SYZFAIL: failed to mkdir

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 35f4b1b9 ANDROID: GKI: Build in VIRTIO_FS
git tree: android12-5.4
console output: https://syzkaller.appspot.com/x/log.txt?x=1062b596d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=3c48afe0b88b8679
dashboard link: https://syzkaller.appspot.com/bug?extid=1a1276f53d52410c3d10
compiler: Debian clang version 11.0.1-2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1250a322d00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1a1276...@syzkaller.appspotmail.com

2021/02/22 00:05:59 executed programs: 175
2021/02/22 00:05:59 result: hanged=false err=executor 0: exit status 67
(errno 28: No space left on device)
SYZFAIL: failed to mkdir
loop exited with status 67


(errno 28: No space left on device)
SYZFAIL: failed to mkdir
loop exited with status 67
[K[ [0;31m* [0m] A start job is running for dev-ttyS0.device (26s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m] A start job is running for dev-ttyS0.device (26s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (27s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (27s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (28s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (28s / 1min 30s)[ 35.229553][ T655] cgroup1: Unknown subsys name 'perf_event'
[K[ [0;1;31m* [0m [0;31m* [ 35.696271][ T378] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
[0m] A start job is running for [ 35.707007][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
dev-ttyS0.device (29s / 1min 30s)[ 35.745754][ T152] device bridge_slave_1 left promiscuous mode
2021/02/22 00:06:04 executed programs: 497
2021/02/22 00:06:05 result: hanged=false err=executor 2: exit status 67
(errno 28: No space left on device)
SYZFAIL: failed to mkdir
loop exited with status 67


(errno 28: No space left on device)
SYZFAIL: failed to mkdir
loop exited with status 67
[K[ [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (29s / 1min 30s) [K[ [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (30s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (30s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (31s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (31s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (32s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m] A start job is running for dev-ttyS0.device (32s / 1min 30s) [K[ [0;31m* [0m] A start job is running for dev-ttyS0.device (33s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m] A start job is running for dev-ttyS0.device (33s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (34s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (34s / 1min 30s)[ 41.337928][ T1186] cgroup1: Unknown subsys name 'perf_event'
[K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (35s / 1min 30s)[ 41.700565][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
2021/02/22 00:06:09 result: hanged=false err=executor 0: exit status 67
(errno 28: No space left on device)
SYZFAIL: failed to mkdir
loop exited with status 67


(errno 28: No space left on device)
SYZFAIL: failed to mkdir
loop exited with status 67
[K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (35s / 1min 30s) [K[ [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (36s / 1min 30s) [K[ [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (36s / 1min 30s) [K[ [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (37s / 1min 30s) [K[ [0;31m* [0;1;31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (37s / 1min 30s)[ 44.495621][ T1422] cgroup1: Unknown subsys name 'perf_event'
2021/02/22 00:06:09 executed programs: 808
[K[ [0;31m* [0;1;[ 44.682816][ T1422] bridge0: port 1(bridge_slave_0) entered blocking state
31m* [0m [0;31m* [0m] A start job is running for dev-ttyS0.device (38s / 1min 30s)[ 44.705753][ T1422] bridge0: port 1(bridge_slave_0) entered disabled state


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