rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5253/1:b..l
(detected by 0, t=10503 jiffies, g=6517, q=407 ncpus=2)
task:syz-executor.1 state:R running task stack:22744 pid:5253 ppid:5133 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x9d1/0xe40 kernel/sched/core.c:6555
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6867
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x21e/0x400 kernel/locking/lockdep.c:5672
Code: 23 00 74 08 4c 89 f7 e8 50 df 77 00 f6 44 24 61 02 0f 85 76 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 2c 00 00 00 00 43 c7 44 2c 09 00 00 00 00 43 c7 44 2c 11
RSP: 0018:ffffc900050aeb40 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000a15d74 RCX: ffff888027278a30
RDX: dffffc0000000000 RSI: ffffffff8b0da9e0 RDI: ffffffff8b697600
RBP: ffffc900050aec88 R08: dffffc0000000000 R09: fffffbfff212de31
R10: fffffbfff212de31 R11: 1ffffffff212de30 R12: dffffc0000000000
R13: 1ffff92000a15d70 R14: ffffc900050aeba0 R15: 0000000000000246
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:325
rcu_read_lock include/linux/rcupdate.h:764 [inline]
is_bpf_text_address+0x27/0x270 kernel/bpf/core.c:717
kernel_text_address+0x9e/0xd0 kernel/extable.c:125
__kernel_text_address+0x9/0x40 kernel/extable.c:79
unwind_get_return_address+0x48/0x80 arch/x86/kernel/unwind_orc.c:342
arch_stack_walk+0xf8/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x12d/0x1f0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:325
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:761 [inline]
slab_alloc_node mm/slub.c:3452 [inline]
slab_alloc mm/slub.c:3460 [inline]
__kmem_cache_alloc_lru mm/slub.c:3467 [inline]
kmem_cache_alloc+0x1b3/0x350 mm/slub.c:3476
kmem_cache_zalloc include/linux/slab.h:710 [inline]
jbd2_alloc_handle include/linux/jbd2.h:1596 [inline]
new_handle fs/jbd2/transaction.c:476 [inline]
jbd2__journal_start+0x143/0x5b0 fs/jbd2/transaction.c:503
__ext4_journal_start_sb+0x13b/0x1f0 fs/ext4/ext4_jbd2.c:111
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_dirty_inode+0x8d/0x100 fs/ext4/inode.c:6107
__mark_inode_dirty+0x1e7/0x600 fs/fs-writeback.c:2419
mark_inode_dirty include/linux/fs.h:2462 [inline]
generic_write_end+0x173/0x460 fs/buffer.c:2184
ext4_da_write_end+0x7b9/0x860 fs/ext4/inode.c:3175
generic_perform_write+0x401/0x610 mm/filemap.c:3783
ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:285
ext4_file_write_iter+0x1d0/0x1900
do_iter_write+0x6f0/0xc50 fs/read_write.c:861
iter_file_splice_write+0x830/0xff0 fs/splice.c:686
do_splice_from fs/splice.c:764 [inline]
direct_splice_actor+0xe6/0x1c0 fs/splice.c:931
splice_direct_to_actor+0x4e4/0xc00 fs/splice.c:886
do_splice_direct+0x2a0/0x3f0 fs/splice.c:974
do_sendfile+0x641/0xfd0 fs/read_write.c:1255
__do_sys_sendfile64 fs/read_write.c:1317 [inline]
__se_sys_sendfile64+0xfc/0x1e0 fs/read_write.c:1309
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x45f679
RSP: 002b:00007fb516da01a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 000000000045f679
RDX: 0000000020000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 00008080fffffffe R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004f0998 R14: 00000000004b0443 R15: 00007fb516da06bc
rcu: rcu_preempt kthread starved for 10576 jiffies! g6517 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:26488 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x9d1/0xe40 kernel/sched/core.c:6555
schedule+0xcb/0x190 kernel/sched/core.c:6631
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x309/0x1070 kernel/rcu/tree.c:1654
rcu_gp_kthread+0xa5/0x390 kernel/rcu/tree.c:1853
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5250 Comm: syz-executor.0 Not tainted 6.1.0-syzkaller-12648-g6feb57c2fd7c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:206
Code: 00 00 00 00 66 90 53 48 89 fb e8 17 00 00 00 48 8b 3d b8 58 22 0d 48 89 de 5b e9 87 d1 55 00 cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0c 25 40 98 03 00 65 8b 15 c4 d0 75 7e f7 c2 00 01 ff 00
RSP: 0018:ffffc900001e0e18 EFLAGS: 00000046
RAX: ffffffff817db659 RBX: 0000000000000003 RCX: 0000000080010002
RDX: ffff88802c35ba80 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 1ffff110173254e1 R08: ffffffff817db64f R09: fffffbfff1d603be
R10: fffffbfff1d603be R11: 1ffffffff1d603bd R12: ffff8880b992a828
R13: 0000005f6b3a3d3c R14: 0000002a872df8a0 R15: 0000000000000003
FS: 00007f80e27f1700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3f16e70e91 CR3: 0000000075d18000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ktime_get_update_offsets_now+0x259/0x460 kernel/time/timekeeping.c:2323
hrtimer_update_base kernel/time/hrtimer.c:631 [inline]
hrtimer_interrupt+0xb5f/0xfd0 kernel/time/hrtimer.c:1843
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x280 arch/x86/kernel/apic/apic.c:1113
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1107
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:unwind_next_frame+0x717/0x24c0 arch/x86/kernel/unwind_orc.c:490
Code: 0f 84 57 04 00 00 89 d9 80 e1 07 38 c1 0f 8c 4a 04 00 00 be 02 00 00 00 48 89 df e8 b3 36 a6 00 e9 bc 1b 00 00 48 8b 44 24 68 <42> 80 3c 08 00 4c 8b 24 24 48 8b 5c 24 60 74 12 48 89 df e8 d1 35
RSP: 0018:ffffc9000501eca0 EFLAGS: 00000297
RAX: 1ffff92000a03db7 RBX: 0000000000000005 RCX: ffffffff8ec73e80
RDX: ffffffff8f42cc20 RSI: ffffffff81e416ae RDI: ffffffff813e3563
RBP: 0000000000000002 R08: 0000000000000003 R09: dffffc0000000000
R10: fffff52000a03dbc R11: 1ffff92000a03dba R12: ffffffff81e416ad
R13: ffffffff8f42cc30 R14: ffffffff8f42cc2c R15: 1ffffffff1e85986
arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x12d/0x1f0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:518
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1807
slab_free mm/slub.c:3787 [inline]
kmem_cache_free+0x94/0x1d0 mm/slub.c:3809
jbd2_free_handle include/linux/jbd2.h:1601 [inline]
jbd2_journal_stop+0x894/0xba0 fs/jbd2/transaction.c:1956
__ext4_journal_stop+0xf8/0x190 fs/ext4/ext4_jbd2.c:133
__mark_inode_dirty+0x1e7/0x600 fs/fs-writeback.c:2419
generic_update_time fs/inode.c:1859 [inline]
inode_update_time fs/inode.c:1872 [inline]
__file_update_time fs/inode.c:2057 [inline]
file_modified_flags+0x69a/0x700 fs/inode.c:2130
ext4_write_checks+0x249/0x2c0 fs/ext4/file.c:264
ext4_buffered_write_iter+0xbc/0x3a0 fs/ext4/file.c:280
ext4_file_write_iter+0x1d0/0x1900
do_iter_write+0x6f0/0xc50 fs/read_write.c:861
iter_file_splice_write+0x830/0xff0 fs/splice.c:686
do_splice_from fs/splice.c:764 [inline]
direct_splice_actor+0xe6/0x1c0 fs/splice.c:931
splice_direct_to_actor+0x4e4/0xc00 fs/splice.c:886
do_splice_direct+0x2a0/0x3f0 fs/splice.c:974
do_sendfile+0x641/0xfd0 fs/read_write.c:1255
__do_sys_sendfile64 fs/read_write.c:1317 [inline]
__se_sys_sendfile64+0xfc/0x1e0 fs/read_write.c:1309
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x45f679
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f80e27f11a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 000000000052bfa0 RCX: 000000000045f679
RDX: 0000000020000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 00008080fffffffe R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004f0998 R14: 00000000004b0443 R15: 00007f80e27f16bc
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.409 msecs
sched: RT throttling activated