syzbot


INFO: task hung in ext4_fallocate

Status: fixed on 2018/11/12 21:25
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+c61979f6f2cba5cb3c06@syzkaller.appspotmail.com
Fix commit: f18b2b83a727 ext4: fix argument checking in EXT4_IOC_MOVE_EXT
First crash: 2123d, last: 2123d
Duplicate bugs (1)
duplicates (1):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
INFO: task hung in jbd2_journal_commit_transaction ext4 C 52 2110d 2129d 0/27 closed as dup on 2018/10/02 14:53
Discussions (13)
Title Replies (including bot) Last reply
[PATCH 4.19 000/361] 4.19.2-stable review 384 (384) 2018/12/17 17:52
[PATCH 3.18 00/90] 3.18.126-stable review 102 (102) 2018/11/22 06:30
[PATCH 4.4 000/160] 4.4.164-stable review 169 (169) 2018/11/21 07:59
[PATCH 4.14 000/222] 4.14.81-stable review 231 (231) 2018/11/13 19:11
[PATCH 4.9 000/141] 4.9.137-stable review 148 (148) 2018/11/13 19:11
[PATCH 4.18 000/350] 4.18.19-stable review 354 (354) 2018/11/13 00:57
[PATCH AUTOSEL 4.4 01/32] locking/lockdep: Fix debug_locks off performance problem 34 (34) 2018/11/12 13:32
[PATCH AUTOSEL 4.9 01/48] net: ethernet: ti: cpsw: unsync mcast entries while switch promisc mode 49 (49) 2018/11/12 10:31
[PATCH AUTOSEL 4.19 001/146] net: socionext: Reset tx queue in ndo_stop 151 (151) 2018/11/06 15:50
[PATCH AUTOSEL 4.14 01/73] net: ethernet: ti: cpsw: unsync mcast entries while switch promisc mode 75 (75) 2018/11/01 15:48
[PATCH AUTOSEL 3.18 01/22] locking/lockdep: Fix debug_locks off performance problem 24 (24) 2018/11/01 01:29
[PATCH AUTOSEL 4.18 001/126] net: socionext: Reset tx queue in ndo_stop 126 (126) 2018/10/31 23:07
INFO: task hung in ext4_fallocate 1 (2) 2018/10/02 05:35
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in ext4_fallocate (2) ext4 1 622d 622d 0/27 auto-obsoleted due to no activity on 2023/02/10 19:26
android-49 INFO: task hung in ext4_fallocate 1 2028d 1927d 0/3 auto-closed as invalid on 2019/07/02 10:28
upstream INFO: task hung in ext4_fallocate (3) ext4 1 468d 468d 0/27 auto-obsoleted due to no activity on 2023/07/11 11:25

Sample crash report:
audit: type=1400 audit(1538313446.938:37): avc:  denied  { map } for  pid=5541 comm="syz-executor212" path="/root/syz-executor212822736" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
INFO: task syz-executor212:5548 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc5+ #40
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor212 D19712  5548   5545 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2825 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
 schedule+0xfe/0x460 kernel/sched/core.c:3517
 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xa5/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:738 [inline]
 ext4_fallocate+0x921/0x2300 fs/ext4/extents.c:4957
 vfs_fallocate+0x4b4/0x940 fs/open.c:308
 ksys_fallocate+0x56/0x90 fs/open.c:331
 __do_sys_fallocate fs/open.c:339 [inline]
 __se_sys_fallocate fs/open.c:337 [inline]
 __x64_sys_fallocate+0x97/0xf0 fs/open.c:337
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e 4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c 20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65
RSP: 002b:00007ffd82484778 EFLAGS: 00000217 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000010001 R11: 0000000000000217 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor212:5550 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc5+ #40
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor212 D23736  5550   5543 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2825 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
 schedule+0xfe/0x460 kernel/sched/core.c:3517
 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xa5/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:738 [inline]
 process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
 ima_file_check+0xe5/0x130 security/integrity/ima/ima_main.c:391
 do_last fs/namei.c:3422 [inline]
 path_openat+0x134d/0x5160 fs/namei.c:3534
 do_filp_open+0x255/0x380 fs/namei.c:3564
 do_sys_open+0x568/0x700 fs/open.c:1063
 __do_sys_openat fs/open.c:1090 [inline]
 __se_sys_openat fs/open.c:1084 [inline]
 __x64_sys_openat+0x9d/0x100 fs/open.c:1084
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e 4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c 20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65
RSP: 002b:00007ffd82484778 EFLAGS: 00000207 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 00000000008c3880 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor212:5551 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc5+ #40
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor212 D23736  5551   5546 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2825 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
 schedule+0xfe/0x460 kernel/sched/core.c:3517
 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xa5/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:738 [inline]
 process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
 ima_file_check+0xe5/0x130 security/integrity/ima/ima_main.c:391
 do_last fs/namei.c:3422 [inline]
 path_openat+0x134d/0x5160 fs/namei.c:3534
 do_filp_open+0x255/0x380 fs/namei.c:3564
 do_sys_open+0x568/0x700 fs/open.c:1063
 __do_sys_openat fs/open.c:1090 [inline]
 __se_sys_openat fs/open.c:1084 [inline]
 __x64_sys_openat+0x9d/0x100 fs/open.c:1084
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e 4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c 20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65
RSP: 002b:00007ffd82484778 EFLAGS: 00000207 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 00000000008c3880 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor212:5552 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc5+ #40
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor212 D23888  5552   5544 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2825 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
 schedule+0xfe/0x460 kernel/sched/core.c:3517
 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xa5/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:738 [inline]
 process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
 ima_file_check+0xe5/0x130 security/integrity/ima/ima_main.c:391
 do_last fs/namei.c:3422 [inline]
 path_openat+0x134d/0x5160 fs/namei.c:3534
 do_filp_open+0x255/0x380 fs/namei.c:3564
 do_sys_open+0x568/0x700 fs/open.c:1063
 __do_sys_openat fs/open.c:1090 [inline]
 __se_sys_openat fs/open.c:1084 [inline]
 __x64_sys_openat+0x9d/0x100 fs/open.c:1084
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e 4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c 20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65
RSP: 002b:00007ffd82484778 EFLAGS: 00000207 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 00000000008c3880 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor212:5553 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc5+ #40
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor212 D23736  5553   5542 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2825 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
 schedule+0xfe/0x460 kernel/sched/core.c:3517
 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xa5/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:738 [inline]
 process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
 ima_file_check+0xe5/0x130 security/integrity/ima/ima_main.c:391
 do_last fs/namei.c:3422 [inline]
 path_openat+0x134d/0x5160 fs/namei.c:3534
 do_filp_open+0x255/0x380 fs/namei.c:3564
 do_sys_open+0x568/0x700 fs/open.c:1063
 __do_sys_openat fs/open.c:1090 [inline]
 __se_sys_openat fs/open.c:1084 [inline]
 __x64_sys_openat+0x9d/0x100 fs/open.c:1084
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e 4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c 20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65
RSP: 002b:00007ffd82484778 EFLAGS: 00000207 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 00000000008c3880 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000

Showing all locks held in the system:
1 lock held by khungtaskd/983:
 #0: 000000005e364832 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4435
1 lock held by rsyslogd/5383:
 #0: 000000003ee63875 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766
2 locks held by getty/5505:
 #0: 0000000016366007 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 000000001962389b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5506:
 #0: 00000000459f06bd (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 000000009ba0e33f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5507:
 #0: 00000000ed059e98 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 000000006a8dd22c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5508:
 #0: 00000000de392f74 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 000000002f41f35e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5509:
 #0: 000000004b0015bd (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000fbcabc1c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5510:
 #0: 000000000749babf (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 0000000039eaad48 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5511:
 #0: 000000009592ef13 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 0000000080736cf9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by syz-executor212/5548:
 #0: 00000000dd953693 (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2759 [inline]
 #0: 00000000dd953693 (sb_writers#4){.+.+}, at: vfs_fallocate+0x72a/0x940 fs/open.c:307
 #1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: inode_lock include/linux/fs.h:738 [inline]
 #1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: ext4_fallocate+0x921/0x2300 fs/ext4/extents.c:4957
6 locks held by syz-executor212/5549:
2 locks held by syz-executor212/5550:
 #0: 00000000dd953693 (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline]
 #0: 00000000dd953693 (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360
 #1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: inode_lock include/linux/fs.h:738 [inline]
 #1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
2 locks held by syz-executor212/5551:
 #0: 00000000dd953693 (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline]
 #0: 00000000dd953693 (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360
 #1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: inode_lock include/linux/fs.h:738 [inline]
 #1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
2 locks held by syz-executor212/5552:
 #0: 00000000dd953693 (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline]
 #0: 00000000dd953693 (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360
 #1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: inode_lock include/linux/fs.h:738 [inline]
 #1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
2 locks held by syz-executor212/5553:
 #0: 00000000dd953693 (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline]
 #0: 00000000dd953693 (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360
 #1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: inode_lock include/linux/fs.h:738 [inline]
 #1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205

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

NMI backtrace for cpu 0
CPU: 0 PID: 983 Comm: khungtaskd Not tainted 4.19.0-rc5+ #40
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+0x1c4/0x2b4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed 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:144 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline]
 watchdog+0xb3e/0x1050 kernel/hung_task.c:265
 kthread+0x35a/0x420 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5549 Comm: syz-executor212 Not tainted 4.19.0-rc5+ #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mext_check_coverage.constprop.13+0x20d/0x510 fs/ext4/move_extent.c:101
Code: 86 16 fe ff ff 4c 8d 24 40 48 b8 00 00 00 00 00 fc ff df 49 c1 e4 04 49 01 dc 49 8d 7c 24 10 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 36 02 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 64 24 10 49
RSP: 0018:ffff8801b4af71c0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff8801bac71600 RCX: ffffffff821e4a52
RDX: 1ffff1003758e2c2 RSI: ffffffff821e493b RDI: ffff8801bac71610
RBP: ffff8801b4af7270 R08: ffff8801c3056180 R09: 1ffffffff1273955
R10: ffffed003b5e4732 R11: ffff8801daf23993 R12: ffff8801bac71600
R13: 00000000cbb0eca5 R14: ffff8801b0f34530 R15: ffff8801b4af73e0
FS:  00000000008c3880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000001c59e4000 CR4: 00000000001406e0
Call Trace:
 move_extent_per_page fs/ext4/move_extent.c:323 [inline]
 ext4_move_extents+0x2784/0x3c20 fs/ext4/move_extent.c:669
 ext4_ioctl+0x3154/0x4210 fs/ext4/ioctl.c:799
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl fs/ioctl.c:707 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
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 0b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd82484778 EFLAGS: 00000217 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 0000000020000040 RSI: 00000000c028660f RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000004002c8 R11: 0000000000000217 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/09/30 13:22 upstream 291d0e5d81e1 41e4b329 .config console log report syz C ci-upstream-kasan-gce-selinux-root
* Struck through repros no longer work on HEAD.