Hello, syzbot found the following issue on: HEAD commit: 28f20a19294d Merge tag 'x86-urgent-2023-08-26' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=153271dfa80000 kernel config: https://syzkaller.appspot.com/x/.config?x=1e4a882f77ed77bd dashboard link: https://syzkaller.appspot.com/bug?extid=f5b965c58efb9c510227 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16aab870680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=175a687ba80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6b7215a1c9ca/disk-28f20a19.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c5935df3c66a/vmlinux-28f20a19.xz kernel image: https://storage.googleapis.com/syzbot-assets/3974ee7fd77d/bzImage-28f20a19.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/4d843a4575f5/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f5b965c58efb9c510227@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xeeb017db1ffff112: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x7580ded8ffff8890-0x7580ded8ffff8897] CPU: 0 PID: 5055 Comm: syz-executor397 Not tainted 6.5.0-rc7-syzkaller-00185-g28f20a19294d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:do_inode_permission fs/namei.c:460 [inline] RIP: 0010:inode_permission fs/namei.c:528 [inline] RIP: 0010:inode_permission+0x35d/0x5e0 fs/namei.c:503 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5d 02 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 73 20 49 8d 7e 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 30 02 00 00 4d 8b 76 10 4d 85 f6 0f 84 ab 01 00 RSP: 0000:ffffc90003caf5a0 EFLAGS: 00010216 RAX: dffffc0000000000 RBX: ffff88807580dcb0 RCX: 0000000000000000 RDX: 0eb01bdb1ffff112 RSI: ffffffff81ec15b5 RDI: 7580ded8ffff8890 RBP: 0000000000000081 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8cb84420 R13: 0000000000000000 R14: 7580ded8ffff8880 R15: ffff88807580dcb2 FS: 0000555555f8d3c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffc7 CR3: 000000002a981000 CR4: 0000000000350ef0 Call Trace: <TASK> may_lookup fs/namei.c:1716 [inline] link_path_walk.part.0.constprop.0+0x26f/0xce0 fs/namei.c:2267 link_path_walk fs/namei.c:2250 [inline] path_parentat+0xaa/0x1b0 fs/namei.c:2526 __filename_parentat+0x1f2/0x640 fs/namei.c:2550 filename_parentat fs/namei.c:2568 [inline] do_unlinkat+0x109/0x6d0 fs/namei.c:4368 do_coredump+0x18bd/0x3fc0 fs/coredump.c:675 get_signal+0x2464/0x2770 kernel/signal.c:2867 arch_do_signal_or_restart+0x89/0x5f0 arch/x86/kernel/signal.c:308 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f96f653c143 Code: e8 46 45 00 00 66 0f 1f 44 00 00 48 83 ec 08 48 89 fa 48 89 f1 31 ff 31 f6 e8 4d 01 03 00 85 c0 75 09 48 83 c4 08 c3 0f 1f 40 <00> 48 c7 c2 b0 ff ff ff 64 89 02 b8 ff ff ff ff eb e6 66 2e 0f 1f RSP: 002b:00007ffc5e7c7220 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 000000000006cd02 RCX: 00007f96f656c2b3 RDX: 00007ffc5e7c7230 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000066 R08: 00000000000001be R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc5e7c7300 R13: 0000000000000025 R14: 431bde82d7b634db R15: 00007ffc5e7c7284 </TASK> Modules linked in: ---------------- Code disassembly (best guess): 0: 48 89 fa mov %rdi,%rdx 3: 48 c1 ea 03 shr $0x3,%rdx 7: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) b: 0f 85 5d 02 00 00 jne 0x26e 11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 18: fc ff df 1b: 4c 8b 73 20 mov 0x20(%rbx),%r14 1f: 49 8d 7e 10 lea 0x10(%r14),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 30 02 00 00 jne 0x264 34: 4d 8b 76 10 mov 0x10(%r14),%r14 38: 4d 85 f6 test %r14,%r14 3b: 0f .byte 0xf 3c: 84 .byte 0x84 3d: ab stos %eax,%es:(%rdi) 3e: 01 00 add %eax,(%rax) --- 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. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
