loop0: detected capacity change from 0 to 32768 ERROR: (device loop0): xtSearch: XT_GETPAGE: xtree page corrupt ERROR: (device loop0): remounting filesystem as read-only BUG: unable to handle page fault for address: ffffffff9f3b37f0 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD df3d067 P4D df3d067 PUD df3e063 PMD 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5348 Comm: syz.0.0 Not tainted 6.16.0-rc2-syzkaller-00024-g9afe652958c3 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:227 [inline] RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline] RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline] RIP: 0010:__lock_acquire+0x6c1/0xd20 kernel/locking/lockdep.c:5210 Code: b3 00 00 00 4c 89 f6 ba 08 00 00 00 e8 88 25 00 00 45 31 ff 85 c0 0f 84 f5 05 00 00 83 3d f6 06 0a 18 00 75 13 48 63 44 24 20 <48> 0f a3 05 87 77 06 12 0f 83 15 05 00 00 31 ed 48 8b 3c 24 4c 8b RSP: 0018:ffffc9000d397270 EFLAGS: 00010046 RAX: 000000005cb421aa RBX: 0000000000000004 RCX: ffffffff93470000 RDX: 0000000000000008 RSI: ffff888000a7afd0 RDI: ffff888000a7a440 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff819b7a2f R10: dffffc0000000000 R11: fffffbfff1f421bf R12: 0000000000000004 R13: 0000000000000004 R14: ffff888000a7afd0 R15: 0000000000000000 FS: 00007fb5f95fd6c0(0000) GS:ffff88808d251000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff9f3b37f0 CR3: 000000004427d000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 __wake_up_common_lock+0x2f/0x1f0 kernel/sched/wait.c:105 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline] release_metapage+0x13c/0xac0 fs/jfs/jfs_metapage.c:869 xtTruncate+0xe71/0x2dd0 fs/jfs/jfs_xtree.c:-1 jfs_truncate_nolock+0x2a7/0x340 fs/jfs/inode.c:373 jfs_truncate fs/jfs/inode.c:412 [inline] jfs_write_failed+0x119/0x190 fs/jfs/inode.c:289 jfs_write_begin+0x6f/0x80 fs/jfs/inode.c:301 generic_perform_write+0x2c4/0x910 mm/filemap.c:4112 generic_file_write_iter+0x10f/0x540 mm/filemap.c:4255 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x548/0xa90 fs/read_write.c:686 ksys_write+0x145/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb5f878e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb5f95fd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb5f89b5fa0 RCX: 00007fb5f878e929 RDX: 0000000000001006 RSI: 0000200000002100 RDI: 0000000000000004 RBP: 00007fb5f8810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb5f89b5fa0 R15: 00007ffea2d7aa98 Modules linked in: CR2: ffffffff9f3b37f0 ---[ end trace 0000000000000000 ]--- RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:227 [inline] RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline] RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline] RIP: 0010:__lock_acquire+0x6c1/0xd20 kernel/locking/lockdep.c:5210 Code: b3 00 00 00 4c 89 f6 ba 08 00 00 00 e8 88 25 00 00 45 31 ff 85 c0 0f 84 f5 05 00 00 83 3d f6 06 0a 18 00 75 13 48 63 44 24 20 <48> 0f a3 05 87 77 06 12 0f 83 15 05 00 00 31 ed 48 8b 3c 24 4c 8b RSP: 0018:ffffc9000d397270 EFLAGS: 00010046 RAX: 000000005cb421aa RBX: 0000000000000004 RCX: ffffffff93470000 RDX: 0000000000000008 RSI: ffff888000a7afd0 RDI: ffff888000a7a440 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff819b7a2f R10: dffffc0000000000 R11: fffffbfff1f421bf R12: 0000000000000004 R13: 0000000000000004 R14: ffff888000a7afd0 R15: 0000000000000000 FS: 00007fb5f95fd6c0(0000) GS:ffff88808d251000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff9f3b37f0 CR3: 000000004427d000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: b3 00 mov $0x0,%bl 2: 00 00 add %al,(%rax) 4: 4c 89 f6 mov %r14,%rsi 7: ba 08 00 00 00 mov $0x8,%edx c: e8 88 25 00 00 call 0x2599 11: 45 31 ff xor %r15d,%r15d 14: 85 c0 test %eax,%eax 16: 0f 84 f5 05 00 00 je 0x611 1c: 83 3d f6 06 0a 18 00 cmpl $0x0,0x180a06f6(%rip) # 0x180a0719 23: 75 13 jne 0x38 25: 48 63 44 24 20 movslq 0x20(%rsp),%rax * 2a: 48 0f a3 05 87 77 06 bt %rax,0x12067787(%rip) # 0x120677b9 <-- trapping instruction 31: 12 32: 0f 83 15 05 00 00 jae 0x54d 38: 31 ed xor %ebp,%ebp 3a: 48 8b 3c 24 mov (%rsp),%rdi 3e: 4c rex.WR 3f: 8b .byte 0x8b