================================================================================ 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: 10968 Comm: syz-executor.1 Not tainted 4.19.150-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 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:00007f8c029b3c78 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: 00007ffdff12288f R14: 00007f8c029b49c0 R15: 000000000118bf2c ================================================================================ NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device audit: type=1800 audit(1602883663.517:86): pid=11003 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="pids.current" dev="sda1" ino=16419 res=0 NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device kauditd_printk_skb: 2 callbacks suppressed audit: type=1800 audit(1602883665.517:89): pid=11123 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="pids.current" dev="sda1" ino=17105 res=0 NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. NILFS (loop3): couldn't find nilfs on the device device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state NILFS (loop3): couldn't find nilfs on the device audit: type=1800 audit(1602883666.877:90): pid=11192 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="pids.current" dev="sda1" ino=17122 res=0 NILFS (loop3): couldn't find nilfs on the device netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. NILFS (loop3): couldn't find nilfs on the device device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state audit: type=1800 audit(1602883668.507:91): pid=11266 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="pids.current" dev="sda1" ino=16148 res=0 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device audit: type=1800 audit(1602883669.957:92): pid=11323 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="pids.current" dev="sda1" ino=16144 res=0 NILFS (loop3): couldn't find nilfs on the device NILFS (loop3): couldn't find nilfs on the device 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd NILFS (loop3): couldn't find nilfs on the device audit: type=1800 audit(1602883671.177:93): pid=11385 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="pids.current" dev="sda1" ino=16132 res=0 NILFS (loop3): couldn't find nilfs on the device audit: type=1400 audit(1602883671.257:94): avc: denied { create } for pid=11407 comm="syz-executor.1" 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(1602883671.277:95): avc: denied { name_bind } for pid=11407 comm="syz-executor.1" src=20000 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 NILFS (loop3): couldn't find nilfs on the device audit: type=1400 audit(1602883671.277:96): avc: denied { node_bind } for pid=11407 comm="syz-executor.1" src=20000 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:node_t:s0 tclass=dccp_socket permissive=1 audit: type=1400 audit(1602883671.287:97): avc: denied { name_connect } for pid=11407 comm="syz-executor.1" dest=20000 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 NILFS (loop3): couldn't find nilfs on the device