general protection fault in kobject_uevent
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syzbot
Jan 29, 2020, 7:40:12 PM1/29/20
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 9fa690a2 Linux 4.14.169
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=123d4776e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=eb55b601e76e3476
dashboard link: https://syzkaller.appspot.com/bug?extid=0e410209872c4f0eea2a
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0e4102...@syzkaller.appspotmail.com
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 17646 Comm: blkid Not tainted 4.14.169-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888062e42600 task.stack: ffff888089df8000
RIP: 0010:kobject_uevent_env+0xa4/0xc80 lib/kobject_uevent.c:355
RSP: 0018:ffff888089dffb60 EFLAGS: 00010206
RAX: 0000000000000018 RBX: ffff888094ad4480 RCX: 1ffff1100c5c85ce
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000000000c0
RBP: ffff888089dffbe0 R08: ffff888062e42600 R09: 0000000000000003
R10: 0000000000000000 R11: ffff888062e42600 R12: dffffc0000000000
R13: 00000000000000a0 R14: 00000000000000a0 R15: ffff888094ad45c8
FS: 00007f9ea4de1740(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fd24000 CR3: 0000000090f69000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kobject_uevent+0x20/0x30 lib/kobject_uevent.c:553
loop_clr_fd+0x4a7/0xae0 drivers/block/loop.c:1069
__lo_release drivers/block/loop.c:1660 [inline]
lo_release+0x112/0x1b0 drivers/block/loop.c:1678
__blkdev_put+0x434/0x7f0 fs/block_dev.c:1791
blkdev_put+0x88/0x510 fs/block_dev.c:1856
blkdev_close+0x8b/0xb0 fs/block_dev.c:1863
__fput+0x275/0x7a0 fs/file_table.c:210
____fput+0x16/0x20 fs/file_table.c:244
task_work_run+0x114/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f9ea46e92b0
RSP: 002b:00007ffcc73c3d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f9ea46e92b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000028 R09: 0000000001680000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000023dc030
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005
Code: c1 e8 03 42 80 3c 20 00 0f 85 6c 0a 00 00 4d 8b 76 18 4d 85 f6 0f 84 27 02 00 00 e8 f7 f1 f9 fa 49 8d 7e 20 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 3a 0a 00 00 4d 8b 7e 20 4d 85 ff 74 b4 e8
RIP: kobject_uevent_env+0xa4/0xc80 lib/kobject_uevent.c:355 RSP: ffff888089dffb60
---[ end trace 6f7b45d6d8ed5b36 ]---
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: 9fa690a2 Linux 4.14.169
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=123d4776e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=eb55b601e76e3476
dashboard link: https://syzkaller.appspot.com/bug?extid=0e410209872c4f0eea2a
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0e4102...@syzkaller.appspotmail.com
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 17646 Comm: blkid Not tainted 4.14.169-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888062e42600 task.stack: ffff888089df8000
RIP: 0010:kobject_uevent_env+0xa4/0xc80 lib/kobject_uevent.c:355
RSP: 0018:ffff888089dffb60 EFLAGS: 00010206
RAX: 0000000000000018 RBX: ffff888094ad4480 RCX: 1ffff1100c5c85ce
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000000000c0
RBP: ffff888089dffbe0 R08: ffff888062e42600 R09: 0000000000000003
R10: 0000000000000000 R11: ffff888062e42600 R12: dffffc0000000000
R13: 00000000000000a0 R14: 00000000000000a0 R15: ffff888094ad45c8
FS: 00007f9ea4de1740(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fd24000 CR3: 0000000090f69000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kobject_uevent+0x20/0x30 lib/kobject_uevent.c:553
loop_clr_fd+0x4a7/0xae0 drivers/block/loop.c:1069
__lo_release drivers/block/loop.c:1660 [inline]
lo_release+0x112/0x1b0 drivers/block/loop.c:1678
__blkdev_put+0x434/0x7f0 fs/block_dev.c:1791
blkdev_put+0x88/0x510 fs/block_dev.c:1856
blkdev_close+0x8b/0xb0 fs/block_dev.c:1863
__fput+0x275/0x7a0 fs/file_table.c:210
____fput+0x16/0x20 fs/file_table.c:244
task_work_run+0x114/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f9ea46e92b0
RSP: 002b:00007ffcc73c3d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f9ea46e92b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000028 R09: 0000000001680000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000023dc030
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005
Code: c1 e8 03 42 80 3c 20 00 0f 85 6c 0a 00 00 4d 8b 76 18 4d 85 f6 0f 84 27 02 00 00 e8 f7 f1 f9 fa 49 8d 7e 20 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 3a 0a 00 00 4d 8b 7e 20 4d 85 ff 74 b4 e8
RIP: kobject_uevent_env+0xa4/0xc80 lib/kobject_uevent.c:355 RSP: ffff888089dffb60
---[ end trace 6f7b45d6d8ed5b36 ]---
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Feb 6, 2020, 12:49:10 PM2/6/20
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following crash on:
HEAD commit: e0f8b8a6 Linux 4.14.170
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16a73cb5e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=633dd9db249084f5
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0e4102...@syzkaller.appspotmail.com
NOHZ: local_softirq_pending 08
FAT-fs (loop0): bogus number of reserved sectors
FAT-fs (loop0): Can't find a valid FAT filesystem
RAX: 0000000000000018 RBX: ffff88808d6956c0 RCX: 1ffff1101372a15e
R10: 0000000000000000 R11: ffff88809b950280 R12: dffffc0000000000
R13: 00000000000000a0 R14: 00000000000000a0 R15: ffff88808d695808
FS: 00000000029a2940(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x95f/0x1850 block/ioctl.c:594
block_ioctl+0xde/0x120 fs/block_dev.c:1881
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b207
RSP: 002b:00007fffe966c368 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045b207
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 000000000000009d R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffe966c3a0 R14: 000000000001c327 R15: 00007fffe966c3b0
Code: c1 e8 03 42 80 3c 20 00 0f 85 6c 0a 00 00 4d 8b 76 18 4d 85 f6 0f 84 27 02 00 00 e8 37 e9 f9 fa 49 8d 7e 20 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 3a 0a 00 00 4d 8b 7e 20 4d 85 ff 74 b4 e8
RIP: kobject_uevent_env+0xa4/0xc80 lib/kobject_uevent.c:355 RSP: ffff8880a4a07ae8
---[ end trace b8eb63f8627e4887 ]---
HEAD commit: e0f8b8a6 Linux 4.14.170
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16a73cb5e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=633dd9db249084f5
dashboard link: https://syzkaller.appspot.com/bug?extid=0e410209872c4f0eea2a
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11f7e031e00000
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0e4102...@syzkaller.appspotmail.com
FAT-fs (loop0): bogus number of reserved sectors
FAT-fs (loop0): Can't find a valid FAT filesystem
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 7387 Comm: syz-executor.0 Not tainted 4.14.170-syzkaller #0
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809b950280 task.stack: ffff8880a4a00000
RIP: 0010:kobject_uevent_env+0xa4/0xc80 lib/kobject_uevent.c:355
RSP: 0018:ffff8880a4a07ae8 EFLAGS: 00010206
RAX: 0000000000000018 RBX: ffff88808d6956c0 RCX: 1ffff1101372a15e
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000000000c0
RBP: ffff8880a4a07b68 R08: ffff88809b950280 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88809b950280 R12: dffffc0000000000
R13: 00000000000000a0 R14: 00000000000000a0 R15: ffff88808d695808
FS: 00000000029a2940(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 00000000a057b000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kobject_uevent+0x20/0x30 lib/kobject_uevent.c:553
loop_clr_fd+0x4a7/0xae0 drivers/block/loop.c:1069
lo_ioctl+0x8d6/0x1cd0 drivers/block/loop.c:1424
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kobject_uevent+0x20/0x30 lib/kobject_uevent.c:553
loop_clr_fd+0x4a7/0xae0 drivers/block/loop.c:1069
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x95f/0x1850 block/ioctl.c:594
block_ioctl+0xde/0x120 fs/block_dev.c:1881
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b207
RSP: 002b:00007fffe966c368 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045b207
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 000000000000009d R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffe966c3a0 R14: 000000000001c327 R15: 00007fffe966c3b0
Code: c1 e8 03 42 80 3c 20 00 0f 85 6c 0a 00 00 4d 8b 76 18 4d 85 f6 0f 84 27 02 00 00 e8 37 e9 f9 fa 49 8d 7e 20 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 3a 0a 00 00 4d 8b 7e 20 4d 85 ff 74 b4 e8
RIP: kobject_uevent_env+0xa4/0xc80 lib/kobject_uevent.c:355 RSP: ffff8880a4a07ae8
---[ end trace b8eb63f8627e4887 ]---
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