INFO: task syz-executor.3:27968 blocked for more than 143 seconds.
Not tainted 6.3.0-rc6-syzkaller-00046-gde4664485abb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:21528 pid:27968 ppid:16393 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760
rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock include/linux/fs.h:758 [inline]
btrfs_inode_lock+0x4d/0xd0 fs/btrfs/inode.c:177
btrfs_buffered_write+0x236/0x1610 fs/btrfs/file.c:1202
btrfs_direct_write fs/btrfs/file.c:1593 [inline]
btrfs_do_write_iter+0xea6/0x1270 fs/btrfs/file.c:1674
do_iter_write+0x6ea/0xc50 fs/read_write.c:861
iter_file_splice_write+0x843/0xfe0 fs/splice.c:778
do_splice_from fs/splice.c:856 [inline]
direct_splice_actor+0xe7/0x1c0 fs/splice.c:1022
splice_direct_to_actor+0x4c4/0xbd0 fs/splice.c:977
do_splice_direct+0x283/0x3d0 fs/splice.c:1065
do_sendfile+0x620/0xff0 fs/read_write.c:1255
__do_sys_sendfile64 fs/read_write.c:1323 [inline]
__se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efd7c88c169
RSP: 002b:00007efd7d5f2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007efd7c9ac050 RCX: 00007efd7c88c169
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007efd7c8e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffebb8e469f R14: 00007efd7d5f2300 R15: 0000000000022000
INFO: task syz-executor.3:27971 blocked for more than 144 seconds.
Not tainted 6.3.0-rc6-syzkaller-00046-gde4664485abb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:24480 pid:27971 ppid:16393 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
wait_on_state fs/btrfs/extent-io-tree.c:707 [inline]
wait_extent_bit+0x50c/0x670 fs/btrfs/extent-io-tree.c:751
lock_extent+0x1ce/0x280 fs/btrfs/extent-io-tree.c:1742
btrfs_page_mkwrite+0x554/0xc90 fs/btrfs/inode.c:8163
do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
wp_page_shared mm/memory.c:3274 [inline]
do_wp_page+0x501/0x3620 mm/memory.c:3356
handle_pte_fault mm/memory.c:4941 [inline]
__handle_mm_fault mm/memory.c:5065 [inline]
handle_mm_fault+0x23a0/0x51c0 mm/memory.c:5211
do_user_addr_fault arch/x86/mm/fault.c:1407 [inline]
handle_page_fault arch/x86/mm/fault.c:1498 [inline]
exc_page_fault+0x5b1/0x7c0 arch/x86/mm/fault.c:1554
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_short_string+0xd/0x40 arch/x86/lib/copy_user_64.S:233
Code: 74 0a 89 d1 f3 a4 89 c8 0f 01 ca c3 89 d0 0f 01 ca c3 01 ca eb e7 0f 1f 80 00 00 00 00 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 <4c> 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a
RSP: 0018:ffffc9000c9ff4d0 EFLAGS: 00050202
RAX: ffffffff84302d01 RBX: 00007fffffffefc8 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffffc9000c9ff580 RDI: 00000000200012e0
RBP: ffffc9000c9ff628 R08: 0000000000000000 R09: fffff5200193feb7
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000038
R13: ffffc9000c9ff580 R14: 00000000200012e0 R15: ffffc9000c9ff580
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
_copy_to_user+0xed/0x130 lib/usercopy.c:41
copy_to_user include/linux/uaccess.h:169 [inline]
fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:144
emit_fiemap_extent+0x242/0x3f0 fs/btrfs/extent_io.c:3002
extent_fiemap+0xfd1/0x2150 fs/btrfs/extent_io.c:3492
btrfs_fiemap+0x178/0x1e0 fs/btrfs/inode.c:7835
ioctl_fiemap fs/ioctl.c:219 [inline]
do_vfs_ioctl+0x19ba/0x2b10 fs/ioctl.c:810
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x81/0x160 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efd7c88c169
RSP: 002b:00007efd7d5d1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efd7c9ac120 RCX: 00007efd7c88c169
RDX: 00000000200012c0 RSI: 00000000c020660b RDI: 0000000000000008
RBP: 00007efd7c8e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffebb8e469f R14: 00007efd7d5d1300 R15: 0000000000022000
Showing all locks held in the system:
4 locks held by kworker/u4:0/9:
3 locks held by kworker/u4:1/11:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cf25570 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cf25d70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8cf253a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4742:
#0: ffff88802b1b0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
3 locks held by kworker/0:14/5438:
2 locks held by kworker/0:1/26452:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
#1: ffffc9000a50fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
2 locks held by syz-executor.3/27968:
#0: ffff888036c1e460 (sb_writers#16){.+.+}-{0:0}, at: do_sendfile+0x5fb/0xff0 fs/read_write.c:1254
#1: ffff8880747d75b8 (&sb->s_type->i_mutex_key#24){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff8880747d75b8 (&sb->s_type->i_mutex_key#24){++++}-{3:3}, at: btrfs_inode_lock+0x4d/0xd0 fs/btrfs/inode.c:177
4 locks held by syz-executor.3/27971:
#0: ffff8880747d75b8 (&sb->s_type->i_mutex_key#24){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff8880747d75b8 (&sb->s_type->i_mutex_key#24){++++}-{3:3}, at: btrfs_inode_lock+0x60/0xd0 fs/btrfs/inode.c:169
#1: ffff88807de91398 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#1: ffff88807de91398 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1348 [inline]
#1: ffff88807de91398 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1498 [inline]
#1: ffff88807de91398 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18e/0x7c0 arch/x86/mm/fault.c:1554
#2: ffff888036c1e558 (sb_pagefaults#3){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
#3: ffff8880747d7440 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x425/0xc90 fs/btrfs/inode.c:8152
1 lock held by syz-executor.5/30292:
#0: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#0: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:989
2 locks held by dhcpcd/30314:
#0: ffff8880442d8130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
#0: ffff8880442d8130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2a/0xbd0 net/packet/af_packet.c:3193
#1: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#1: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:989
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc6-syzkaller-00046-gde4664485abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 30319 Comm: udevadm Not tainted 6.3.0-rc6-syzkaller-00046-gde4664485abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:__kasan_check_read+0x4/0x20 mm/kasan/shadow.c:31
Code: 41 5e 41 5f 5d c3 48 c7 c7 4d 41 81 8c 48 89 de eb 0a 48 c7 c7 85 41 81 8c 4c 89 fe e8 25 00 bc 08 31 db eb d4 90 f3 0f 1e fa <89> f6 48 8b 0c 24 31 d2 e9 2f eb ff ff 66 2e 0f 1f 84 00 00 00 00
RSP: 0018:ffffc90003c5f418 EFLAGS: 00000002
RAX: 0000000000000008 RBX: 0000000000000217 RCX: ffffffff91ad3003
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff902db200
RBP: ffff888022db44e0 R08: dffffc0000000000 R09: fffffbfff205b641
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888022db44b0
R13: ffff888022db3a80 R14: ffff888022db4500 R15: 1ffff110045b68a0
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f865a23b000 CR3: 000000002ae79000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:72 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
__lock_acquire+0xcbf/0x1f80 kernel/locking/lockdep.c:5026
lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669
down_read+0x3d/0x50 kernel/locking/rwsem.c:1520
anon_vma_lock_read include/linux/rmap.h:131 [inline]
validate_mm+0x1e9/0x380 mm/mmap.c:355
remove_mt mm/mmap.c:2125 [inline]
do_vmi_align_munmap+0x105f/0x1290 mm/mmap.c:2398
do_vmi_munmap+0x24a/0x2b0 mm/mmap.c:2452
mmap_region+0x8a6/0x20c0 mm/mmap.c:2500
do_mmap+0x8c9/0xf70 mm/mmap.c:1364
vm_mmap_pgoff+0x1ce/0x2e0 mm/util.c:542
ksys_mmap_pgoff+0x4f9/0x6d0 mm/mmap.c:1410
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3f911471f2
Code: 04 00 00 5b 5d 41 5c c3 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 9e 1f 01 00 16 00
RSP: 002b:00007ffdca7f4708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f911471f2
RDX: 0000000000000001 RSI: 0000000000087000 RDI: 00007f3f90dd5000
RBP: 00007f3f90dd5000 R08: 0000000000000003 R09: 00000000001d5000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffdca7f4720
R13: 00007ffdca7f4780 R14: 0000000000000001 R15: 00007f3f91126400