audit: type=1400 audit(1603168648.631:14): avc: denied { name_connect } for pid=8066 comm="syz-executor.4" dest=20000 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 ================================================================================ UBSAN: Undefined behaviour in sound/core/oss/pcm_oss.c:720:23 shift exponent 65532 is too large for 32-bit type 'int' CPU: 0 PID: 8045 Comm: syz-executor.2 Not tainted 4.19.152-syzkaller #0 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+0x22c/0x33e lib/dump_stack.c:118 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161 __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 lib/ubsan.c:422 snd_pcm_oss_period_size sound/core/oss/pcm_oss.c:720 [inline] snd_pcm_oss_change_params_locked.cold+0xf7/0x11a sound/core/oss/pcm_oss.c:943 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1102 [inline] snd_pcm_oss_make_ready+0xe6/0x2e0 sound/core/oss/pcm_oss.c:1161 snd_pcm_oss_sync+0x1de/0x870 sound/core/oss/pcm_oss.c:1722 snd_pcm_oss_release+0x26c/0x300 sound/core/oss/pcm_oss.c:2561 __fput+0x2ce/0x8a0 fs/file_table.c:278 task_work_run+0x141/0x1c0 kernel/task_work.c:113 get_signal+0x1da6/0x2270 kernel/signal.c:2399 do_signal+0x8f/0x1690 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x204/0x2c0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x57c/0x670 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45de59 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa388fccc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 0000000000016300 RCX: 000000000045de59 RDX: 00000000200000c0 RSI: 00000000c004500a RDI: 0000000000000006 RBP: 000000000118c008 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfd4 R13: 00007fff5997e16f R14: 00007fa388fcd9c0 R15: 000000000118bfd4 ================================================================================ netlink: 'syz-executor.5': attribute type 6 has an invalid length. audit: type=1400 audit(1603168648.761:15): avc: denied { ioctl } for pid=8066 comm="syz-executor.4" path="socket:[30451]" dev="sockfs" ino=30451 ioctlcmd=0x89f7 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1 audit: type=1804 audit(1603168649.041:16): pid=8104 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir498977797/syzkaller.dybSQa/1/bus" dev="sda1" ino=15768 res=1 EXT4-fs (loop2): VFS: Can't find ext4 filesystem audit: type=1804 audit(1603168649.441:17): pid=8114 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir565223415/syzkaller.OMUumM/4/memory.events" dev="sda1" ino=15753 res=1 EXT4-fs (loop2): VFS: Can't find ext4 filesystem netlink: 'syz-executor.5': attribute type 6 has an invalid length. nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. audit: type=1804 audit(1603168651.011:18): pid=8167 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir123071011/syzkaller.lXxkqz/3/memory.events" dev="sda1" ino=15768 res=1 FAT-fs (loop1): IO charset maccrillic not found mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs (loop5): couldn't mount as ext2 due to feature incompatibilities netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs (loop5): couldn't mount as ext2 due to feature incompatibilities netlink: 'syz-executor.3': attribute type 5 has an invalid length. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1792 sclass=netlink_route_socket pid=8397 comm=syz-executor.3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1792 sclass=netlink_route_socket pid=8397 comm=syz-executor.3 netlink: 'syz-executor.3': attribute type 5 has an invalid length. netlink: 'syz-executor.1': attribute type 1 has an invalid length. netlink: 'syz-executor.1': attribute type 1 has an invalid length. IPVS: length: 220 != 8 Dev loop1: unable to read RDB block 1 loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) netlink: 3286 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 3286 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 3286 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 3286 bytes leftover after parsing attributes in process `syz-executor.0'. BTRFS: device fsid f90cac8b-044b-4fa8-8bee-4b8d3da88dc2 devid 1 transid 7 /dev/loop3 nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. BTRFS info (device loop3): disk space caching is enabled BTRFS info (device loop3): has skinny extents netlink: 28 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. FAT-fs (loop3): Unrecognized mount option "Azɚ߱" or missing value kauditd_printk_skb: 4 callbacks suppressed audit: type=1804 audit(1603168656.151:23): pid=8707 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir057664978/syzkaller.rdquFn/16/file1/file0" dev="sda1" ino=15796 res=1 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters.