[v6.1] INFO: rcu detected stall in dput
10 views
Skip to first unread message
syzbot
Jul 12, 2023, 6:45:00 PM7/12/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 61fd484b2cf6 Linux 6.1.38
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10aba842a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=6a21f730857cfa53
dashboard link: https://syzkaller.appspot.com/bug?extid=0dcd61a8a5e90d5867b5
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/eb0882a0450c/disk-61fd484b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/483d02c4c64c/vmlinux-61fd484b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3b4bb7e6bcff/bzImage-61fd484b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0dcd61...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 ticks this GP) idle=3a74/1/0x4000000000000000 softirq=81941/81941 fqs=1
(detected by 1, t=10503 jiffies, g=118625, q=242 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 20827 Comm: syz-executor.4 Not tainted 6.1.38-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:rb_erase_cached include/linux/rbtree.h:124 [inline]
RIP: 0010:timerqueue_del+0x8a/0xf0 lib/timerqueue.c:57
Code: 2f 00 74 08 48 89 df e8 14 fa 61 f7 4c 39 2b 74 07 e8 4a 94 0b f7 eb 25 e8 43 94 0b f7 4c 89 ef e8 cb 86 ff ff 41 80 3c 2f 00 <74> 0e 48 89 df 49 89 c7 e8 69 fa 61 f7 4c 89 f8 48 89 03 4c 89 ef
RSP: 0018:ffffc90000007d28 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880b982a618 RCX: ffff888015eb1dc0
RDX: 0000000000010001 RSI: ffff888014f30340 RDI: ffff888014f30340
RBP: dffffc0000000000 R08: ffffffff8a7e46c4 R09: fffffbfff1ca6a76
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110029e6068
R13: ffff888014f30340 R14: ffff8880b982a610 R15: 1ffff110173054c3
FS: 000055555683a480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd442c9c48 CR3: 000000008abf2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
__remove_hrtimer kernel/time/hrtimer.c:1116 [inline]
__run_hrtimer kernel/time/hrtimer.c:1665 [inline]
__hrtimer_run_queues+0x409/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:preempt_count kernel/rcu/tree.c:760 [inline]
RIP: 0010:rcu_lockdep_current_cpu_online+0x2/0x120 kernel/rcu/tree.c:764
Code: db 48 89 df e8 ff 6e 6d 00 eb d1 44 89 f6 48 c7 c7 40 ec f2 8c e8 ae e2 ec 02 eb 88 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 <41> 56 53 65 8b 0d fc 9c 8f 7e b0 01 f7 c1 00 00 f0 00 0f 85 d5 00
RSP: 0018:ffffc9000340f4f0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff888015eb1dc0
RDX: 0000000000000000 RSI: ffffffff8b3cce40 RDI: ffffffff8b3cce00
RBP: 00000000000000a0 R08: ffffffff81eaba95 R09: fffffbfff2052845
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888013cc0000 R15: 000000000002c6ea
rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
rcu_read_lock_held+0x1a/0x40 kernel/rcu/update.c:309
lookup_page_ext mm/page_ext.c:277 [inline]
page_ext_get+0x169/0x270 mm/page_ext.c:158
__reset_page_owner+0x32/0x1a0 mm/page_owner.c:144
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1460 [inline]
free_pcp_prepare mm/page_alloc.c:1510 [inline]
free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3388
free_unref_page_list+0x107/0x810 mm/page_alloc.c:3530
release_pages+0x2836/0x2b40 mm/swap.c:1055
__pagevec_release+0x80/0xf0 mm/swap.c:1075
pagevec_release include/linux/pagevec.h:71 [inline]
folio_batch_release include/linux/pagevec.h:135 [inline]
shmem_undo_range+0x867/0x2020 mm/shmem.c:944
shmem_truncate_range mm/shmem.c:1043 [inline]
shmem_evict_inode+0x265/0xa60 mm/shmem.c:1152
evict+0x2a4/0x620 fs/inode.c:664
__dentry_kill+0x436/0x650 fs/dcache.c:607
dentry_kill+0xbb/0x290
dput+0x1ef/0x420 fs/dcache.c:913
__fput+0x5e4/0x890 fs/file_table.c:328
task_work_run+0x246/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1dd007de57
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd8631f4b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1dd007de57
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffd8631f570
RBP: 00007ffd8631f570 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd86320630
R13: 00007f1dd00c73b9 R14: 00000000001a8ad8 R15: 0000000000000003
</TASK>
rcu: rcu_preempt kthread starved for 10501 jiffies! g118625 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:25432 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x132c/0x4330 kernel/sched/core.c:6554
schedule+0xbf/0x180 kernel/sched/core.c:6630
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661
rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 23993 Comm: syz-executor.3 Not tainted 6.1.38-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:csd_lock_wait kernel/smp.c:413 [inline]
RIP: 0010:smp_call_function_many_cond+0x1f62/0x33d0 kernel/smp.c:987
Code: 2f 44 89 ee 83 e6 01 31 ff e8 9a 11 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 0a e8 25 0e 0b 00 e9 1b ff ff ff f3 90 <42> 0f b6 04 2b 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 fe fe ff ff
RSP: 0018:ffffc9000907f5e0 EFLAGS: 00000246
RAX: ffffffff817ecd3d RBX: 1ffff1101730841d RCX: 0000000000040000
RDX: ffffc9000cc25000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000907f9b0 R08: ffffffff817ecd06 R09: fffff5200120fead
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b98420e8
FS: 00007fad363066c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000200 CR3: 0000000033673000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
</IRQ>
<TASK>
clock_was_set+0x83c/0x900 kernel/time/hrtimer.c:974
timekeeping_inject_offset+0x65f/0x710 kernel/time/timekeeping.c:1395
do_adjtimex+0x511/0xaa0 kernel/time/timekeeping.c:2444
do_clock_adjtime kernel/time/posix-timers.c:1122 [inline]
__do_sys_clock_adjtime kernel/time/posix-timers.c:1134 [inline]
__se_sys_clock_adjtime kernel/time/posix-timers.c:1125 [inline]
__x64_sys_clock_adjtime+0x1dc/0x290 kernel/time/posix-timers.c:1125
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fad3567cb29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fad363060c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007fad3579c050 RCX: 00007fad3567cb29
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007fad356c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fad3579c050 R15: 00007ffd442cb1d8
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 61fd484b2cf6 Linux 6.1.38
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10aba842a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=6a21f730857cfa53
dashboard link: https://syzkaller.appspot.com/bug?extid=0dcd61a8a5e90d5867b5
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/eb0882a0450c/disk-61fd484b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/483d02c4c64c/vmlinux-61fd484b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3b4bb7e6bcff/bzImage-61fd484b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0dcd61...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 ticks this GP) idle=3a74/1/0x4000000000000000 softirq=81941/81941 fqs=1
(detected by 1, t=10503 jiffies, g=118625, q=242 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 20827 Comm: syz-executor.4 Not tainted 6.1.38-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:rb_erase_cached include/linux/rbtree.h:124 [inline]
RIP: 0010:timerqueue_del+0x8a/0xf0 lib/timerqueue.c:57
Code: 2f 00 74 08 48 89 df e8 14 fa 61 f7 4c 39 2b 74 07 e8 4a 94 0b f7 eb 25 e8 43 94 0b f7 4c 89 ef e8 cb 86 ff ff 41 80 3c 2f 00 <74> 0e 48 89 df 49 89 c7 e8 69 fa 61 f7 4c 89 f8 48 89 03 4c 89 ef
RSP: 0018:ffffc90000007d28 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880b982a618 RCX: ffff888015eb1dc0
RDX: 0000000000010001 RSI: ffff888014f30340 RDI: ffff888014f30340
RBP: dffffc0000000000 R08: ffffffff8a7e46c4 R09: fffffbfff1ca6a76
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110029e6068
R13: ffff888014f30340 R14: ffff8880b982a610 R15: 1ffff110173054c3
FS: 000055555683a480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd442c9c48 CR3: 000000008abf2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
__remove_hrtimer kernel/time/hrtimer.c:1116 [inline]
__run_hrtimer kernel/time/hrtimer.c:1665 [inline]
__hrtimer_run_queues+0x409/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:preempt_count kernel/rcu/tree.c:760 [inline]
RIP: 0010:rcu_lockdep_current_cpu_online+0x2/0x120 kernel/rcu/tree.c:764
Code: db 48 89 df e8 ff 6e 6d 00 eb d1 44 89 f6 48 c7 c7 40 ec f2 8c e8 ae e2 ec 02 eb 88 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 <41> 56 53 65 8b 0d fc 9c 8f 7e b0 01 f7 c1 00 00 f0 00 0f 85 d5 00
RSP: 0018:ffffc9000340f4f0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff888015eb1dc0
RDX: 0000000000000000 RSI: ffffffff8b3cce40 RDI: ffffffff8b3cce00
RBP: 00000000000000a0 R08: ffffffff81eaba95 R09: fffffbfff2052845
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888013cc0000 R15: 000000000002c6ea
rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
rcu_read_lock_held+0x1a/0x40 kernel/rcu/update.c:309
lookup_page_ext mm/page_ext.c:277 [inline]
page_ext_get+0x169/0x270 mm/page_ext.c:158
__reset_page_owner+0x32/0x1a0 mm/page_owner.c:144
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1460 [inline]
free_pcp_prepare mm/page_alloc.c:1510 [inline]
free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3388
free_unref_page_list+0x107/0x810 mm/page_alloc.c:3530
release_pages+0x2836/0x2b40 mm/swap.c:1055
__pagevec_release+0x80/0xf0 mm/swap.c:1075
pagevec_release include/linux/pagevec.h:71 [inline]
folio_batch_release include/linux/pagevec.h:135 [inline]
shmem_undo_range+0x867/0x2020 mm/shmem.c:944
shmem_truncate_range mm/shmem.c:1043 [inline]
shmem_evict_inode+0x265/0xa60 mm/shmem.c:1152
evict+0x2a4/0x620 fs/inode.c:664
__dentry_kill+0x436/0x650 fs/dcache.c:607
dentry_kill+0xbb/0x290
dput+0x1ef/0x420 fs/dcache.c:913
__fput+0x5e4/0x890 fs/file_table.c:328
task_work_run+0x246/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1dd007de57
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd8631f4b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1dd007de57
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffd8631f570
RBP: 00007ffd8631f570 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd86320630
R13: 00007f1dd00c73b9 R14: 00000000001a8ad8 R15: 0000000000000003
</TASK>
rcu: rcu_preempt kthread starved for 10501 jiffies! g118625 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:25432 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x132c/0x4330 kernel/sched/core.c:6554
schedule+0xbf/0x180 kernel/sched/core.c:6630
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661
rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 23993 Comm: syz-executor.3 Not tainted 6.1.38-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:csd_lock_wait kernel/smp.c:413 [inline]
RIP: 0010:smp_call_function_many_cond+0x1f62/0x33d0 kernel/smp.c:987
Code: 2f 44 89 ee 83 e6 01 31 ff e8 9a 11 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 0a e8 25 0e 0b 00 e9 1b ff ff ff f3 90 <42> 0f b6 04 2b 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 fe fe ff ff
RSP: 0018:ffffc9000907f5e0 EFLAGS: 00000246
RAX: ffffffff817ecd3d RBX: 1ffff1101730841d RCX: 0000000000040000
RDX: ffffc9000cc25000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000907f9b0 R08: ffffffff817ecd06 R09: fffff5200120fead
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b98420e8
FS: 00007fad363066c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000200 CR3: 0000000033673000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
</IRQ>
<TASK>
clock_was_set+0x83c/0x900 kernel/time/hrtimer.c:974
timekeeping_inject_offset+0x65f/0x710 kernel/time/timekeeping.c:1395
do_adjtimex+0x511/0xaa0 kernel/time/timekeeping.c:2444
do_clock_adjtime kernel/time/posix-timers.c:1122 [inline]
__do_sys_clock_adjtime kernel/time/posix-timers.c:1134 [inline]
__se_sys_clock_adjtime kernel/time/posix-timers.c:1125 [inline]
__x64_sys_clock_adjtime+0x1dc/0x290 kernel/time/posix-timers.c:1125
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fad3567cb29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fad363060c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007fad3579c050 RCX: 00007fad3567cb29
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007fad356c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fad3579c050 R15: 00007ffd442cb1d8
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Jul 20, 2023, 5:20:06 PM7/20/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: d54cfc420586 Linux 5.15.120
syzbot found the following issue on:
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12d2c19ea80000
kernel config: https://syzkaller.appspot.com/x/.config?x=f546a5c7ff981a94
dashboard link: https://syzkaller.appspot.com/bug?extid=968ea94b9ed7af27be8e
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
vmlinux: https://storage.googleapis.com/syzbot-assets/b8e802138c25/vmlinux-d54cfc42.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9b3b48ff5c05/bzImage-d54cfc42.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 0, t=10502 jiffies, g=114133, q=420)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6559 Comm: syz-executor.4 Not tainted 5.15.120-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:91 [inline]
RIP: 0010:lock_release+0xfd/0x9a0 kernel/locking/lockdep.c:5635
Code: 0f 85 e0 05 00 00 83 3d 94 8f 81 0c 00 0f 84 3e 05 00 00 65 8b 05 83 e4 9f 7e 85 c0 0f 85 2f 05 00 00 65 48 8b 05 33 db 9f 7e <48> 89 44 24 18 48 8d 98 ec 0a 00 00 48 89 d8 48 c1 e8 03 42 0f b6
RSP: 0018:ffffc90000dd0b60 EFLAGS: 00000046
RAX: ffff88801c259dc0 RBX: 0000000000000001 RCX: ffffffff81629438
RDX: 0000000000000000 RSI: ffffffff8ad86260 RDI: ffffffff8ad86220
RBP: ffffc90000dd0ca0 R08: dffffc0000000000 R09: fffffbfff1bc7e0e
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001ba178
R13: ffffffff886ae4bb R14: dffffc0000000000 R15: dffffc0000000000
FS: 0000555555a36480(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f76fda11000 CR3: 00000000631ec000 CR4: 00000000003506e0
Call Trace:
<NMI>
</NMI>
<IRQ>
__raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
<NMI>
</NMI>
<IRQ>
_raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:403 [inline]
advance_sched+0x68b/0x940 net/sched/sch_taprio.c:765
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:memset_erms+0xb/0x10 arch/x86/lib/memset_64.S:65
Code: 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3 aa <4c> 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 01 01
RSP: 0018:ffffc90005f07160 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc90005f072d0 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc90005f072e0
RBP: ffffffff8e5807ee R08: dffffc0000000000 R09: ffffc90005f072d0
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1cb00fd
R13: 1ffffffff1cb00fd R14: ffffffff8e5807ea R15: ffffc90005f07280
unwind_next_frame+0xbc8/0x1fa0 arch/x86/kernel/unwind_orc.c:547
__unwind_start+0x59d/0x720 arch/x86/kernel/unwind_orc.c:704
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0xdb/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
save_stack+0xf6/0x1e0 mm/page_owner.c:119
__reset_page_owner+0x52/0x180 mm/page_owner.c:140
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page_list+0x1f7/0x8e0 mm/page_alloc.c:3433
release_pages+0x1bb9/0x1f40 mm/swap.c:963
__pagevec_release+0x80/0xf0 mm/swap.c:983
pagevec_release include/linux/pagevec.h:81 [inline]
shmem_undo_range+0x67a/0x1b50 mm/shmem.c:964
shmem_truncate_range mm/shmem.c:1063 [inline]
shmem_evict_inode+0x21b/0xa00 mm/shmem.c:1145
evict+0x2a4/0x620 fs/inode.c:587
__dentry_kill+0x436/0x650 fs/dcache.c:582
dentry_kill+0xbb/0x290
dput+0x1f1/0x420 fs/dcache.c:888
__fput+0x5ec/0x890 fs/file_table.c:288
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fa30fffae57
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc206a04a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fa30fffae57
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffc206a0560
RBP: 00007ffc206a0560 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc206a1620
R13: 00007fa3100443b9 R14: 0000000000190073 R15: 0000000000000004
</TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g114133 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=69998
rcu: rcu_preempt kthread starved for 10502 jiffies! g114133 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27000 pid: 15 ppid: 2 flags:0x00004000
rcu: RCU grace-period kthread stack dump:
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1959
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2132
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 6559 Comm: syz-executor.4 Not tainted 5.15.120-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:436 [inline]
RIP: 0010:lock_acquire+0x1f8/0x4f0 kernel/locking/lockdep.c:5624
Code: 00 ff 75 10 ff 74 24 40 e8 55 04 00 00 48 83 c4 20 48 c7 c7 00 10 8b 8a e8 05 4e b9 08 b8 ff ff ff ff 65 0f c1 05 98 09 a0 7e <83> f8 01 0f 85 a4 01 00 00 49 89 de 48 c1 eb 03 42 80 3c 2b 00 74
RSP: 0018:ffffc90000dd0b40 EFLAGS: 00000057
RAX: 0000000000000001 RBX: ffffc90000dd0ba0 RCX: ffffffff816326d2
RDX: dffffc0000000000 RSI: ffffffff8a8b1000 RDI: ffffffff8ad86280
RBP: ffffc90000dd0c98 R08: dffffc0000000000 R09: fffffbfff1f7a46b
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001ba170
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000046
FS: 0000555555a36480(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f76fda11000 CR3: 00000000631ec000 CR4: 00000000003506e0
Call Trace:
<NMI>
</NMI>
<IRQ>
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
<NMI>
</NMI>
<IRQ>
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:363 [inline]
advance_sched+0x47/0x940 net/sched/sch_taprio.c:716
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:memset_erms+0xb/0x10 arch/x86/lib/memset_64.S:65
Code: 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3 aa <4c> 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 01 01
RSP: 0018:ffffc90005f07160 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc90005f072d0 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc90005f072e0
RBP: ffffffff8e5807ee R08: dffffc0000000000 R09: ffffc90005f072d0
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1cb00fd
R13: 1ffffffff1cb00fd R14: ffffffff8e5807ea R15: ffffc90005f07280
unwind_next_frame+0xbc8/0x1fa0 arch/x86/kernel/unwind_orc.c:547
__unwind_start+0x59d/0x720 arch/x86/kernel/unwind_orc.c:704
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0xdb/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
save_stack+0xf6/0x1e0 mm/page_owner.c:119
__reset_page_owner+0x52/0x180 mm/page_owner.c:140
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page_list+0x1f7/0x8e0 mm/page_alloc.c:3433
release_pages+0x1bb9/0x1f40 mm/swap.c:963
__pagevec_release+0x80/0xf0 mm/swap.c:983
pagevec_release include/linux/pagevec.h:81 [inline]
shmem_undo_range+0x67a/0x1b50 mm/shmem.c:964
shmem_truncate_range mm/shmem.c:1063 [inline]
shmem_evict_inode+0x21b/0xa00 mm/shmem.c:1145
evict+0x2a4/0x620 fs/inode.c:587
__dentry_kill+0x436/0x650 fs/dcache.c:582
dentry_kill+0xbb/0x290
dput+0x1f1/0x420 fs/dcache.c:888
__fput+0x5ec/0x890 fs/file_table.c:288
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fa30fffae57
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc206a04a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fa30fffae57
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffc206a0560
RBP: 00007ffc206a0560 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc206a1620
R13: 00007fa3100443b9 R14: 0000000000190073 R15: 0000000000000004
syzbot
Oct 20, 2023, 6:44:46 PM10/20/23
to syzkaller...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
syzbot
Dec 7, 2023, 7:28:17 PM12/7/23
to syzkaller...@googlegroups.com
Reply all
Reply to author
Forward
0 new messages