- 06 Jul, 2006 1 commit
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Greg Kroah-Hartman authored
Based on a patch from Ernie Petrides During security research, Red Hat discovered a behavioral flaw in core dump handling. A local user could create a program that would cause a core file to be dumped into a directory they would not normally have permissions to write to. This could lead to a denial of service (disk consumption), or allow the local user to gain root privileges. Signed-off-by:Greg Kroah-Hartman <gregkh@suse.de>
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- 30 Jun, 2006 3 commits
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Greg Kroah-Hartman authored
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Chris Wright authored
Should have not been applied to 2.6.16 Signed-off-by:
Chris Wright <chrisw@sous-sol.org> Signed-off-by:
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Patrick McHardy authored
When a packet without any chunks is received, the newconntrack variable in sctp_packet contains an out of bounds value that is used to look up an pointer from the array of timeouts, which is then dereferenced, resulting in a crash. Make sure at least a single chunk is present. Problem noticed by George A. Theall <theall@tenablesecurity.com> Signed-off-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
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- 22 Jun, 2006 13 commits
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Chris Wright authored
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Anton Altaparmakov authored
It fixes a crash in NTFS on architectures where flush_dcache_page() is a real function. I never noticed this as all my testing is done on i386 where flush_dcache_page() is NULL. http://bugzilla.kernel.org/show_bug.cgi?id=6700 Many thanks to Pauline Ng for the detailed bug report and analysis! Signed-off-by:
Anton Altaparmakov <aia21@cantab.net> Cc: <stable@kernel.org> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Andrew Morton authored
Work around the oops reported in http://bugzilla.kernel.org/show_bug.cgi?id=6478. Thanks to Ralf Hildebrandt <ralf.hildebrandt@charite.de> for testing and reporting. Acked-by:
Dave Jones <davej@codemonkey.org.uk> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by:
Linus Torvalds <torvalds@osdl.org> Signed-off-by:
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Markus Lidel authored
- Fixed locking of struct i2o_exec_wait in Executive-OSM - Removed LCT Notify in i2o_exec_probe() which caused freeing memory and accessing freed memory during first enumeration of I2O devices - Added missing locking in i2o_exec_lct_notify() - removed put_device() of I2O controller in i2o_iop_remove() which caused the controller structure get freed to early - Fixed size of mempool in i2o_iop_alloc() - Fixed access to freed memory in i2o_msg_get() See http://bugzilla.kernel.org/show_bug.cgi?id=6561Signed-off-by:
Markus Lidel <Markus.Lidel@shadowconnect.com> Signed-off-by:
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James Bottomley authored
The calculation of nr_pages in scsi_req_map_sg() doesn't account for the fact that the first page could have an offset that pushes the end of the buffer onto a new page. Signed-off-by:
Bryan Holty <lgeek@frontiernet.net> Signed-off-by:
James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by:
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Dave Kleikamp authored
It looks like metapage_releasepage was making in invalid assumption that the releasepage method would not be called on a dirty page. Instead of issuing a warning and releasing the metapage, it should return 0, indicating that the private data for the page cannot be released. I also realized that metapage_releasepage had the return code all wrong. If it is successful in releasing the private data, it should return 1, otherwise it needs to return 0. Lastly, there is no need to call wait_on_page_writeback, since try_to_release_page will not call us with a page in writback state. Signed-off-by:
Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by:
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Trond Myklebust authored
We're presently running lock_kernel() under fs_lock via nfs's ->permission handler. That's a ranking bug and sometimes a sleep-in-spinlock bug. This problem was introduced in the openat() patchset. We should not need to hold the current->fs->lock for a codepath that doesn't use current->fs. [vsu@altlinux.ru: fix error path] Signed-off-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Al Viro <viro@ftp.linux.org.uk> Signed-off-by:
Sergey Vlasov <vsu@altlinux.ru> Signed-off-by:
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Robin H. Johnson authored
I noticed a strange behavior in a tmpfs file system the other day, while building packages - occasionally, and seemingly at random, make decided to rebuild a target. However, only on tmpfs. A file would be created, and if checked, it had a sub-second timestamp. However, after an utimes related call where sub-seconds should be set, they were zeroed instead. In the case that a file was created, and utimes(...,NULL) was used on it in the same second, the timestamp on the file moved backwards. After some digging, I found that this was being caused by tmpfs not having a time granularity set, thus inheriting the default 1 second granularity. Hugh adds: yes, we missed tmpfs when the s_time_gran mods went into 2.6.11. Unfortunately, the granularity of CURRENT_TIME, often used in filesystems, does not match the default granularity set by alloc_super. A few more such discrepancies have been found, but this is the most important to fix now. Signed-off-by:
Robin H. Johnson <robbat2@gentoo.org> Acked-by:
Andi Kleen <ak@suse.de> Signed-off-by:
Hugh Dickins <hugh@veritas.com> Signed-off-by:
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Oleg Drokin authored
It seems there is error check missing in open_namei for errors returned through intent.open.file (from lookup_instantiate_filp). If there is plain open performed, then such a check done inside __path_lookup_intent_open called from path_lookup_open(), but when the open is performed with O_CREAT flag set, then __path_lookup_intent_open is only called with LOOKUP_PARENT set where no file opening can occur yet. Later on lookup_hash is called where exact opening might take place and intent.open.file may be filled. If it is filled with error value of some sort, then we get kernel attempting to dereference this error value as address (and corresponding oops) in nameidata_to_filp() called from filp_open(). While this is relatively simple to workaround in ->lookup() method by just checking lookup_instantiate_filp() return value and returning error as needed, this is not so easy in ->d_revalidate(), where we can only return "yes, dentry is valid" or "no, dentry is invalid, perform full lookup again", and just returning 0 on error would cause extra lookup (with potential extra costly RPCs). So in short, I believe that there should be no difference in error handling for opening a file and creating a file in open_namei() and propose this simple patch as a solution. Signed-off-by:
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David Miller authored
Both csum_partial() and the csum_partial_copy*() family of routines forget to do a final fold on the computed checksum value on sparc64. So do the standard Sparc "add + set condition codes, add carry" sequence, then make sure the high 32-bits of the return value are clear. Based upon some excellent detective work and debugging done by Richard Braun and Samuel Thibault. Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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David Miller authored
Using asm-generic/dma-mapping.h does not work because pushing the call down to pci_alloc_coherent() causes the gfp_t argument of dma_alloc_coherent() to be ignored. Fix this by implementing things directly, and adding a gfp_t argument we can use in the internal call down to the PCI DMA implementation of pci_alloc_coherent(). This fixes massive memory corruption when using the sound driver layer, which passes things like __GFP_COMP down into these routines and (correctly) expects that to work. This is a disk eater when sound is used, so it's pretty critical. Signed-off-by:
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David Miller authored
If we move a mapping from one virtual address to another, and this changes the virtual color of the mapping to those pages, we can see corrupt data due to D-cache aliasing. Check for and deal with this by overriding the move_pte() macro. Set things up so that other platforms can cleanly override the move_pte() macro too. This long standing bug corrupts user memory, and in particular has been notorious for corrupting Debian package database files on sparc64 boxes. Signed-off-by:
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Stuart MacDonald authored
Attached patch fixes spurious errors during firmware load. Signed-off-by:
Stuart MacDonald <stuartm@connecttech.com> Signed-off-by:
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- 20 Jun, 2006 5 commits
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Chris Wright authored
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Patrick McHardy authored
Fix endless loop in the SCTP match similar to those already fixed in the SCTP conntrack helper (was CVE-2006-1527). Signed-off-by:
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Oleg Nesterov authored
do_exit() clears ->it_##clock##_expires, but nothing prevents another cpu to attach the timer to exiting process after that. arm_timer() tries to protect against this race, but the check is racy. After exit_notify() does 'write_unlock_irq(&tasklist_lock)' and before do_exit() calls 'schedule() local timer interrupt can find tsk->exit_state != 0. If that state was EXIT_DEAD (or another cpu does sys_wait4) interrupted task has ->signal == NULL. At this moment exiting task has no pending cpu timers, they were cleanuped in __exit_signal()->posix_cpu_timers_exit{,_group}(), so we can just return from irq. John Stultz recently confirmed this bug, see http://marc.theaimsgroup.com/?l=linux-kernel&m=115015841413687Signed-off-by:Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by:
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Oleg Nesterov authored
If the local timer interrupt happens just after do_exit() sets PF_EXITING (and before it clears ->it_xxx_expires) run_posix_cpu_timers() will call check_process_timers() with tasklist_lock + ->siglock held and check_process_timers: t = tsk; do { .... do { t = next_thread(t); } while (unlikely(t->flags & PF_EXITING)); } while (t != tsk); the outer loop will never stop. Actually, the window is bigger. Another process can attach the timer after ->it_xxx_expires was cleared (see the next commit) and the 'if (PF_EXITING)' check in arm_timer() is racy (see the one after that). Signed-off-by: -
Paul Mackerras authored
This fixes a bug found by Dave Jones that means that it is possible for userspace to provoke a machine check on 32-bit kernels. This also fixes a couple of other places where I found similar problems by inspection. Signed-off-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
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- 05 Jun, 2006 13 commits
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Chris Wright authored
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Stefan Richter authored
I added a failure check in patch "sbp2: variable status FIFO address (fix login timeout)" --- alas for a wrong error value. This is a bug since Linux 2.6.16. Leads to NULL pointer dereference if the call failed, and bogus failure handling if call succeeded. Signed-off-by:
Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by:
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Stefan Richter authored
There is a firmware bug in several Apple iPods which prevents access to these iPods under certain conditions. The disk size reported by the iPod is one sector too big. Once access to the end of the disk is attempted, the iPod becomes inaccessible. This problem has been known for USB iPods for some time and has recently been discovered to exist with FireWire/USB combo iPods too. This patch is derived from the fix in Linux 2.6.17, commit e9a1c52c, to be applicable to 2.6.16.x without prerequisite patches. It hard-wires a workaround for three known affected model numbers (those of 4th generation iPod, iPod Photo, iPod mini). Note: This patch lacks Linux 2.6.17's ability to enable and disable the workaround via a module parameter. Signed-off-by:
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Andi Kleen authored
This fixes a regression from the earlier DOS fix for non canonical IRET addresses. It broke UML. int_ret_from_syscall already does syscall exit tracing, so no need to do it again in the caller. This caused problems for UML and some other special programs doing syscall interception. Signed-off-by:
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Vivek Goyal authored
o Start booting into the capture kernel after an Oops if system is in a unrecoverable state. System will boot into the capture kernel, if one is pre-loaded by the user, and capture the kernel core dump. o One of the following conditions should be true to trigger the booting of capture kernel. - panic_on_oops is set. - pid of current thread is 0 - pid of current thread is 1 - Oops happened inside interrupt context. Signed-off-by:Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by:
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Zhu Yi authored
Currently iwlist ethX freq[uency]/channel lists all the channels the card supported for the current region, which includes some channels can only be used in infrastructure mode. This patch filters these channels out if the card is currently in ad-hoc mode. Signed-off-by:
Zhu Yi <yi.zhu@intel.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com> Signed-off-by:
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Mark Lord authored
Okay, just to sum things up. This forces libata to wait for up to 2 seconds for BUSY|DRQ to clear on resume before continuing. [jgarzik adds...] During testing we never saw DRQ asserted, but nonetheless (a) this works and (b) testing for DRQ won't hurt. Signed-off-by:
Mark Lord <liml@rtr.ca> Acked-by:
Jens Axboe <axboe@suse.de> Signed-off-by:
Jeff Garzik <jeff@garzik.org> Signed-off-by:
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Stefan Richter authored
Re-enable posted writes for status FIFO. Besides bringing back a very minor bandwidth tweak from Linux 2.6.15.x and older, this also fixes an interoperability regression since 2.6.16: http://bugzilla.kernel.org/show_bug.cgi?id=6356 (sbp2: scsi_add_device failed. IEEE1394 HD is not working anymore.) Signed-off-by:
Vanei Heidemann <linux@javanei.com.br> Tested-by: Martin Putzlocher <mputzi@gmx.de> (chip type unconfirmed) Signed-off-by:
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Dmitry Torokhov authored
Input: psmouse - fix new device detection logic Reported to fix http://bugs.gentoo.org/130846Signed-off-by:
Dmitry Torokhov <dtor@mail.ru> Cc: Daniel Drake <dsd@gentoo.org> Signed-off-by:
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Johannes Berg authored
For a very long time, echoing 'standby' or 'mem' into /sys/power/state has killed the machine on powerpc. This patch fixes that. This patch adds the .valid callback to pm_ops on PowerMac so that only the suspend to disk state can be entered. Note that just returning 0 would suffice since the upper layers don't pass PM_SUSPEND_DISK down, but we handle it there regardless just in case that changes. Acked-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
Johannes Berg <johannes@sipsolutions.net> Cc: <stable@kernel.org> Signed-off-by:
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Paul Jackson authored
Fix an infrequently encountered 'sleeping function called from invalid context' in the cpuset hooks in __alloc_pages. Could sleep while interrupts disabled. The routine cpuset_zone_allowed() is called by code in mm/page_alloc.c __alloc_pages() to determine if a zone is allowed in the current tasks cpuset. This routine can sleep, for certain GFP_KERNEL allocations, if the zone is on a memory node not allowed in the current cpuset, but might be allowed in a parent cpuset. But we can't sleep in __alloc_pages() if in interrupt, nor if called for a GFP_ATOMIC request (__GFP_WAIT not set in gfp_flags). The rule was intended to be: Don't call cpuset_zone_allowed() if you can't sleep, unless you pass in the __GFP_HARDWALL flag set in gfp_flag, which disables the code that might scan up ancestor cpusets and sleep. This rule was being violated due to a bogus change made (by myself, pj) to __alloc_pages() as part of the November 2005 effort to cleanup its logic. The bogus change can be seen at: http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-11/4691.html [PATCH 01/05] mm fix __alloc_pages cpuset ALLOC_* flags This was first noticed on a tight memory system, in code that was disabling interrupts and doing allocation requests with __GFP_WAIT not set, which resulted in __might_sleep() writing complaints to the log "Debug: sleeping function called ...", when the code in cpuset_zone_allowed() tried to take the callback_sem cpuset semaphore. Special thanks to Dave Chinner, for figuring this out, and a tip of the hat to Nick Piggin who warned me of this back in Nov 2005, before I was ready to listen. Signed-off-by:
Paul Jackson <pj@sgi.com> Signed-off-by:
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Pat Gefre authored
Currently loading the ioc3 as a module will cause the ports to be numbered in reverse order. This mod maintains the proper order of cards for port numbering. Signed-off-by:
Patrick Gefre <pfg@sgi.com> Signed-off-by:
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Brent Casavant authored
Currently loading the ioc4 as a module will cause the ports to be numbered in reverse order. This mod maintains the proper order of cards for port numbering. Signed-off-by:
Brent Casavant <bcasavan@sgi.com> Cc: Pat Gefre <pfg@sgi.com> Signed-off-by:
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- 31 May, 2006 2 commits
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Chris Wright authored
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Marcel Holtmann authored
It appears that sockaddr_in.sin_zero is not zeroed during getsockopt(...SO_ORIGINAL_DST...) operation. This can lead to an information leak (CVE-2006-1343). Signed-off-by:
Marcel Holtmann <marcel@holtmann.org> Signed-off-by:
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- 22 May, 2006 2 commits
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Chris Wright authored
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Patrick McHardy authored
CVE-2006-2444 - Potential remote DoS in SNMP NAT helper. Fix memory corruption caused by snmp_trap_decode: - When snmp_trap_decode fails before the id and address are allocated, the pointers contain random memory, but are freed by the caller (snmp_parse_mangle). - When snmp_trap_decode fails after allocating just the ID, it tries to free both address and ID, but the address pointer still contains random memory. The caller frees both ID and random memory again. - When snmp_trap_decode fails after allocating both, it frees both, and the callers frees both again. The corruption can be triggered remotely when the ip_nat_snmp_basic module is loaded and traffic on port 161 or 162 is NATed. Found by multiple testcases of the trap-app and trap-enc groups of the PROTOS c06-snmpv1 testsuite. Signed-off-by:
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- 20 May, 2006 1 commit
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Chris Wright authored
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