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| author | Gao Xiang <hsiangkao@linux.alibaba.com> | 2024-11-15 07:49:05 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2024-11-18 18:50:13 +0800 |
| commit | 3a23787ca8756920d65fda39f41353a4be1d1642 (patch) | |
| tree | 73dcc6a9123bcfcf889ecdaefb58d96ed57a4e26 /tools/perf/scripts/python/event_analyzing_sample.py | |
| parent | 90655ee279b299c33dc51be87787b54222d3d2fb (diff) | |
erofs: fix file-backed mounts over FUSE
syzbot reported a null-ptr-deref in fuse_read_args_fill:
fuse_read_folio+0xb0/0x100 fs/fuse/file.c:905
filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2367
do_read_cache_folio+0x263/0x5c0 mm/filemap.c:3825
read_mapping_folio include/linux/pagemap.h:1011 [inline]
erofs_bread+0x34d/0x7e0 fs/erofs/data.c:41
erofs_read_superblock fs/erofs/super.c:281 [inline]
erofs_fc_fill_super+0x2b9/0x2500 fs/erofs/super.c:625
Unlike most filesystems, some network filesystems and FUSE need
unavoidable valid `file` pointers for their read I/Os [1].
Anyway, those use cases need to be supported too.
[1] https://docs.kernel.org/filesystems/vfs.html
Reported-by: syzbot+0b1279812c46e48bb0c1@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/r/6727bbdf.050a0220.3c8d68.0a7e.GAE@google.com
Fixes: fb176750266a ("erofs: add file-backed mount support")
Tested-by: syzbot+0b1279812c46e48bb0c1@syzkaller.appspotmail.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20241114234905.1873723-1-hsiangkao@linux.alibaba.com
Diffstat (limited to 'tools/perf/scripts/python/event_analyzing_sample.py')
0 files changed, 0 insertions, 0 deletions