INFO: task syz.0.599:6632 blocked for more than 147 seconds.
Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.599 state:D stack:25056 pid: 6632 ppid: 4171 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5029 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6375
schedule+0x11b/0x1f0 kernel/sched/core.c:6458
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6517
rwsem_down_read_slowpath+0x605/0xb40 kernel/locking/rwsem.c:1055
__down_read_common kernel/locking/rwsem.c:1239 [inline]
__down_read kernel/locking/rwsem.c:1252 [inline]
down_read_nested+0x9c/0x2f0 kernel/locking/rwsem.c:1624
xfs_ilock+0x1c0/0x390 fs/xfs/xfs_inode.c:195
__xfs_filemap_fault+0x3ec/0x950 fs/xfs/xfs_file.c:1345
do_page_mkwrite+0x1a9/0x440 mm/memory.c:2922
wp_page_shared+0x179/0x690 mm/memory.c:3259
handle_pte_fault mm/memory.c:4668 [inline]
__handle_mm_fault mm/memory.c:4785 [inline]
handle_mm_fault+0x2a3d/0x5960 mm/memory.c:4883
faultin_page mm/gup.c:976 [inline]
__get_user_pages+0x4ed/0x11d0 mm/gup.c:1197
faultin_vma_page_range+0x21f/0x2a0 mm/gup.c:1590
madvise_populate mm/madvise.c:856 [inline]
madvise_vma mm/madvise.c:1004 [inline]
do_madvise+0xbca/0x3470 mm/madvise.c:1207
__do_sys_madvise mm/madvise.c:1233 [inline]
__se_sys_madvise mm/madvise.c:1231 [inline]
__x64_sys_madvise+0xa1/0xb0 mm/madvise.c:1231
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f027e4cf169
RSP: 002b:00007f027c317038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f027e6e8080 RCX: 00007f027e4cf169
RDX: 0000000000000017 RSI: 0000000000600000 RDI: 0000200000000000
RBP: 00007f027e5502a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f027e6e8080 R15: 00007ffeef943bc8
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1f4e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
5 locks held by kworker/u4:4/1233:
2 locks held by udevd/3545:
#0: ffff888020e47d18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:820
#1: ffff888147344468 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x68/0x100 drivers/block/loop.c:2055
1 lock held by dhcpcd/3837:
#0: ffffffff8dc43ac8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x2a5/0x1ae0 net/ipv4/devinet.c:1077
2 locks held by getty/3933:
#0: ffff88814c629098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900026362e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
5 locks held by kworker/1:5/4218:
3 locks held by kworker/u4:7/4266:
#0: ffff8881429b8938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc900032efd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2:
ffff888079b1a0e0
(&type->s_umount_key#87){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
2 locks held by kworker/1:8/4374:
5 locks held by syz.0.599/6613:
#0: ffff888079b1a460 (sb_writers#19){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3042 [inline]
#0: ffff888079b1a460 (sb_writers#19){.+.+}-{0:0}, at: vfs_fallocate+0x4bd/0x6b0 fs/open.c:307
#1: ffff88805eadd580 (&sb->s_type->i_mutex_key#25){+.+.}-{3:3}, at: xfs_ilock+0xec/0x390 fs/xfs/xfs_inode.c:184
#2: ffff88805eadd720 (mapping.invalidate_lock#3){++++}-{3:3}, at: xfs_ilock+0x17d/0x390 fs/xfs/xfs_inode.c:192
#3: ffff888079b1a650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x20f/0x1180 fs/xfs/libxfs/xfs_bmap.c:4573
#4: ffffffff8cb1f4e0 (rcu_read_lock){....}-{1:2}, at: debug_object_deactivate+0x63/0x380 lib/debugobjects.c:749
3 locks held by syz.0.599/6632:
#0:
ffff88807de87128
(
&mm->mmap_lock
){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
){++++}-{3:3}, at: do_madvise+0x37f/0x3470 mm/madvise.c:1174
#1:
ffff888079b1a558
(
sb_pagefaults
#3
){.+.+}-{0:0}
, at: do_page_mkwrite+0x1a9/0x440 mm/memory.c:2922
#2:
ffff88805eadd720
(
mapping.invalidate_lock#3
){++++}-{3:3}, at: xfs_ilock+0x1c0/0x390 fs/xfs/xfs_inode.c:195
1 lock held by syz.1.877/8115:
#0: ffffffff8dc43ac8 (rtnl_mutex){+.+.}-{3:3}, at: wext_ioctl_dispatch+0xb9/0x460 net/wireless/wext-core.c:996
1 lock held by syz.7.878/8119:
#0: ffff888147344468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xa9/0xbe0 drivers/block/loop.c:1365
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 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+0xe72/0xeb0 kernel/hung_task.c:369
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8125 Comm: dhcpcd-run-hook Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__rb_insert lib/rbtree.c:116 [inline]
RIP: 0010:__rb_insert_augmented+0xa8/0x600 lib/rbtree.c:459
Code: 00 48 89 6c 24 28 4c 89 64 24 10 4c 8d 63 08 4d 89 e5 49 c1 ed 03 43 80 7c 3d 00 00 74 08 4c 89 e7 e8 fc 25 92 fd 49 8b 2c 24 <4c> 39 f5 74 41 48 85 ed 0f 84 e9 00 00 00 49 89 ec 49 c1 ec 03 43
RSP: 0018:ffffc900036df8c8 EFLAGS: 00000246
RAX: 1ffff1100c3b10d1 RBX: ffff88807ed37aa8 RCX: 0000000000000000
RDX: ffffffff81b695c0 RSI: ffff88802427ada8 RDI: ffff888061d88688
RBP: ffff88801c330898 R08: dffffc0000000000 R09: ffff888061d88690
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807ed37ab0
R13: 1ffff1100fda6f56 R14: ffff88801c330898 R15: dffffc0000000000
FS: 00007fb77db02380(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffebacfafc4 CR3: 00000000273be000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
dup_mmap kernel/fork.c:587 [inline]
dup_mm kernel/fork.c:1466 [inline]
copy_mm+0xb58/0x1370 kernel/fork.c:1518
copy_process+0x1816/0x3ef0 kernel/fork.c:2205
kernel_clone+0x210/0x960 kernel/fork.c:2603
__do_sys_clone kernel/fork.c:2720 [inline]
__se_sys_clone kernel/fork.c:2704 [inline]
__x64_sys_clone+0x237/0x2a0 kernel/fork.c:2704
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb77dc3ca12
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:00007ffebacfa588 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fb77dc3ca12
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 000056508394afd0 R08: 0000000000000000 R09: 0000000000000008
R10: 00007fb77db02650 R11: 0000000000000246 R12: 0000000000000084
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000024
</TASK>