- 03 Jan, 2005 40 commits
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bk://bk.arm.linux.org.uk/linux-2.6-serialLinus Torvalds authored
into ppc970.osdl.org:/home/torvalds/v2.6/linux
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Lennart Poettering authored
From: Lennart Poettering Trivial patch against Linux 2.6.10 which adds PNP support for a certain kind of Rockwell 28.8/ISA modems.
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bk://bk.arm.linux.org.uk/linux-2.6-mmcLinus Torvalds authored
into ppc970.osdl.org:/home/torvalds/v2.6/linux
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Russell King authored
Since all users of this have now been eliminated, we can eliminate the element itself. MMC host drivers now operate only on the scatter lists passed to them, rather than needing knowledge of block devices. Signed-off-by:Russell King <rmk@arm.linux.org.uk>
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Pierre Ossman authored
From: Pierre Ossman Cleanup that fixes a warning in the wbsd module.
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Zwane Mwaikambo authored
noexec_setup runs too late to take any effect, so parse it earlier. Signed-off-by:
Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Heiko Carstens authored
From: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> sclp: core driver cleanup Details: - moved signal shutdown (quiesce) handling into a separate file - cleanup of SCLP core driver: . introduced driver states instead of bits . introduced request retry count and retry limit . sclp_add_request now returns an error code if a request couldn't be started . introduced separate request structure for init_mask requests to simplify code . request timer is now manually checked in sclp_sync_wait because timer interrupts are disabled in this context . removed busy timer - request timer now handles both cases . split up sclp_start_request into __sclp_start_request and sclp_process queue . removed sclp_error_message (unused) . introduced sclp_check_handler function to split up initial init mask test from standard init mask request processing . introduced sclp_deactivate and sclp_reactivate for simplified reboot event handling (and potential use in suspend/resume scenario) . added protection against multiple concurrent init mask calls - minor changes in SCLP core driver: . updated comments . renamed functions to be consistent with "function name starts with __ => needs lock" . renamed internal functions for consistency reasons . introduced inlined helper functions to simplify code . moved EXPORT_SYMBOL definitions next to function definition - changes in sclp console driver . removed callback recursion to prevent stack overflow - changes to CPI module . added check for sclp_add_request return code . changed printks to specify a message level - changes to generic sclp tty layer . removed timed buffer retry after error (timers may not work in some situations) . introduced return code for sclp_emit_buffer - changes to sclp tty driver . removed callback recursion - changes to sclp vt220 driver . removed callback recursion . removed timed buffer retry after error - modified sclp_init_mask to prevent problems with some compiler versions Signed-off-by:Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
From: Carsten Otte <cotte@de.ibm.com> - Fix codingstyle. Signed-off-by:
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Heiko Carstens authored
From: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> From: Stefan Bader <shbader@de.ibm.com> character device driver changes: - tape: Correct module count usage. - 3270: Use mod_timer only when timer is pending. Signed-off-by:
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Heiko Carstens authored
From: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> dasd driver changes: - Modify format analysis routine to use block size provided by on-disk label. - Search data structures when referencing use_diag/ro attribute values. - Correct return code checking when allocating memory. Signed-off-by:
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Heiko Carstens authored
From: Ursula Braun-Krahl <braunu@de.ibm.com> From: Peter Tiedemann <ptiedem@de.ibm.com> From: Thomas Spatzier <tspat@de.ibm.com> From: Frank Pavlic <pavlic@de.ibm.com> - ctc: make sysfs attribute buffer early available. - ctc: remove memory leak for channel ccw struct. - qeth: remove redundant info card->info.ifname. - qeth: enable recovery with retries in qeth_hardsetup_card after unit check. - qeth: do not allow to set layer2 attribute on IQD devices. Signed-off-by:
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Heiko Carstens authored
From: Cornelia Huck <cohuck@de.ibm.com> common i/o layer changes: - Cope with changed cdev->handler. - Split clearing of subchannels from reipl function and declare it in header. Signed-off-by:
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Heiko Carstens authored
s390 core changes: - Disable pfault pseudo page faults before stopping a cpu. - Add exception table for diag10 instruction. - Move initialization of active_mm of idle task to smp_create_idle. - Regenerate default configuration. Signed-off-by:
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Martin Schwidefsky authored
Remove the s390 version of setup_arg_pages32 function and use the generic setup_arg_pages function instead. Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Gerd Knorr authored
Signed-off-by:
Gerd Knorr <kraxel@bytesex.org> Signed-off-by:
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Gerd Knorr authored
Add sysfs support to the uml network driver. Also comment the eth_init function, I think that one is never ever needed as the devices are initialized when the underlying transport mechanism registeres. Signed-off-by:
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Gerd Knorr authored
Signed-off-by:
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Gerd Knorr authored
Fixup initialization order when creating the $HOME/.uml/<umid> directory and the files therein, also make the error messages more useful. Signed-off-by:
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Gerd Knorr authored
export a missing symbol, IIRC xfs needs that one. Signed-off-by:
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Jeff Dike authored
Remove a reference to an unused variable. Signed-off-by:
Jeff Dike <jdike@addtoit.com> Signed-off-by:
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Jeff Dike authored
Before Bodo's signal fixes and my signal delivery rework, it was possible for a process to execute UML code by running the default signal restorer. This is no longer possible, so this check can be removed from the sanity test for UML accidentally tracing itself. Signed-off-by:
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Jeff Dike authored
Add a declaration for ptrace_setfpregs Signed-off-by:
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Jeff Dike authored
This implements using the new ptrace option SYSEMU_SINGLESTEP in UML (advanced sysemu) in SKAS and TT modes. To have a fast selection of the appropriate ptrace option to use next, a 2 dimensional arry is used and singlestepping() is modified to return 0,1 or 2: 0 = don't do singlestepping 1 = singlestep a syscall 2 = singlestep a "non syscall" instruction In do_syscall() writing of the syscall number is supressed, if the advanced sysemu is in use (that does it itself). Signed-off-by:Bodo Stroesser <bstroesser@fujitsu-siemens.com> Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser <bstroesser@fujitsu-siemens.com> This implements checking for the new ptrace option SYSEMU_SINGLESTEP (advanced sysemu) and allows the values 0,1,2 for /proc/sysemu, if advanced sysemu is available: 0 = don't use sysemu 1 = use sysemu, but don't use advanced sysemu 2 = use sysemu and advanced sysemu Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser <bstroesser@fujitsu-siemens.com> In call to update_process_times() set parameter user correctly. (was from for SKAS). Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser <bstroesser@fujitsu-siemens.com> Restoring of current->blocked in sys_sigreturn is wrong. The first (long ) of the mask correctly is fetched from sc->oldmask. The further longs again come from there, but correctly should be taken from frame->extramask. Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser <bstroesser@fujitsu-siemens.com> Usage of SYSEMU in TT mode is modified, so that always the same method is used in do_syscall as has been used before in ptrace(PTRACE_SYSCALL/SYSEMU, ...) Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser <bstroesser@fujitsu-siemens.com> This patch fixes compilation on 2.4 hosts by not relying on macros from 2.6 host kernel headers in one userspace file. It's about AT_SYSINFO_* macros. Signed-off-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it> Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser <bstroesser@fujitsu-siemens.com> My older patch, that sets TIF_SIGPENDING after an ptrace-interception in syscall_trace() is wrong. Some syscalls want to be called without any signal pending. If a signal is pending on syscall-entry, they immediately return with -ERESTARTNOINTR. Thus, on return to user, the pending signals can be processed and the kernel will lower eip by 2 to have the syscall restarted after that. Since my change sets TIF_SIGPENDING on the entry and exit interception, stracing such a syscall looped! Try "strace ls" to see what happens. Fix: set TIF_SIGPENDING on the exit interception only. This avoids the loop and is enough for security. Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser The implementation of sys_sigreturn() and sys_rt_sigreturn() in UML must be changed. This is necessary, since the return value of sys_*_sigreturn() is the value of eax in the thread, that was interrupted by the signal handler. If accidentaly eax contains -ERESTART_*, orig_eax *must* be -1 to avoid syscall restart processing in kern_do_signal(). If orig_eax is >=0, eip might be lowered by 2, the process will fail. In UML PT_REGS_SYSCALL_NR() or UPT_SYSCALL_NR() have to be used instead of orig_eax. While writing and testing an exploit for this, I saw that for most interrupts, the syscall number is undefined. So even on a return from interrupt a wrong syscall restart handling could happen. And also: UML resumes a process with ptrace(PTRACE_SYSCALL/SYSEMU/SINGLESTEP when a syscall in UML in SKAS mode has been processed. But since there is a valid syscall number in the host's orig_eax, the host could do a wrong syscall restarting if the syscall in UML was a sigreturn() returning -ERESTART* To avoid this, in SKAS -1 should be written to regs.orig_eax before restore_registers(). Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser <bstroesser@fujitsu-siemens.com> some modules need end_iomem to be exported. Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser <bstroesser@fujitsu-siemens.com> As Jeff pointed out, the check for address wrapping in access_ok_skas was wrong. Also, change vsyscall_ehdr and vsyscall_end to be unsigned long and export them, since modules need them for access_ok_skas Signed-off-by:
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Jeff Dike authored
Update defconfig for 2.6.10-rc2-mm4. Signed-off-by:
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Jeff Dike authored
This patch changes how UML kills ptraced processes in order to be more correct in the presence of the ptrace changes in 2.6.9. It used to be that ptrace stopped processes could simply be killed and they would go away. Now, there's a new run state for ptraced processes which doesn't receive signals until they are PTRACE_KILLed or PTRACE_CONTinued. So, this patch kills the process, as usual, then PTRACE_KILL and PTRACE_CONT. This is done in os_kill_ptrace_process() for use from skas mode, and in tracer() when it sees a child process getting a SIGKILL. Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser Patch 1/3 to implement usage of PTRACE_O_TRACESYSGOOD This is necessary, to fix UMLs bad behavior when a process does a systemcall with syscall-number less than 0. Insert a check for availability and function of ptrace(PTRACE_SETOPTIONS,,,PTRACE_O_TRACESYSGOOD) into the normal ptrace checks at startup. Patch 2/3 to implement usage of PTRACE_O_TRACESYSGOOD This is necessary, to fix UMLs bad behavior when a process does a systemcall with syscall-number less than 0. This patch makes SKAS-mode use PTRACE_O_TRACESYSGOOD and fixes the problems in SKAS. Patch 3/3 to implement usage of PTRACE_O_TRACESYSGOOD This is necessary, to fix UMLs bad behavior when a process does a systemcall with syscall-number less than 0. This patch makes TT-mode use PTRACE_O_TRACESYSGOOD and fixes the problems in TT. I'm not quite sure, that this patch doesn't cause problems with debugger usage. It should be testet by someone, who has more know how about TT-mode debugger. Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser Complete the dump with the vsyscall-information, if a vsyscall-page is available. Signed-off-by:
Bodo Stroesser <bodo.stroesser@fujitsu-siemens.com> Signed-off-by:
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Jeff Dike authored
From: Bodo Stroesser To make the vsyscall-page available for copy_from_user() and ptrace(), we should use kernel's "gate-vma" mechanism. Therefore we need a valid page structure. To have this, one page (or more) is allocated at boot time, the contents of the vsyscall-page is copied into this page and the page's pte is inserted in swapper's pagetables. Now it will be copied into the pagetables of all processes. Note: this alone doesn't work, since FIXADDR_USER_START and FIXADDR_USER_END are not yet defined correctly. Also access_ok_skas() does not yet grant read accesses to pages not in the normal user area. Risks: Please check the first hunk! I don't know, whether this change is OK. Maybe fixrange_init() is wrong anyway with 3-level-pagetables? Here access_ok_skas() and FIXADDR_USER_XXXX are fixed. Now everything should work fine, while the processes are running. But if a process crashes, the vsyscall-page will not be dumped. Signed-off-by: -
Jeff Dike authored
From: Bodo Stroesser This is the first patch of a series of four. These patches allow the use of sysenter-systemcalls in UML if the host support sysenter. Some facts have to be noted: - the sysenter instruction does not save anything, not even the return address. Thus the host-kernel builds a stackframe with an fixed return address for the backjump to the vsyscall-page. All kernels that support sysenter thus must have a vsyscall-page - The hosts vsyscall-page is visible in all memory-contexts on the host, even in those of the processes running on UML. This cannot be changed. So the best way to implement sysenter is to integrate the host's vsyscall-page into UML, if available. This patch creates a new source file containing an UML initialization function. The function scans the Elf-auxiliary vector that is prepared by the host for relevant information about: - vsyscall elf-header - vsyscall entry - machine type (called "platform", e.g. "i586" or "i686") - hardware capabilities These informations are inserted into the Elf-auxiliary-vector that is generated if an UML process calls "execXX()". If the information from the auxiliray-vector is not complete, UML uses the previos default values, with one exception: if the host has no vsyscall-page, UML now does no longer insert AT_SYSINFO or AT_SYSINFO_EHDR elements. (I think, that's better than writing dummies) Since the host's vsyscall-page is always visible to UML processes, this change is enough to let UML with an i686-compiled glibc use sysenter. what's missing: - is_syscall() in SKAS cannot access the code in the vsyscall-page via copy_from_user(), thus singlesteppers still could break out. (Note: that's not new, if someone jumps willingly to the sysenter-entry in the vsyscall-page, he can do that without the patch, too). - a debugger cannot access the code in the vsyscall-page via ptrace( PEEKTEXT, ...) Risks: could there by any feature of the host's processor, that is indicated in the hardware capabilities, but must not be used in UML? Signed-off-by:
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Paolo \'Blaisorblade\' Giarrusso authored
Fix some bugs left in the failure path of run_helper by the previous patch: it was missing one os_close_file(fds[1]) which is conditional. To use the goto handling model, I set the fd to -1 if it's already closed (I don't want to check if keeping one more pipe-end open is no problem). Also do some cosmethic cleanup: * "err" was what we returned even on success, so just use a neutral "ret". * use tabs, not spaces. * a little more comments. Signed-off-by:
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Paolo \'Blaisorblade\' Giarrusso authored
With Jeff Dike <jdike@addtoit.com>, Fixed a file descriptor leak in the network driver when changing an IP address. Fixed the error handling in run_helper. Paolo notes: Actually, this is part one of the change, the exact one extracted from Jeff Dike's incrementals tree before 2.6.9-rc big UML merge. There is some changes must be done, so I'm also sending a second patch with this one, too. Separated for tracking purposes. Signed-off-by:
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