Created attachment 859446 [details]
dmesg from crash>log
After upgrading the default kernel ("kernel-default") provided via regular
update from the official OpenSuse Leap 15.3 (Upstream SLES) repository from
5.3.18-150300.59.63.1-default to the newest Leap Standard Kernel
5.3.18-150300.59.68.1-default, I encountered already several Kernel Panics.
This could happened within an one day period 2 to 3 times, but also last time
it took 2 to 3 days, until it reoccurs.
An possibility to reproduce the issue step by step, I have not yet found, only
be using my PC.
crash>log unveiled a null pointer execption. Please see dmesg attachted.
Enabling KDUMP unveiled the following backtrace:
crash> bt
PID: 23800 TASK: ffff8d1b32ae8000 CPU: 0 COMMAND: "fstrim"
#0 [ffffb2134512f790] machine_kexec at ffffffffa7e6fe01
#1 [ffffb2134512f7e8] __crash_kexec at ffffffffa7f595fd
#2 [ffffb2134512f8b0] crash_kexec at ffffffffa7f5a4bd
#3 [ffffb2134512f8c8] oops_end at ffffffffa7e36d3f
#4 [ffffb2134512f8e8] no_context at ffffffffa7e82bbf
#5 [ffffb2134512f950] do_page_fault at ffffffffa7e83e40
#6 [ffffb2134512f980] page_fault at ffffffffa880130e
[exception RIP: bfq_bio_bfqg+37]
RIP: ffffffffa8277b55 RSP: ffffb2134512fa30 RFLAGS: 00010002
RAX: 000000000000001f RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff8d1b8f614e00 RSI: ffff8d1b7fd47200 RDI: ffff8d1b7fd47200
RBP: ffff8d1887ff0800 R8: ffff8d199aeb54b8 R9: ffff8d199aeb5488
R10: 0000000000000000 R11: ffff8d1ab7742e00 R12: ffff8d17c7744640
R13: ffff8d1887ff0800 R14: ffff8d1b7fd47200 R15: ffff8d1b8d91a894
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#7 [ffffb2134512fa40] bfq_bic_update_cgroup at ffffffffa8277e78
#8 [ffffb2134512fa78] bfq_bio_merge at ffffffffa826ee9f
#9 [ffffb2134512fad0] blk_mq_submit_bio at ffffffffa8248769
#10 [ffffb2134512fb58] submit_bio_noacct at ffffffffa823c343
#11 [ffffb2134512fbe8] submit_bio at ffffffffa823c3db
#12 [ffffb2134512fc38] submit_bio_wait at ffffffffa8234cc4
#13 [ffffb2134512fc78] blkdev_issue_discard at ffffffffa8243d20
#14 [ffffb2134512fd08] ext4_trim_fs at ffffffffc079a7ea [ext4]
#15 [ffffb2134512fe10] ext4_ioctl at ffffffffc0790ef6 [ext4]
#16 [ffffb2134512fef8] ksys_ioctl at ffffffffa80fadc2
#17 [ffffb2134512ff30] __x64_sys_ioctl at ffffffffa80fadf6
#18 [ffffb2134512ff38] do_syscall_64 at ffffffffa7e0538b
#19 [ffffb2134512ff50] entry_SYSCALL_64_after_hwframe at ffffffffa880008c
RIP: 00007f73ecd54c47 RSP: 00007ffc4e041c08 RFLAGS: 00000246
RAX: ffffffffffffffda RBX: 000055764b87c310 RCX: 00007f73ecd54c47
RDX: 00007ffc4e041c20 RSI: 00000000c0185879 RDI: 0000000000000003
RBP: 000055764b8788c0 R8: 000055764b87c310 R9: 0000000000000002
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc4e041d00
R13: 000055764b8788c0 R14: 0000000000000003 R15: 000055764b87a890
ORIG_RAX: 0000000000000010 CS: 0033 SS: 002b
According to the logfiles of the changed items of the last patch, there was a
patch added to address:
- bfq: Update cgroup information before merging bio (bsc#1197926).
Searching in the internet "bfq_bic_update_cgroup+0x28/0x1b0 core dump opensuse"
I also found:
https://lkml.kernel.org/linux-block/20220330124255.24581-2-jack@suse.cz/T/
There at least in the same stack changes have been done in the same area.
@@ -2457,10 +2457,17 @@ static bool bfq_bio_merge(struct request_queue *q,
struct bio *bio,
+ bfq_bic_update_cgroup(bic, bio);
Maybe bio is not fully initialized?
Maybe my refernece is wrong, but it is remarkable, that at least the kernel
post contains a change in the same stack.
As this is my first post, I am not quite sure what other information might be
helpfull here. Please ask, if you will need further information.
Thanks already for taking this issue into account. And for your openSuse.
Best regards
cyp