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authorLi Zefan <lizefan@huawei.com>2013-05-09 15:08:15 +0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-09 14:22:47 -0700
commit091d0d55b286c9340201b4ed4470be87fc568228 (patch)
tree5417ab8864fbabe1a9931f3a9a81355cd3d3ebaa /crypto/compress.c
parentde2657f94acd4f0df44626db7c4d2b71babc8cd3 (diff)
shm: fix null pointer deref when userspace specifies invalid hugepage size
Dave reported an oops triggered by trinity: BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 IP: newseg+0x10d/0x390 PGD cf8c1067 PUD cf8c2067 PMD 0 Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC CPU: 2 PID: 7636 Comm: trinity-child2 Not tainted 3.9.0+#67 ... Call Trace: ipcget+0x182/0x380 SyS_shmget+0x5a/0x60 tracesys+0xdd/0xe2 This bug was introduced by commit af73e4d9506d ("hugetlbfs: fix mmap failure in unaligned size request"). Reported-by: Dave Jones <davej@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Li Zefan <lizfan@huawei.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'crypto/compress.c')
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