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2002:a05:6808:1792:b0:497:d252:d609 with SMTP id 5614622812f47-4af5dfb8079mr1528242b6e.4.1785518070781; Fri, 31 Jul 2026 10:14:30 -0700 (PDT) Date: Fri, 31 Jul 2026 10:14:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6cd7f6.2d659fcc.1d46f5.0199.GAE@google.com> Subject: [syzbot] [fs?] general protection fault in path_put From: syzbot To: brauner@kernel.org, jack@suse.cz, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 11028ab62899 Merge tag 'probes-fixes-v7.2-rc5' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=179d4aea580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=1686d17ae576cc5f8a57 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14e497b1580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14e2a48e580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-11028ab6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e2be78614a29/vmlinux-11028ab6.xz kernel image: https://storage.googleapis.com/syzbot-assets/301a11d315af/bzImage-11028ab6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1686d17ae576cc5f8a57@syzkaller.appspotmail.com RBP: 00007fffaa9085c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007feae0225fac R14: 00007feae0225fa0 R15: 00007feae0225fa0 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] CPU: 0 UID: 0 PID: 5912 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:path_put+0x22/0x70 fs/namei.c:722 Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 53 48 89 fb e8 a3 61 78 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 29 48 8b 7b 08 e8 4f 97 04 00 48 89 da 48 b8 00 00 RSP: 0018:ffffc900040c7a68 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 000000000000003c RCX: 0000000000000000 RDX: 0000000000000008 RSI: ffffffff8291fe9d RDI: 0000000000000044 RBP: ffffc900040c7bf8 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff9b74bc40 R11: 0000000000000000 R12: ffff888022ab1f88 R13: ffff88802dcb4a60 R14: ffff888022a9c680 R15: fffffffffffffff4 FS: 000055557d29f500(0000) GS:ffff8880d5ddc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32f63fff CR3: 000000003cf56000 CR4: 0000000000352ef0 Call Trace: free_trace_uprobe kernel/trace/trace_uprobe.c:374 [inline] free_trace_uprobe kernel/trace/trace_uprobe.c:369 [inline] __free_free_trace_uprobe kernel/trace/trace_uprobe.c:536 [inline] __trace_uprobe_create+0x96d/0x22f0 kernel/trace/trace_uprobe.c:545 trace_probe_create+0xef/0x100 kernel/trace/trace_probe.c:2371 dyn_event_create+0x46/0x70 kernel/trace/trace_dynevent.c:128 create_or_delete_trace_uprobe+0x5a/0xb0 kernel/trace/trace_uprobe.c:739 trace_parse_run_command+0x1ab/0x3b0 kernel/trace/trace.c:9565 vfs_write+0x2aa/0x1050 fs/read_write.c:685 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7feadff9df99 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffaa908558 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007feae0225fa0 RCX: 00007feadff9df99 RDX: 000000000000000f RSI: 0000200000000180 RDI: 0000000000000004 RBP: 00007fffaa9085c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007feae0225fac R14: 00007feae0225fa0 R15: 00007feae0225fa0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:path_put+0x22/0x70 fs/namei.c:722 Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 53 48 89 fb e8 a3 61 78 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 29 48 8b 7b 08 e8 4f 97 04 00 48 89 da 48 b8 00 00 RSP: 0018:ffffc900040c7a68 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 000000000000003c RCX: 0000000000000000 RDX: 0000000000000008 RSI: ffffffff8291fe9d RDI: 0000000000000044 RBP: ffffc900040c7bf8 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff9b74bc40 R11: 0000000000000000 R12: ffff888022ab1f88 R13: ffff88802dcb4a60 R14: ffff888022a9c680 R15: fffffffffffffff4 FS: 000055557d29f500(0000) GS:ffff8880d5edc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32f24008 CR3: 000000003cf56000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: f3 0f 1e fa endbr64 c: 53 push %rbx d: 48 89 fb mov %rdi,%rbx 10: e8 a3 61 78 ff call 0xff7861b8 15: 48 8d 7b 08 lea 0x8(%rbx),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 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: 75 29 jne 0x59 30: 48 8b 7b 08 mov 0x8(%rbx),%rdi 34: e8 4f 97 04 00 call 0x49788 39: 48 89 da mov %rbx,%rdx 3c: 48 rex.W 3d: b8 .byte 0xb8 --- 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@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, 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 report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup