On Wed, May 3, 2023 at 2:06 PM Dave Chinner <david@xxxxxxxxxxxxx> wrote: > > Hi folks, > > fstests running shared/032 on XFS with a default mkfs and mount > config causes a panic in the block layer when userspace is operating > directly on the block device like this: > > SECTION -- xfs > FSTYP -- xfs (debug) > PLATFORM -- Linux/x86_64 test3 6.3.0-dgc+ #1792 SMP PREEMPT_DYNAMIC Wed May 3 15:20:20 AEST 2023 > MKFS_OPTIONS -- -f -m rmapbt=1 /dev/pmem1 > MOUNT_OPTIONS -- -o dax=never -o context=system_u:object_r:root_t:s0 /dev/pmem1 /mnt/scratch > > .... > > [ 56.070695] run fstests shared/032 at 2023-05-03 15:21:55 > [ 56.768890] BTRFS: device fsid 355df15c-7bc5-49b0-9b5d-dc25ce855a9d devid 1 transid 6 /dev/pmem1 scanned by mkfs.btrfs (5836) > [ 57.285879] pmem1: p1 > [ 57.301845] BUG: kernel NULL pointer dereference, address: 00000000000000a8 > [ 57.304562] #PF: supervisor read access in kernel mode > [ 57.306499] #PF: error_code(0x0000) - not-present page > [ 57.308414] PGD 0 P4D 0 > [ 57.309401] Oops: 0000 [#1] PREEMPT SMP > [ 57.310876] CPU: 3 PID: 4478 Comm: (udev-worker) Not tainted 6.3.0-dgc+ #1792 > [ 57.313517] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 > [ 57.317089] RIP: 0010:blk_mq_sched_bio_merge+0x7b/0x100 Hi Dave, It is fixed by: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-6.4/block&id=38c8e3dfb2a1be863b7f5aad7755d5e9727da8a5 Thanks, Ming
