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authorHugh Dickins <hugh@veritas.com>2008-07-28 15:46:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-28 16:30:20 -0700
commit14fcc23fdc78e9d32372553ccf21758a9bd56fa1 (patch)
tree594fc0e0e85c03205ba2d80a4b4e0a8fc6ffaa8a /lib
parentca5b172bd2b2fe489e7ba11cedd46ddf772d132f (diff)
tmpfs: fix kernel BUG in shmem_delete_inode
SuSE's insserve initscript ordering program hits kernel BUG at mm/shmem.c:814 on 2.6.26. It's using posix_fadvise on directories, and the shmem_readpage method added in 2.6.23 is letting POSIX_FADV_WILLNEED allocate useless pages to a tmpfs directory, incrementing i_blocks count but never decrementing it. Fix this by assigning shmem_aops (pointing to readpage and writepage and set_page_dirty) only when it's needed, on a regular file or a long symlink. Many thanks to Kel for outstanding bugreport and steps to reproduce it. Reported-by: Kel Modderman <kel@otaku42.de> Tested-by: Kel Modderman <kel@otaku42.de> Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: <stable@kernel.org> [2.6.25.x, 2.6.26.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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