INFO: task syz.3.73:4692 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.73 state:D stack:28376 pid: 4692 ppid: 4191 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735
blkdev_common_ioctl+0x1073/0x1f00 block/ioctl.c:532
blkdev_ioctl+0x291/0x700 block/ioctl.c:598
block_ioctl+0xac/0xf0 block/fops.c:496
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7efe2ec83e59
RSP: 002b:00007efe2cebc028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efe2eefd090 RCX: 00007efe2ec83e59
RDX: 0000000000000000 RSI: 0000000000001274 RDI: 0000000000000003
RBP: 00007efe2ed19d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efe2eefd128 R14: 00007efe2eefd090 R15: 00007fff5d168fb8
INFO: task syz.3.73:4694 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.73 state:D stack:28784 pid: 4694 ppid: 4191 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735
blkdev_common_ioctl+0x1073/0x1f00 block/ioctl.c:532
blkdev_ioctl+0x291/0x700 block/ioctl.c:598
block_ioctl+0xac/0xf0 block/fops.c:496
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7efe2ec83e59
RSP: 002b:00007efe2ce9b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efe2eefd180 RCX: 00007efe2ec83e59
RDX: 0000000000000000 RSI: 0000000000001275 RDI: 0000000000000003
RBP: 00007efe2ed19d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efe2eefd218 R14: 00007efe2eefd180 R15: 00007fff5d168fb8
INFO: task syz.3.73:4711 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.73 state:D stack:28784 pid: 4711 ppid: 4191 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735
blkdev_common_ioctl+0x1073/0x1f00 block/ioctl.c:532
blkdev_ioctl+0x291/0x700 block/ioctl.c:598
block_ioctl+0xac/0xf0 block/fops.c:496
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7efe2ec83e59
RSP: 002b:00007efe2ca78028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efe2eefd270 RCX: 00007efe2ec83e59
RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000003
RBP: 00007efe2ed19d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efe2eefd308 R14: 00007efe2eefd270 R15: 00007fff5d168fb8
INFO: task syz.3.73:4731 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.73 state:D stack:28784 pid: 4731 ppid: 4191 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735
blkdev_common_ioctl+0x1073/0x1f00 block/ioctl.c:532
blkdev_ioctl+0x291/0x700 block/ioctl.c:598
block_ioctl+0xac/0xf0 block/fops.c:496
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7efe2ec83e59
RSP: 002b:00007efe2c655028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efe2eefd360 RCX: 00007efe2ec83e59
RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000003
RBP: 00007efe2ed19d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efe2eefd3f8 R14: 00007efe2eefd360 R15: 00007fff5d168fb8
Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
#0: ffff888016c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc90000ce7d00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
1 lock held by khungtaskd/27:
#0: ffffffff8c31f320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kswapd1/255:
1 lock held by jbd2/sda1-8/3523:
#0: ffffffff8c3b04c8 (oom_lock){+.+.}-{3:3}, at: __alloc_pages_may_oom mm/page_alloc.c:4308 [inline]
#0: ffffffff8c3b04c8 (oom_lock){+.+.}-{3:3}, at: __alloc_pages_slowpath+0x1d0c/0x28b0 mm/page_alloc.c:5177
2 locks held by klogd/3550:
#0: ffff88807f22b928 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807f22b928 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
2 locks held by udevd/3561:
#0: ffff88802557c160 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline]
#0: ffff88802557c160 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x83b/0x1370 mm/filemap.c:3096
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
2 locks held by dhcpcd/3853:
#0: ffff88802c0c8f28 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88802c0c8f28 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
2 locks held by crond/3928:
#0: ffff88807936b928 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807936b928 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
2 locks held by getty/3951:
#0: ffff88802cb18098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900025e62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158
2 locks held by syz-executor/4175:
#0: ffff88807a223228 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807a223228 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
2 locks held by syz-executor/4189:
#0: ffff88807c0ac728 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807c0ac728 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
2 locks held by syz-executor/4198:
#0: ffff88807a227828 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807a227828 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
3 locks held by kworker/0:8/4269:
#0: ffff888016c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc900032efd00 ((work_completion)(&(&vi->refill)->work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
#2: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#2: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#2: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
2 locks held by kworker/u4:8/4322:
#0: ffff888016c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc9000321fd00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
2 locks held by syz-executor/4347:
#0: ffff88807b82ab28 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807b82ab28 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
3 locks held by syz.3.73/4690:
#0: ffff888020d65b88 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735
#1: ffffffff8c35da68 (relay_channels_mutex){+.+.}-{3:3}, at: relay_open+0x314/0x8e0 kernel/relay.c:518
#2: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#2: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#2: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
1 lock held by syz.3.73/4692:
#0: ffff888020d65b88 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735
1 lock held by syz.3.73/4694:
#0: ffff888020d65b88 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735
1 lock held by syz.3.73/4711:
#0: ffff888020d65b88 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735
1 lock held by syz.3.73/4731:
#0: ffff888020d65b88 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735
2 locks held by syz-executor/5019:
#0: ffff88802c0ce328 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88802c0ce328 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
2 locks held by udevd/5603:
#0: ffff88802bbb8828 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88802bbb8828 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
4 locks held by udevd/5891:
2 locks held by modprobe/5922:
#0: ffff88802bf73228 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88802bf73228 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
4 locks held by modprobe/5929:
4 locks held by syz.1.349/5944:
#0: ffff88807e737128 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807e737128 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
#2: ffff8880b913a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
#3: ffff8880b9127888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4fe/0x7d0 kernel/sched/psi.c:891
2 locks held by syz.4.351/5950:
#0: ffff888016c6ab28 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff888016c6ab28 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3def68 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x57/0x720 mm/page_alloc.c:3189
2 locks held by syz-executor/5951:
#0: ffff88807e734028 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807e734028 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x2b9/0xc80 arch/x86/mm/fault.c:1296
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4654 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4678 [inline]
#1: ffffffff8c3df260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10e8/0x28b0 mm/page_alloc.c:5128
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5672 Comm: kworker/1:9 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:check_kcov_mode kernel/kcov.c:172 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:227 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0x64/0xe0 kernel/kcov.c:329
Code: f3 2e 8a 48 8b 54 24 20 65 4c 8b 05 06 35 89 7e 45 31 c9 eb 08 49 ff c1 4c 39 c8 74 77 4e 8b 54 ce 10 65 44 8b 1d f4 34 89 7e <41> 81 e3 00 01 ff 00 74 13 41 81 fb 00 01 00 00 75 d9 41 83 b8 34
RSP: 0000:ffffc900033eece8 EFLAGS: 00000216
RAX: 0000000000000012 RBX: ffff0a0000000509 RCX: 0000000000000001
RDX: ffffffff8407291e RSI: ffffffff8c93e9c0 RDI: 0000000000000009
RBP: ffffffff8a2be785 R08: ffff88802c28bb80 R09: 0000000000000009
R10: 0000000000000009 R11: 0000000000000002 R12: 0000000000000009
R13: ffffc900033eefe1 R14: 0000000000000004 R15: ffffffff8a2be781
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559549b81bd6 CR3: 000000002aa0c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
vsnprintf+0x10e/0x1c20 lib/vsprintf.c:2767
sprintf+0xe4/0x140 lib/vsprintf.c:3013
print_time kernel/printk/printk.c:1274 [inline]
info_print_prefix+0x168/0x360 kernel/printk/printk.c:1300
record_print_text kernel/printk/printk.c:1349 [inline]
console_unlock+0x66e/0x1120 kernel/printk/printk.c:2725
vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274
_printk+0xda/0x130 kernel/printk/printk.c:2299
show_node mm/page_alloc.c:5859 [inline]
show_free_areas+0xf55/0x1c60 mm/page_alloc.c:6120
show_mem+0x36/0x310 lib/show_mem.c:17
warn_alloc_show_mem mm/page_alloc.c:4241 [inline]
warn_alloc+0x2f4/0x320 mm/page_alloc.c:4266
__alloc_pages_slowpath+0x2844/0x28b0 mm/page_alloc.c:5244
__alloc_pages+0x340/0x480 mm/page_alloc.c:5514
allocate_slab mm/slub.c:1925 [inline]
new_slab+0x2e6/0x4b0 mm/slub.c:1980
___slab_alloc+0x80a/0xdd0 mm/slub.c:3013
__slab_alloc mm/slub.c:3100 [inline]
slab_alloc_node mm/slub.c:3191 [inline]
kmem_cache_alloc_node+0x1c3/0x2d0 mm/slub.c:3261
__alloc_skb+0xf4/0x750 net/core/skbuff.c:415
alloc_skb include/linux/skbuff.h:1162 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:664 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:721 [inline]
nsim_dev_trap_report_work+0x2a1/0xb40 drivers/net/netdevsim/dev.c:762
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
SLUB: Unable to allocate memory on node -1, gfp=0xa20(GFP_ATOMIC)
cache: skbuff_head_cache, object size: 232, buffer size: 320, default order: 0, min order: 0
node 0: slabs: 6623, objs: 79476, free: 0
node 1: slabs: 2091, objs: 25092, free: 30
SLUB: Unable to allocate memory on node -1, gfp=0xa20(GFP_ATOMIC)
cache: skbuff_head_cache, object size: 232, buffer size: 320, default order: 0, min order: 0
node 0: slabs: 6623, objs: 79476, free: 0
node 1: slabs: 2091, objs: 25092, free: 30
SLUB: Unable to allocate memory on node -1, gfp=0xa20(GFP_ATOMIC)
cache: skbuff_head_cache, object size: 232, buffer size: 320, default order: 0, min order: 0
node 0: slabs: 6623, objs: 79476, free: 0
node 1: slabs: 2091, objs: 25092, free: 30
SLUB: Unable to allocate memory on node -1, gfp=0xa20(GFP_ATOMIC)
cache: skbuff_head_cache, object size: 232, buffer size: 320, default order: 0, min order: 0
node 0: slabs: 6623, objs: 79476, free: 0
node 1: slabs: 2091, objs: 25092, free: 30
SLUB: Unable to allocate memory on node -1, gfp=0xa20(GFP_ATOMIC)
cache: skbuff_head_cache, object size: 232, buffer size: 320, default order: 0, min order: 0
node 0: slabs: 6623, objs: 79476, free: 0
node 1: slabs: 2091, objs: 25092, free: 30
SLUB: Unable to allocate memory on node -1, gfp=0xa20(GFP_ATOMIC)
cache: skbuff_head_cache, object size: 232, buffer size: 320, default order: 0, min order: 0
node 0: slabs: 6623, objs: 79476, free: 0
node 1: slabs: 2091, objs: 25092, free: 30