INFO: task syz.0.301:7165 blocked for more than 143 seconds.
Not tainted 6.10.0-rc5-syzkaller-00280-g27b31deb900d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.301 state:D stack:27392 pid:7165 tgid:7163 ppid:5646 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
inode_lock include/linux/fs.h:791 [inline]
chmod_common+0x1bb/0x4c0 fs/open.c:644
do_fchmodat fs/open.c:698 [inline]
__do_sys_fchmodat fs/open.c:717 [inline]
__se_sys_fchmodat fs/open.c:714 [inline]
__x64_sys_fchmodat+0x120/0x1c0 fs/open.c:714
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: 0033:0x7fa3c9175b99
RSP: 002b:00007fa3c9f23048 EFLAGS: 00000246 ORIG_RAX: 000000000000010c
RAX: ffffffffffffffda RBX: 00007fa3c9304078 RCX: 00007fa3c9175b99
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007fa3c91f677e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa3c9304078 R15: 00007ffc572752e8
INFO: task syz.0.301:7166 blocked for more than 143 seconds.
Not tainted 6.10.0-rc5-syzkaller-00280-g27b31deb900d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.301 state:D stack:26208 pid:7166 tgid:7163 ppid:5646 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
inode_lock include/linux/fs.h:791 [inline]
open_last_lookups fs/namei.c:3571 [inline]
path_openat+0x7d3/0x3280 fs/namei.c:3804
do_filp_open+0x235/0x490 fs/namei.c:3834
do_sys_openat2+0x13e/0x1d0 fs/open.c:1405
do_sys_open fs/open.c:1420 [inline]
__do_sys_creat fs/open.c:1496 [inline]
__se_sys_creat fs/open.c:1490 [inline]
__x64_sys_creat+0x123/0x170 fs/open.c:1490
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: 0033:0x7fa3c9175b99
RSP: 002b:00007fa3c9f02048 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fa3c9304150 RCX: 00007fa3c9175b99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020002440
RBP: 00007fa3c91f677e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa3c9304150 R15: 00007ffc572752e8
INFO: task syz.0.301:7169 blocked for more than 144 seconds.
Not tainted 6.10.0-rc5-syzkaller-00280-g27b31deb900d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.301 state:D stack:27392 pid:7169 tgid:7163 ppid:5646 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:826 [inline]
filename_create+0x260/0x540 fs/namei.c:3900
do_mkdirat+0xbd/0x3a0 fs/namei.c:4146
__do_sys_mkdir fs/namei.c:4174 [inline]
__se_sys_mkdir fs/namei.c:4172 [inline]
__x64_sys_mkdir+0x6e/0x80 fs/namei.c:4172
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: 0033:0x7fa3c9175b99
RSP: 002b:00007fa3c9ee1048 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fa3c9304228 RCX: 00007fa3c9175b99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300
RBP: 00007fa3c91f677e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa3c9304228 R15: 00007ffc572752e8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4843:
#0: ffff88802b20b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
16 locks held by syz-executor/5087:
3 locks held by syz.0.301/7164:
2 locks held by syz.0.301/7165:
#0: ffff88805717e420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888061c5c408 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline]
#1: ffff888061c5c408 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: chmod_common+0x1bb/0x4c0 fs/open.c:644
2 locks held by syz.0.301/7166:
#0: ffff88805717e420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888061c5c408 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline]
#1: ffff888061c5c408 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: open_last_lookups fs/namei.c:3571 [inline]
#1: ffff888061c5c408 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: path_openat+0x7d3/0x3280 fs/namei.c:3804
2 locks held by syz.0.301/7169:
#0: ffff88805717e420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888061c5c408 (&sb->s_type->i_mutex_key#20/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline]
#1: ffff888061c5c408 (&sb->s_type->i_mutex_key#20/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3900
2 locks held by syz.2.311/7253:
#0: ffff88805717e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805717e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff888078a000e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6b/0x100 fs/exfat/super.c:53
2 locks held by syz.3.690/9146:
2 locks held by syz.4.685/9148:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc5-syzkaller-00280-g27b31deb900d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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:223 [inline]
watchdog+0xfde/0x1020 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4526 Comm: klogd Not tainted 6.10.0-rc5-syzkaller-00280-g27b31deb900d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:55 [inline]
RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:393 [inline]
RIP: 0010:deref_stack_reg+0x37/0x260 arch/x86/kernel/unwind_orc.c:403
Code: 28 49 89 d6 48 89 34 24 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 e9 0b 55 00 48 8d 6b 08 49 89 ec 49 c1 ec 03 43 80 3c 3c 00 <74> 08 48 89 ef e8 bf 77 b7 00 48 89 6c 24 10 4c 89 74 24 18 48 8b
RSP: 0018:ffffc90003c27208 EFLAGS: 00000246
RAX: ffffffff81411d67 RBX: ffffc90003c27340 RCX: ffff88807bec1e00
RDX: 0000000000000000 RSI: ffffc90003c27ec0 RDI: ffffc90003c27340
RBP: ffffc90003c27348 R08: 0000000000000005 R09: ffffffff8141095f
R10: 0000000000000003 R11: ffff88807bec1e00 R12: 1ffff92000784e69
R13: dffffc0000000000 R14: ffffc90003c27380 R15: dffffc0000000000
FS: 00007fac3e00e380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb13a6d1178 CR3: 000000007bfae000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0x1ab8/0x2a00 arch/x86/kernel/unwind_orc.c:648
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3940 [inline]
slab_alloc_node mm/slub.c:4002 [inline]
kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4045
__alloc_skb+0x1c3/0x440 net/core/skbuff.c:656
alloc_skb include/linux/skbuff.h:1308 [inline]
alloc_skb_with_frags+0xc3/0x770 net/core/skbuff.c:6504
sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2794
unix_dgram_sendmsg+0x6d3/0x1f80 net/unix/af_unix.c:1976
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
__sys_sendto+0x3a4/0x4f0 net/socket.c:2192
__do_sys_sendto net/socket.c:2204 [inline]
__se_sys_sendto net/socket.c:2200 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2200
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: 0033:0x7fac3e1709b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffdda9aa798 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fac3e1709b5
RDX: 0000000000000049 RSI: 00005610e27ee380 RDI: 0000000000000003
RBP: 00005610e27e5910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007fac3e2fe212 R14: 00007ffdda9aa898 R15: 0000000000000000