INFO: task syz.9.455:11964 blocked for more than 143 seconds.
Not tainted 6.14.0-syzkaller-00624-g2f2d52945852 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.455 state:D stack:23456 pid:11964 tgid:11963 ppid:11007 task_flags:0x440140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5373 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6760
__schedule_loop kernel/sched/core.c:6837 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6852
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6909
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
page_cache_ra_order+0x45d/0xca0 mm/readahead.c:491
filemap_get_pages+0x59a/0x1fb0 mm/filemap.c:2590
filemap_splice_read+0x68e/0xef0 mm/filemap.c:2980
do_splice_read fs/splice.c:979 [inline]
splice_direct_to_actor+0x4af/0xc80 fs/splice.c:1083
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x289/0x3e0 fs/splice.c:1227
do_sendfile+0x564/0x8a0 fs/read_write.c:1368
__do_sys_sendfile64 fs/read_write.c:1429 [inline]
__se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1415
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8316b8d169
RSP: 002b:00007f83179e5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f8316da5fa0 RCX: 00007f8316b8d169
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007f8316c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8316da5fa0 R15: 00007ffc51250228
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8eb39420 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb39420 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb39420 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
3 locks held by kworker/u8:5/1010:
#0: ffff88814d1b7148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88814d1b7148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc90003b47c60 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90003b47c60 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffffffff8fec2308 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline]
#2: ffffffff8fec2308 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x10e/0x16a0 net/ipv6/addrconf.c:4190
2 locks held by getty/5583:
#0: ffff88803163e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032eb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
1 lock held by syz.8.403/11100:
1 lock held by syz.9.455/11964:
#0: ffff8880238a2bc0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff8880238a2bc0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45d/0xca0 mm/readahead.c:491
1 lock held by syz.5.477/12361:
#0: ffff8880238a2bc0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff8880238a2bc0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45d/0xca0 mm/readahead.c:491
1 lock held by syz.2.518/12760:
#0: ffff8880238a2bc0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff8880238a2bc0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45d/0xca0 mm/readahead.c:491
1 lock held by syz.9.599/13724:
#0: ffff8880238a2bc0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff8880238a2bc0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45d/0xca0 mm/readahead.c:491
1 lock held by syz-executor/13812:
#0: ffffffff8eb3e8f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline]
#0: ffffffff8eb3e8f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x820 kernel/rcu/tree_exp.h:996
3 locks held by syz-executor/14216:
#0: ffffffff8fec2308 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fec2308 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline]
#0: ffffffff8fec2308 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc55/0x1d30 net/core/rtnetlink.c:4021
#1: ffff88801e2c54e8 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_open+0x22d/0x420 drivers/net/wireguard/device.c:50
#2: ffffffff8eb3e8f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline]
#2: ffffffff8eb3e8f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x820 kernel/rcu/tree_exp.h:996
2 locks held by syz.2.658/14344:
2 locks held by dhcpcd-run-hook/14373:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-syzkaller-00624-g2f2d52945852 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 14373 Comm: dhcpcd-run-hook Not tainted 6.14.0-syzkaller-00624-g2f2d52945852 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x18/0x90 kernel/kcov.c:314
Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 4c 8b 04 24 65 48 8b 14 25 00 d5 03 00 65 8b 05 e0 df 41 7e <25> 00 01 ff 00 74 10 3d 00 01 00 00 75 5b 83 ba 2c 16 00 00 00 74
RSP: 0018:ffffc90004ddf648 EFLAGS: 00000206
RAX: 0000000080000000 RBX: 0000000000000001 RCX: ffff88802e025a00
RDX: ffff88802e025a00 RSI: 0000000000000001 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff8bfbacfd R09: ffffffff8bfbaae4
R10: 0000000000000004 R11: ffff88802e025a00 R12: ffffc90004ddf97d
R13: ffff88805f1cd000 R14: ffff88805f1cd050 R15: 0000000000000003
FS: 00007fd086ec6380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff2b7c8fa4 CR3: 000000003b1ae000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mas_next_node+0x62d/0xe00 lib/maple_tree.c:4607
mas_next_slot+0x456/0xea0 lib/maple_tree.c:4699
mas_find+0x950/0xbb0 lib/maple_tree.c:6018
vma_next include/linux/mm.h:1020 [inline]
dup_mmap kernel/fork.c:665 [inline]
dup_mm kernel/fork.c:1700 [inline]
copy_mm+0x12af/0x2170 kernel/fork.c:1752
copy_process+0x17d1/0x3cf0 kernel/fork.c:2396
kernel_clone+0x223/0x870 kernel/fork.c:2811
__do_sys_clone kernel/fork.c:2954 [inline]
__se_sys_clone kernel/fork.c:2938 [inline]
__x64_sys_clone+0x267/0x2e0 kernel/fork.c:2938
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd087000a12
Code: 41 5d 41 5e 41 5f c3 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 e7 43 0f 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff2b7c8e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fd087000a12
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000557407f38b70 R08: 0000000000000000 R09: 0000000000000200
R10: 00007fd086ec6650 R11: 0000000000000246 R12: 0000000000000084
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000024