Re: queue-5.10: Panic on shutdown at platform_shutdown+0x9

[Greg KH <gregkh@linuxfoundation.org>]

On Thu, Feb 06, 2025 at 01:31:42PM -0500, Chuck Lever wrote:
> Hi -
> 
> For the past 3-4 days, NFSD CI runs on queue-5.10.y have been failing. I
> looked into it today, and the test guest fails to reboot because it
> panics during a reboot shutdown:
> 
> [  146.793087] BUG: unable to handle page fault for address:
> ffffffffffffffe8
> [  146.793918] #PF: supervisor read access in kernel mode
> [  146.794544] #PF: error_code(0x0000) - not-present page
> [  146.795172] PGD 3d5c14067 P4D 3d5c15067 PUD 3d5c17067 PMD 0
> [  146.795865] Oops: 0000 [#1] SMP NOPTI
> [  146.796326] CPU: 3 PID: 1 Comm: systemd-shutdow Not tainted
> 5.10.234-g99349f441fe1 #1
> [  146.797256] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
> 1.16.3-2.fc40 04/01/2014
> [  146.798267] RIP: 0010:platform_shutdown+0x9/0x20
> [  146.798838] 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 ff e0 0f 1f 00 c3 cc cc cc
> [  146.801012] RSP: 0018:ff7f86f440013de0 EFLAGS: 00010246
> [  146.801651] RAX: 0000000000000000 RBX: ff4f0637469df418 RCX:
> 0000000000000000
> [  146.802500] RDX: 0000000000000001 RSI: ff4f0637469df418 RDI:
> ff4f0637469df410
> [  146.803350] RBP: ffffffffb2e79220 R08: ff4f0637469dd808 R09:
> ffffffffb2c5c698
> [  146.804203] R10: 0000000000000000 R11: 0000000000000000 R12:
> ff4f0637469df410
> [  146.805059] R13: ff4f0637469df490 R14: 00000000fee1dead R15:
> 0000000000000000
> [  146.805909] FS:  00007f4e7ecc6b80(0000) GS:ff4f063aafd80000(0000)
> knlGS:0000000000000000
> [  146.806866] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [  146.807558] CR2: ffffffffffffffe8 CR3: 000000010ecb2001 CR4:
> 0000000000771ee0
> [  146.808412] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [  146.809262] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
> 0000000000000400
> [  146.810109] PKRU: 55555554
> [  146.810460] Call Trace:
> [  146.810791]  ? __die_body.cold+0x1a/0x1f
> [  146.811282]  ? no_context.constprop.0+0xf8/0x2f0
> [  146.811854]  ? exc_page_fault+0xc5/0x150
> [  146.812342]  ? asm_exc_page_fault+0x1e/0x30
> [  146.812862]  ? platform_shutdown+0x9/0x20
> [  146.813362]  device_shutdown+0x158/0x1c0
> [  146.813853]  __do_sys_reboot.cold+0x2f/0x5b
> [  146.814370]  ? vfs_writev+0x9b/0x110
> [  146.814824]  ? do_writev+0x57/0xf0
> [  146.815254]  do_syscall_64+0x30/0x40
> [  146.815708]  entry_SYSCALL_64_after_hwframe+0x67/0xd1
> 
> Let me know how to further assist.

Bisect?