rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8735/1:b..l P8736/1:b..l
(detected by 1, t=10502 jiffies, g=41005, q=42 ncpus=2)
task:syz.7.1402 state:R running task stack:26256 pid:8736 ppid:7095 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
preempt_schedule_notrace+0xd9/0x120 kernel/sched/core.c:6825
preempt_schedule_notrace_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
rcu_is_watching+0x76/0xa0 kernel/rcu/tree.c:722
trace_lock_acquire include/trace/events/lock.h:24 [inline]
lock_acquire+0xe2/0x4a0 kernel/locking/lockdep.c:5761
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
nl80211_netlink_notify+0x97/0x800 net/wireless/nl80211.c:19780
notifier_call_chain kernel/notifier.c:87 [inline]
blocking_notifier_call_chain+0x103/0x1b0 kernel/notifier.c:382
netlink_release+0x1115/0x19b0 net/netlink/af_netlink.c:766
__sock_release net/socket.c:654 [inline]
sock_close+0xbf/0x210 net/socket.c:1400
__fput+0x20a/0x8b0 fs/file_table.c:320
task_work_run+0x1d0/0x260 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:180
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
__syscall_exit_to_user_mode_work kernel/entry/common.c:295 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:306
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3dd119e559
RSP: 002b:00007fffbc6cbfa8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fffbc6cc090 RCX: 00007f3dd119e559
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000003a6c7 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2d120000 R11: 0000000000000246 R12: 00007fffbc6cc0d0
R13: 00007f3dd1425fac R14: 000000000003a703 R15: 00007f3dd1425fa0
task:sed state:R running task stack:24464 pid:8735 ppid:8734 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6875
irqentry_exit+0x63/0x70 kernel/entry/common.c:442
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
RIP: 0010:check_kcov_mode kernel/kcov.c:189 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:241 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp8+0x32/0x80 kernel/kcov.c:289
Code: d4 26 80 7e 65 8b 15 d5 26 80 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 1c 16 00 00 00 74 4e 8b 91 f8 15 00 00 <83> fa 03 75 43 48 8b 91 00 16 00 00 44 8b 89 fc 15 00 00 49 c1 e1
RSP: 0018:ffffc900062276f8 EFLAGS: 00000246
RAX: ffffffff8a218f10 RBX: 0000000000000010 RCX: ffff88802b661e00
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000002
RBP: ffffc900062278b0 R08: ffff88802b661e00 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff8bb21201 R14: 0000000000000000 R15: 0000000000000002
mas_validate_gaps lib/maple_tree.c:6974 [inline]
mt_validate+0x3050/0x4c60 lib/maple_tree.c:7246
validate_mm_mt+0xd9/0x420 mm/mmap.c:295
validate_mm+0xe1/0x2e0 mm/mmap.c:332
mmap_region+0x854/0x1c50 mm/mmap.c:2922
do_mmap+0x9ce/0x10d0 mm/mmap.c:1436
vm_mmap_pgoff+0x1c1/0x2d0 mm/util.c:520
ksys_mmap_pgoff+0x4bf/0x720 mm/mmap.c:1482
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f14c7d4d242
RSP: 002b:00007ffc1d584cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f14c7a20000 RCX: 00007f14c7d4d242
RDX: 0000000000000003 RSI: 0000000000002000 RDI: 00007f14c7a20000
RBP: 0000000000000812 R08: 0000000000000003 R09: 000000000005f000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffc1d584d98
R13: 00007f14c7a2c6b0 R14: 00007ffc1d585110 R15: 00000fff83ab099e
rcu: rcu_preempt kthread starved for 10500 jiffies! g41005 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:25952 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
schedule+0xb9/0x180 kernel/sched/core.c:6639
schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x303/0x1350 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 8743 Comm: syz.8.1401 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline]
RIP: 0010:smp_call_function_many_cond+0x114d/0x1250 kernel/smp.c:998
Code: 83 e6 01 31 ff e8 53 02 0b 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 0a e8 df fe 0a 00 e9 34 ff ff ff f3 90 41 0f b6 04 1c <84> c0 75 14 41 f7 07 01 00 00 00 0f 84 17 ff ff ff e8 bd fe 0a 00
RSP: 0018:ffffc9000c957ac0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc900058e9000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000c957c10 R08: ffff8880b8d3bd97 R09: 1ffff110171a77b2
R10: dffffc0000000000 R11: ffffed10171a77b3 R12: 1ffff110171885f5
R13: ffff8880b8d3bd80 R14: 0000000000000000 R15: ffff8880b8c42fa8
FS: 00007f67a9cec6c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f821ff8 CR3: 000000005a3f0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
clock_was_set+0x7ee/0x8d0 kernel/time/hrtimer.c:988
do_settimeofday64+0x597/0x740 kernel/time/timekeeping.c:1345
__do_sys_clock_settime kernel/time/posix-timers.c:1125 [inline]
__se_sys_clock_settime kernel/time/posix-timers.c:1113 [inline]
__x64_sys_clock_settime+0x25a/0x2a0 kernel/time/posix-timers.c:1113
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f67a8d9e559
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:00007f67a9cec028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f67a9025fa0 RCX: 00007f67a8d9e559
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007f67a8e358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67a9026038 R14: 00007f67a9025fa0 R15: 00007ffe0fc9c678