syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz.3.15:4381]
Modules linked in:
irq event stamp: 99152
hardirqs last  enabled at (99151): [<ffff80001216b330>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last  enabled at (99151): [<ffff80001216b330>] exit_to_kernel_mode+0xe8/0x118 arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (99152): [<ffff80001216900c>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (99152): [<ffff80001216900c>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (94520): [<ffff8000081c808c>] softirq_handle_end kernel/softirq.c:414 [inline]
softirqs last  enabled at (94520): [<ffff8000081c808c>] handle_softirqs+0xb84/0xd58 kernel/softirq.c:599
softirqs last disabled at (94475): [<ffff800008020174>] __do_softirq+0x14/0x20 kernel/softirq.c:605
CPU: 1 PID: 4381 Comm: syz.3.15 Not tainted 6.1.98-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : csd_lock_wait kernel/smp.c:424 [inline]
pc : smp_call_function_many_cond+0x20f8/0x32b8 kernel/smp.c:998
lr : csd_lock_wait kernel/smp.c:424 [inline]
lr : smp_call_function_many_cond+0x2110/0x32b8 kernel/smp.c:998
sp : ffff80001e6e74a0
x29: ffff80001e6e7810 x28: 1fffe00036871a38 x27: ffff800015861130
x26: ffff80001e6e7608 x25: ffff0001b4372348 x24: 0000000000000000
x23: dfff800000000000 x22: ffff0001b438d1c8 x21: 0000000000000011
x20: ffff80001e6e7600 x19: ffff0001b438d1c0 x18: ffff80001e6e7660
x17: ffff8000188f0000 x16: ffff80000830560c x15: 0000000000000002
x14: 0000000000000406 x13: ffff0000d1271bc0 x12: 0000000000040000
x11: 000000000003ffff x10: ffff80002153a000 x9 : 0000000000000000
x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : ffff800008b34f38 x3 : ffff800008451c9c
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+0x20f8/0x32b8 kernel/smp.c:998
 on_each_cpu_cond_mask+0x5c/0xc4 kernel/smp.c:1166
 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]
 blkdev_flush_mapping+0x128/0x280 block/bdev.c:664
 blkdev_put_whole block/bdev.c:695 [inline]
 blkdev_put+0x464/0x6e0 block/bdev.c:955
 kill_block_super+0x98/0xdc fs/super.c:1462
 gfs2_kill_sb+0xc0/0xd4
 deactivate_locked_super+0xac/0x124 fs/super.c:332
 get_tree_bdev+0x380/0x54c fs/super.c:1357
 gfs2_get_tree+0x54/0x1b4 fs/gfs2/ops_fstype.c:1330
 vfs_get_tree+0x90/0x274 fs/super.c:1562
 do_new_mount+0x278/0x8fc fs/namespace.c:3051
 path_mount+0x590/0xe5c fs/namespace.c:3381
 do_mount fs/namespace.c:3394 [inline]
 __do_sys_mount fs/namespace.c:3602 [inline]
 __se_sys_mount fs/namespace.c:3579 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3579
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 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