Hello, syzbot found the following issue on: HEAD commit: 453f5db0619e Merge tag 'trace-v6.7-rc7' of git://git.kerne.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=172207cee80000 kernel config: https://syzkaller.appspot.com/x/.config?x=c7bcb8f62f1e2c3e dashboard link: https://syzkaller.appspot.com/bug?extid=74dce9511a59ad67a492 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=1534af31e80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1512b9a1e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1d4df4c41f20/disk-453f5db0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e858c1c82b6d/vmlinux-453f5db0.xz kernel image: https://storage.googleapis.com/syzbot-assets/39c3d125719d/bzImage-453f5db0.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/519b891d4149/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+74dce9511a59ad67a492@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] CPU: 0 PID: 6365 Comm: syz-executor145 Not tainted 6.7.0-rc7-syzkaller-00049-g453f5db0619e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:d_really_is_negative include/linux/dcache.h:467 [inline] RIP: 0010:reiserfs_xattr_jcreate_nblocks fs/reiserfs/xattr.h:79 [inline] RIP: 0010:reiserfs_xattr_set+0x2d4/0x5c0 fs/reiserfs/xattr.c:626 Code: e9 03 80 3c 11 00 0f 85 e0 02 00 00 4d 8b a4 24 a0 05 00 00 48 ba 00 00 00 00 00 fc ff df 49 8d 7c 24 68 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 cc 02 00 00 49 83 7c 24 68 00 0f 84 eb 01 00 00 RSP: 0018:ffffc9000a22f8f0 EFLAGS: 00010212 RAX: 000000000000006c RBX: ffff88805d650190 RCX: 000000000000000d RDX: dffffc0000000000 RSI: ffffffff822cd9af RDI: 0000000000000068 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000000 R13: ffff88801c4e0000 R14: ffff88805d6501b8 R15: 0000000000000036 FS: 00007fd868e9f6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd868e9fd58 CR3: 0000000079dbb000 CR4: 0000000000350ef0 Call Trace: <TASK> security_set+0x85/0xb0 fs/reiserfs/xattr_security.c:32 __vfs_setxattr+0x173/0x1d0 fs/xattr.c:201 __vfs_setxattr_noperm+0x127/0x5e0 fs/xattr.c:235 __vfs_setxattr_locked+0x17e/0x250 fs/xattr.c:296 vfs_setxattr+0x146/0x350 fs/xattr.c:322 do_setxattr+0x142/0x170 fs/xattr.c:630 setxattr+0x159/0x170 fs/xattr.c:653 __do_sys_fsetxattr fs/xattr.c:709 [inline] __se_sys_fsetxattr fs/xattr.c:698 [inline] __x64_sys_fsetxattr+0x25e/0x310 fs/xattr.c:698 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fd868f03e99 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd868e9f228 EFLAGS: 00000246 ORIG_RAX: 00000000000000be RAX: ffffffffffffffda RBX: 00007fd868f8c6d8 RCX: 00007fd868f03e99 RDX: 0000000020000400 RSI: 00000000200003c0 RDI: 0000000000000004 RBP: 00007fd868f8c6d0 R08: 0000000000000000 R09: 00007fd868e9f6c0 R10: 0000000000000002 R11: 0000000000000246 R12: 00007fd868f58073 R13: 00007fd868f5806b R14: 3404af7c435ebb98 R15: 00007ffd907624e8 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:d_really_is_negative include/linux/dcache.h:467 [inline] RIP: 0010:reiserfs_xattr_jcreate_nblocks fs/reiserfs/xattr.h:79 [inline] RIP: 0010:reiserfs_xattr_set+0x2d4/0x5c0 fs/reiserfs/xattr.c:626 Code: e9 03 80 3c 11 00 0f 85 e0 02 00 00 4d 8b a4 24 a0 05 00 00 48 ba 00 00 00 00 00 fc ff df 49 8d 7c 24 68 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 cc 02 00 00 49 83 7c 24 68 00 0f 84 eb 01 00 00 RSP: 0018:ffffc9000a22f8f0 EFLAGS: 00010212 RAX: 000000000000006c RBX: ffff88805d650190 RCX: 000000000000000d RDX: dffffc0000000000 RSI: ffffffff822cd9af RDI: 0000000000000068 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000000 R13: ffff88801c4e0000 R14: ffff88805d6501b8 R15: 0000000000000036 FS: 00007fd868e9f6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd860e9f000 CR3: 0000000079dbb000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1) 4: 0f 85 e0 02 00 00 jne 0x2ea a: 4d 8b a4 24 a0 05 00 mov 0x5a0(%r12),%r12 11: 00 12: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 19: fc ff df 1c: 49 8d 7c 24 68 lea 0x68(%r12),%rdi 21: 48 89 f9 mov %rdi,%rcx 24: 48 c1 e9 03 shr $0x3,%rcx * 28: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1) <-- trapping instruction 2c: 0f 85 cc 02 00 00 jne 0x2fe 32: 49 83 7c 24 68 00 cmpq $0x0,0x68(%r12) 38: 0f 84 eb 01 00 00 je 0x229 --- 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 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
