f et al which condition code bit to test. This is based on bits <4:2> of the rt field. The switch statement to distinguish bc1f et al needs to use only the two low bits of rt, but the old code tests on the whole rt field. This patch masks off the proper bits. Signed-off-by:
Win Treese <treese@acm.org> Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
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Atsushi Nemoto authored
Fix the cache index value in tx49_blast_icache32_page_indexed(). This is damage by de62893b commit. Signed-off-by:
Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by:
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Ralf Baechle authored
Signed-off-by:
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Ralf Baechle authored
Gcc might emit an absolute address for the the "m" constraint which gas unfortunately does not permit. Signed-off-by:
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Auke Kok authored
Update skb with the real packet size. Signed-off-by:
Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by:
Auke Kok <auke-jan.h.kok@intel.com> Signed-off-by:
John Ronciak <john.ronciak@intel.com> Signed-off-by:
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Zachary Amsden authored
Proposed fix for ptep_get_and_clear_full PAE bug. Pte_clear had the same bug, so use the same fix for both. Turns out pmd_clear had it as well, but pgds are not affected. The problem is rather intricate. Page table entries in PAE mode are 64-bits wide, but the only atomic 8-byte write operation available in 32-bit mode is cmpxchg8b, which is expensive (at least on P4), and thus avoided. But it can happen that the processor may prefetch entries into the TLB in the middle of an operation which clears a page table entry. So one must always clear the P-bit in the low word of the page table entry first when clearing it. Since the sequence *ptep = __pte(0) leaves the order of the write dependent on the compiler, it must be coded explicitly as a clear of the low word followed by a clear of the high word. Further, there must be a write memory barrier here to enforce proper ordering by the compiler (and, in the future, by the processor as well). On > 4GB memory machines, the implementation of pte_clear for PAE was clearly deficient, as it could leave virtual mappings of physical memory above 4GB aliased to memory below 4GB in the TLB. The implementation of ptep_get_and_clear_full has a similar bug, although not nearly as likely to occur, since the mappings being cleared are in the process of being destroyed, and should never be dereferenced again. But, as luck would have it, it is possible to trigger bugs even without ever dereferencing these bogus TLB mappings, even if the clear is followed fairly soon after with a TLB flush or invalidation. The problem is that memory above 4GB may now be aliased into the first 4GB of memory, and in fact, may hit a region of memory with non-memory semantics. These regions include AGP and PCI space. As such, these memory regions are not cached by the processor. This introduces the bug. The processor can speculate memory operations, including memory writes, as long as they are committed with the proper ordering. Speculating a memory write to a linear address that has a bogus TLB mapping is possible. Normally, the speculation is harmless. But for cached memory, it does leave the falsely speculated cacheline unmodified, but in a dirty state. This cache line will be eventually written back. If this cacheline happens to intersect a region of memory that is not protected by the cache coherency protocol, it can corrupt data in I/O memory, which is generally a very bad thing to do, and can cause total system failure or just plain undefined behavior. These bugs are extremely unlikely, but the severity is of such magnitude, and the fix so simple that I think fixing them immediately is justified. Also, they are nearly impossible to debug. Signed-off-by:
Zachary Amsden <zach@vmware.com> Signed-off-by:
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James Morris authored
This patch addresses a flaw in LSM, where there is no mediation of readv() and writev() in for 32-bit compatible apps using a 64-bit kernel. This bug was discovered and fixed initially in the native readv/writev code [1], but was not fixed in the compat code. Thanks to Al for spotting this one. [1] http://lwn.net/Articles/154282/Signed-off-by:
James Morris <jmorris@namei.org> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Ivan Kokshaysky authored
As it turned out after recent SCSI changes, strncpy() was broken - it mixed up the return values from __stxncpy() in registers $24 and $27. Thanks to Mathieu Chouquet-Stringer for tracking down the problem and providing an excellent test case. Signed-off-by:
Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by:
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Greg Howard authored
Fix Altix system controller (snsc) device names to include the slot number of the blade whose associated system controller is the target of the device interface. Including the slot number avoids a problem we're currently having where slots within the same enclosure are attempting to create multiple kobjects with identical names. Signed-off-by:
Greg Howard <ghoward@sgi.com> Signed-off-by:
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Jan Kara authored
reiserfs_cache_default_acl() should return whether we successfully found the acl or not. We have to return correct value even if reiserfs_get_acl() returns error code and not just 0. Otherwise callers such as reiserfs_mkdir() can unnecessarily lock the xattrs and later functions such as reiserfs_new_inode() fail to notice that we have already taken the lock and try to take it again with obvious consequences. Signed-off-by:
Jan Kara <jack@suse.cz> Cc: <reiserfs-dev@namesys.com> Signed-off-by:
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Andrew Morton authored
Repair /proc/devices early-termination regression. 2.6.16 broke /proc/devices. An application often gets an EOF before the end of data is reached, if that application uses a series of short read(2)s to access the data. I have used read buffers of varying sizes with varying degrees of unsuccess (larger sizes get further into the data than smaller sizes, following a simple pattern). It appears that the only safe way to get the data is to use a single read buffer larger than all the data in /proc/devices. The following example demonstates the problem: # dd if=/proc/devices bs=1 Character devices: 1 mem 27+0 records in 27+0 records out This patch is a backport of the fix recently accepted to Linus's tree: commit 68eef3b4 [PATCH] Simplify proc/devices and fix early termination regression It replaces the complex, state-machine algorithm introduced in 2.6.16 with a simple algorithm, modeled on the implementation of /proc/interrupts. [akpm@osdl.org: cleanups, simplifications] Signed-off-by:Joe Korty <joe.korty@ccur.com> Signed-off-by:
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Jun'ichi Nomura authored
If dm_suspend() is cancelled, bios already added to the deferred list need to be submitted. Otherwise they remain 'in limbo' until there's a dm_resume(). Signed-off-by:
Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by:
Alasdair G Kergon <agk@redhat.com> Signed-off-by:
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Alasdair G Kergon authored
Before removing a snapshot, wait for the completion of any kcopyd jobs using it. Do this by maintaining a count (nr_jobs) of how many outstanding jobs each kcopyd_client has. The snapshot destructor first unregisters the snapshot so that no new kcopyd jobs (created by writes to the origin) will reference that particular snapshot. kcopyd_client_destroy() is now run next to wait for the completion of any outstanding jobs before the snapshot exception structures (that those jobs reference) are freed. Signed-off-by:
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Michael Krufky authored
This patch prevents a bug where the frontend is unable to tune after waking from powered down state. Now, the device remains powered on until it is disconnected, just like the windows driver. It seems that the bluebird firmware is unable to successfully handle tuning after a powered down state. This patch fixes all of the FusionHDTV Bluebird USB2 devices. The Medion MD95700 will still behave as before, since it was unaffected by this bug. Signed-off-by:
Michael Krufky <mkrufky@linuxtv.org> Signed-off-by:
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Jose Alberto Reguero authored
This patch fixes tv-out support for the newer model of the pvr350, which has a saa7129 instead of a saa7127 video encoder. Signed-off-by:
Jose Alberto Reguero <jareguero@telefonica.net> Signed-off-by:
Mauro Carvalho Chehab <mchehab@infradead.org> Signed-off-by:
Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by:
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Andrew Morton authored
Backport for_each_possible_cpu() into 2.6.16. Fixes the alpha build, and any future occurrences. Signed-off-by:
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Michael Krufky authored
BBTI has updated their driver, and removed the old one from their website. This patch updates the get_dvb_firmware script to download the firmware from the new driver location. Signed-off-by:
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Daniel Drake authored
If compiled into the kernel, parport_register_driver() is called before the parport driver has been initalised. This means that it is expected that tp_count is 0 after the parport_register_driver() call() - tipar's attach function will not be called until later during bootup. Signed-off-by:
Daniel Drake <dsd@gentoo.org> Signed-off-by:
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Eric Sesterhenn authored
since the arrays are declared as in_urbs[N_IN_URB] and out_urbs[N_OUT_URB] both for loops, go one over the end of the array. This fixes coverity id #555 This patch was already included in Linus' tree. Signed-off-by:
Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Mike Waychison authored
We do this by removing a micro-optimization that tries to avoid grabbing the iommu_bitmap_lock spinlock and using a bus-locked operation. This still races with other simultaneous alloc_iommu or free_iommu(size > 1) which both use bus-unlocked operations. The end result of this race is eventually ending up with an iommu_gart_bitmap that has bits errornously set all over, making large contiguous iommu space allocations fail with 'PCI-DMA: Out of IOMMU space'. Signed-off-by:
Mike Waychison <mikew@google.com> Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Andi Kleen authored
This quietens warnings and actually fixes a bug. The unwind tables would come out wrong without -32, causing pthread cancellation during them to crash in the gcc runtime. The problem seems to only happen with newer binutils (it doesn't happen with 2.16.91.0.2 but happens wit 2.16.91.0.5) Thanks to Brian Baker @ HP for test case and initial analysis. Cc: brian.b@hp.com Signed-off-by:
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Jason Baron authored
hi, The motivation behind the patch below was to address messages in /var/log/messages such as: Jan 31 10:54:15 mets kernel: audit(:0): major=252 name_count=0: freeing multiple contexts (1) Jan 31 10:54:15 mets kernel: audit(:0): major=113 name_count=0: freeing multiple contexts (2) I can reproduce by running 'get-edid' from: http://john.fremlin.de/programs/linux/read-edid/. These messages come about in the log b/c the vm86 calls do not exit via the normal system call exit paths and thus do not call 'audit_syscall_exit'. The next system call will then free the context for itself and for the vm86 context, thus generating the above messages. This patch addresses the issue by simply adding a call to 'audit_syscall_exit' from the vm86 code. Besides fixing the above error messages the patch also now allows vm86 system calls to become auditable. This is useful since strace does not appear to properly record the return values from sys_vm86. I think this patch is also a step in the right direction in terms of cleaning up some core auditing code. If we can correct any other paths that do not properly call the audit exit and entries points, then we can also eliminate the notion of context chaining. I've tested this patch by verifying that the log messages no longer appear, and that the audit records for sys_vm86 appear to be correct. Also, 'read_edid' produces itentical output. thanks, -Jason Signed-off-by:
Jason Baron <jbaron@redhat.com> Signed-off-by:
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Thayumanavar Sachithanantham authored
[PATCH] cs5535_gpio.c: call cdev_del() during module_exit to unmap kobject references and other cleanups During module unloading, cdev_del() must be called to unmap cdev related kobject references and other cleanups(such as inode->i_cdev being set to NULL) which prevents the OOPS upon subsequent loading, usage and unloading of modules(as seen in the mail thread http://marc.theaimsgroup.com/?l=linux-kernel&m=114533640609018&w=2). Also, remove unneeded test of gpio_base. Signed-off-by:
Thayumanavar Sachithanantham <thayumk@gmail.com> Signed-off-by:
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