[f2fs-dev] [Bug 220575] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000

[bugzilla-daemon--- via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>]

https://bugzilla.kernel.org/show_bug.cgi?id=220575

Chao Yu (chao@kernel.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED

--- Comment #12 from Chao Yu (chao@kernel.org) ---
Hi JY,

I've figured out a reproducer as below:

1. mkdir /mnt/f2fs/enc & encrypt /mnt/f2fs/enc

2. Run below script in shell #1:
for ((i=1;i>0;i++)) do xfs_io -f /mnt/f2fs/enc/file \
-c "pwrite 0 32k" -c "fdatasync"

3. Run below script in shell #2:
for ((i=1;i>0;i++)) do xfs_io -f /mnt/f2fs/enc/file \
-c "pwrite 0 32k" -c "fdatasync"

Now, testing below fix.

https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?h=bugfix/syzbot&id=1d024fd4c6fed3767f063db79746bcd2d0be49d1

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