program: r0 = memfd_create(&(0x7f0000000000)='syzkaller\x00', 0x0) ftruncate(r0, 0x10000) pwrite64(r0, &(0x7f0000001000)='\b\x00\x00\x00\n\x00\x00\x00\v\x00\x00\x00\f\x00'/24, 0x18, 0x2008) pwrite64(r0, &(0x7f0000001020)="80000000800000000100000000100000000400000400000005000000", 0x1c, 0x2024) pwrite64(r0, &(0x7f0000001040)="00f0ffff00fcffff0c0000000a00000000000000000000000200000001000000", 0x20, 0x2048) pwrite64(r0, &(0x7f0000001060)="00080000000000000000000000040000200000000200000000000000", 0x1c, 0x2068) pwrite64(r0, &(0x7f000000107c)="389d267c", 0x4, 0x2084) pwrite64(r0, &(0x7f0000001080)="0100000000000000", 0x8, 0x2088) pwrite64(r0, &(0x7f0000001090)="0d000000000400000004000001000000010000000100000001000000010000008000000080000000", 0x28, 0x2098) pwrite64(r0, &(0x7f00000010c0)="01000000640000006400000064000000", 0x10, 0x20c0) pwrite64(r0, &(0x7f00000010d0)="01010101010101010101010101010101", 0x10, 0x20cc) pwrite64(r0, &(0x7f00000011b0)="389d267c389d267c389d267c389d267c389d267c389d267c389d267c389d267c389d267c389d267c", 0x28, 0x24d8) pwrite64(r0, &(0x7f00000010e0)="5419010054190100541901005419010054190100", 0x14, 0x2554) pwrite64(r0, &(0x7f0000001160)="ed410200", 0x4, 0x2d00) r1 = syz_open_dev$loop(&(0x7f0000002000), 0x0, 0x2) ioctl$LOOP_SET_FD(r1, 0x4c00, r0) close(r1) mkdirat(0xffffffffffffff9c, &(0x7f0000003000)='./mnt\x00', 0x1ff) mount(&(0x7f0000000040)=@loop={'/dev/loop', 0x0}, &(0x7f0000003000)='./mnt\x00', &(0x7f0000004000)='ufs\x00', 0x0, &(0x7f0000005000)='ufstype=44bsd\x00') [ 85.581286][ T5331] loop0: detected capacity change from 0 to 128 [ 85.636628][ T5331] Oops: general protection fault, probably for non-canonical address 0xdffffc000000003c: 0000 [#1] SMP KASAN NOPTI [ 85.641497][ T5331] KASAN: null-ptr-deref in range [0x00000000000001e0-0x00000000000001e7] [ 85.644967][ T5331] CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 85.648773][ T5331] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 85.652976][ T5331] RIP: 0010:__mutex_lock+0x149/0x1550 [ 85.655381][ T5331] Code: c0 80 55 79 9a 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 35 12 00 00 83 3d 75 95 a4 0e 00 75 22 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <80> 3c 18 00 74 05 e8 3c 95 61 f6 4d 39 64 24 58 0f 85 48 11 00 00 [ 85.663255][ T5331] RSP: 0018:ffffc9000e277900 EFLAGS: 00010206 [ 85.665860][ T5331] RAX: 000000000000003c RBX: dffffc0000000000 RCX: ffffffff9a795503 [ 85.669203][ T5331] RDX: 0000000000000000 RSI: ffffffff8e4b7412 RDI: 00000000000001e0 [ 85.672523][ T5331] RBP: ffffc9000e277a98 R08: ffffc9000e277a07 R09: 0000000000000000 [ 85.675805][ T5331] R10: ffffc9000e2779e0 R11: fffff52001c4ef41 R12: 0000000000000188 [ 85.679102][ T5331] R13: 0000000000000000 R14: 1ffff92001c4ef34 R15: 0000000000000000 [ 85.682345][ T5331] FS: 00007f196f5f56c0(0000) GS:ffff88808c540000(0000) knlGS:0000000000000000 [ 85.685878][ T5331] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.688616][ T5331] CR2: 00007f7f31143000 CR3: 0000000012f73000 CR4: 0000000000352ef0 [ 85.691891][ T5331] Call Trace: [ 85.693338][ T5331] [ 85.694549][ T5331] ? do_raw_spin_lock+0x12b/0x2f0 [ 85.696588][ T5331] ? ufs_sync_fs+0x59/0x780 [ 85.698466][ T5331] ? __pfx___mutex_lock+0x10/0x10 [ 85.700541][ T5331] ? __writeback_inodes_sb_nr+0x24c/0x2c0 [ 85.702833][ T5331] ? __pfx___writeback_inodes_sb_nr+0x10/0x10 [ 85.705322][ T5331] ufs_sync_fs+0x59/0x780 [ 85.707107][ T5331] sync_filesystem+0xee/0x230 [ 85.709059][ T5331] generic_shutdown_super+0x77/0x2d0 [ 85.711241][ T5331] kill_block_super+0x44/0x90 [ 85.713133][ T5331] deactivate_locked_super+0xbc/0x130 [ 85.715328][ T5331] get_tree_bdev_flags+0x44e/0x4f0 [ 85.717457][ T5331] ? __pfx_ufs_fill_super+0x10/0x10 [ 85.719562][ T5331] ? __pfx_get_tree_bdev_flags+0x10/0x10 [ 85.721810][ T5331] vfs_get_tree+0x92/0x2a0 [ 85.723628][ T5331] do_new_mount+0x319/0xdc0 [ 85.725479][ T5331] ? __pfx_do_new_mount+0x10/0x10 [ 85.727532][ T5331] ? ns_capable+0x89/0xe0 [ 85.729344][ T5331] ? path_mount+0x647/0x1040 [ 85.731270][ T5331] ? user_path_at+0xd4/0x160 [ 85.733210][ T5331] __se_sys_mount+0x31d/0x420 [ 85.735115][ T5331] ? __pfx___se_sys_mount+0x10/0x10 [ 85.737259][ T5331] ? __x64_sys_mount+0x20/0xc0 [ 85.739293][ T5331] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.741832][ T5331] do_syscall_64+0x174/0x580 [ 85.743778][ T5331] ? trace_irq_disable+0x3b/0x140 [ 85.745882][ T5331] ? clear_bhb_loop+0x40/0x90 [ 85.747898][ T5331] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.750346][ T5331] RIP: 0033:0x7f197319e019 [ 85.752202][ T5331] 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 [ 85.759211][ T5331] RSP: 002b:00007f196f5f4fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 85.761882][ T5331] RAX: ffffffffffffffda RBX: 00007f1973425fa0 RCX: 00007f197319e019 [ 85.764859][ T5331] RDX: 0000200000004000 RSI: 0000200000003000 RDI: 0000200000000040 [ 85.768089][ T5331] RBP: 00007f197323500c R08: 0000200000005000 R09: 0000000000000000 [ 85.771292][ T5331] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 85.774484][ T5331] R13: 00007f1973426038 R14: 00007f1973425fa0 R15: 00007ffc12cab578 [ 85.777690][ T5331] [ 85.778966][ T5331] Modules linked in: [ 85.781127][ T5331] ---[ end trace 0000000000000000 ]--- [ 85.818201][ T5331] RIP: 0010:__mutex_lock+0x149/0x1550 [ 85.821118][ T5331] Code: c0 80 55 79 9a 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 35 12 00 00 83 3d 75 95 a4 0e 00 75 22 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <80> 3c 18 00 74 05 e8 3c 95 61 f6 4d 39 64 24 58 0f 85 48 11 00 00 [ 85.828968][ T5331] RSP: 0018:ffffc9000e277900 EFLAGS: 00010206 [ 85.832506][ T5331] RAX: 000000000000003c RBX: dffffc0000000000 RCX: ffffffff9a795503 [ 85.836468][ T5331] RDX: 0000000000000000 RSI: ffffffff8e4b7412 RDI: 00000000000001e0 [ 85.840763][ T5331] RBP: ffffc9000e277a98 R08: ffffc9000e277a07 R09: 0000000000000000 [ 85.844681][ T5331] R10: ffffc9000e2779e0 R11: fffff52001c4ef41 R12: 0000000000000188 [ 85.848230][ T5331] R13: 0000000000000000 R14: 1ffff92001c4ef34 R15: 0000000000000000 [ 85.856700][ T5331] FS: 00007f196f5f56c0(0000) GS:ffff88808c540000(0000) knlGS:0000000000000000 [ 85.861334][ T5331] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.864158][ T5331] CR2: 00007f7f30b15930 CR3: 0000000012f73000 CR4: 0000000000352ef0 [ 85.867526][ T5331] Kernel panic - not syncing: Fatal exception [ 85.870633][ T5331] Kernel Offset: disabled [ 85.872435][ T5331] Rebooting in 86400 seconds..