bisecting fixing commit since 97a8651cadce7c2b7c4d8f108b392eff31fe2c08 building syzkaller on 77e2b66864e69c17416614228723a1ebd3581ddc testing commit 97a8651cadce7c2b7c4d8f108b392eff31fe2c08 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6872524c1c747fdf8a02e5a623dc96ca20502111fe20992a6fcba5bf8758ce89 all runs: crashed: INFO: task hung in paste_selection testing current HEAD c2276d585654e8d573366c29c565043ec36adf63 testing commit c2276d585654e8d573366c29c565043ec36adf63 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9d30e1af92585b0a05e857e970f5d7651feac4689756131dbee73418be55f1bb run #0: crashed: INFO: task hung in tty_ioctl run #1: crashed: INFO: task hung in paste_selection run #2: crashed: INFO: task hung in tty_ioctl run #3: crashed: INFO: task hung in tty_ioctl run #4: crashed: INFO: task hung in tty_ioctl run #5: crashed: INFO: task hung in tty_ioctl run #6: crashed: INFO: task hung in tty_ioctl run #7: crashed: INFO: task hung in tty_ioctl run #8: crashed: INFO: task hung in tty_ioctl run #9: crashed: INFO: task hung in tty_ioctl revisions tested: 2, total time: 29m44.490056349s (build: 16m43.847227112s, test: 12m36.916920445s) the crash still happens on HEAD commit msg: Linux 4.19.208 crash: INFO: task hung in tty_ioctl Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 INFO: task agetty:8021 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. agetty D27480 8021 1 0x00000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x571/0x11c0 kernel/locking/mutex.c:1078 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1093 tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 tiocsti drivers/tty/tty_io.c:2191 [inline] tty_ioctl+0x613/0x1300 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fcf4a914017 Code: Bad RIP value. RSP: 002b:00007fff2ab297e8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fff2ab29985 RCX: 00007fcf4a914017 RDX: 00007fff2ab29984 RSI: 0000000000005412 RDI: 0000000000000000 RBP: 00007fff2ab29a22 R08: ffffffffffffff98 R09: 00007fff2ab29860 R10: 0000000000000000 R11: 0000000000000202 R12: 00007fff2ab29804 R13: 00007fff2ab29960 R14: 00007fff2ab29860 R15: 0000000000000000 INFO: task syz-executor.0:10785 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28744 10785 8476 0x00000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x571/0x11c0 kernel/locking/mutex.c:1078 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1093 tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 paste_selection+0x114/0x430 drivers/tty/vt/selection.c:372 tioclinux+0xfb/0x390 drivers/tty/vt/vt.c:3055 vt_ioctl+0x1a06/0x2200 drivers/tty/vt/vt_ioctl.c:372 tty_ioctl+0x456/0x1300 drivers/tty/tty_io.c:2669 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: 61 73 75 96 80 79 04 68 75 90 b8 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 30 81 39 73 69 6e 67 75 0e 66 <81> 79 04 6c 65 66 90 0f 84 0f ff ff ff 81 39 73 79 73 74 0f 85 57 RSP: 002b:00007f7d40b1e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc55323dcf R14: 00007f7d40b1e300 R15: 0000000000022000 INFO: task syz-executor.4:10793 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28072 10793 8471 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x571/0x11c0 kernel/locking/mutex.c:1078 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1093 tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 paste_selection+0x114/0x430 drivers/tty/vt/selection.c:372 tioclinux+0xfb/0x390 drivers/tty/vt/vt.c:3055 vt_ioctl+0x1a06/0x2200 drivers/tty/vt/vt_ioctl.c:372 tty_ioctl+0x456/0x1300 drivers/tty/tty_io.c:2669 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: 61 73 75 96 80 79 04 68 75 90 b8 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 30 81 39 73 69 6e 67 75 0e 66 <81> 79 04 6c 65 66 90 0f 84 0f ff ff ff 81 39 73 79 73 74 0f 85 57 RSP: 002b:00007f3a9ad6b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd9bdb747f R14: 00007f3a9ad6b300 R15: 0000000000022000 INFO: task syz-executor.5:10794 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28456 10794 8477 0x00000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x571/0x11c0 kernel/locking/mutex.c:1078 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1093 tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 paste_selection+0x114/0x430 drivers/tty/vt/selection.c:372 tioclinux+0xfb/0x390 drivers/tty/vt/vt.c:3055 vt_ioctl+0x1a06/0x2200 drivers/tty/vt/vt_ioctl.c:372 tty_ioctl+0x456/0x1300 drivers/tty/tty_io.c:2669 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: 61 73 75 96 80 79 04 68 75 90 b8 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 30 81 39 73 69 6e 67 75 0e 66 <81> 79 04 6c 65 66 90 0f 84 0f ff ff ff 81 39 73 79 73 74 0f 85 57 RSP: 002b:00007fc44a161188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd32a5cb5f R14: 00007fc44a161300 R15: 0000000000022000 INFO: task syz-executor.1:10804 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28856 10804 8474 0x00000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x571/0x11c0 kernel/locking/mutex.c:1078 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1093 tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 paste_selection+0x114/0x430 drivers/tty/vt/selection.c:372 tioclinux+0xfb/0x390 drivers/tty/vt/vt.c:3055 vt_ioctl+0x1a06/0x2200 drivers/tty/vt/vt_ioctl.c:372 tty_ioctl+0x456/0x1300 drivers/tty/tty_io.c:2669 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: 61 73 75 96 80 79 04 68 75 90 b8 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 30 81 39 73 69 6e 67 75 0e 66 <81> 79 04 6c 65 66 90 0f 84 0f ff ff ff 81 39 73 79 73 74 0f 85 57 RSP: 002b:00007f87fd7dc188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffff744c45f R14: 00007f87fd7dc300 R15: 0000000000022000 INFO: task syz-executor.2:10806 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28856 10806 8468 0x00000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x571/0x11c0 kernel/locking/mutex.c:1078 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1093 tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 paste_selection+0x114/0x430 drivers/tty/vt/selection.c:372 tioclinux+0xfb/0x390 drivers/tty/vt/vt.c:3055 vt_ioctl+0x1a06/0x2200 drivers/tty/vt/vt_ioctl.c:372 tty_ioctl+0x456/0x1300 drivers/tty/tty_io.c:2669 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: 61 73 75 96 80 79 04 68 75 90 b8 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 30 81 39 73 69 6e 67 75 0e 66 <81> 79 04 6c 65 66 90 0f 84 0f ff ff ff 81 39 73 79 73 74 0f 85 57 RSP: 002b:00007f1f3022b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fff6441dc4f R14: 00007f1f3022b300 R15: 0000000000022000 INFO: task syz-executor.3:10814 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28760 10814 8469 0x00000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x571/0x11c0 kernel/locking/mutex.c:1078 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1093 tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 paste_selection+0x114/0x430 drivers/tty/vt/selection.c:372 tioclinux+0xfb/0x390 drivers/tty/vt/vt.c:3055 vt_ioctl+0x1a06/0x2200 drivers/tty/vt/vt_ioctl.c:372 tty_ioctl+0x456/0x1300 drivers/tty/tty_io.c:2669 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: 61 73 75 96 80 79 04 68 75 90 b8 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 30 81 39 73 69 6e 67 75 0e 66 <81> 79 04 6c 65 66 90 0f 84 0f ff ff ff 81 39 73 79 73 74 0f 85 57 RSP: 002b:00007f016f46f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fff931c623f R14: 00007f016f46f300 R15: 0000000000022000 INFO: task syz-executor.0:10820 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28856 10820 8476 0x00000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x571/0x11c0 kernel/locking/mutex.c:1078 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1093 tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 paste_selection+0x114/0x430 drivers/tty/vt/selection.c:372 tioclinux+0xfb/0x390 drivers/tty/vt/vt.c:3055 vt_ioctl+0x1a06/0x2200 drivers/tty/vt/vt_ioctl.c:372 tty_ioctl+0x456/0x1300 drivers/tty/tty_io.c:2669 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: 61 73 75 96 80 79 04 68 75 90 b8 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 30 81 39 73 69 6e 67 75 0e 66 <81> 79 04 6c 65 66 90 0f 84 0f ff ff ff 81 39 73 79 73 74 0f 85 57 RSP: 002b:00007f7d40b1e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc55323dcf R14: 00007f7d40b1e300 R15: 0000000000022000 INFO: task syz-executor.5:10828 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28856 10828 8477 0x00000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x571/0x11c0 kernel/locking/mutex.c:1078 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1093 tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 paste_selection+0x114/0x430 drivers/tty/vt/selection.c:372 tioclinux+0xfb/0x390 drivers/tty/vt/vt.c:3055 vt_ioctl+0x1a06/0x2200 drivers/tty/vt/vt_ioctl.c:372 tty_ioctl+0x456/0x1300 drivers/tty/tty_io.c:2669 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: 61 73 75 96 80 79 04 68 75 90 b8 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 30 81 39 73 69 6e 67 75 0e 66 <81> 79 04 6c 65 66 90 0f 84 0f ff ff ff 81 39 73 79 73 74 0f 85 57 RSP: 002b:00007fc44a161188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd32a5cb5f R14: 00007fc44a161300 R15: 0000000000022000 INFO: task syz-executor.4:10836 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D27528 10836 8471 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x571/0x11c0 kernel/locking/mutex.c:1078 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1093 tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 paste_selection+0x114/0x430 drivers/tty/vt/selection.c:372 tioclinux+0xfb/0x390 drivers/tty/vt/vt.c:3055 vt_ioctl+0x1a06/0x2200 drivers/tty/vt/vt_ioctl.c:372 tty_ioctl+0x456/0x1300 drivers/tty/tty_io.c:2669 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: 61 73 75 96 80 79 04 68 75 90 b8 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 30 81 39 73 69 6e 67 75 0e 66 <81> 79 04 6c 65 66 90 0f 84 0f ff ff ff 81 39 73 79 73 74 0f 85 57 RSP: 002b:00007f3a9ad6b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd9bdb747f R14: 00007f3a9ad6b300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1571: #0: 00000000ad6c65c3 (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:4443 2 locks held by agetty/8021: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/10775: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/10785: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/10793: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/10794: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/10804: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/10806: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/10814: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/10820: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/10828: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/10836: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/10844: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/10850: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/10858: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/10864: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/10872: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/10880: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/10887: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/10894: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/10902: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/10908: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/10914: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/10924: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/10932: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/10938: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/10945: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/10952: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/10959: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/10968: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/10976: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/10982: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/10990: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/10996: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11002: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11012: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11022: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11025: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11031: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11039: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11047: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11055: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11061: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11069: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11078: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11083: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11091: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11097: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11105: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11113: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11120: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11127: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11135: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11143: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11153: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11157: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11169: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11171: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11178: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11188: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11194: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11201: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11214: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11215: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11221: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11234: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11237: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11245: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11255: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11259: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11265: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11273: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11286: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11289: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11297: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11303: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11311: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11319: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11328: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11333: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11344: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11347: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11355: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11362: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11371: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11377: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11388: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11391: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11399: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11407: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11414: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11421: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11434: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11435: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11443: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11449: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11462: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11465: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11471: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11479: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11487: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11493: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11501: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11509: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11517: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11523: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11531: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11538: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11545: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11553: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11561: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11567: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11573: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11581: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11589: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11597: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11607: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11611: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11617: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11627: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11636: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11641: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11649: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11655: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11663: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11671: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11678: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11685: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11693: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11699: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11705: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11715: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11724: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11729: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11736: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11743: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11750: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11759: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11770: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11773: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11779: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11787: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11795: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11803: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11809: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11817: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11825: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11831: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11839: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11884: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.4/11847: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11853: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11861: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11869: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11875: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11881: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11893: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.2/11900: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.3/11908: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.0/11914: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.5/11922: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 2 locks held by syz-executor.1/11929: #0: 000000009d38097d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b94136b1 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x2b/0x30 drivers/tty/tty_buffer.c:61 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.208-syzkaller #0 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+0x17c/0x226 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.0+0x3c/0x78 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xf6/0x120 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x5c3/0xb40 kernel/hung_task.c:287 kthread+0x347/0x410 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.208-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:update_stack_state+0x40a/0x660 arch/x86/kernel/unwind_frame.c:218 Code: ff ff 10 00 00 00 e9 3e fd ff ff 49 8d 7d 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 1e 02 00 00 <49> 8b 45 38 48 83 c0 10 48 89 85 50 ff ff ff e9 aa fc ff ff 49 8d RSP: 0018:ffff8880ba207508 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8880ba207748 RDX: 1ffff11017440ee5 RSI: ffff8880ba207778 RDI: ffff8880ba207728 RBP: ffff8880ba2075d0 R08: 1ffff11017440ee8 R09: ffff8880ba207728 R10: ffff8880ba207668 R11: ffff8880ba20774f R12: 1ffff11017440ec1 R13: ffff8880ba2076f0 R14: 1ffff11017440ea9 R15: ffff8880ba207778 FS: 0000000000000000(0000) GS:ffff8880ba200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f67c4c4c008 CR3: 00000000a167f000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame.part.6+0x1ab/0xa60 arch/x86/kernel/unwind_frame.c:333 unwind_next_frame arch/x86/include/asm/unwind.h:46 [inline] __unwind_start+0x1ed/0x400 arch/x86/kernel/unwind_frame.c:433 unwind_start arch/x86/include/asm/unwind.h:60 [inline] __save_stack_trace+0x5c/0x100 arch/x86/kernel/stacktrace.c:43 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc.part.1+0x62/0xf0 mm/kasan/kasan.c:553 kasan_kmalloc+0xaf/0xc0 mm/kasan/kasan.c:538 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slab.c:3340 [inline] kmem_cache_alloc_node_trace+0x140/0x3e0 mm/slab.c:3666 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x3c/0x70 mm/slab.c:3703 __kmalloc_reserve.isra.9+0x2c/0xc0 net/core/skbuff.c:137 __alloc_skb+0xd7/0x580 net/core/skbuff.c:205 skb_copy+0x11b/0x2d0 net/core/skbuff.c:1358 mac80211_hwsim_tx_frame_no_nl.isra.20+0x96f/0x1170 drivers/net/wireless/mac80211_hwsim.c:1353 mac80211_hwsim_tx_frame drivers/net/wireless/mac80211_hwsim.c:1556 [inline] mac80211_hwsim_tx_frame+0x101/0x200 drivers/net/wireless/mac80211_hwsim.c:1537 mac80211_hwsim_beacon_tx+0x397/0x5f0 drivers/net/wireless/mac80211_hwsim.c:1595 __iterate_interfaces+0xd6/0x380 net/mac80211/util.c:614 ieee80211_iterate_active_interfaces_atomic+0x61/0x100 net/mac80211/util.c:650 mac80211_hwsim_beacon+0xbb/0x180 drivers/net/wireless/mac80211_hwsim.c:1615 __tasklet_hrtimer_trampoline+0x2d/0xb0 kernel/softirq.c:601 tasklet_action_common.isra.2+0x266/0x360 kernel/softirq.c:522 tasklet_hi_action+0x48/0x60 kernel/softirq.c:545 __do_softirq+0x25f/0x919 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13e/0x540 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:61 Code: 11 ff ff ff 4c 89 e7 e8 3c 3f e6 f9 eb 97 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 e9 07 00 00 00 0f 00 2d 40 57 61 00 fb f4 <5d> c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 e5 e9 07 00 00 RSP: 0018:ffffffff89807c80 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffffffff89877400 RCX: 0000000000000000 RDX: 1ffffffff13224a4 RSI: 0000000000000001 RDI: ffffffff89912520 RBP: ffffffff89807c80 R08: ffffed101744455b R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff89912510 R14: ffffffff8ab989d8 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0x51/0x310 arch/x86/kernel/process.c:557 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:548 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x451/0x570 kernel/sched/idle.c:263 cpu_startup_entry+0xc8/0xe0 kernel/sched/idle.c:369 rest_init+0x237/0x23d init/main.c:441 start_kernel+0x648/0x686 init/main.c:736 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:490 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:471 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 00 adc %al,(%rax) 2: 00 00 add %al,(%rax) 4: e9 3e fd ff ff jmpq 0xfffffd47 9: 49 8d 7d 38 lea 0x38(%r13),%rdi d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 14: fc ff df 17: 48 89 fa mov %rdi,%rdx 1a: 48 c1 ea 03 shr $0x3,%rdx 1e: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 22: 0f 85 1e 02 00 00 jne 0x246 * 28: 49 8b 45 38 mov 0x38(%r13),%rax <-- trapping instruction 2c: 48 83 c0 10 add $0x10,%rax 30: 48 89 85 50 ff ff ff mov %rax,-0xb0(%rbp) 37: e9 aa fc ff ff jmpq 0xfffffce6 3c: 49 rex.WB 3d: 8d .byte 0x8d