platform_shutdown crasher reaches LTS v5.10

platform_shutdown crasher reaches LTS v5.10

[Chuck Lever]

Howdy -

My queue/5.10 CI test runners have hit this crash on shutdown:

[   42.547410] RIP: 0010:platform_shutdown+0x9/0x20
[   42.547955] Code: b7 46 08 c3 cc cc cc cc 31 c0 83 bf a8 02 00 00 ff
75 ec c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 47
68 <48> 8b 40 e8 48 85 c0 74 09 48 83 ef 10 e9 35 2c 80 00 c3 cc cc cc
[   42.550016] RSP: 0018:ffffc2ff80013de0 EFLAGS: 00010246
[   42.550630] RAX: 0000000000000000 RBX: ffff9e6805d2ec18 RCX:
0000000000000000
[   42.551444] RDX: 0000000000000001 RSI: ffff9e6805d2ec18 RDI:
ffff9e6805d2ec10
[   42.552263] RBP: ffffffff9be79420 R08: ffff9e6805d2f408 R09:
ffffffff9bc5c698
[   42.553081] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff9e6805d2ec10
[   42.553900] R13: ffff9e6805d2ec90 R14: 00000000fee1dead R15:
0000000000000000
[   42.554717] FS:  00007f05a6960b80(0000) GS:ffff9e6b6fc00000(0000)
knlGS:0000000000000000
[   42.555633] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.556291] CR2: ffffffffffffffe8 CR3: 000000010960a006 CR4:
0000000000370ef0
[   42.557105] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[   42.557919] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[   42.558733] Call Trace:
[   42.559044]  device_shutdown+0x15b/0x1c0
[   42.559512]  __do_sys_reboot.cold+0x2f/0x5b
[   42.560015]  ? vfs_writev+0x9b/0x110
[   42.560444]  ? do_writev+0x57/0xf0
[   42.560859]  do_syscall_64+0x33/0x40
[   42.561289]  entry_SYSCALL_64_after_hwframe+0x67/0xd1


It's likely due to this recently applied commit:

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?h=queue/5.10&id=09dc7a2708efc8eaa3efcbb1d50b2d8232b41114

Maybe commit 46e85af0cc53 ("driver core: platform: don't oops in
platform_shutdown() on unbound devices") fixes this issue, but I didn't
test it.


-- 
Chuck Lever

Re: platform_shutdown crasher reaches LTS v5.10

[Greg KH]

On Mon, Apr 28, 2025 at 02:51:44PM -0400, Chuck Lever wrote:
> Howdy -
> 
> My queue/5.10 CI test runners have hit this crash on shutdown:
> 
> [   42.547410] RIP: 0010:platform_shutdown+0x9/0x20
> [   42.547955] Code: b7 46 08 c3 cc cc cc cc 31 c0 83 bf a8 02 00 00 ff
> 75 ec c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 47
> 68 <48> 8b 40 e8 48 85 c0 74 09 48 83 ef 10 e9 35 2c 80 00 c3 cc cc cc
> [   42.550016] RSP: 0018:ffffc2ff80013de0 EFLAGS: 00010246
> [   42.550630] RAX: 0000000000000000 RBX: ffff9e6805d2ec18 RCX:
> 0000000000000000
> [   42.551444] RDX: 0000000000000001 RSI: ffff9e6805d2ec18 RDI:
> ffff9e6805d2ec10
> [   42.552263] RBP: ffffffff9be79420 R08: ffff9e6805d2f408 R09:
> ffffffff9bc5c698
> [   42.553081] R10: 0000000000000000 R11: 0000000000000000 R12:
> ffff9e6805d2ec10
> [   42.553900] R13: ffff9e6805d2ec90 R14: 00000000fee1dead R15:
> 0000000000000000
> [   42.554717] FS:  00007f05a6960b80(0000) GS:ffff9e6b6fc00000(0000)
> knlGS:0000000000000000
> [   42.555633] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   42.556291] CR2: ffffffffffffffe8 CR3: 000000010960a006 CR4:
> 0000000000370ef0
> [   42.557105] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [   42.557919] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
> 0000000000000400
> [   42.558733] Call Trace:
> [   42.559044]  device_shutdown+0x15b/0x1c0
> [   42.559512]  __do_sys_reboot.cold+0x2f/0x5b
> [   42.560015]  ? vfs_writev+0x9b/0x110
> [   42.560444]  ? do_writev+0x57/0xf0
> [   42.560859]  do_syscall_64+0x33/0x40
> [   42.561289]  entry_SYSCALL_64_after_hwframe+0x67/0xd1
> 
> 
> It's likely due to this recently applied commit:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?h=queue/5.10&id=09dc7a2708efc8eaa3efcbb1d50b2d8232b41114
> 
> Maybe commit 46e85af0cc53 ("driver core: platform: don't oops in
> platform_shutdown() on unbound devices") fixes this issue, but I didn't
> test it.

Thanks, I'll go fix this up again.

greg k-h