INFO: task syz.5.5044:24700 blocked for more than 143 seconds.
Not tainted 6.13.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.5044 state:D stack:27328 pid:24700 tgid:24690 ppid:23727 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_timeout+0x244/0x280 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:418 [inline]
do_coredump+0x82f/0x43e0 fs/coredump.c:575
get_signal+0x23f3/0x2610 kernel/signal.c:3002
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f97d4b85d19
RSP: 002b:00007f97d58e90e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f97d4d76248 RCX: 00007f97d4b85d19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f97d4d7624c
RBP: 00007f97d4d76240 R08: 00007f97d594d000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f97d4d7624c
R13: 0000000000000000 R14: 00007ffd9bfe4180 R15: 00007ffd9bfe4268
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8ddba940 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8ddba940 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ddba940 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
4 locks held by kworker/u8:41/16051:
2 locks held by getty/16244:
#0: ffff88814d0620a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000d4632f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by syz.5.5044/24710:
1 lock held by syz-executor/26021:
3 locks held by syz.8.5422/26426:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xf14/0x1240 kernel/hung_task.c:397
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
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: 24710 Comm: syz.5.5044 Not tainted 6.13.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x70 kernel/kcov.c:217
Code: 6a 7e a9 00 01 ff 00 48 8b 34 24 74 1d f6 c4 01 74 43 a9 00 00 0f 00 75 3c a9 00 00 f0 00 75 35 8b 82 1c 16 00 00 85 c0 74 2b <8b> 82 f8 15 00 00 83 f8 02 75 20 48 8b 8a 00 16 00 00 8b 92 fc 15
RSP: 0018:ffffc900001077f0 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffff88802e96d9b0 RCX: ffffffff8b11194f
RDX: ffff888028f58000 RSI: ffffffff8b11195d RDI: 0000000000000005
RBP: ffff8880795513c0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000008
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000002020fff
FS: 00007f97d1dcf6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000036000 CR3: 00000000647de000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mt_external_lock include/linux/maple_tree.h:787 [inline]
mt_locked lib/maple_tree.c:796 [inline]
mt_slot lib/maple_tree.c:803 [inline]
mtree_range_walk+0x1bd/0xbe0 lib/maple_tree.c:2802
mas_state_walk lib/maple_tree.c:3620 [inline]
mt_find+0x5ad/0xa20 lib/maple_tree.c:6929
find_vma+0xc0/0x140 mm/mmap.c:957
lock_mm_and_find_vma+0x62/0x6a0 mm/memory.c:6212
do_user_addr_fault+0x2b5/0x13f0 arch/x86/mm/fault.c:1361
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1
RSP: 0018:ffffc90000107bc8 EFLAGS: 00050246
RAX: 0000000000000001 RBX: 0000000000036000 RCX: 0000000000000040
RDX: fffff52000020fbb RSI: ffffc90000107d98 RDI: 0000000000036000
RBP: ffffc90000107e88 R08: 0000000000000000 R09: fffff52000020fba
R10: ffffc90000107dd7 R11: 0000000000000000 R12: 0000000000036040
R13: 00007ffffffff000 R14: ffffc90000107d98 R15: 0000000000000040
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline]
copy_to_user_iter lib/iov_iter.c:25 [inline]
iterate_ubuf include/linux/iov_iter.h:30 [inline]
iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
_copy_to_iter+0x384/0x1400 lib/iov_iter.c:185
copy_to_iter include/linux/uio.h:211 [inline]
get_random_bytes_user+0x180/0x3c0 drivers/char/random.c:472
__do_sys_getrandom drivers/char/random.c:1414 [inline]
__se_sys_getrandom drivers/char/random.c:1388 [inline]
__x64_sys_getrandom+0x184/0x290 drivers/char/random.c:1388
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f97d4b85d19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f97d1dcf038 EFLAGS: 00000246 ORIG_RAX: 000000000000013e
RAX: ffffffffffffffda RBX: 00007f97d4d76400 RCX: 00007f97d4b85d19
RDX: 0000000000000003 RSI: 0000000006000000 RDI: 0000000000000000
RBP: 00007f97d4c01a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f97d4d76400 R15: 00007ffd9bfe4268