syzbot


general protection fault in tcf_mirred_init

Status: auto-closed as invalid on 2020/07/17 22:03
Reported-by: syzbot+a3d4c62a985f31c28035@syzkaller.appspotmail.com
First crash: 839d, last: 839d

Sample crash report:
audit: type=1400 audit(1584655355.900:1190): avc:  denied  { map } for  pid=979 comm="blkid" path="/sbin/blkid" dev="sda1" ino=16128 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1
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: 1 PID: 977 Comm: syz-executor.0 Not tainted 4.14.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808b6ac440 task.stack: ffff888171eb8000
RIP: 0010:tcf_mirred_init+0xb3c/0xce0 net/sched/act_mirred.c:144
RSP: 0018:ffff888171ebf340 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff10279bc
RDX: 00000000000000a8 RSI: ffffffff850e9e76 RDI: 0000000000000540
RBP: ffff88808ec47c80 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888171ebf450 R14: ffff88808ec47d70 R15: ffff8880a8ab3e00
FS:  00007ff7ccf4d700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 00000001687ee000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tcf_action_init_1+0x51a/0x9f0 net/sched/act_api.c:682
 tcf_action_init+0x26d/0x400 net/sched/act_api.c:751
 tcf_action_add net/sched/act_api.c:1079 [inline]
 tc_ctl_action+0x2e3/0x513 net/sched/act_api.c:1131
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315
 netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2433
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x620 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x733/0xbe0 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xc5/0x100 net/socket.c:656
 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c849
RSP: 002b:00007ff7ccf4cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff7ccf4d6d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000007
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009f9 R14: 00000000004ccb11 R15: 000000000076bf0c
Code: ea 03 80 3c 02 00 0f 85 ac 01 00 00 48 8b 9d f0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 40 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 79 01 00 00 48 8b 83 40 05 00 00 65 ff 08 e9 
RIP: tcf_mirred_init+0xb3c/0xce0 net/sched/act_mirred.c:144 RSP: ffff888171ebf340
FAT-fs (loop3): Unrecognized mount option "obj_user=mounts" or missing value
audit: type=1400 audit(1584655356.830:1191): avc:  denied  { map } for  pid=994 comm="blkid" path="/sbin/blkid" dev="sda1" ino=16128 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/03/19 22:02 linux-4.14.y 12cd844a39ed 2c31c529 .config log report