possible deadlock in vcs_read (2)
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syzbot
Nov 7, 2017, 12:36:04 PM11/7/17
to gre...@linuxfoundation.org, jsl...@suse.com, kste...@linuxfoundation.org, linux-...@vger.kernel.org, pombr...@nexb.com, syzkall...@googlegroups.com, tg...@linutronix.de
Hello,
syzkaller hit the following crash on
5a3517e009e979f21977d362212b7729c5165d92
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
======================================================
WARNING: possible circular locking dependency detected
4.14.0-rc7-next-20171103+ #38 Not tainted
------------------------------------------------------
syz-executor0/7956 is trying to acquire lock:
(console_lock){+.+.}, at: [<ffffffff82849989>] vcs_read+0x129/0xae0
drivers/tty/vt/vc_screen.c:219
but task is already holding lock:
(&pipe->mutex/1){+.+.}, at: [<ffffffff81af55f6>] pipe_lock_nested
fs/pipe.c:67 [inline]
(&pipe->mutex/1){+.+.}, at: [<ffffffff81af55f6>] pipe_lock+0x56/0x70
fs/pipe.c:75
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&pipe->mutex/1){+.+.}:
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004
__mutex_lock_common kernel/locking/mutex.c:756 [inline]
__mutex_lock+0x16f/0x19d0 kernel/locking/mutex.c:893
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
pipe_lock_nested fs/pipe.c:67 [inline]
pipe_lock+0x56/0x70 fs/pipe.c:75
iter_file_splice_write+0x264/0xf30 fs/splice.c:699
do_splice_from fs/splice.c:851 [inline]
do_splice fs/splice.c:1147 [inline]
SYSC_splice fs/splice.c:1402 [inline]
SyS_splice+0x7d5/0x1630 fs/splice.c:1382
entry_SYSCALL_64_fastpath+0x1f/0xbe
-> #2 (sb_writers){.+.+}:
spin_lock include/linux/spinlock.h:315 [inline]
lockref_put_or_lock+0x19/0x80 lib/lockref.c:143
-> #1 ((completion)&req.done){+.+.}:
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004
complete_acquire include/linux/completion.h:40 [inline]
__wait_for_common kernel/sched/completion.c:109 [inline]
wait_for_common kernel/sched/completion.c:123 [inline]
wait_for_completion+0xcb/0x7b0 kernel/sched/completion.c:144
devtmpfs_create_node+0x32b/0x4a0 drivers/base/devtmpfs.c:115
device_add+0x120f/0x1640 drivers/base/core.c:1824
device_create_groups_vargs+0x1f3/0x250 drivers/base/core.c:2430
device_create_vargs drivers/base/core.c:2470 [inline]
device_create+0xda/0x110 drivers/base/core.c:2506
vcs_make_sysfs+0x35/0x60 drivers/tty/vt/vc_screen.c:629
vc_allocate+0x4b7/0x6b0 drivers/tty/vt/vt.c:796
con_install+0x52/0x440 drivers/tty/vt/vt.c:2875
tty_driver_install_tty drivers/tty/tty_io.c:1214 [inline]
tty_init_dev+0xf6/0x4a0 drivers/tty/tty_io.c:1314
tty_open_by_driver drivers/tty/tty_io.c:1941 [inline]
tty_open+0x608/0xab0 drivers/tty/tty_io.c:1989
chrdev_open+0x257/0x730 fs/char_dev.c:417
do_dentry_open+0x67f/0xd70 fs/open.c:752
vfs_open+0x107/0x230 fs/open.c:866
do_last fs/namei.c:3388 [inline]
path_openat+0x1157/0x3520 fs/namei.c:3528
do_filp_open+0x25b/0x3b0 fs/namei.c:3563
do_sys_open+0x502/0x6d0 fs/open.c:1059
SYSC_open fs/open.c:1077 [inline]
SyS_open+0x2d/0x40 fs/open.c:1072
entry_SYSCALL_64_fastpath+0x1f/0xbe
-> #0 (console_lock){+.+.}:
check_prevs_add kernel/locking/lockdep.c:2031 [inline]
validate_chain kernel/locking/lockdep.c:2473 [inline]
__lock_acquire+0x3374/0x4770 kernel/locking/lockdep.c:3500
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004
console_lock+0x4b/0x80 kernel/printk/printk.c:2165
vcs_read+0x129/0xae0 drivers/tty/vt/vc_screen.c:219
do_loop_readv_writev fs/read_write.c:694 [inline]
do_iter_read+0x3db/0x5b0 fs/read_write.c:918
vfs_readv+0x121/0x1c0 fs/read_write.c:980
kernel_readv fs/splice.c:361 [inline]
default_file_splice_read+0x508/0xae0 fs/splice.c:416
do_splice_to+0x110/0x170 fs/splice.c:880
do_splice fs/splice.c:1173 [inline]
SYSC_splice fs/splice.c:1402 [inline]
SyS_splice+0x11a8/0x1630 fs/splice.c:1382
entry_SYSCALL_64_fastpath+0x1f/0xbe
other info that might help us debug this:
Chain exists of:
console_lock --> sb_writers --> &pipe->mutex/1
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&pipe->mutex/1);
lock(sb_writers);
lock(&pipe->mutex/1);
lock(console_lock);
*** DEADLOCK ***
1 lock held by syz-executor0/7956:
#0: (&pipe->mutex/1){+.+.}, at: [<ffffffff81af55f6>] pipe_lock_nested
fs/pipe.c:67 [inline]
#0: (&pipe->mutex/1){+.+.}, at: [<ffffffff81af55f6>] pipe_lock+0x56/0x70
fs/pipe.c:75
stack backtrace:
CPU: 0 PID: 7956 Comm: syz-executor0 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
print_circular_bug+0x503/0x710 kernel/locking/lockdep.c:1271
check_prev_add+0x8b1/0x1580 kernel/locking/lockdep.c:1914
check_prevs_add kernel/locking/lockdep.c:2031 [inline]
validate_chain kernel/locking/lockdep.c:2473 [inline]
__lock_acquire+0x3374/0x4770 kernel/locking/lockdep.c:3500
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004
console_lock+0x4b/0x80 kernel/printk/printk.c:2165
vcs_read+0x129/0xae0 drivers/tty/vt/vc_screen.c:219
do_loop_readv_writev fs/read_write.c:694 [inline]
do_iter_read+0x3db/0x5b0 fs/read_write.c:918
vfs_readv+0x121/0x1c0 fs/read_write.c:980
kernel_readv fs/splice.c:361 [inline]
default_file_splice_read+0x508/0xae0 fs/splice.c:416
do_splice_to+0x110/0x170 fs/splice.c:880
do_splice fs/splice.c:1173 [inline]
SYSC_splice fs/splice.c:1402 [inline]
SyS_splice+0x11a8/0x1630 fs/splice.c:1382
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007f2ada5bbbe8 EFLAGS: 00000212 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869
RDX: 0000000000000014 RSI: 0000000000000000 RDI: 0000000000000015
RBP: 0000000000000086 R08: 00000000000000c5 R09: 0000000000000008
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6ad0
R13: 00000000ffffffff R14: 00007f2ada5bc6d4 R15: 0000000000000000
device gre0 entered promiscuous mode
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=5
sclass=netlink_route_socket pig=7982 comm=syz-executor3
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=5
sclass=netlink_route_socket pig=7985 comm=syz-executor3
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 7977 Comm: syz-executor4 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
FAULT_FLAG_ALLOW_RETRY missing 30
handle_userfault+0x12fa/0x24c0 fs/userfaultfd.c:427
do_anonymous_page mm/memory.c:3121 [inline]
handle_pte_fault mm/memory.c:3934 [inline]
__handle_mm_fault+0x2d46/0x39c0 mm/memory.c:4060
handle_mm_fault+0x334/0x8d0 mm/memory.c:4097
__do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1449
do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1524
page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1067
RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline]
RIP: 0010:iov_iter_fault_in_readable+0x1a7/0x410 lib/iov_iter.c:421
RSP: 0018:ffff8801c4397928 EFLAGS: 00010246
RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff8241c491
RDX: 000000000000013a RSI: ffffc9000233d000 RDI: ffff8801c4397d28
RBP: ffff8801c4397a08 R08: 1ffff10038d4a19a R09: 1ffff10038872f1a
R10: ffff8801c4397ad0 R11: ffff8801d79483c0 R12: 1ffff10038872f28
R13: ffff8801c43979e0 R14: 0000000000000000 R15: ffff8801c4397d20
generic_perform_write+0x200/0x600 mm/filemap.c:3128
__generic_file_write_iter+0x366/0x5b0 mm/filemap.c:3263
generic_file_write_iter+0x399/0x7a0 mm/filemap.c:3291
call_write_iter include/linux/fs.h:1771 [inline]
new_sync_write fs/read_write.c:469 [inline]
__vfs_write+0x68a/0x970 fs/read_write.c:482
vfs_write+0x18f/0x510 fs/read_write.c:544
SYSC_write fs/read_write.c:589 [inline]
SyS_write+0xef/0x220 fs/read_write.c:581
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007f41a3171be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869
RDX: 0000000000000030 RSI: 0000000020011fd2 RDI: 0000000000000014
RBP: 0000000000000058 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ee8e0
R13: 00000000ffffffff R14: 00007f41a31726d4 R15: 0000000000000000
CPU: 0 PID: 7992 Comm: syz-executor4 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
handle_userfault+0x12fa/0x24c0 fs/userfaultfd.c:427
do_anonymous_page mm/memory.c:3121 [inline]
handle_pte_fault mm/memory.c:3934 [inline]
__handle_mm_fault+0x2d46/0x39c0 mm/memory.c:4060
handle_mm_fault+0x334/0x8d0 mm/memory.c:4097
__do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1449
do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1524
page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1067
RIP: 0010:do_strnlen_user lib/strnlen_user.c:49 [inline]
RIP: 0010:strnlen_user+0x15c/0x300 lib/strnlen_user.c:118
RSP: 0018:ffff8801d33afdb8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000020012000 RCX: ffffffff82566057
RDX: 8080808080808080 RSI: ffffc9000243f000 RDI: ffff8801d33afe10
RBP: ffff8801d33afe70 R08: ffffed003b5b3db0 R09: ffffed003b5b3db0
R10: 0000000000000001 R11: ffffed003b5b3db0 R12: ffff8801d33afe48
R13: 0000000000000000 R14: 1ffff1003a675fbd R15: 0000000000001000
strndup_user+0x28/0xb0 mm/util.c:187
SYSC_request_key security/keys/keyctl.c:186 [inline]
SyS_request_key+0xbb/0x2a0 security/keys/keyctl.c:158
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007f41a312fbe8 EFLAGS: 00000212 ORIG_RAX: 00000000000000f9
RAX: ffffffffffffffda RBX: 0000000000758190 RCX: 0000000000452869
RDX: 0000000020012000 RSI: 0000000020001000 RDI: 0000000020000ffa
RBP: 0000000000a6f880 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007f41a31309c0 R15: 0000000000000012
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor5'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor5'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor5'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor5'.
netlink: 2 bytes leftover after parsing attributes in process
`syz-executor7'.
netlink: 2 bytes leftover after parsing attributes in process
`syz-executor7'.
netlink: 2 bytes leftover after parsing attributes in process
`syz-executor7'.
netlink: 2 bytes leftover after parsing attributes in process
`syz-executor7'.
sctp: [Deprecated]: syz-executor4 (pid 8106) Use of int in maxseg socket
option.
Use struct sctp_assoc_value instead
sctp: [Deprecated]: syz-executor4 (pid 8106) Use of int in maxseg socket
option.
Use struct sctp_assoc_value instead
audit: type=1326 audit(1510068022.415:399): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0
ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068022.415:400): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=2 compat=0
ip=0x40cba1 code=0x7ffc0000
audit: type=1326 audit(1510068022.415:401): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0
ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068022.415:402): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=16 compat=0
ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068022.415:403): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0
ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068022.415:404): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0
ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068022.436:405): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=5 compat=0
ip=0x452869 code=0x7ffc0000
device syz7 entered promiscuous mode
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=32
sclass=netlink_audit_socket pig=8336 comm=syz-executor6
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=32
sclass=netlink_audit_socket pig=8336 comm=syz-executor6
IPv6: ADDRCONF(NETDEV_UP): syz5: link is not ready
IPv6: ADDRCONF(NETDEV_UP): syz5: link is not ready
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0
sclass=netlink_route_socket pig=8544 comm=syz-executor6
nla_parse: 8 callbacks suppressed
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
device lo entered promiscuous mode
device lo left promiscuous mode
QAT: Invalid ioctl
QAT: Invalid ioctl
QAT: Invalid ioctl
QAT: Invalid ioctl
dccp_close: ABORT with 1 bytes unread
device lo entered promiscuous mode
device gre0 entered promiscuous mode
RDS: rds_bind could not find a transport for 172.20.5.170, load rds_tcp or
rds_rdma?
RDS: rds_bind could not find a transport for 172.20.5.170, load rds_tcp or
rds_rdma?
Started in network mode
Own node address <160.2196.1415>, network identity 4711
kvm [9335]: vcpu1, guest rIP: 0x0 Hyper-V uhandled wrmsr: 0x40000087 data
0x10000001000
kvm [9335]: vcpu1, guest rIP: 0x0 Hyper-V uhandled wrmsr: 0x40000087 data
0x10000001000
handle_userfault: 34 callbacks suppressed
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 9337 Comm: syz-executor1 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
handle_userfault+0x12fa/0x24c0 fs/userfaultfd.c:427
do_anonymous_page mm/memory.c:3121 [inline]
handle_pte_fault mm/memory.c:3934 [inline]
__handle_mm_fault+0x2d46/0x39c0 mm/memory.c:4060
handle_mm_fault+0x334/0x8d0 mm/memory.c:4097
__do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1449
do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1524
page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1067
RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline]
RIP: 0010:iov_iter_fault_in_readable+0x1a7/0x410 lib/iov_iter.c:421
RSP: 0018:ffff8801d95ff928 EFLAGS: 00010246
RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff8241c491
RDX: 000000000000013c RSI: ffffc900022bc000 RDI: ffff8801d95ffd28
RBP: ffff8801d95ffa08 R08: 1ffff10038cba092 R09: 1ffff1003b2bff1a
R10: ffff8801d95ffad0 R11: ffff8801d948e2c0 R12: 1ffff1003b2bff28
R13: ffff8801d95ff9e0 R14: 0000000000000000 R15: ffff8801d95ffd20
generic_perform_write+0x200/0x600 mm/filemap.c:3128
__generic_file_write_iter+0x366/0x5b0 mm/filemap.c:3263
generic_file_write_iter+0x399/0x7a0 mm/filemap.c:3291
call_write_iter include/linux/fs.h:1771 [inline]
new_sync_write fs/read_write.c:469 [inline]
__vfs_write+0x68a/0x970 fs/read_write.c:482
vfs_write+0x18f/0x510 fs/read_write.c:544
SYSC_write fs/read_write.c:589 [inline]
SyS_write+0xef/0x220 fs/read_write.c:581
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007ff1846f6be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869
RDX: 000000000000001c RSI: 0000000020011fd2 RDI: 0000000000000015
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007ff1846f79c0 R15: 0000000000000000
netlink: 5 bytes leftover after parsing attributes in process
`syz-executor0'.
IPv6: Can't replace route, no match found
netlink: 5 bytes leftover after parsing attributes in process
`syz-executor0'.
IPv6: Can't replace route, no match found
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
audit: type=1326 audit(1510068029.274:440): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=202 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:441): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=16 compat=0 ip=0x452869 code=0x7ffc0000
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
audit: type=1326 audit(1510068029.274:442): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=202 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:443): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=72 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:444): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=202 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:445): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=54 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:446): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=202 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:447): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=20 compat=0 ip=0x452741 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:448): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=202 compat=0 ip=0x452869 code=0x7ffc0000
device lo left promiscuous mode
Bearer <> rejected, illegal name
Bearer <> rejected, illegal name
netlink: 14 bytes leftover after parsing attributes in process
`syz-executor5'.
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 1 PID: 9666 Comm: syz-executor3 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
fail_dump lib/fault-inject.c:51 [inline]
should_fail+0x8c0/0xa40 lib/fault-inject.c:149
should_failslab+0xec/0x120 mm/failslab.c:32
slab_pre_alloc_hook mm/slab.h:425 [inline]
slab_alloc_node mm/slab.c:3294 [inline]
kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3637
__alloc_skb+0xf1/0x780 net/core/skbuff.c:193
alloc_skb include/linux/skbuff.h:982 [inline]
netlink_alloc_large_skb net/netlink/af_netlink.c:1145 [inline]
netlink_sendmsg+0xa86/0xe70 net/netlink/af_netlink.c:1837
sock_sendmsg_nosec net/socket.c:632 [inline]
sock_sendmsg+0xca/0x110 net/socket.c:642
___sys_sendmsg+0x75b/0x8a0 net/socket.c:2048
__sys_sendmsg+0xe5/0x210 net/socket.c:2082
SYSC_sendmsg net/socket.c:2093 [inline]
SyS_sendmsg+0x2d/0x50 net/socket.c:2089
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007fe369b31be8 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869
RDX: 0000000000000000 RSI: 0000000020012808 RDI: 0000000000000014
RBP: 00007fe369b31a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b7550
R13: 00007fe369b31b58 R14: 00000000004b7560 R15: 0000000000000000
netlink: 14 bytes leftover after parsing attributes in process
`syz-executor5'.
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 9684 Comm: syz-executor3 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
fail_dump lib/fault-inject.c:51 [inline]
should_fail+0x8c0/0xa40 lib/fault-inject.c:149
---
This bug is generated by a dumb bot. It may contain errors.
See https://goo.gl/tpsmEJ for details.
Direct all questions to syzk...@googlegroups.com.
Please credit me with: Reported-by: syzbot <syzk...@googlegroups.com>
syzbot will keep track of this bug report.
Once a fix for this bug is committed, please reply to this email with:
#syz fix: exact-commit-title
To mark this as a duplicate of another syzbot report, please reply with:
#syz dup: exact-subject-of-another-report
If it's a one-off invalid bug report, please reply with:
#syz invalid
Note: if the crash happens again, it will cause creation of a new bug
report.
Note: all commands must start from beginning of the line.
syzkaller hit the following crash on
5a3517e009e979f21977d362212b7729c5165d92
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
======================================================
WARNING: possible circular locking dependency detected
4.14.0-rc7-next-20171103+ #38 Not tainted
------------------------------------------------------
syz-executor0/7956 is trying to acquire lock:
(console_lock){+.+.}, at: [<ffffffff82849989>] vcs_read+0x129/0xae0
drivers/tty/vt/vc_screen.c:219
but task is already holding lock:
(&pipe->mutex/1){+.+.}, at: [<ffffffff81af55f6>] pipe_lock_nested
fs/pipe.c:67 [inline]
(&pipe->mutex/1){+.+.}, at: [<ffffffff81af55f6>] pipe_lock+0x56/0x70
fs/pipe.c:75
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&pipe->mutex/1){+.+.}:
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004
__mutex_lock_common kernel/locking/mutex.c:756 [inline]
__mutex_lock+0x16f/0x19d0 kernel/locking/mutex.c:893
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
pipe_lock_nested fs/pipe.c:67 [inline]
pipe_lock+0x56/0x70 fs/pipe.c:75
iter_file_splice_write+0x264/0xf30 fs/splice.c:699
do_splice_from fs/splice.c:851 [inline]
do_splice fs/splice.c:1147 [inline]
SYSC_splice fs/splice.c:1402 [inline]
SyS_splice+0x7d5/0x1630 fs/splice.c:1382
entry_SYSCALL_64_fastpath+0x1f/0xbe
-> #2 (sb_writers){.+.+}:
spin_lock include/linux/spinlock.h:315 [inline]
lockref_put_or_lock+0x19/0x80 lib/lockref.c:143
-> #1 ((completion)&req.done){+.+.}:
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004
complete_acquire include/linux/completion.h:40 [inline]
__wait_for_common kernel/sched/completion.c:109 [inline]
wait_for_common kernel/sched/completion.c:123 [inline]
wait_for_completion+0xcb/0x7b0 kernel/sched/completion.c:144
devtmpfs_create_node+0x32b/0x4a0 drivers/base/devtmpfs.c:115
device_add+0x120f/0x1640 drivers/base/core.c:1824
device_create_groups_vargs+0x1f3/0x250 drivers/base/core.c:2430
device_create_vargs drivers/base/core.c:2470 [inline]
device_create+0xda/0x110 drivers/base/core.c:2506
vcs_make_sysfs+0x35/0x60 drivers/tty/vt/vc_screen.c:629
vc_allocate+0x4b7/0x6b0 drivers/tty/vt/vt.c:796
con_install+0x52/0x440 drivers/tty/vt/vt.c:2875
tty_driver_install_tty drivers/tty/tty_io.c:1214 [inline]
tty_init_dev+0xf6/0x4a0 drivers/tty/tty_io.c:1314
tty_open_by_driver drivers/tty/tty_io.c:1941 [inline]
tty_open+0x608/0xab0 drivers/tty/tty_io.c:1989
chrdev_open+0x257/0x730 fs/char_dev.c:417
do_dentry_open+0x67f/0xd70 fs/open.c:752
vfs_open+0x107/0x230 fs/open.c:866
do_last fs/namei.c:3388 [inline]
path_openat+0x1157/0x3520 fs/namei.c:3528
do_filp_open+0x25b/0x3b0 fs/namei.c:3563
do_sys_open+0x502/0x6d0 fs/open.c:1059
SYSC_open fs/open.c:1077 [inline]
SyS_open+0x2d/0x40 fs/open.c:1072
entry_SYSCALL_64_fastpath+0x1f/0xbe
-> #0 (console_lock){+.+.}:
check_prevs_add kernel/locking/lockdep.c:2031 [inline]
validate_chain kernel/locking/lockdep.c:2473 [inline]
__lock_acquire+0x3374/0x4770 kernel/locking/lockdep.c:3500
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004
console_lock+0x4b/0x80 kernel/printk/printk.c:2165
vcs_read+0x129/0xae0 drivers/tty/vt/vc_screen.c:219
do_loop_readv_writev fs/read_write.c:694 [inline]
do_iter_read+0x3db/0x5b0 fs/read_write.c:918
vfs_readv+0x121/0x1c0 fs/read_write.c:980
kernel_readv fs/splice.c:361 [inline]
default_file_splice_read+0x508/0xae0 fs/splice.c:416
do_splice_to+0x110/0x170 fs/splice.c:880
do_splice fs/splice.c:1173 [inline]
SYSC_splice fs/splice.c:1402 [inline]
SyS_splice+0x11a8/0x1630 fs/splice.c:1382
entry_SYSCALL_64_fastpath+0x1f/0xbe
other info that might help us debug this:
Chain exists of:
console_lock --> sb_writers --> &pipe->mutex/1
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&pipe->mutex/1);
lock(sb_writers);
lock(&pipe->mutex/1);
lock(console_lock);
*** DEADLOCK ***
1 lock held by syz-executor0/7956:
#0: (&pipe->mutex/1){+.+.}, at: [<ffffffff81af55f6>] pipe_lock_nested
fs/pipe.c:67 [inline]
#0: (&pipe->mutex/1){+.+.}, at: [<ffffffff81af55f6>] pipe_lock+0x56/0x70
fs/pipe.c:75
stack backtrace:
CPU: 0 PID: 7956 Comm: syz-executor0 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
print_circular_bug+0x503/0x710 kernel/locking/lockdep.c:1271
check_prev_add+0x8b1/0x1580 kernel/locking/lockdep.c:1914
check_prevs_add kernel/locking/lockdep.c:2031 [inline]
validate_chain kernel/locking/lockdep.c:2473 [inline]
__lock_acquire+0x3374/0x4770 kernel/locking/lockdep.c:3500
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004
console_lock+0x4b/0x80 kernel/printk/printk.c:2165
vcs_read+0x129/0xae0 drivers/tty/vt/vc_screen.c:219
do_loop_readv_writev fs/read_write.c:694 [inline]
do_iter_read+0x3db/0x5b0 fs/read_write.c:918
vfs_readv+0x121/0x1c0 fs/read_write.c:980
kernel_readv fs/splice.c:361 [inline]
default_file_splice_read+0x508/0xae0 fs/splice.c:416
do_splice_to+0x110/0x170 fs/splice.c:880
do_splice fs/splice.c:1173 [inline]
SYSC_splice fs/splice.c:1402 [inline]
SyS_splice+0x11a8/0x1630 fs/splice.c:1382
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007f2ada5bbbe8 EFLAGS: 00000212 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869
RDX: 0000000000000014 RSI: 0000000000000000 RDI: 0000000000000015
RBP: 0000000000000086 R08: 00000000000000c5 R09: 0000000000000008
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6ad0
R13: 00000000ffffffff R14: 00007f2ada5bc6d4 R15: 0000000000000000
device gre0 entered promiscuous mode
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=5
sclass=netlink_route_socket pig=7982 comm=syz-executor3
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=5
sclass=netlink_route_socket pig=7985 comm=syz-executor3
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 7977 Comm: syz-executor4 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
FAULT_FLAG_ALLOW_RETRY missing 30
handle_userfault+0x12fa/0x24c0 fs/userfaultfd.c:427
do_anonymous_page mm/memory.c:3121 [inline]
handle_pte_fault mm/memory.c:3934 [inline]
__handle_mm_fault+0x2d46/0x39c0 mm/memory.c:4060
handle_mm_fault+0x334/0x8d0 mm/memory.c:4097
__do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1449
do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1524
page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1067
RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline]
RIP: 0010:iov_iter_fault_in_readable+0x1a7/0x410 lib/iov_iter.c:421
RSP: 0018:ffff8801c4397928 EFLAGS: 00010246
RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff8241c491
RDX: 000000000000013a RSI: ffffc9000233d000 RDI: ffff8801c4397d28
RBP: ffff8801c4397a08 R08: 1ffff10038d4a19a R09: 1ffff10038872f1a
R10: ffff8801c4397ad0 R11: ffff8801d79483c0 R12: 1ffff10038872f28
R13: ffff8801c43979e0 R14: 0000000000000000 R15: ffff8801c4397d20
generic_perform_write+0x200/0x600 mm/filemap.c:3128
__generic_file_write_iter+0x366/0x5b0 mm/filemap.c:3263
generic_file_write_iter+0x399/0x7a0 mm/filemap.c:3291
call_write_iter include/linux/fs.h:1771 [inline]
new_sync_write fs/read_write.c:469 [inline]
__vfs_write+0x68a/0x970 fs/read_write.c:482
vfs_write+0x18f/0x510 fs/read_write.c:544
SYSC_write fs/read_write.c:589 [inline]
SyS_write+0xef/0x220 fs/read_write.c:581
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007f41a3171be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869
RDX: 0000000000000030 RSI: 0000000020011fd2 RDI: 0000000000000014
RBP: 0000000000000058 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ee8e0
R13: 00000000ffffffff R14: 00007f41a31726d4 R15: 0000000000000000
CPU: 0 PID: 7992 Comm: syz-executor4 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
handle_userfault+0x12fa/0x24c0 fs/userfaultfd.c:427
do_anonymous_page mm/memory.c:3121 [inline]
handle_pte_fault mm/memory.c:3934 [inline]
__handle_mm_fault+0x2d46/0x39c0 mm/memory.c:4060
handle_mm_fault+0x334/0x8d0 mm/memory.c:4097
__do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1449
do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1524
page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1067
RIP: 0010:do_strnlen_user lib/strnlen_user.c:49 [inline]
RIP: 0010:strnlen_user+0x15c/0x300 lib/strnlen_user.c:118
RSP: 0018:ffff8801d33afdb8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000020012000 RCX: ffffffff82566057
RDX: 8080808080808080 RSI: ffffc9000243f000 RDI: ffff8801d33afe10
RBP: ffff8801d33afe70 R08: ffffed003b5b3db0 R09: ffffed003b5b3db0
R10: 0000000000000001 R11: ffffed003b5b3db0 R12: ffff8801d33afe48
R13: 0000000000000000 R14: 1ffff1003a675fbd R15: 0000000000001000
strndup_user+0x28/0xb0 mm/util.c:187
SYSC_request_key security/keys/keyctl.c:186 [inline]
SyS_request_key+0xbb/0x2a0 security/keys/keyctl.c:158
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007f41a312fbe8 EFLAGS: 00000212 ORIG_RAX: 00000000000000f9
RAX: ffffffffffffffda RBX: 0000000000758190 RCX: 0000000000452869
RDX: 0000000020012000 RSI: 0000000020001000 RDI: 0000000020000ffa
RBP: 0000000000a6f880 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007f41a31309c0 R15: 0000000000000012
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor5'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor5'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor5'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor5'.
netlink: 2 bytes leftover after parsing attributes in process
`syz-executor7'.
netlink: 2 bytes leftover after parsing attributes in process
`syz-executor7'.
netlink: 2 bytes leftover after parsing attributes in process
`syz-executor7'.
netlink: 2 bytes leftover after parsing attributes in process
`syz-executor7'.
sctp: [Deprecated]: syz-executor4 (pid 8106) Use of int in maxseg socket
option.
Use struct sctp_assoc_value instead
sctp: [Deprecated]: syz-executor4 (pid 8106) Use of int in maxseg socket
option.
Use struct sctp_assoc_value instead
audit: type=1326 audit(1510068022.415:399): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0
ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068022.415:400): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=2 compat=0
ip=0x40cba1 code=0x7ffc0000
audit: type=1326 audit(1510068022.415:401): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0
ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068022.415:402): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=16 compat=0
ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068022.415:403): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0
ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068022.415:404): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0
ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068022.436:405): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=8143 comm="syz-executor2"
exe="/root/syz-executor2" sig=0 arch=c000003e syscall=5 compat=0
ip=0x452869 code=0x7ffc0000
device syz7 entered promiscuous mode
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=32
sclass=netlink_audit_socket pig=8336 comm=syz-executor6
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=32
sclass=netlink_audit_socket pig=8336 comm=syz-executor6
IPv6: ADDRCONF(NETDEV_UP): syz5: link is not ready
IPv6: ADDRCONF(NETDEV_UP): syz5: link is not ready
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0
sclass=netlink_route_socket pig=8544 comm=syz-executor6
nla_parse: 8 callbacks suppressed
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
device lo entered promiscuous mode
device lo left promiscuous mode
QAT: Invalid ioctl
QAT: Invalid ioctl
QAT: Invalid ioctl
QAT: Invalid ioctl
dccp_close: ABORT with 1 bytes unread
device lo entered promiscuous mode
device gre0 entered promiscuous mode
RDS: rds_bind could not find a transport for 172.20.5.170, load rds_tcp or
rds_rdma?
RDS: rds_bind could not find a transport for 172.20.5.170, load rds_tcp or
rds_rdma?
Started in network mode
Own node address <160.2196.1415>, network identity 4711
kvm [9335]: vcpu1, guest rIP: 0x0 Hyper-V uhandled wrmsr: 0x40000087 data
0x10000001000
kvm [9335]: vcpu1, guest rIP: 0x0 Hyper-V uhandled wrmsr: 0x40000087 data
0x10000001000
handle_userfault: 34 callbacks suppressed
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 9337 Comm: syz-executor1 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
handle_userfault+0x12fa/0x24c0 fs/userfaultfd.c:427
do_anonymous_page mm/memory.c:3121 [inline]
handle_pte_fault mm/memory.c:3934 [inline]
__handle_mm_fault+0x2d46/0x39c0 mm/memory.c:4060
handle_mm_fault+0x334/0x8d0 mm/memory.c:4097
__do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1449
do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1524
page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1067
RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline]
RIP: 0010:iov_iter_fault_in_readable+0x1a7/0x410 lib/iov_iter.c:421
RSP: 0018:ffff8801d95ff928 EFLAGS: 00010246
RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff8241c491
RDX: 000000000000013c RSI: ffffc900022bc000 RDI: ffff8801d95ffd28
RBP: ffff8801d95ffa08 R08: 1ffff10038cba092 R09: 1ffff1003b2bff1a
R10: ffff8801d95ffad0 R11: ffff8801d948e2c0 R12: 1ffff1003b2bff28
R13: ffff8801d95ff9e0 R14: 0000000000000000 R15: ffff8801d95ffd20
generic_perform_write+0x200/0x600 mm/filemap.c:3128
__generic_file_write_iter+0x366/0x5b0 mm/filemap.c:3263
generic_file_write_iter+0x399/0x7a0 mm/filemap.c:3291
call_write_iter include/linux/fs.h:1771 [inline]
new_sync_write fs/read_write.c:469 [inline]
__vfs_write+0x68a/0x970 fs/read_write.c:482
vfs_write+0x18f/0x510 fs/read_write.c:544
SYSC_write fs/read_write.c:589 [inline]
SyS_write+0xef/0x220 fs/read_write.c:581
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007ff1846f6be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869
RDX: 000000000000001c RSI: 0000000020011fd2 RDI: 0000000000000015
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007ff1846f79c0 R15: 0000000000000000
netlink: 5 bytes leftover after parsing attributes in process
`syz-executor0'.
IPv6: Can't replace route, no match found
netlink: 5 bytes leftover after parsing attributes in process
`syz-executor0'.
IPv6: Can't replace route, no match found
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
audit: type=1326 audit(1510068029.274:440): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=202 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:441): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=16 compat=0 ip=0x452869 code=0x7ffc0000
netlink: 3 bytes leftover after parsing attributes in process
`syz-executor4'.
audit: type=1326 audit(1510068029.274:442): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=202 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:443): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=72 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:444): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=202 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:445): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=54 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:446): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=202 compat=0 ip=0x452869 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:447): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=20 compat=0 ip=0x452741 code=0x7ffc0000
audit: type=1326 audit(1510068029.274:448): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=kernel pid=9522 comm="" exe="/root/syz-executor4" sig=0
arch=c000003e syscall=202 compat=0 ip=0x452869 code=0x7ffc0000
device lo left promiscuous mode
Bearer <> rejected, illegal name
Bearer <> rejected, illegal name
netlink: 14 bytes leftover after parsing attributes in process
`syz-executor5'.
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 1 PID: 9666 Comm: syz-executor3 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
fail_dump lib/fault-inject.c:51 [inline]
should_fail+0x8c0/0xa40 lib/fault-inject.c:149
should_failslab+0xec/0x120 mm/failslab.c:32
slab_pre_alloc_hook mm/slab.h:425 [inline]
slab_alloc_node mm/slab.c:3294 [inline]
kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3637
__alloc_skb+0xf1/0x780 net/core/skbuff.c:193
alloc_skb include/linux/skbuff.h:982 [inline]
netlink_alloc_large_skb net/netlink/af_netlink.c:1145 [inline]
netlink_sendmsg+0xa86/0xe70 net/netlink/af_netlink.c:1837
sock_sendmsg_nosec net/socket.c:632 [inline]
sock_sendmsg+0xca/0x110 net/socket.c:642
___sys_sendmsg+0x75b/0x8a0 net/socket.c:2048
__sys_sendmsg+0xe5/0x210 net/socket.c:2082
SYSC_sendmsg net/socket.c:2093 [inline]
SyS_sendmsg+0x2d/0x50 net/socket.c:2089
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452869
RSP: 002b:00007fe369b31be8 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869
RDX: 0000000000000000 RSI: 0000000020012808 RDI: 0000000000000014
RBP: 00007fe369b31a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b7550
R13: 00007fe369b31b58 R14: 00000000004b7560 R15: 0000000000000000
netlink: 14 bytes leftover after parsing attributes in process
`syz-executor5'.
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 9684 Comm: syz-executor3 Not tainted 4.14.0-rc7-next-20171103+
#38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
fail_dump lib/fault-inject.c:51 [inline]
should_fail+0x8c0/0xa40 lib/fault-inject.c:149
---
This bug is generated by a dumb bot. It may contain errors.
See https://goo.gl/tpsmEJ for details.
Direct all questions to syzk...@googlegroups.com.
Please credit me with: Reported-by: syzbot <syzk...@googlegroups.com>
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syzbot
Feb 22, 2019, 5:34:26 AM2/22/19
to syzkall...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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