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AJvYcCV4yBXWGKQckpKbgVjDVPdCeXFMkxYWR/b42TX4w9csRChPzgusWS8DVa8U2papV3B9P9LdHnJFT9HMyUk=@vger.kernel.org X-Gm-Message-State: AOJu0YzQyA1pPSudR5Nk1ZY0c6jYOFEUgf/8PAEG6QG/WeJVigXQkver sAnmsbDwnqE9VTgQhs1DQIy8sFizsiWQnxYHSVljR8icSYZ7gxeVOqDqKHRLmwqZL80+1vZo78x OLUcFLhlQLjYqv5QO+LoHz5F1bVHT9iiXRXfVV218D8zlAWqVIwSfUISEmDs= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2297:b0:677:fc0b:dd with SMTP id 006d021491bc7-67b9bcaa786mr1047763eaf.29.1772790361941; Fri, 06 Mar 2026 01:46:01 -0800 (PST) Date: Fri, 06 Mar 2026 01:46:01 -0800 In-Reply-To: <20260306091613.19545-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69aaa259.050a0220.13f275.0017.GAE@google.com> Subject: Re: [syzbot] [exfat?] [gfs2?] WARNING in filename_symlinkat From: syzbot To: kartikey406@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in filename_symlinkat ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888046d2c318, owner = 0x0, curr 0xffff88801ccac980, list empty WARNING: kernel/locking/rwsem.c:1381 at __up_write kernel/locking/rwsem.c:1380 [inline], CPU#0: syz.0.143/6943 WARNING: kernel/locking/rwsem.c:1381 at up_write+0x2d6/0x410 kernel/locking/rwsem.c:1643, CPU#0: syz.0.143/6943 Modules linked in: CPU: 0 UID: 0 PID: 6943 Comm: syz.0.143 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:__up_write kernel/locking/rwsem.c:1380 [inline] RIP: 0010:up_write+0x388/0x410 kernel/locking/rwsem.c:1643 Code: cc 8b 49 c7 c2 80 eb cc 8b 4c 0f 44 d0 48 8b 7c 24 08 48 c7 c6 e0 ed cc 8b 48 8b 14 24 4c 89 f1 4d 89 e0 4c 8b 4c 24 10 41 52 <67> 48 0f b9 3a 48 83 c4 08 e8 da a5 0b 03 e9 67 fd ff ff 48 c7 c1 RSP: 0018:ffffc9000ec17d80 EFLAGS: 00010246 RAX: ffffffff8bcceb60 RBX: ffff888046d2c318 RCX: ffff888046d2c318 RDX: 0000000000000000 RSI: ffffffff8bccede0 RDI: ffffffff901509e0 RBP: ffff888046d2c370 R08: 0000000000000000 R09: ffff88801ccac980 R10: ffffffff8bcceb60 R11: ffffed1008da5865 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888046d2c318 R15: 1ffff11008da5864 FS: 00007f4c4ac2e6c0(0000) GS:ffff88808ca56000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4c49de9e80 CR3: 0000000044482000 CR4: 0000000000352ef0 Call Trace: inode_unlock include/linux/fs.h:1038 [inline] end_creating_path fs/namei.c:4976 [inline] filename_symlinkat+0x314/0x570 fs/namei.c:5668 __do_sys_symlinkat fs/namei.c:5686 [inline] __se_sys_symlinkat+0x4e/0x2b0 fs/namei.c:5681 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4c49d9c799 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:00007f4c4ac2e028 EFLAGS: 00000246 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 00007f4c4a016090 RCX: 00007f4c49d9c799 RDX: 00002000000003c0 RSI: 0000000000000007 RDI: 0000200000000240 RBP: 00007f4c49e32bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4c4a016128 R14: 00007f4c4a016090 R15: 00007ffe3dc10f28 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 49 c7 c2 80 eb cc 8b mov $0xffffffff8bcceb80,%r10 7: 4c 0f 44 d0 cmove %rax,%r10 b: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi 10: 48 c7 c6 e0 ed cc 8b mov $0xffffffff8bccede0,%rsi 17: 48 8b 14 24 mov (%rsp),%rdx 1b: 4c 89 f1 mov %r14,%rcx 1e: 4d 89 e0 mov %r12,%r8 21: 4c 8b 4c 24 10 mov 0x10(%rsp),%r9 26: 41 52 push %r10 * 28: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2d: 48 83 c4 08 add $0x8,%rsp 31: e8 da a5 0b 03 call 0x30ba610 36: e9 67 fd ff ff jmp 0xfffffda2 3b: 48 rex.W 3c: c7 .byte 0xc7 3d: c1 .byte 0xc1 Tested on: commit: 5ee8dbf5 Merge tag 'fsverity-for-linus' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11465b5a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c5c49ee0942d1cdb dashboard link: https://syzkaller.appspot.com/bug?extid=2ed46b6b748df855347f compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=10264a02580000