INFO: task syz-executor:5829 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22104 pid:5829 tgid:5829 ppid:5828 task_flags:0x440100 flags:0x00080001
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7026
io_schedule+0xbf/0x130 kernel/sched/core.c:7871
bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x93d/0x1320 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1241
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:242
ext4_reserve_inode_write+0x1be/0x340 fs/ext4/inode.c:6326
__ext4_mark_inode_dirty+0x197/0x870 fs/ext4/inode.c:6501
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6538
__mark_inode_dirty+0x1eb/0xe40 fs/fs-writeback.c:2566
generic_update_time+0xcf/0xf0 fs/inode.c:2105
inode_update_time fs/inode.c:2118 [inline]
__file_update_time fs/inode.c:2345 [inline]
file_update_time+0x17d/0x1c0 fs/inode.c:2375
ext4_page_mkwrite+0x33d/0x1880 fs/ext4/inode.c:6704
do_page_mkwrite+0x171/0x380 mm/memory.c:3361
wp_page_shared mm/memory.c:3762 [inline]
do_wp_page+0xb10/0x4f00 mm/memory.c:3981
handle_pte_fault mm/memory.c:6068 [inline]
__handle_mm_fault+0x1b2d/0x2a50 mm/memory.c:6195
handle_mm_fault+0x589/0xd10 mm/memory.c:6364
do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f81612781ff
RSP: 002b:00007ffe7ce26fe0 EFLAGS: 00010202
RAX: 00007f815f338000 RBX: 00005555559b4630 RCX: 0000000000000003
RDX: 1ffffffff0c1395b RSI: 00005555559b4698 RDI: 0000000000000008
RBP: 00007ffe7ce272d0 R08: 00005555559b46c0 R09: 000000000000272b
R10: 0000000000000001 R11: 00007ffe7ce274e0 R12: 00007ffe7ce27330
R13: 0000000000000004 R14: 00007ffe7ce27050 R15: 00007ffe7ce27120
INFO: task syz.2.24:6035 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.24 state:D stack:24056 pid:6035 tgid:6030 ppid:5848 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7026
io_schedule+0xbf/0x130 kernel/sched/core.c:7871
folio_wait_bit_common+0x3d5/0x9e0 mm/filemap.c:1317
folio_wait_writeback+0x3c/0x90 mm/page-writeback.c:3124
__filemap_fdatawait_range+0x11f/0x200 mm/filemap.c:539
file_write_and_wait_range+0x101/0x140 mm/filemap.c:798
ext4_sync_file+0x310/0xf10 fs/ext4/fsync.c:154
vfs_fsync_range+0x139/0x220 fs/sync.c:187
__do_sys_msync+0x3cb/0x5c0 mm/msync.c:96
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd2e558eec9
RSP: 002b:00007fd2e37f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000001a
RAX: ffffffffffffffda RBX: 00007fd2e57e6090 RCX: 00007fd2e558eec9
RDX: 0000000400000004 RSI: 01800000000000fe RDI: 000000001ffff000
RBP: 00007fd2e5611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd2e57e6128 R14: 00007fd2e57e6090 R15: 00007ffeeb2c77f8
INFO: task syz.0.31:6063 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.31 state:D stack:26216 pid:6063 tgid:6063 ppid:5838 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7026
io_schedule+0xbf/0x130 kernel/sched/core.c:7871
bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x93d/0x1320 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1241
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:242
ext4_reserve_inode_write+0x1be/0x340 fs/ext4/inode.c:6326
__ext4_mark_inode_dirty+0x197/0x870 fs/ext4/inode.c:6501
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6538
__mark_inode_dirty+0x1eb/0xe40 fs/fs-writeback.c:2566
generic_update_time+0xcf/0xf0 fs/inode.c:2105
inode_update_time fs/inode.c:2118 [inline]
__file_update_time fs/inode.c:2345 [inline]
file_update_time+0x17d/0x1c0 fs/inode.c:2375
ext4_page_mkwrite+0x33d/0x1880 fs/ext4/inode.c:6704
do_page_mkwrite+0x171/0x380 mm/memory.c:3361
wp_page_shared mm/memory.c:3762 [inline]
do_wp_page+0xb10/0x4f00 mm/memory.c:3981
handle_pte_fault mm/memory.c:6068 [inline]
__handle_mm_fault+0x1b2d/0x2a50 mm/memory.c:6195
handle_mm_fault+0x589/0xd10 mm/memory.c:6364
do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7ff6c5c6ee47
RSP: 002b:00007fff474dcfa0 EFLAGS: 00010202
RAX: 0000001b31a23e10 RBX: 00007ff6c6b15720 RCX: ffffffff81a6dc49
RDX: 0000001b31a23e0c RSI: 0000000000000004 RDI: 00007ff6c6b15720
RBP: fffffffffffffe10 R08: 00007ff6c5fe6038 R09: 00007ff6c5fd2000
R10: 00007ff6c57ff008 R11: 000000000000000b R12: 00000000000001f0
R13: 0000000000000000 R14: 0000000000000000 R15: 000000000007ffff
INFO: task syz.0.31:6065 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.31 state:D stack:23368 pid:6065 tgid:6063 ppid:5838 task_flags:0x400940 flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7026
io_schedule+0xbf/0x130 kernel/sched/core.c:7871
folio_wait_bit_common+0x3d5/0x9e0 mm/filemap.c:1317
folio_wait_writeback+0x3c/0x90 mm/page-writeback.c:3124
shrink_folio_list+0x1b00/0x4880 mm/vmscan.c:1264
shrink_inactive_list mm/vmscan.c:2050 [inline]
shrink_list mm/vmscan.c:2287 [inline]
shrink_lruvec+0xf46/0x2b00 mm/vmscan.c:5849
shrink_node_memcgs mm/vmscan.c:6051 [inline]
shrink_node+0x982/0x3d50 mm/vmscan.c:6092
shrink_zones mm/vmscan.c:6336 [inline]
do_try_to_free_pages+0x362/0x1920 mm/vmscan.c:6398
try_to_free_mem_cgroup_pages+0x31b/0x790 mm/vmscan.c:6726
mem_cgroup_resize_max+0x113/0x2b0 mm/memcontrol-v1.c:1480
mem_cgroup_write+0x295/0x3a0 mm/memcontrol-v1.c:1662
cgroup_file_write+0x1ec/0x790 kernel/cgroup/cgroup.c:4312
kernfs_fop_write_iter+0x3ac/0x570 fs/kernfs/file.c:352
iter_file_splice_write+0xa24/0x12e0 fs/splice.c:738
do_splice_from fs/splice.c:938 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1161
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1105
do_splice_direct_actor fs/splice.c:1204 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1230
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1431 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff6c5d8eec9
RSP: 002b:00007ff6c6c0c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ff6c5fe6090 RCX: 00007ff6c5d8eec9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005
RBP: 00007ff6c5e11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff6c5fe6128 R14: 00007ff6c5fe6090 R15: 00007fff474dcf68
INFO: task syz.3.34:6070 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.34 state:D stack:26264 pid:6070 tgid:6070 ppid:5841 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7026
io_schedule+0xbf/0x130 kernel/sched/core.c:7871
bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x93d/0x1320 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1241
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:242
ext4_reserve_inode_write+0x1be/0x340 fs/ext4/inode.c:6326
__ext4_mark_inode_dirty+0x197/0x870 fs/ext4/inode.c:6501
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6538
__mark_inode_dirty+0x1eb/0xe40 fs/fs-writeback.c:2566
generic_update_time+0xcf/0xf0 fs/inode.c:2105
inode_update_time fs/inode.c:2118 [inline]
__file_update_time fs/inode.c:2345 [inline]
file_update_time+0x17d/0x1c0 fs/inode.c:2375
ext4_page_mkwrite+0x33d/0x1880 fs/ext4/inode.c:6704
do_page_mkwrite+0x171/0x380 mm/memory.c:3361
do_shared_fault mm/memory.c:5649 [inline]
do_fault mm/memory.c:5711 [inline]
do_pte_missing+0x29d/0x3ba0 mm/memory.c:4234
handle_pte_fault mm/memory.c:6052 [inline]
__handle_mm_fault+0x152a/0x2a50 mm/memory.c:6195
handle_mm_fault+0x589/0xd10 mm/memory.c:6364
do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fa69f86eefa
RSP: 002b:00007ffc4e2d5490 EFLAGS: 00010202
RAX: 0000001b31d23000 RBX: 00007fa6a0715720 RCX: 0000001b31d22ff8
RDX: 0000001b31924220 RSI: 0000000000000008 RDI: 00007fa6a0715720
RBP: ffffffff8aed1908 R08: 00007fa69fbe6038 R09: 00007fa69fbd2000
R10: 00007fa69f3ff008 R11: 0000000000000018 R12: 0000000000000018
R13: 00000000000001ca R14: ffffffff8aed1f93 R15: 000000000000032a
INFO: task syz.1.35:6073 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.35 state:D stack:27128 pid:6073 tgid:6073 ppid:5845 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7026
io_schedule+0xbf/0x130 kernel/sched/core.c:7871
bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x93d/0x1320 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1241
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:242
ext4_reserve_inode_write+0x1be/0x340 fs/ext4/inode.c:6326
__ext4_mark_inode_dirty+0x197/0x870 fs/ext4/inode.c:6501
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6538
__mark_inode_dirty+0x1eb/0xe40 fs/fs-writeback.c:2566
generic_update_time+0xcf/0xf0 fs/inode.c:2105
inode_update_time fs/inode.c:2118 [inline]
touch_atime+0x4f0/0x5d0 fs/inode.c:2190
file_accessed include/linux/fs.h:2663 [inline]
ext4_file_mmap_prepare+0x4a6/0x5a0 fs/ext4/file.c:828
vfs_mmap_prepare include/linux/fs.h:2400 [inline]
call_mmap_prepare mm/vma.c:2585 [inline]
__mmap_region+0xee2/0x27b0 mm/vma.c:2653
mmap_region+0x32b/0x3f0 mm/vma.c:2739
do_mmap+0xa3e/0x1210 mm/mmap.c:558
vm_mmap_pgoff+0x29e/0x470 mm/util.c:580
ksys_mmap_pgoff+0x32c/0x5c0 mm/mmap.c:604
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7057d8ef03
RSP: 002b:00007ffdc8a76668 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000001b31764000 RCX: 00007f7057d8ef03
RDX: 0000000000000003 RSI: 00000000005c0000 RDI: 0000001b31764000
RBP: 0000000000600000 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000100001 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000927c0 R14: 00000000000183b4 R15: 00007ffdc8a76950
Showing all locks held in the system:
1 lock held by rcu_exp_gp_kthr/18:
#0: ffff8880b863a458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:646 [inline]
#0: ffff8880b863a458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:631
1 lock held by khungtaskd/31:
#0: ffffffff8e1c3320 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e1c3320 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e1c3320 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6775
4 locks held by klogd/5201:
#0: ffff8880b863a458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:646 [inline]
#0: ffff8880b863a458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:631
#1: ffff8880b8624088 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:220 [inline]
#1: ffff8880b8624088 (psi_seq){-.-.}-{0:0}, at: __schedule+0x1861/0x5de0 kernel/sched/core.c:6923
#2: ffff8880b8624088 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:220 [inline]
#2: ffff8880b8624088 (psi_seq){-.-.}-{0:0}, at: __schedule+0x1861/0x5de0 kernel/sched/core.c:6923
#3: ffff8880b863a458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:646 [inline]
#3: ffff8880b863a458 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:631
2 locks held by getty/5604:
#0: ffff88814e0150a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900036bb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
3 locks held by syz-executor/5829:
#0: ffff88802587d088 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11b/0x530 mm/mmap_lock.c:147
#1: ffff8880343aa520 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3361
#2: ffff8880343ae950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
3 locks held by syz.0.31/6063:
#0: ffff88802f1021c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11b/0x530 mm/mmap_lock.c:147
#1: ffff8880343aa520 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3361
#2: ffff8880343ae950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
3 locks held by syz.0.31/6065:
#0: ffff88807bd30428 (sb_writers#10){.+.+}-{0:0}, at: splice_direct_to_actor+0x345/0xa30 fs/splice.c:1105
#1: ffff88802441bc88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x28f/0x570 fs/kernfs/file.c:343
#2: ffff8880594655a8 (kn->active#58){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff8880594655a8 (kn->active#58){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2ff/0x570 fs/kernfs/file.c:344
3 locks held by syz.3.34/6070:
#0: ffff888078e1f588 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11b/0x530 mm/mmap_lock.c:147
#1: ffff8880343aa520 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3361
#2: ffff8880343ae950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
3 locks held by syz.1.35/6073:
#0: ffff88803268ed60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline]
#0: ffff88803268ed60 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1f5/0x470 mm/util.c:578
#1: ffff8880343aa428 (sb_writers#4){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2663 [inline]
#1: ffff8880343aa428 (sb_writers#4){.+.+}-{0:0}, at: ext4_file_mmap_prepare+0x4a6/0x5a0 fs/ext4/file.c:828
#2: ffff8880343ae950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
2 locks held by dhcpcd/6096:
#0: ffff88802ae34258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1669 [inline]
#0: ffff88802ae34258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf60 net/packet/af_packet.c:3251
#1: ffffffff8e1ce8b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a3/0x3c0 kernel/rcu/tree_exp.h:343
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
watchdog+0xf0e/0x1260 kernel/hung_task.c:491
kthread+0x3c2/0x780 kernel/kthread.c:463
ret_from_fork+0x56d/0x730 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: 89 5e 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 43 b7 1c 00 fb f4 bc 09 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffffff8de07e08 EFLAGS: 000002c6
RAX: 000000000014b871 RBX: 0000000000000000 RCX: ffffffff8b4d4f19
RDX: 0000000000000000 RSI: ffffffff8d9b4b00 RDI: ffffffff8bd00dc0
RBP: fffffbfff1bd2f00 R08: 0000000000000001 R09: ffffed10170c6655
R10: ffff8880b86332ab R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8de97800 R14: ffffffff905fae90 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888124e79000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005576e6739660 CR3: 000000000df82000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:757
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:190 [inline]
do_idle+0x38d/0x500 kernel/sched/idle.c:330
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:428
rest_init+0x16b/0x2b0 init/main.c:745
start_kernel+0x3f3/0x4e0 init/main.c:1099
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148