INFO: task syz-fuzzer:4468 blocked for more than 140 seconds.
Not tainted 4.18.0-rc3+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-fuzzer D20032 4468 4460 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
schedule+0xfb/0x450 kernel/sched/core.c:3548
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
__sb_start_write+0x2d7/0x300 fs/super.c:1403
sb_start_pagefault include/linux/fs.h:1583 [inline]
ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6125
do_page_mkwrite+0x14e/0x520 mm/memory.c:2380
wp_page_shared mm/memory.c:2676 [inline]
do_wp_page+0xf78/0x19b0 mm/memory.c:2776
handle_pte_fault mm/memory.c:3988 [inline]
__handle_mm_fault+0x2a84/0x4460 mm/memory.c:4096
handle_mm_fault+0x53e/0xc80 mm/memory.c:4133
__do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1396
do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1471
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1160
RIP: 0033:0x70b5e1
Code: 48 89 6c 24 10 48 8d 6c 24 10 48 8b 44 24 20 48 8b 48 08 48 8b 50 10 48 8d 58 08 48 83 fa 08 0f 8c 1e 01 00 00 48 8b 54 24 28 <88> 11 48 8b 48 08 48 8b 70 10 48 83 fe 01 0f 86 44 01 00 00 48 89
RSP: 002b:000000c424f02e80 EFLAGS: 00010212
RAX: 000000c424f031c0 RBX: 000000c424f031c8 RCX: 00007f4a8b774000
RDX: 0000000000000756 RSI: 0000000000000000 RDI: 00000000000007a8
RBP: 000000c424f02e90 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000095bb32 R11: 0000000000000004 R12: 0000000000000000
R13: 0000000000000020 R14: 0000000000000013 R15: 000000c424f03330
INFO: task syz-fuzzer:4477 blocked for more than 140 seconds.
Not tainted 4.18.0-rc3+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-fuzzer D20032 4477 4460 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
schedule+0xfb/0x450 kernel/sched/core.c:3548
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
__sb_start_write+0x2d7/0x300 fs/super.c:1403
sb_start_pagefault include/linux/fs.h:1583 [inline]
ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6125
do_page_mkwrite+0x14e/0x520 mm/memory.c:2380
wp_page_shared mm/memory.c:2676 [inline]
do_wp_page+0xf78/0x19b0 mm/memory.c:2776
handle_pte_fault mm/memory.c:3988 [inline]
__handle_mm_fault+0x2a84/0x4460 mm/memory.c:4096
handle_mm_fault+0x53e/0xc80 mm/memory.c:4133
__do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1396
do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1471
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1160
RIP: 0033:0x70b5e1
Code: 48 89 6c 24 10 48 8d 6c 24 10 48 8b 44 24 20 48 8b 48 08 48 8b 50 10 48 8d 58 08 48 83 fa 08 0f 8c 1e 01 00 00 48 8b 54 24 28 <88> 11 48 8b 48 08 48 8b 70 10 48 83 fe 01 0f 86 44 01 00 00 48 89
RSP: 002b:000000c424efee80 EFLAGS: 00010212
RAX: 000000c424eff1c0 RBX: 000000c424eff1c8 RCX: 00007f4a8ff74000
RDX: 0000000000000756 RSI: 0000000000000000 RDI: 00000000000008e8
RBP: 000000c424efee90 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000095bb32 R11: 0000000000000004 R12: 0000000000000000
R13: 0000000000000020 R14: 0000000000000013 R15: 000000c424eff330
INFO: task syz-executor2:4490 blocked for more than 140 seconds.
Not tainted 4.18.0-rc3+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2 D21352 4490 4481 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
schedule+0xfb/0x450 kernel/sched/core.c:3548
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
__sb_start_write+0x2d7/0x300 fs/super.c:1403
sb_start_write include/linux/fs.h:1554 [inline]
mnt_want_write+0x3f/0xc0 fs/namespace.c:386
do_unlinkat+0x2b7/0xa30 fs/namei.c:4055
__do_sys_unlink fs/namei.c:4120 [inline]
__se_sys_unlink fs/namei.c:4118 [inline]
__x64_sys_unlink+0x42/0x50 fs/namei.c:4118
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b77
Code: c0 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 8d 7e 20 40 80 <ff> 10 73 64 48 83 fa 02 7e c2 0f b6 54 0b 01 8d 7a 80 40 80 ff 3f
RSP: 002b:00007ffc3451bdd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77
RDX: 00007ffc3451bde0 RSI: 00007ffc3451be70 RDI: 00007ffc3451be70
RBP: 00007ffc3451db80 R08: 0000000000000000 R09: 0000000000000010
R10: 000000000000000a R11: 0000000000000206 R12: 0000000000daf940
R13: 0000000000000000 R14: 00007ffc3451d550 R15: 0000000000702140
INFO: task syz-executor6:4493 blocked for more than 140 seconds.
Not tainted 4.18.0-rc3+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor6 D21232 4493 4485 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
schedule+0xfb/0x450 kernel/sched/core.c:3548
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
__sb_start_write+0x2d7/0x300 fs/super.c:1403
sb_start_write include/linux/fs.h:1554 [inline]
mnt_want_write+0x3f/0xc0 fs/namespace.c:386
do_unlinkat+0x2b7/0xa30 fs/namei.c:4055
__do_sys_unlink fs/namei.c:4120 [inline]
__se_sys_unlink fs/namei.c:4118 [inline]
__x64_sys_unlink+0x42/0x50 fs/namei.c:4118
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b77
Code: c0 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 8d 7e 20 40 80 <ff> 10 73 64 48 83 fa 02 7e c2 0f b6 54 0b 01 8d 7a 80 40 80 ff 3f
RSP: 002b:00007ffc1ae525d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77
RDX: 00007ffc1ae525e0 RSI: 00007ffc1ae52670 RDI: 00007ffc1ae52670
RBP: 00007ffc1ae54380 R08: 0000000000000000 R09: 0000000000000010
R10: 000000000000000a R11: 0000000000000206 R12: 00000000021d7940
R13: 0000000000000000 R14: 00007ffc1ae53d50 R15: 0000000000702140
INFO: task syz-executor7:30934 blocked for more than 140 seconds.
Not tainted 4.18.0-rc3+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor7 D24904 30934 4488 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
schedule+0xfb/0x450 kernel/sched/core.c:3548
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
__sb_start_write+0x2d7/0x300 fs/super.c:1403
sb_start_pagefault include/linux/fs.h:1583 [inline]
ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6125
do_page_mkwrite+0x14e/0x520 mm/memory.c:2380
wp_page_shared mm/memory.c:2676 [inline]
do_wp_page+0xf78/0x19b0 mm/memory.c:2776
handle_pte_fault mm/memory.c:3988 [inline]
__handle_mm_fault+0x2a84/0x4460 mm/memory.c:4096
handle_mm_fault+0x53e/0xc80 mm/memory.c:4133
__do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1396
do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1471
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1160
RIP: 0033:0x4084b0
Code: 24 1f e9 d2 00 00 00 48 ff c2 48 83 fa 08 0f 83 ad 00 00 00 84 01 0f b6 1c 11 38 d8 75 e9 48 89 54 24 20 48 8b 5c 24 48 0f b6 <73> 50 48 0f af f2 0f b6 5b 51 48 89 cf 48 8d 74 3e 08 84 db 74 7c
RSP: 002b:00007ffdc5e32710 EFLAGS: 00010283
RAX: 0000001b33b202e0 RBX: 0000000000000000 RCX: 0000001b34b20000
RDX: 0000001b33b202e4 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffdc5e32750 R11: 0000000000000246 R12: 0000000000000009
R13: 0000000000000002 R14: 000000000072bea0 R15: 000000000072bea0
INFO: task syz-executor5:30937 blocked for more than 140 seconds.
Not tainted 4.18.0-rc3+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor5 D20200 30937 4491 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
schedule+0xfb/0x450 kernel/sched/core.c:3548
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
__sb_start_write+0x2d7/0x300 fs/super.c:1403
sb_start_pagefault include/linux/fs.h:1583 [inline]
ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6125
do_page_mkwrite+0x14e/0x520 mm/memory.c:2380
wp_page_shared mm/memory.c:2676 [inline]
do_wp_page+0xf78/0x19b0 mm/memory.c:2776
handle_pte_fault mm/memory.c:3988 [inline]
__handle_mm_fault+0x2a84/0x4460 mm/memory.c:4096
handle_mm_fault+0x53e/0xc80 mm/memory.c:4133
__do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1396
do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1471
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1160
RIP: 0033:0x4084b0
Code: 24 1f e9 d2 00 00 00 48 ff c2 48 83 fa 08 0f 83 ad 00 00 00 84 01 0f b6 1c 11 38 d8 75 e9 48 89 54 24 20 48 8b 5c 24 48 0f b6 <73> 50 48 0f af f2 0f b6 5b 51 48 89 cf 48 8d 74 3e 08 84 db 74 7c
RSP: 002b:00007ffef4cc2fa0 EFLAGS: 00010287
RAX: 0000001b2c022750 RBX: 0000000000000000 RCX: 0000001b2d020000
RDX: 0000001b2c022754 RSI: 0000000000730220 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffef4cc2fe0 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000002 R14: 000000000072bea0 R15: 000000000072bea0
INFO: task syz-executor1:30942 blocked for more than 140 seconds.
Not tainted 4.18.0-rc3+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1 D24904 30942 4486 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
schedule+0xfb/0x450 kernel/sched/core.c:3548
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
__sb_start_write+0x2d7/0x300 fs/super.c:1403
sb_start_pagefault include/linux/fs.h:1583 [inline]
ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6125
do_page_mkwrite+0x14e/0x520 mm/memory.c:2380
wp_page_shared mm/memory.c:2676 [inline]
do_wp_page+0xf78/0x19b0 mm/memory.c:2776
handle_pte_fault mm/memory.c:3988 [inline]
__handle_mm_fault+0x2a84/0x4460 mm/memory.c:4096
handle_mm_fault+0x53e/0xc80 mm/memory.c:4133
__do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1396
do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1471
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1160
RIP: 0033:0x4084b0
Code: 24 1f e9 d2 00 00 00 48 ff c2 48 83 fa 08 0f 83 ad 00 00 00 84 01 0f b6 1c 11 38 d8 75 e9 48 89 54 24 20 48 8b 5c 24 48 0f b6 <73> 50 48 0f af f2 0f b6 5b 51 48 89 cf 48 8d 74 3e 08 84 db 74 7c
RSP: 002b:00007ffccf8a8750 EFLAGS: 00010283
RAX: 0000001b2bc20004 RBX: 0000000000000000 RCX: 0000001b2cc20000
RDX: 0000001b2bc20008 RSI: 0000000000730558 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007ffccf8a0000 R09: 0000000000000000
R10: 00007ffccf8a8790 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000002 R14: 000000000072bea0 R15: 000000000072bea0
INFO: task syz-executor3:30944 blocked for more than 140 seconds.
Not tainted 4.18.0-rc3+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3 D26568 30944 4489 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
schedule+0xfb/0x450 kernel/sched/core.c:3548
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
__sb_start_write+0x2d7/0x300 fs/super.c:1403
sb_start_write include/linux/fs.h:1554 [inline]
mnt_want_write+0x3f/0xc0 fs/namespace.c:386
filename_create+0x13e/0x5b0 fs/namei.c:3640
user_path_create fs/namei.c:3703 [inline]
do_symlinkat+0xfe/0x2d0 fs/namei.c:4157
__do_sys_symlink fs/namei.c:4183 [inline]
__se_sys_symlink fs/namei.c:4181 [inline]
__x64_sys_symlink+0x59/0x80 fs/namei.c:4181
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b57
Code: 80 80 fa 3f 77 10 83 e6 1f c1 e6 06 83 e1 3f 09 ce 83 fe 7f 7f 19 c7 44 24 28 fd ff 00 00 48 ff c0 48 89 44 24 30 48 8b 2c 24 <48> 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24
RSP: 002b:00007ffd4b55ce58 EFLAGS: 00000217 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000000455b57
RDX: 0000000000000000 RSI: 00000000004bb371 RDI: 00007ffd4b55db50
RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000fc7940
R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffd4b55d500 R15: 00000000007034c0
INFO: task syz-executor0:30945 blocked for more than 140 seconds.
Not tainted 4.18.0-rc3+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0 D26568 30945 4487 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
schedule+0xfb/0x450 kernel/sched/core.c:3548
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
__sb_start_write+0x2d7/0x300 fs/super.c:1403
sb_start_write include/linux/fs.h:1554 [inline]
mnt_want_write+0x3f/0xc0 fs/namespace.c:386
filename_create+0x13e/0x5b0 fs/namei.c:3640
user_path_create fs/namei.c:3703 [inline]
do_symlinkat+0xfe/0x2d0 fs/namei.c:4157
__do_sys_symlink fs/namei.c:4183 [inline]
__se_sys_symlink fs/namei.c:4181 [inline]
__x64_sys_symlink+0x59/0x80 fs/namei.c:4181
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b57
Code: 80 80 fa 3f 77 10 83 e6 1f c1 e6 06 83 e1 3f 09 ce 83 fe 7f 7f 19 c7 44 24 28 fd ff 00 00 48 ff c0 48 89 44 24 30 48 8b 2c 24 <48> 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24
RSP: 002b:00007ffc8509bab8 EFLAGS: 00000217 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000000455b57
RDX: 0000000000000000 RSI: 00000000004bb371 RDI: 00007ffc8509c7b0
RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000cd8940
R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffc8509c160 R15: 00000000007034c0
INFO: task syz-executor4:30948 blocked for more than 140 seconds.
Not tainted 4.18.0-rc3+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor4 D25360 30948 4492 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
schedule+0xfb/0x450 kernel/sched/core.c:3548
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
__percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
__sb_start_write+0x2d7/0x300 fs/super.c:1403
sb_start_write include/linux/fs.h:1554 [inline]
mnt_want_write+0x3f/0xc0 fs/namespace.c:386
filename_create+0x13e/0x5b0 fs/namei.c:3640
user_path_create fs/namei.c:3703 [inline]
do_symlinkat+0xfe/0x2d0 fs/namei.c:4157
__do_sys_symlink fs/namei.c:4183 [inline]
__se_sys_symlink fs/namei.c:4181 [inline]
__x64_sys_symlink+0x59/0x80 fs/namei.c:4181
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b57
Code: 80 80 fa 3f 77 10 83 e6 1f c1 e6 06 83 e1 3f 09 ce 83 fe 7f 7f 19 c7 44 24 28 fd ff 00 00 48 ff c0 48 89 44 24 30 48 8b 2c 24 <48> 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24
RSP: 002b:00007ffd27c90ea8 EFLAGS: 00000217 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000000455b57
RDX: 0000000000000000 RSI: 00000000004bb371 RDI: 00007ffd27c91ba0
RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000001689940
R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffd27c91550 R15: 00000000007034c0
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 901 Comm: khungtaskd Not tainted 4.18.0-rc3+ #48
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.5+0x19/0xce lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline]
watchdog+0x9c4/0xf80 kernel/hung_task.c:252
kthread+0x345/0x410 kernel/kthread.c:240
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54