watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.8.30604:518]
Modules linked in:
CPU: 0 PID: 518 Comm: syz.8.30604 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:154 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x60 kernel/kcov.c:188
Code: 48 8b 3d 4c cf 5e 05 48 89 de e8 84 ef 39 00 5b 5d c3 00 55 48 89 e5 48 8b 45 08 65 48 8b 0d b0 b6 9d 7e 65 8b 15 b5 b6 9d 7e <f7> c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 dc 0a 00 00
RSP: 0018:ffffc9000171fc60 EFLAGS: 00000287
RAX: ffffffff8182c58b RBX: ffff88811b6bc810 RCX: ffff888150c10000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88811b6bc800
RBP: ffffc9000171fc60 R08: ffffffff86c38ba7 R09: 1ffffffff0d87174
R10: dffffc0000000000 R11: fffffbfff0d87175 R12: ffff88811b6bcbe8
R13: ffffffff86606c38 R14: ffff88811b6ba810 R15: ffff88811b6bc800
FS:  000055556ac10500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7c1caa6e70 CR3: 000000012033b000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000200000001280 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 pmu_filter_match kernel/events/core.c:2314 [inline]
 event_filter_match kernel/events/core.c:2326 [inline]
 perf_iterate_sb_cpu kernel/events/core.c:7532 [inline]
 perf_iterate_sb+0x5fb/0xd50 kernel/events/core.c:7564
 perf_event_bpf_event+0x42d/0x540 kernel/events/core.c:8890
 __bpf_prog_put kernel/bpf/syscall.c:1773 [inline]
 bpf_prog_put+0x7a/0x3a0 kernel/bpf/syscall.c:1783
 bpf_prog_release+0x3b/0x40 kernel/bpf/syscall.c:1791
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:175
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:202
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:277
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f04cc708b19
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd0a885bd8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f04cc990da0 RCX: 00007f04cc708b19
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f04cc990da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f04cc990cb0 R11: 0000000000000246 R12: 00000000002c672f
R13: 00007f04cc98f09c R14: 00000000002c647c R15: 00007f04cc98f090
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 28686 Comm: kworker/1:35 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: rcu_gp process_srcu
RIP: 0010:srcu_readers_lock_idx kernel/rcu/srcutree.c:258 [inline]
RIP: 0010:srcu_readers_active_idx_check kernel/rcu/srcutree.c:324 [inline]
RIP: 0010:try_check_zero+0x1fd/0x350 kernel/rcu/srcutree.c:704
Code: c1 e8 03 42 80 3c 30 00 74 08 4c 89 e7 e8 cb 7b 4d 00 4d 03 3c 24 48 8b 45 a8 4d 8d 24 c7 4c 89 e0 48 c1 e8 03 42 80 3c 30 00 <74> 08 4c 89 e7 e8 a9 7b 4d 00 49 03 1c 24 44 89 ef 48 c7 c6 00 84
RSP: 0018:ffffc9000174fbc8 EFLAGS: 00000246
RAX: 1ffff1103ee08e99 RBX: 0000000000000000 RCX: ffff88815381e400
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000
RBP: ffffc9000174fc30 R08: ffffc9000174fbc7 R09: 1ffff920002e9f78
R10: dffffc0000000000 R11: fffff520002e9f79 R12: ffff8881f70474c8
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8881f70474c0
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7c1caed1d6 CR3: 000000011a60b000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 srcu_advance_state kernel/rcu/srcutree.c:1215 [inline]
 process_srcu+0x1bd/0xca0 kernel/rcu/srcutree.c:1310
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298