audit: type=1800 audit(1603267672.775:218): pid=21359 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.5" name="cgroup.controllers" dev="loop5" ino=385 res=0 ================================================================================ 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: 21388 Comm: syz-executor.3 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 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:00007ff5b0c13c78 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: 00007ffd57359acf R14: 00007ff5b0c149c0 R15: 000000000118bf2c ================================================================================ REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" audit: type=1800 audit(1603267673.245:219): pid=21369 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="cgroup.controllers" dev="loop4" ino=386 res=0 REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" FAT-fs (loop5): Unrecognized mount option "msdos" or missing value REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" FAT-fs (loop5): Unrecognized mount option "msdos" or missing value REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" audit: type=1800 audit(1603267675.175:220): pid=21577 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.5" name="cgroup.controllers" dev="loop5" ino=390 res=0 REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" audit: type=1800 audit(1603267675.875:221): pid=21620 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.5" name="cgroup.controllers" dev="loop5" ino=392 res=0 REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" FAT-fs (loop4): invalid media value (0x17) FAT-fs (loop4): Can't find a valid FAT filesystem REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" FAT-fs (loop4): Unrecognized mount option " " or missing value REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" FAT-fs (loop5): Unrecognized mount option "0xffffffffffffffffQʪ7H`&Yn я" or missing value REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" audit: type=1800 audit(1603267677.815:222): pid=21767 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="cgroup.controllers" dev="loop4" ino=394 res=0 FAT-fs (loop5): Unrecognized mount option "0xffffffffffffffffQʪ7H`&Yn я" or missing value REISERFS warning (device loop0): super-6502 reiserfs_getopt: unknown mount option "" audit: type=1800 audit(1603267678.455:223): pid=21797 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="cgroup.controllers" dev="loop4" ino=395 res=0