[Cluster-devel] A list of kernel panic bugs in gfs2 linux 4.18 kernel module found by fuzzing

[Bob Peterson <rpeterso@redhat.com>]

----- Original Message -----
> Dear GFS2 developers,
> 
> Here are a list of bugs I found in gfs2 Linux 4.18 kernel module by local
> fuzzing test, please check the followings:
> 
> 200265	BUG() in gfs2_unpin() when writing to a file on a corrupted gfs2 file
> system
> https://bugzilla.kernel.org/show_bug.cgi?id=200265
> 
> 200263	Invalid function pointer invoked when writing to a file on corrupted
> gfs2 filesystem
> https://bugzilla.kernel.org/show_bug.cgi?id=200263
> 
> 200261	BUG() in __gfs2_punch_hole() when mounting a corrupted gfs2 image
> https://bugzilla.kernel.org/show_bug.cgi?id=200261
> 
> 200259	Invalid function pointer called when writing to a corrupted gfs2 image
> https://bugzilla.kernel.org/show_bug.cgi?id=200259
> 
> 200257	Kernel panic when invoking setxattr on a file in the corrupted gfs2
> image
> https://bugzilla.kernel.org/show_bug.cgi?id=200257
> 
> 200253	Uninitialized stack variable misused in rgblk_free()
> https://bugzilla.kernel.org/show_bug.cgi?id=200253
> 
> 200251	BUG() triggered in gfs2_write_calc_reserv() when mounting and
> un-mounting a corrupted gfs2 image
> https://bugzilla.kernel.org/show_bug.cgi?id=200251
> 
> 200249	NULL pointer dereference in gfs2_evict_inode() when mounting a
> corrupted gfs2 image
> https://bugzilla.kernel.org/show_bug.cgi?id=200249
> 
> 200245	Kernel panic in fillup_metapath() when calling stat() on the file in a
> corrupted gfs2 file system
> https://bugzilla.kernel.org/show_bug.cgi?id=200245
> 
> 200247	Invalid function pointer invoked when calling mmap() on a file in the
> corrupted gfs2 file system
> https://bugzilla.kernel.org/show_bug.cgi?id=200247
> 
> 200237	BUG() triggered in gfs2_iomap_get() when mounting a corrupted gfs2
> image
> https://bugzilla.kernel.org/show_bug.cgi?id=200237
> 
> 200235	Out-of-bound access in gfs2_read_sb() when mounting a corrupted gfs2
> image
> https://bugzilla.kernel.org/show_bug.cgi?id=200235
> 
> 200233	NULL pointer dereference in set_rgrp_preferences() when mounting a
> corrupted gfs2 image
> https://bugzilla.kernel.org/show_bug.cgi?id=200233
> 
> 200231	stack overflow in gfs2_block_map() when mounting a corrupted gfs2
> image
> https://bugzilla.kernel.org/show_bug.cgi?id=200231
> 
> You can find the corrupt image leading to kernel panic and related kernel
> message in the Bugzilla links.
> Among them, 200263, 200259 and 200247 may have the same root cause, but I am
> not sure.
> I would like to provide any further help to debug and fix the bugs. I am also
> willing to test the patch.
> 
> Thanks,
> Wen
Hi,

Thanks, Wen. Andy Price is doing most of the work on gfs2-utils and fsck.gfs2
these days. Adding him.

Regards,

Bob Peterson
Red Hat File Systems