loop5: detected capacity change from 0 to 1024 BUG: unable to handle page fault for address: 000000078ccb8938 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 463a6067 P4D 463a6067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 21530 Comm: syz-executor.5 Not tainted 6.5.0-syzkaller-11329-g708283abf896 #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 78 08 38 03 bf 21 10 01 c0 be 0e 00 00 00 e9 69 08 38 03 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa <48> 8b 04 fd 40 89 cb 8c 80 b8 d0 83 02 00 00 0f 95 c0 c3 66 0f 1f RSP: 0018:ffffc9000407f7c0 EFLAGS: 00010286 RAX: 1ffffffff1a33707 RBX: ffff88807a8f8828 RCX: ffffffff816be6fd RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff RBP: 00000000ffffffff R08: ffff88807a8f882f R09: 1ffff1100f51f105 R10: dffffc0000000000 R11: ffffed100f51f106 R12: ffff888078e52014 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f54179a86c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000078ccb8938 CR3: 0000000078301000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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:2316 [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_readdir_inode+0x181/0x14c0 fs/reiserfs/dir.c:79 iterate_dir+0x1cd/0x580 fs/readdir.c:106 __do_sys_getdents64 fs/readdir.c:405 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:390 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: 0033:0x7f5416c7cae9 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:00007f54179a80c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007f5416d9bf80 RCX: 00007f5416c7cae9 RDX: 00000000000000b1 RSI: 0000000020000640 RDI: 0000000000000003 RBP: 00007f5416cc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f5416d9bf80 R15: 00007ffe1e9cc168 Modules linked in: CR2: 000000078ccb8938 ---[ 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 78 08 38 03 bf 21 10 01 c0 be 0e 00 00 00 e9 69 08 38 03 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa <48> 8b 04 fd 40 89 cb 8c 80 b8 d0 83 02 00 00 0f 95 c0 c3 66 0f 1f RSP: 0018:ffffc9000407f7c0 EFLAGS: 00010286 RAX: 1ffffffff1a33707 RBX: ffff88807a8f8828 RCX: ffffffff816be6fd RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff RBP: 00000000ffffffff R08: ffff88807a8f882f R09: 1ffff1100f51f105 R10: dffffc0000000000 R11: ffffed100f51f106 R12: ffff888078e52014 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f54179a86c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000078ccb8938 CR3: 0000000078301000 CR4: 00000000003506e0 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 78 08 38 03 call 0x3380886 e: bf 21 10 01 c0 mov $0xc0011021,%edi 13: be 0e 00 00 00 mov $0xe,%esi 18: e9 69 08 38 03 jmp 0x3380886 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 40 89 cb mov -0x733476c0(,%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)