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authorSiddh Raman Pant <code@siddh.me>2022-12-09 15:51:51 +0530
committerGao Xiang <hsiangkao@linux.alibaba.com>2023-01-10 16:38:53 +0800
commit6acd87d50998ef0afafc441613aeaf5a8f5c9eff (patch)
treedb88a2044f3ca5eaeab09cc31fc14a9d95f7cbb5 /fs/pnode.h
parent88603b6dc419445847923fcb7fe5080067a30f98 (diff)
erofs/zmap.c: Fix incorrect offset calculation
Effective offset to add to length was being incorrectly calculated, which resulted in iomap->length being set to 0, triggering a WARN_ON in iomap_iter_done(). Fix that, and describe it in comments. This was reported as a crash by syzbot under an issue about a warning encountered in iomap_iter_done(), but unrelated to erofs. C reproducer: https://syzkaller.appspot.com/text?tag=ReproC&x=1037a6b2880000 Kernel config: https://syzkaller.appspot.com/text?tag=KernelConfig&x=e2021a61197ebe02 Dashboard link: https://syzkaller.appspot.com/bug?extid=a8e049cd3abd342936b6 Reported-by: syzbot+a8e049cd3abd342936b6@syzkaller.appspotmail.com Suggested-by: Gao Xiang <hsiangkao@linux.alibaba.com> Signed-off-by: Siddh Raman Pant <code@siddh.me> Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Link: https://lore.kernel.org/r/20221209102151.311049-1-code@siddh.me Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs/pnode.h')
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