Subject: Re: next: kernel BUG at drivers/virtio/virtio.c:122!

From: "Michael S. Tsirkin" <[email-masked]>
Date: Tue, 20 Dec 2022 04:49:51 -0500

On Tue, Dec 20, 2022 at 02:51:54PM +0530, Naresh Kamboju wrote:
> The qemu-x86_64 and qemu-arm64 boot failed with Linux next-20221220 tag.
> It is always reproducible with gcc-11/ gcc-12 and clang tool chains.
> 
> Reported-by: Linux Kernel Functional Testing <[email-masked]>
> 
> <6>[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x000f0510]
> <5>[    0.000000] Linux version 6.1.0-next-20221220 (tuxmake@tuxmake)
> (Debian clang version 16.0.0
> (++20221218072110+9c1b82599dac-1~exp1~20221218072217.501), Debian LLD
> 16.0.0) #1 SMP PREEMPT @1671498176
> <5>[    0.000000] random: crng init done
> <6>[    0.000000] Machine model: linux,dummy-virt
> ....
> <6>[    3.571098] loop: module loaded
> <6>[    3.573410] virtio_blk virtio0: 1/0/0 default/read/poll queues
> <5>[    3.578816] virtio_blk virtio0: [vda] 2816420 512-byte logical
> blocks (1.44 GB/1.34 GiB)
> <4>[    3.581234] ------------[ cut here ]------------
> <2>[    3.581595] kernel BUG at drivers/virtio/virtio.c:122!
> <0>[    3.582906] Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
> <4>[    3.583672] Modules linked in:
> <4>[    3.584905] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
> 6.1.0-next-20221220 #1
> <4>[    3.585801] Hardware name: linux,dummy-virt (DT)
> <4>[    3.586591] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT
> -SSBS BTYPE=--)
> <4>[    3.587349] pc : virtio_check_driver_offered_feature+0x60/0x6c
> <4>[    3.588613] lr : virtblk_probe+0x7cc/0x8f0
> <4>[    3.588915] sp : ffff80000802b840
> <4>[    3.589314] x29: ffff80000802b850 x28: 0000000000000000 x27:
> 0000000000000001
> <4>[    3.590509] x26: 0000000000000001 x25: 0000000000000200 x24:
> ffff0000c1699b00
> <4>[    3.590832] x23: 00000000000000fe x22: ffff0000c0313c30 x21:
> ffff0000c0313c00
> <4>[    3.591568] x20: ffff0000c02f4080 x19: 0000000000000000 x18:
> ffffffffffffffff
> <4>[    3.592056] x17: 00000000ffffffea x16: 00000000fffffffe x15:
> 0000000000000004
> <4>[    3.592632] x14: 0000000000000fff x13: ffff800008028000 x12:
> ffff80000802c000
> <4>[    3.593157] x11: 000000000000000f x10: 000000000000000f x9 :
> ffffae66eee314d8
> <4>[    3.594048] x8 : 0000000000000000 x7 : 3631383837352e33 x6 :
> 202020205b3e353c
> <4>[    3.594429] x5 : 0000000000000001 x4 : 0000000000000000 x3 :
> ffff80000802b780
> <4>[    3.594956] x2 : ffff80000802b6f8 x1 : 0000000000000011 x0 :
> ffff0000c02f4080
> <4>[    3.595811] Call trace:
> <4>[    3.596120]  virtio_check_driver_offered_feature+0x60/0x6c
> <4>[    3.596632]  virtio_dev_probe+0x274/0x320
> <4>[    3.597064]  really_probe+0x178/0x418
> <4>[    3.597547]  __driver_probe_device+0x120/0x188
> <4>[    3.597820]  driver_probe_device+0x48/0x22c
> <4>[    3.598189]  __driver_attach+0xf8/0x250
> <4>[    3.598656]  bus_for_each_dev+0x8c/0xd8
> <4>[    3.599151]  driver_attach+0x30/0x3c
> <4>[    3.599321]  bus_add_driver+0x11c/0x22c
> <4>[    3.599684]  driver_register+0x84/0x120
> <4>[    3.600175]  register_virtio_driver+0x38/0x48
> <4>[    3.600575]  virtio_blk_init+0x6c/0xb4
> <4>[    3.600759]  do_one_initcall+0xe0/0x2f8
> <4>[    3.601197]  do_initcall_level+0xa8/0x150
> <4>[    3.601703]  do_initcalls+0x60/0xa0
> <4>[    3.601892]  do_basic_setup+0x28/0x34
> <4>[    3.602229]  kernel_init_freeable+0x100/0x178
> <4>[    3.602706]  kernel_init+0x2c/0x1b4
> <4>[    3.603162]  ret_from_fork+0x10/0x20
> <0>[    3.604398] Code: 540000a0 91001129 f1000508 54ffff61 (d4210000)
> <4>[    3.606108] ---[ end trace 0000000000000000 ]---
> <6>[    3.606714] note: swapper/0[1] exited with preempt_count 1
> <0>[    3.608155] Kernel panic - not syncing: Attempted to kill init!
> exitcode=0x0000000b
> <2>[    3.609173] SMP: stopping secondary CPUs
> <0>[    3.610506] Kernel Offset: 0x2e66e4800000 from 0xffff800008000000
> <0>[    3.610970] PHYS_OFFSET: 0x40000000
> <0>[    3.611428] CPU features: 0x00000,003a612f,cd22773f
> <0>[    3.612277] Memory Limit: none
> <0>[    3.613192] ---[ end Kernel panic - not syncing: Attempted to
> kill init! exitcode=0x0000000b ]---
> 
> Ref Links,
> https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20221220/testrun/13764099/suite/log-parser-test/test/check-kernel-bug/details/
> https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20221220/testrun/13766814/suite/boot/test/clang-nightly-lkftconfig/details/
> https://storage.tuxsuite.com/public/linaro/lkft/builds/2J9l3qxSBmPWVa1S2uWn0Xuwl1J/config
> 
> 
> --
> Linaro LKFT
> https://lkft.linaro.org

Could you post a bit more detail pls?
- qemu version and command line
- .config
- compiler / compiler flags if any

Thanks!

-- 
MST