Hello, syzbot found the following issue on: HEAD commit: 33e65b1f975c Add linux-next specific files for 20210819 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1546c341300000 kernel config: https://syzkaller.appspot.com/x/.config?x=3022de5bd1dbc8f5 dashboard link: https://syzkaller.appspot.com/bug?extid=e8bafe7b82c739eaf153 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15767d41300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13582731300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e8bafe7b82c739eaf153@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================================ UBSAN: array-index-out-of-bounds in security/integrity/ima/ima_appraise.c:621:36 index 222 is out of range for type 'char *[20]' CPU: 1 PID: 6550 Comm: syz-executor680 Not tainted 5.14.0-rc6-next-20210819-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 ubsan_epilogue+0xb/0x5a lib/ubsan.c:151 __ubsan_handle_out_of_bounds.cold+0x64/0x70 lib/ubsan.c:291 validate_hash_algo security/integrity/ima/ima_appraise.c:621 [inline] ima_inode_setxattr+0x536/0x540 security/integrity/ima/ima_appraise.c:656 security_inode_setxattr+0x148/0x240 security/security.c:1355 __vfs_setxattr_locked+0xa7/0x260 fs/xattr.c:266 vfs_setxattr+0x14e/0x350 fs/xattr.c:301 setxattr+0x21b/0x2b0 fs/xattr.c:575 path_setxattr+0x19d/0x1d0 fs/xattr.c:595 __do_sys_lsetxattr fs/xattr.c:618 [inline] __se_sys_lsetxattr fs/xattr.c:614 [inline] __x64_sys_lsetxattr+0xbd/0x150 fs/xattr.c:614 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x43ee89 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe96b06768 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee89 RDX: 0000000020000140 RSI: 00000000200000c0 RDI: 0000000020000000 RBP: 0000000000402e70 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000000a R11: 0000000000000246 R12: 0000000000402f00 R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 ================================================================================ ---------------- Code disassembly (best guess): 0: 28 c3 sub %al,%bl 2: e8 2a 14 00 00 callq 0x1431 7: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) e: 00 00 00 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall 2a: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 retq 33: 48 c7 c1 c0 ff ff ff mov $0xffffffffffffffc0,%rcx 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
