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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? >>> >>> First bad commit: >>> >>> commit a06b4817f3d20721ae729d8b353457ff9fe6ff9c >>> Author: Uwe Kleine-König >>> AuthorDate: Thu Nov 19 13:46:11 2020 +0100 >>> Commit: Sasha Levin >>> CommitDate: Tue Feb 4 13:04:31 2025 -0500 >>> >>> driver core: platform: use bus_type functions >>> >>> [ Upstream commit 9c30921fe7994907e0b3e0637b2c8c0fc4b5171f ] >>> >>> This works towards the goal mentioned in 2006 in commit 594c8281f905 >>> ("[PATCH] Add bus_type probe, remove, shutdown methods."). >>> >>> The functions are moved to where the other bus_type functions are >>> defined and renamed to match the already established naming scheme. >>> >>> Signed-off-by: Uwe Kleine-König >>> Link: >>> https://lore.kernel.org/r/20201119124611.2573057-3-u.kleine-koenig@pengutronix.de >>> Signed-off-by: Greg Kroah-Hartman >>> Stable-dep-of: bf5821909eb9 ("mtd: hyperbus: hbmc-am654: fix an OF >>> node reference leak") >>> Signed-off-by: Sasha Levin >>> >> >> Hi Greg, I still see crashes on shutdown 100% of the time on queue/5.10 >> kernels. Is there a plan to revert this commit? > > Yes, I haven't had the cycles to get to looking at the 5.10 queue in a > while, which is why I haven't pushed out new 5.10-rc kernels. > > I'll get to it "soon". Hopefully. Ugh. Understood. Thanks! -- Chuck Lever