Hello, syzbot found the following issue on: HEAD commit: b97d64c72259 Merge tag '6.6-rc-smb3-client-fixes-part1' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14b1212fa80000 kernel config: https://syzkaller.appspot.com/x/.config?x=958c1fdc38118172 dashboard link: https://syzkaller.appspot.com/bug?extid=1f1de29389f950944703 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/99875b49c50b/disk-b97d64c7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5bcacc1a3f5b/vmlinux-b97d64c7.xz kernel image: https://storage.googleapis.com/syzbot-assets/e2fe9c8de38a/bzImage-b97d64c7.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1f1de29389f950944703@xxxxxxxxxxxxxxxxxxxxxxxxx loop3: detected capacity change from 0 to 1024 BUG: unable to handle page fault for address: 000000078ccae8f8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 83d20067 P4D 83d20067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 31278 Comm: syz-executor.3 Not tainted 6.5.0-syzkaller-08894-gb97d64c72259 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:__raw_callee_save___kvm_vcpu_is_preempted+0x4/0x20 Code: 21 10 01 c0 be 03 00 00 00 e8 c8 ea 36 03 bf 21 10 01 c0 be 0e 00 00 00 e9 b9 ea 36 03 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa <48> 8b 04 fd 00 e9 ca 8c 80 b8 d0 83 02 00 00 0f 95 c0 c3 66 0f 1f RSP: 0018:ffffc90015d2f560 EFLAGS: 00010286 RAX: 1ffffffff1a3373f RBX: ffff888030204028 RCX: ffffffff816ba91d RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff RBP: 00000000ffffffff R08: ffff88803020402f R09: 1ffff11006040805 R10: dffffc0000000000 R11: ffffed1006040806 R12: ffff88802b268014 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f5de3a856c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000078ccae8f8 CR3: 000000002f2a1000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> pv_vcpu_is_preempted arch/x86/include/asm/paravirt.h:608 [inline] vcpu_is_preempted arch/x86/include/asm/qspinlock.h:63 [inline] owner_on_cpu include/linux/sched.h:2306 [inline] mutex_can_spin_on_owner kernel/locking/mutex.c:409 [inline] mutex_optimistic_spin+0x17b/0x2b0 kernel/locking/mutex.c:452 __mutex_lock_common+0x20a/0x2530 kernel/locking/mutex.c:607 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_lookup+0x162/0x580 fs/reiserfs/namei.c:364 lookup_open fs/namei.c:3473 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0x11f1/0x3180 fs/namei.c:3793 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_open fs/open.c:1445 [inline] __se_sys_open fs/open.c:1441 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1441 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5de2c7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007f5de3a850c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f5de2d9bf80 RCX: 00007f5de2c7cae9 RDX: 0000000000000000 RSI: 0000000000145142 RDI: 0000000020007f80 RBP: 00007f5de2cc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f5de2d9bf80 R15: 00007ffcdd81fee8 </TASK> Modules linked in: CR2: 000000078ccae8f8 ---[ end trace 0000000000000000 ]--- RIP: 0010:__raw_callee_save___kvm_vcpu_is_preempted+0x4/0x20 Code: 21 10 01 c0 be 03 00 00 00 e8 c8 ea 36 03 bf 21 10 01 c0 be 0e 00 00 00 e9 b9 ea 36 03 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa <48> 8b 04 fd 00 e9 ca 8c 80 b8 d0 83 02 00 00 0f 95 c0 c3 66 0f 1f RSP: 0018:ffffc90015d2f560 EFLAGS: 00010286 RAX: 1ffffffff1a3373f RBX: ffff888030204028 RCX: ffffffff816ba91d RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff RBP: 00000000ffffffff R08: ffff88803020402f R09: 1ffff11006040805 R10: dffffc0000000000 R11: ffffed1006040806 R12: ffff88802b268014 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f5de3a856c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000078ccae8f8 CR3: 000000002f2a1000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 21 10 and %edx,(%rax) 2: 01 c0 add %eax,%eax 4: be 03 00 00 00 mov $0x3,%esi 9: e8 c8 ea 36 03 call 0x336ead6 e: bf 21 10 01 c0 mov $0xc0011021,%edi 13: be 0e 00 00 00 mov $0xe,%esi 18: e9 b9 ea 36 03 jmp 0x336ead6 1d: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 24: 00 00 26: f3 0f 1e fa endbr64 * 2a: 48 8b 04 fd 00 e9 ca mov -0x73351700(,%rdi,8),%rax <-- trapping instruction 31: 8c 32: 80 b8 d0 83 02 00 00 cmpb $0x0,0x283d0(%rax) 39: 0f 95 c0 setne %al 3c: c3 ret 3d: 66 data16 3e: 0f .byte 0xf 3f: 1f (bad) --- 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 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
