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authorJeff Mahoney <jeffm@suse.com>2010-10-14 09:53:37 -0400
committerChristoph Hellwig <hch@lst.de>2010-10-14 09:53:37 -0400
commitee52716245877b821f5ddbb3ace85b73084fb450 (patch)
tree3d85d8fce3bde7b1601878074cdec622705d1af2 /fs/hfsplus/hfsplus_raw.h
parent40de9a7cebc4e0b23cd6863c84c2279f0ccadebb (diff)
downloadlinux-linaro-stable-ee52716245877b821f5ddbb3ace85b73084fb450.tar.gz
hfsplus: fix oops on mount with corrupted btree extent records
A particular fsfuzzer run caused an hfs file system to crash on mount. This is due to a corrupted MDB extent record causing a miscalculation of HFSPLUS_I(inode)->first_blocks for the extent tree. If the extent records are zereod out, then it won't trigger the first_blocks special case and instead falls through to the extent code, which we're in the middle of initializing. This patch catches the 0 size extent records, reports the corruption, and fails the mount. [hch: ported of commit 47f365eb575735c6b2edf5d08e0d16d26a9c23bd from hfs] Reported-by: Ramon de Carvalho Valle <rcvalle@linux.vnet.ibm.com> Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Christoph Hellwig <hch@tuxera.com>
Diffstat (limited to 'fs/hfsplus/hfsplus_raw.h')
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