================================================================================ UBSAN: Undefined behaviour in arch/x86/kernel/uprobes.c:276:56 index 4 is out of range for type 'insn_byte_t [4]' CPU: 1 PID: 8639 Comm: syz-executor.0 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_out_of_bounds.cold+0x63/0x6f lib/ubsan.c:383 is_prefix_bad arch/x86/kernel/uprobes.c:276 [inline] uprobe_init_insn arch/x86/kernel/uprobes.c:299 [inline] arch_uprobe_analyze_insn+0x9d8/0xaa0 arch/x86/kernel/uprobes.c:868 IPVS: ftp: loaded support on port[0] = 21 prepare_uprobe kernel/events/uprobes.c:611 [inline] install_breakpoint kernel/events/uprobes.c:654 [inline] uprobe_mmap+0x8c2/0xa70 kernel/events/uprobes.c:1096 mmap_region+0x552/0x1510 mm/mmap.c:1803 do_mmap+0x8e8/0x1080 mm/mmap.c:1530 do_mmap_pgoff include/linux/mm.h:2326 [inline] vm_mmap_pgoff+0x197/0x200 mm/util.c:357 ksys_mmap_pgoff+0x2d1/0x660 mm/mmap.c:1580 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 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:00007f207870bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000021400 RCX: 000000000045de59 RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020007000 RBP: 000000000118bf78 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000412 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffc9275583f R14: 00007f207870c9c0 R15: 000000000118bf2c ================================================================================ BTRFS: device fsid f90cac8b-044b-4fa8-8bee-4b8d3da88dc2 devid 1 transid 7 /dev/loop3 IPVS: ftp: loaded support on port[0] = 21 EXT4-fs (loop1): Invalid log cluster size: 13568 BTRFS info (device loop3): unrecognized mount option 't<elog' BTRFS error (device loop3): open_ctree failed audit: type=1800 audit(1602976431.998:9): pid=8741 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="bus" dev="sda1" ino=15839 res=0 BTRFS info (device loop3): unrecognized mount option 't<elog' BTRFS error (device loop3): open_ctree failed netlink: 28 bytes leftover after parsing attributes in process `syz-executor.5'. jfs: Unrecognized mount option "obj_role=/dev/loop-control" or missing value netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. 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. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. (unnamed net_device) (uninitialized): option active_slave: mode dependency failed, not supported in mode balance-rr(0) jfs: Unrecognized mount option "umaskx00000000c" or missing value gfs2: gfs2 mount does not exist netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 44 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 44 bytes leftover after parsing attributes in process `syz-executor.5'. L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. gfs2: gfs2 mount does not exist netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 44 bytes leftover after parsing attributes in process `syz-executor.5'. IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): tunl0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): gre0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): gretap0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): erspan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): ip_vti0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): ip6_vti0: link becomes ready encrypted_key: master key parameter 'devaul000257' is invalid audit: type=1400 audit(1602976437.698:10): avc: denied { create } for pid=9172 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1 audit: type=1400 audit(1602976437.788:11): avc: denied { name_bind } for pid=9172 comm="syz-executor.5" src=20000 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 audit: type=1400 audit(1602976437.788:12): avc: denied { node_bind } for pid=9172 comm="syz-executor.5" src=20000 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:node_t:s0 tclass=dccp_socket permissive=1 device lo entered promiscuous mode team0: Device ipvlan1 failed to register rx_handler EXT4-fs (loop3): Unrecognized mount option "euid=00000000000000060928" or missing value team0: Device ipvlan1 failed to register rx_handler