INFO: task syz-executor can't die for more than 143 seconds.

INFO: task syz-executor can't die for more than 143 seconds.
Status: fixed on 2019/10/15 23:40
Reported-by: syzbot+8ab2d0f39fb79fe6ca40@syzkaller.appspotmail.com
Fix commit: 8619e5bd /dev/mem: Bail out upon SIGKILL. 7c3a6aed kexec: bail out upon SIGKILL when allocating memory. 8f9e86ee staging: android: ion: Bail out upon SIGKILL when allocating memory.
First crash: 538d, last: 422d

Cause bisection: introduced by (bisect log) :
commit 4ddc1b28aac57a90c6426d55e0dea3c1b5eb4782
Author: Chao Yu <yuchao0@huawei.com>
Date: Wed Jul 25 23:19:48 2018 +0000

f2fs: fix to restrict mount condition when without CONFIG_QUOTA

Crash: no output from test machine (log)
Repro: C syz .config

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task syz-executor can't die for more than 143 seconds. (2)	C	done		2512	130d	397d	17/17	fixed on 2020/07/17 17:58
upstream	INFO: task syz-executor can't die for more than 143 seconds. (3)				2	126d	123d	0/17	auto-closed as invalid on 2020/09/18 10:04

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2019/08/22 10:21	18m	penguin-kernel@i-love.sakura.ne.jp	patch	git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git a34a6117538e0030fa8d3af8f23e591ec189a8fc	OK

Sample crash report:

INFO: task syz-executor948:8525 can't die for more than 143 seconds.
syz-executor948 R  running task    27424  8525   8523 0x00004006
Call Trace:
 context_switch kernel/sched/core.c:3268 [inline]
 __schedule+0x776/0x17d0 kernel/sched/core.c:3937
INFO: task syz-executor948:8530 can't die for more than 144 seconds.
syz-executor948 R  running task    28168  8530   8529 0x00004006
Call Trace:
 context_switch kernel/sched/core.c:3265 [inline]
 __schedule+0x76e/0x17d0 kernel/sched/core.c:3937
 preempt_schedule_irq+0xb5/0x160 kernel/sched/core.c:4185
 retint_kernel+0x1b/0x2b
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:205
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4
RSP: 0018:ffff88808ddbfb10 EFLAGS: 00010206 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000000cf6
RDX: 0000000000001000 RSI: 000000002060ac38 RDI: ffffc900067979b7
RBP: ffff88808ddbfb48 R08: fffff52000cf3000 R09: 0000000000000000
R10: fffff52000cf47ff R11: ffffc900067a3fff R12: 000000002060b281
R13: 000000002060c281 R14: ffffc900067a3000 R15: 00007ffffffff000
 copy_from_user include/linux/uaccess.h:144 [inline]
 write_mem+0x137/0x210 drivers/char/mem.c:249
 do_loop_readv_writev.part.0+0x2ac/0x460 fs/read_write.c:720
 do_loop_readv_writev fs/read_write.c:706 [inline]
 do_iter_write fs/read_write.c:978 [inline]
 do_iter_write+0x2fa/0x380 fs/read_write.c:957
 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1021
 do_pwritev+0x1c4/0x280 fs/read_write.c:1118
 __do_sys_pwritev fs/read_write.c:1165 [inline]
 __se_sys_pwritev fs/read_write.c:1160 [inline]
 __x64_sys_pwritev+0x9a/0xf0 fs/read_write.c:1160
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441329
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc00d93af8 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441329
RDX: 0000000000000002 RSI: 0000000020000740 RDI: 0000000000000003
RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000febfffff R11: 0000000000000246 R12: 00000000004020a0
R13: 0000000000402130 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor948:8531 can't die for more than 145 seconds.
syz-executor948 R  running task    28168  8531   8526 0x00004006
Call Trace:
 context_switch kernel/sched/core.c:3265 [inline]
 __schedule+0x76e/0x17d0 kernel/sched/core.c:3937
 preempt_schedule_irq+0xb5/0x160 kernel/sched/core.c:4185
 retint_kernel+0x1b/0x2b
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:205
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4
RSP: 0018:ffff888090bcfb10 EFLAGS: 00010206 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000000009
RDX: 0000000000001000 RSI: 0000000020609735 RDI: ffffc900068114b4
RBP: ffff888090bcfb48 R08: fffff52000d02400 R09: 0000000000000000
R10: fffff52000d023ff R11: ffffc90006811fff R12: 0000000020609281
R13: 000000002060a281 R14: ffffc90006811000 R15: 00007ffffffff000
 copy_from_user include/linux/uaccess.h:144 [inline]
 write_mem+0x137/0x210 drivers/char/mem.c:249
 do_loop_readv_writev.part.0+0x2ac/0x460 fs/read_write.c:720
 do_loop_readv_writev fs/read_write.c:706 [inline]
 do_iter_write fs/read_write.c:978 [inline]
 do_iter_write+0x2fa/0x380 fs/read_write.c:957
 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1021
 do_pwritev+0x1c4/0x280 fs/read_write.c:1118
 __do_sys_pwritev fs/read_write.c:1165 [inline]
 __se_sys_pwritev fs/read_write.c:1160 [inline]
 __x64_sys_pwritev+0x9a/0xf0 fs/read_write.c:1160
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441329
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc00d93af8 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441329
RDX: 0000000000000002 RSI: 0000000020000740 RDI: 0000000000000003
RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000febfffff R11: 0000000000000246 R12: 00000000004020a0
R13: 0000000000402130 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor948:8532 can't die for more than 146 seconds.
syz-executor948 R  running task    28168  8532   8524 0x00004006
Call Trace:
 context_switch kernel/sched/core.c:3268 [inline]
 __schedule+0x776/0x17d0 kernel/sched/core.c:3937
 preempt_schedule_irq+0xb5/0x160 kernel/sched/core.c:4185
 retint_kernel+0x1b/0x2b
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:205
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4
RSP: 0018:ffff88809134fb10 EFLAGS: 00010206 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 00000000000007d0
RDX: 0000000000001000 RSI: 000000002061d437 RDI: ffffc900068871b6
RBP: ffff88809134fb48 R08: fffff52000d11000 R09: 0000000000000000
R10: fffff52000d10fff R11: ffffc90006887fff R12: 000000002061d281
R13: 000000002061e281 R14: ffffc90006887000 R15: 00007ffffffff000
 copy_from_user include/linux/uaccess.h:144 [inline]
 write_mem+0x137/0x210 drivers/char/mem.c:249
 do_loop_readv_writev.part.0+0x2ac/0x460 fs/read_write.c:720
 do_loop_readv_writev fs/read_write.c:706 [inline]
 do_iter_write fs/read_write.c:978 [inline]
 do_iter_write+0x2fa/0x380 fs/read_write.c:957
 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1021
 do_pwritev+0x1c4/0x280 fs/read_write.c:1118
 __do_sys_pwritev fs/read_write.c:1165 [inline]
 __se_sys_pwritev fs/read_write.c:1160 [inline]
 __x64_sys_pwritev+0x9a/0xf0 fs/read_write.c:1160
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441329
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc00d93af8 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441329
RDX: 0000000000000002 RSI: 0000000020000740 RDI: 0000000000000003
RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000febfffff R11: 0000000000000246 R12: 00000000004020a0
R13: 0000000000402130 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor948:8533 can't die for more than 147 seconds.
syz-executor948 R  running task    28168  8533   8527 0x00004006
Call Trace:
 context_switch kernel/sched/core.c:3265 [inline]
 __schedule+0x76e/0x17d0 kernel/sched/core.c:3937
 preempt_schedule_irq+0xb5/0x160 kernel/sched/core.c:4185
 retint_kernel+0x1b/0x2b
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:205
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4
RSP: 0018:ffff88808dc87b10 EFLAGS: 00010206 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000000a14
RDX: 0000000000001000 RSI: 0000000020628255 RDI: ffffc900068ebfd4
RBP: ffff88808dc87b48 R08: fffff52000d1d800 R09: 0000000000000000
R10: fffff52000d1f7ff R11: ffffc900068fbfff R12: 0000000020628281
R13: 0000000020629281 R14: ffffc900068fb000 R15: 00007ffffffff000
 copy_from_user include/linux/uaccess.h:144 [inline]
 write_mem+0x137/0x210 drivers/char/mem.c:249
 do_loop_readv_writev.part.0+0x2ac/0x460 fs/read_write.c:720
 do_loop_readv_writev fs/read_write.c:706 [inline]
 do_iter_write fs/read_write.c:978 [inline]
 do_iter_write+0x2fa/0x380 fs/read_write.c:957
 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1021
 do_pwritev+0x1c4/0x280 fs/read_write.c:1118
 __do_sys_pwritev fs/read_write.c:1165 [inline]
 __se_sys_pwritev fs/read_write.c:1160 [inline]
 __x64_sys_pwritev+0x9a/0xf0 fs/read_write.c:1160
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441329
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc00d93af8 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441329
RDX: 0000000000000002 RSI: 0000000020000740 RDI: 0000000000000003
RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000febfffff R11: 0000000000000246 R12: 00000000004020a0
R13: 0000000000402130 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor948:8534 can't die for more than 148 seconds.
syz-executor948 R  running task    28168  8534   8528 0x00004006
Call Trace:
 context_switch kernel/sched/core.c:3265 [inline]
 __schedule+0x76e/0x17d0 kernel/sched/core.c:3937
 preempt_schedule_irq+0xb5/0x160 kernel/sched/core.c:4185
 retint_kernel+0x1b/0x2b
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:205
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4
RSP: 0018:ffff88808e357b10 EFLAGS: 00010206 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000000b58
RDX: 0000000000001000 RSI: 0000000020628c53 RDI: ffffc9000696d9d2
RBP: ffff88808e357b48 R08: fffff52000d2dc00 R09: 0000000000000000
R10: fffff52000d2ebff R11: ffffc90006975fff R12: 0000000020629281
R13: 000000002062a281 R14: ffffc90006975000 R15: 00007ffffffff000
 copy_from_user include/linux/uaccess.h:144 [inline]
 write_mem+0x137/0x210 drivers/char/mem.c:249
 do_loop_readv_writev.part.0+0x2ac/0x460 fs/read_write.c:720
 do_loop_readv_writev fs/read_write.c:706 [inline]
 do_iter_write fs/read_write.c:978 [inline]
 do_iter_write+0x2fa/0x380 fs/read_write.c:957
 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1021
 do_pwritev+0x1c4/0x280 fs/read_write.c:1118
 __do_sys_pwritev fs/read_write.c:1165 [inline]
 __se_sys_pwritev fs/read_write.c:1160 [inline]
 __x64_sys_pwritev+0x9a/0xf0 fs/read_write.c:1160
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441329
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc00d93af8 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441329
RDX: 0000000000000002 RSI: 0000000020000740 RDI: 0000000000000003
RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000febfffff R11: 0000000000000246 R12: 00000000004020a0
R13: 0000000000402130 R14: 0000000000000000 R15: 0000000000000000

Showing all locks held in the system:
1 lock held by khungtaskd/1063:
 #0: ffffffff88fa9ac0 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5337
1 lock held by rsyslogd/8408:
 #0: ffff8880a1dc98e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
2 locks held by getty/8498:
 #0: ffff888091b4e390 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f392e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/8499:
 #0: ffff8880876b8410 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f352e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/8500:
 #0: ffff888087ac2e10 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f532e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/8501:
 #0: ffff888087ac3690 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f4f2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/8502:
 #0: ffff888096e91650 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f4b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/8503:
 #0: ffff88808f734490 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f432e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/8504:
 #0: ffff8880942a4310 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f212e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1063 Comm: khungtaskd Not tainted 5.3.0-rc5-next-20190821 #70
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+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b 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:269 [inline]
 watchdog+0xc99/0x1360 kernel/hung_task.c:353
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8530 Comm: syz-executor948 Not tainted 5.3.0-rc5-next-20190821 #70
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:205
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4
RSP: 0018:ffff88808ddbfb10 EFLAGS: 00010206
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000000a1e
RDX: 0000000000001000 RSI: 0000000020642863 RDI: ffffc90006a1f5e2
RBP: ffff88808ddbfb48 R08: fffff52000d44000 R09: 0000000000000000
R10: fffff52000d43fff R11: ffffc90006a1ffff R12: 0000000020642281
R13: 0000000020643281 R14: ffffc90006a1f000 R15: 00007ffffffff000
FS:  00005555566ee880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000221b000 CR3: 0000000094aa8000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 copy_from_user include/linux/uaccess.h:144 [inline]
 write_mem+0x137/0x210 drivers/char/mem.c:249
 do_loop_readv_writev.part.0+0x2ac/0x460 fs/read_write.c:720
 do_loop_readv_writev fs/read_write.c:706 [inline]
 do_iter_write fs/read_write.c:978 [inline]
 do_iter_write+0x2fa/0x380 fs/read_write.c:957
 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1021
 do_pwritev+0x1c4/0x280 fs/read_write.c:1118
 __do_sys_pwritev fs/read_write.c:1165 [inline]
 __se_sys_pwritev fs/read_write.c:1160 [inline]
 __x64_sys_pwritev+0x9a/0xf0 fs/read_write.c:1160
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441329
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc00d93af8 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441329
RDX: 0000000000000002 RSI: 0000000020000740 RDI: 0000000000000003
RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000febfffff R11: 0000000000000246 R12: 00000000004020a0
R13: 0000000000402130 R14: 0000000000000000 R15: 0000000000000000

Crashes (61):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-linux-next-kasan-gce-root	2019/08/22 04:44	linux-next	a34a6117	984250d5	.config	log	report	syz	C	arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/06/12 20:52	linux-next	81a72c79	794a1ad7	.config	log	report	syz	C	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/09/28 18:56	linux-next	bb2aee77	eb6b9855	.config	log	report			ast@kernel.org, bpf@vger.kernel.org, christian@brauner.io, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, edumazet@google.com, hawk@kernel.org, idosch@mellanox.com, jakub.kicinski@netronome.com, jiri@mellanox.com, johannes.berg@intel.com, john.fastabend@gmail.com, kafai@fb.com, linux-kernel@vger.kernel.org, mkubecek@suse.cz, netdev@vger.kernel.org, nikolay@cumulusnetworks.com, petrm@mellanox.com, roopa@cumulusnetworks.com, songliubraving@fb.com, yhs@fb.com
ci-upstream-linux-next-kasan-gce-root	2019/09/17 15:02	linux-next	f84e1c16	13dcda9b	.config	log	report			bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, x86@kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/09/15 22:13	linux-next	6d028043	32d59357	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/09/12 01:34	linux-next	6d028043	f4e53c10	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/09/11 08:52	linux-next	6d028043	a60cb4cd	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/09/04 00:02	linux-next	6d028043	526709ff	.config	log	report			arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/09/01 03:31	linux-next	6d028043	bad3cce2	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/28 07:56	linux-next	ed2393ca	fd37b39e	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/26 12:57	linux-next	9733a7c6	d21c5d9d	.config	log	report			arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/08/25 07:56	linux-next	9733a7c6	d21c5d9d	.config	log	report			gregkh@linuxfoundation.org, jslaby@suse.com, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/08/23 04:24	linux-next	b5835edc	ca6f3cfa	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/20 16:15	linux-next	54c851a8	cfc9868f	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/15 12:25	linux-next	17da61ae	0d298d6b	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/08/12 05:13	linux-next	87b983f5	acb51638	.config	log	report			arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/08/09 18:23	linux-next	87b983f5	ede31a9b	.config	log	report			arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/08/09 03:47	linux-next	2ae25631	ede31a9b	.config	log	report			arnd@arndb.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/07/28 13:00	linux-next	fde50b96	c85e1c5b	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/26 17:32	linux-next	fde50b96	3e5d1beb	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/26 01:39	linux-next	13bf6d6a	732bc5a0	.config	log	report			bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/07/25 09:21	linux-next	13bf6d6a	32329ceb	.config	log	report			gregkh@linuxfoundation.org, jslaby@suse.com, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/07/25 02:30	linux-next	9e6dfe80	32329ceb	.config	log	report			cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, lizefan@huawei.com, tj@kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/07/24 21:43	linux-next	9e6dfe80	32329ceb	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/07/23 15:04	linux-next	6d21a41b	de453f34	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/07/23 03:04	linux-next	6d21a41b	55e0c077	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/22 19:45	linux-next	6d21a41b	b3c615f5	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/21 21:21	linux-next	6d21a41b	1656845f	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/21 10:30	linux-next	6d21a41b	1656845f	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/20 18:43	linux-next	6d21a41b	1656845f	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/07/18 12:47	linux-next	6d21a41b	7bb222f7	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/06/30 06:35	linux-next	48568d8c	7509bf36	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/30 05:21	linux-next	48568d8c	7509bf36	.config	log	report			adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-linux-next-kasan-gce-root	2019/06/27 22:58	linux-next	8087b004	7509bf36	.config	log	report			axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/06/27 16:10	linux-next	8087b004	7509bf36	.config	log	report			gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, rafael@kernel.org
ci-upstream-linux-next-kasan-gce-root	2019/06/26 12:16	linux-next	90203176	4d342240	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/26 05:51	linux-next	90203176	0a8d1a96	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/25 11:39	linux-next	9ffadb46	82c13b6b	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/25 08:00	linux-next	9ffadb46	82c13b6b	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/24 19:54	linux-next	e2d28c40	472f0082	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/24 17:06	linux-next	e2d28c40	472f0082	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/22 04:18	linux-next	dc636f5d	34bf9440	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/21 12:43	linux-next	dc636f5d	34bf9440	.config	log	report			aarcange@redhat.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, osalvador@suse.de, pasha.tatashin@oracle.com, rientjes@google.com, vbabka@suse.cz, yang.shi@linux.alibaba.com, zhongjiang@huawei.com
ci-upstream-linux-next-kasan-gce-root	2019/06/20 11:42	linux-next	c0e4c41a	34bf9440	.config	log	report			jmorris@namei.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, penguin-kernel@I-love.SAKURA.ne.jp, serge@hallyn.com, takedakn@nttdata.co.jp
ci-upstream-linux-next-kasan-gce-root	2019/06/20 08:49	linux-next	c0e4c41a	34bf9440	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/20 03:11	linux-next	c0e4c41a	34bf9440	.config	log	report			asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-linux-next-kasan-gce-root	2019/06/16 05:41	linux-next	f4788d37	442206d7	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/15 15:24	linux-next	f4788d37	442206d7	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/15 00:49	linux-next	f4788d37	442206d7	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/12 17:28	linux-next	81a72c79	794a1ad7	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/11 18:09	linux-next	f08776ca	5b5826d0	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/10 11:31	linux-next	3f310e51	0159583c	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/10 10:33	linux-next	3f310e51	0159583c	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/10 04:05	linux-next	3f310e51	0159583c	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/09 23:28	linux-next	3f310e51	0159583c	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/09 21:43	linux-next	3f310e51	0159583c	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/08 11:08	linux-next	3f310e51	cf9c3a50	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/05 19:46	linux-next	b2924447	bfb4a51e	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/05 02:07	linux-next	56b697c6	bfb4a51e	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/04 21:43	linux-next	56b697c6	e41a20c5	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root	2019/06/04 07:31	linux-next	56b697c6	ce07a7ae	.config	log	report			linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk