rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=65d4/1/0x4000000000000000 softirq=49756/49757 fqs=70
rcu: (detected by 0, t=10502 jiffies, g=50457, q=399 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5827 Comm: syz-executor Not tainted 6.12.0-next-20241119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: 8b 3d 54 19 8d 0c 48 89 de 5b e9 a3 d6 5e 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 00 d6 03 00 65 8b 15 a0 5c 64 7e 81 e2 00 01 ff 00
RSP: 0018:ffffc90000a18d38 EFLAGS: 00000002
RAX: ffffffff818cd673 RBX: ffff8880b872c9c8 RCX: ffffffff818cd630
RDX: ffff888034778000 RSI: ffffffff8c5e8700 RDI: ffffffff8c5e86c0
RBP: ffffc90000a18ea0 R08: ffffffff818cd656 R09: 1ffffffff2030b7e
R10: dffffc0000000000 R11: fffffbfff2030b7f R12: 1ffff110170e593b
R13: 0000000000000001 R14: ffff88805f3b0340 R15: ffff8880b872c880
FS: 000055556b01d500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1f6b37a8c CR3: 0000000063640000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_hrtimer_expire_exit include/trace/events/timer.h:306 [inline]
__run_hrtimer kernel/time/hrtimer.c:1742 [inline]
__hrtimer_run_queues+0x643/0xd50 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__kernel_text_address+0x5/0x40 kernel/extable.c:78
Code: c3 48 c7 c7 40 1b 18 90 e8 28 53 a0 00 eb b5 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 53 <48> 89 fb e8 43 00 00 00 85 c0 0f 95 c0 48 c7 c1 00 40 77 91 48 39
RSP: 0018:ffffc900040978f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90004097968 RCX: 0000000080000000
RDX: dffffc0000000000 RSI: ffffc90004090000 RDI: ffffffff820a38c6
RBP: ffffc900040979b0 R08: ffffc90004097cd0 R09: 0000000000000000
R10: ffffc90004097970 R11: fffff52000812f30 R12: ffff888034778000
R13: ffffffff818b35d0 R14: dffffc0000000000 R15: 1ffff92000812f2d
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xfd/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4104 [inline]
slab_alloc_node mm/slub.c:4153 [inline]
kmem_cache_alloc_lru_noprof+0x1dd/0x390 mm/slub.c:4172
sock_alloc_inode+0x28/0xc0 net/socket.c:307
alloc_inode+0x65/0x1a0 fs/inode.c:336
sock_alloc net/socket.c:615 [inline]
__sock_create+0x127/0xa30 net/socket.c:1522
sock_create net/socket.c:1616 [inline]
__sys_socket_create net/socket.c:1653 [inline]
__sys_socket+0x150/0x3c0 net/socket.c:1700
__do_sys_socket net/socket.c:1714 [inline]
__se_sys_socket net/socket.c:1712 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1712
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e15d80677
Code: f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 29 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffff2ded608 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6e15d80677
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 000000000000000a
RBP: 00007ffff2dedd2c R08: 00007ffff2ded62c R09: 0079746972756365
R10: 00007ffff2ded690 R11: 0000000000000202 R12: 00007f6e15f07c80
R13: 000000000007f6f5 R14: 000000000007f556 R15: 00007f6e15f09e40
rcu: rcu_preempt kthread starved for 10358 jiffies! g50457 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:26072 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 12313 Comm: syz.2.1651 Not tainted 6.12.0-next-20241119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x19f3/0x2ca0 kernel/smp.c:884
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 36 ea 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 e1 e5 0b 00 eb 38 f3 90 <42> 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 c5 e5
RSP: 0018:ffffc90013be75e0 EFLAGS: 00000246
RAX: ffffffff8193938b RBX: 1ffff110170e88e9 RCX: 0000000000040000
RDX: ffffc90004eab000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc90013be77d0 R08: ffffffff8193935a R09: 1ffffffff2851532
R10: dffffc0000000000 R11: fffffbfff2851533 R12: dffffc0000000000
R13: ffff8880b8744748 R14: ffff8880b863fac0 R15: 0000000000000001
FS: 00007fc1f782e6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1f69618e0 CR3: 00000000648c6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
invalidate_bdev+0x71/0xa0 block/bdev.c:100
btrfs_get_bdev_and_sb+0x10e/0x1f0 fs/btrfs/volumes.c:494
btrfs_open_one_device fs/btrfs/volumes.c:659 [inline]
open_fs_devices+0x2ae/0x12a0 fs/btrfs/volumes.c:1307
btrfs_get_tree_super fs/btrfs/super.c:1857 [inline]
btrfs_get_tree+0x507/0x1a10 fs/btrfs/super.c:2105
vfs_get_tree+0x90/0x2b0 fs/super.c:1814
fc_mount+0x1b/0xb0 fs/namespace.c:1231
btrfs_get_tree_subvol fs/btrfs/super.c:2068 [inline]
btrfs_get_tree+0x65b/0x1a10 fs/btrfs/super.c:2106
vfs_get_tree+0x90/0x2b0 fs/super.c:1814
do_new_mount+0x2be/0xb40 fs/namespace.c:3507
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc1f697fefa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc1f782de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc1f782def0 RCX: 00007fc1f697fefa
RDX: 0000000020000100 RSI: 00000000200015c0 RDI: 00007fc1f782deb0
RBP: 0000000020000100 R08: 00007fc1f782def0 R09: 0000000000400008
R10: 0000000000400008 R11: 0000000000000246 R12: 00000000200015c0
R13: 00007fc1f782deb0 R14: 000000000000559e R15: 0000000020000580