watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz.9.1677:13555]
Modules linked in:
irq event stamp: 7096
hardirqs last  enabled at (7095): [<ffff800011b3c504>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last  enabled at (7095): [<ffff800011b3c504>] exit_to_kernel_mode+0xcc/0xfc arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (7096): [<ffff800011b3a64c>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (7096): [<ffff800011b3a64c>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (2392): [<ffff8000081ae3b4>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (2392): [<ffff8000081ae3b4>] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624
softirqs last disabled at (2243): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
CPU: 1 PID: 13555 Comm: syz.9.1677 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : csd_lock_wait kernel/smp.c:424 [inline]
pc : smp_call_function_many_cond+0xeac/0x1404 kernel/smp.c:998
lr : csd_lock_wait kernel/smp.c:424 [inline]
lr : smp_call_function_many_cond+0xec4/0x1404 kernel/smp.c:998
sp : ffff800020b47620
x29: ffff800020b47670 x28: dfff800000000000 x27: ffff800008a9fc9c
x26: ffff80001532d000 x25: 0000000000000011 x24: ffff800015330f40
x23: ffff00019f4353c0 x22: 1fffe00033e86a78 x21: ffff00019f41a548
x20: 0000000000000000 x19: ffff80001552a720 x18: 1fffe00033e8417e
x17: ffff80001532d000 x16: ffff8000082dcf38 x15: 0000000000000002
x14: 0000000000000001 x13: 1fffe00033e834a9 x12: 0000000000080000
x11: 000000000007ffff x10: ffff80002a580000 x9 : 0000000000000000
x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : ffff800008a9fc9c x3 : ffff80000840e400
x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
 __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:252 [inline]
 __cmpwait arch/arm64/include/asm/cmpxchg.h:278 [inline]
 csd_lock_wait kernel/smp.c:424 [inline]
 smp_call_function_many_cond+0xeac/0x1404 kernel/smp.c:998
 on_each_cpu_cond_mask+0x5c/0xc4 kernel/smp.c:1165
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x34/0x40 fs/buffer.c:1412
 kill_bdev block/bdev.c:75 [inline]
 set_blocksize+0x264/0x3f8 block/bdev.c:164
 sb_set_blocksize block/bdev.c:178 [inline]
 sb_min_blocksize+0xb8/0x18c block/bdev.c:194
 fat_fill_super+0x1540/0x3d24 fs/fat/inode.c:1650
 vfat_fill_super+0x40/0x54 fs/fat/namei_vfat.c:1205
 mount_bdev+0x264/0x35c fs/super.c:1443
 vfat_mount+0x44/0x58 fs/fat/namei_vfat.c:1212
 legacy_get_tree+0xd8/0x174 fs/fs_context.c:632
 vfs_get_tree+0x90/0x278 fs/super.c:1573
 do_new_mount+0x228/0x804 fs/namespace.c:3078
 path_mount+0x5ac/0xe6c fs/namespace.c:3408
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount fs/namespace.c:3606 [inline]
 __arm64_sys_mount+0x4a0/0x5a0 fs/namespace.c:3606
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585