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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 -- Chuck Lever