INFO: task syz-executor.3:7902 blocked for more than 143 seconds.
Not tainted 6.8.0-rc4-syzkaller-00331-gc1ca10ceffbb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28112 pid:7902 tgid:7899 ppid:6567 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c60 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x280 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
rwsem_down_read_slowpath+0x622/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
filemap_invalidate_lock_shared include/linux/fs.h:857 [inline]
page_cache_ra_unbounded+0x13a/0x5f0 mm/readahead.c:225
do_page_cache_ra mm/readahead.c:299 [inline]
page_cache_ra_order+0x7b7/0xa70 mm/readahead.c:544
ondemand_readahead+0x520/0x1140 mm/readahead.c:666
page_cache_sync_ra+0x174/0x1d0 mm/readahead.c:693
page_cache_sync_readahead include/linux/pagemap.h:1300 [inline]
filemap_get_pages+0xc10/0x1840 mm/filemap.c:2498
filemap_splice_read+0x5ae/0xc60 mm/filemap.c:2872
do_splice_read fs/splice.c:985 [inline]
do_splice_read+0x294/0x380 fs/splice.c:959
splice_direct_to_actor+0x2a5/0xa40 fs/splice.c:1089
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x17e/0x250 fs/splice.c:1233
do_sendfile+0xaac/0xdb0 fs/read_write.c:1295
__do_sys_sendfile64 fs/read_write.c:1362 [inline]
__se_sys_sendfile64 fs/read_write.c:1348 [inline]
__x64_sys_sendfile64+0x1da/0x220 fs/read_write.c:1348
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7ff3d667dda9
RSP: 002b:00007ff3d73730c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ff3d67ac120 RCX: 00007ff3d667dda9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000007
RBP: 00007ff3d66ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 000000000008a000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007ff3d67ac120 R15: 00007ffc2bf83488
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7ad160 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d7ad160 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d7ad160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
5 locks held by kworker/u4:4/59:
#0: ffff888014c8f938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608
#1: ffffc900015a7d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609
#2: ffffffff8f2cef10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb20 net/core/net_namespace.c:580
#3: ffffffff8f2e42e8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_delete_nets+0x95/0x410 net/ipv4/ip_tunnel.c:1139
#4: ffffffff8d7b89b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#4: ffffffff8d7b89b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x6b5/0x800 kernel/rcu/tree_exp.h:995
5 locks held by kworker/u4:8/4147:
2 locks held by getty/4813:
#0: ffff88802ada30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015d02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfca/0x1490 drivers/tty/n_tty.c:2201
3 locks held by kworker/1:4/5133:
#0: ffff88802a2add38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608
#1: ffffc9000383fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609
#2: ffffffff8f2e42e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4671
1 lock held by syz-executor.1/7677:
1 lock held by syz-executor.3/7902:
#0: ffff88801d0b3740 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:857 [inline]
#0: ffff88801d0b3740 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0x13a/0x5f0 mm/readahead.c:225
1 lock held by syz-executor.1/7981:
#0: ffff88801d0b3740 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
#0: ffff88801d0b3740 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:800
1 lock held by syz-executor.1/8256:
#0: ffff88801d0b3740 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
#0: ffff88801d0b3740 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:800
1 lock held by syz-executor.2/8813:
3 locks held by syz-executor.1/8825:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc4-syzkaller-00331-gc1ca10ceffbb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
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:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7171 Comm: syz-executor.0 Not tainted 6.8.0-rc4-syzkaller-00331-gc1ca10ceffbb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:rseq_handle_notify_resume include/linux/rseq.h:37 [inline]
RIP: 0010:resume_user_mode_work include/linux/resume_user_mode.h:62 [inline]
RIP: 0010:exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
RIP: 0010:exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
RIP: 0010:__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
RIP: 0010:syscall_exit_to_user_mode+0x199/0x2b0 kernel/entry/common.c:212
Code: 01 00 00 49 83 bc 24 88 08 00 00 00 0f 85 05 01 00 00 bf c0 0c 00 00 e8 75 e1 28 f7 e8 80 82 99 f9 49 83 bc 24 38 15 00 00 00 <0f> 84 6e ff ff ff 48 89 ee 31 ff e8 a7 63 f6 f6 e9 5f ff ff ff bf
RSP: 0018:ffffc9000344ff08 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000000000002 RCX: fffff52000689fca
RDX: ffff88805c9a0000 RSI: ffffffff845d2ade RDI: ffff88805c9a1628
RBP: ffffc9000344ff58 R08: 0000000000000cc0 R09: 0000000000000001
R10: ffffffff8f9d53d7 R11: 0000000000000000 R12: ffff88805c9a0000
R13: 00000000000000e6 R14: 0000000000000000 R15: 0000000000000000
FS: 00005555573b4480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b030 CR3: 0000000029c50000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_syscall_64+0xe5/0x270 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fcea12a91b5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffc57b680a0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 0000000000000115 RCX: 00007fcea12a91b5
RDX: 00007ffc57b680e0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc57b6816c R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000000929e2 R14: 000000000009267a R15: 0000000000000009