program:
openat$dir(0xffffffffffffff9c, &(0x7f0000001a00)='./file1\x00', 0x40, 0x0)
r0 = syz_open_dev$ndb(&(0x7f00000000c0), 0x0, 0x80000)
r1 = socket(0x2, 0x1, 0x0)
r2 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x0)
ioctl$NBD_SET_SOCK(r0, 0xab00, r1)
ioctl$NBD_DO_IT(r2, 0xab03)
mount(&(0x7f0000000000)=@nbd={'/dev/nbd', 0x0}, &(0x7f0000004a00)='./file1\x00', &(0x7f0000000040)='qnx6\x00', 0x2008087, 0x0)
[ 149.229191][ T4670] block nbd0: Receive control failed (result -107)
[ 149.272179][ T5341] qnx6: unable to read the first superblock
[ 149.285490][ T5341] ------------[ cut here ]------------
[ 149.288072][ T5341] WARNING: CPU: 0 PID: 5341 at fs/buffer.c:1125 bdev_getblk+0x580/0x660
[ 149.292092][ T5341] Modules linked in:
[ 149.294254][ T5341] CPU: 0 UID: 0 PID: 5341 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 149.298068][ T5341] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
[ 149.303763][ T5341] RIP: 0010:bdev_getblk+0x580/0x660
[ 149.306036][ T5341] Code: 26 fb ff ff e8 71 a8 75 ff 48 c7 c7 20 29 7a 8b 48 c7 c6 77 d0 83 8d 4c 89 fa 4c 89 e9 e8 08 96 dd fe eb bd e8 51 a8 75 ff 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 41 80 3c 07 00 74 08 48 89
[ 149.313830][ T5341] RSP: 0018:ffffc90001a9f9d8 EFLAGS: 00010287
[ 149.316058][ T5341] RAX: ffffffff8249fb4f RBX: ffff888032065098 RCX: 0000000000100000
[ 149.319217][ T5341] RDX: ffffc9000f4e3000 RSI: 0000000000001620 RDI: 0000000000001621
[ 149.322703][ T5341] RBP: 0000000000000200 R08: 0000000000000000 R09: ffffffff8218eb4d
[ 149.326008][ T5341] R10: 0000000000000406 R11: 0000000000000002 R12: ffff8880320659f0
[ 149.329280][ T5341] R13: ffff888032065080 R14: 0000000000000200 R15: 1ffff1100640ca13
[ 149.332558][ T5341] FS: 00007f283922a6c0(0000) GS:ffff88808d304000(0000) knlGS:0000000000000000
[ 149.336272][ T5341] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 149.339176][ T5341] CR2: 000055e7731f7e18 CR3: 00000000127d0000 CR4: 0000000000352ef0
[ 149.342753][ T5341] Call Trace:
[ 149.344051][ T5341]
[ 149.345151][ T5341] __bread_gfp+0x89/0x3c0
[ 149.346683][ T5341] qnx6_check_first_superblock+0xa1/0x330
[ 149.348978][ T5341] ? sb_set_blocksize+0x120/0x180
[ 149.351152][ T5341] qnx6_fill_super+0x4c8/0x1280
[ 149.353290][ T5341] ? setup_bdev_super+0x4c1/0x5b0
[ 149.355246][ T5341] get_tree_bdev_flags+0x40b/0x4d0
[ 149.357302][ T5341] ? __pfx_qnx6_fill_super+0x10/0x10
[ 149.359268][ T5341] ? __pfx_get_tree_bdev_flags+0x10/0x10
[ 149.361793][ T5341] vfs_get_tree+0x8f/0x2b0
[ 149.363577][ T5341] do_new_mount+0x302/0xa10
[ 149.365460][ T5341] ? apparmor_capable+0x137/0x1b0
[ 149.367522][ T5341] ? __pfx_do_new_mount+0x10/0x10
[ 149.369684][ T5341] ? ns_capable+0x8a/0xf0
[ 149.371547][ T5341] ? kmem_cache_free+0x19b/0x690
[ 149.373586][ T5341] __se_sys_mount+0x313/0x410
[ 149.375566][ T5341] ? __pfx___se_sys_mount+0x10/0x10
[ 149.377698][ T5341] ? do_syscall_64+0xbe/0xfa0
[ 149.379782][ T5341] ? __x64_sys_mount+0x20/0xc0
[ 149.382116][ T5341] do_syscall_64+0xfa/0xfa0
[ 149.384074][ T5341] ? lockdep_hardirqs_on+0x9c/0x150
[ 149.386154][ T5341] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 149.388644][ T5341] ? clear_bhb_loop+0x60/0xb0
[ 149.390847][ T5341] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 149.393890][ T5341] RIP: 0033:0x7f283838eec9
[ 149.395655][ T5341] 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
[ 149.404072][ T5341] RSP: 002b:00007f283922a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 149.407577][ T5341] RAX: ffffffffffffffda RBX: 00007f28385e6090 RCX: 00007f283838eec9
[ 149.411123][ T5341] RDX: 0000200000000040 RSI: 0000200000004a00 RDI: 0000200000000000
[ 149.414762][ T5341] RBP: 00007f2838411f91 R08: 0000000000000000 R09: 0000000000000000
[ 149.418408][ T5341] R10: 0000000002008087 R11: 0000000000000246 R12: 0000000000000000
[ 149.421571][ T5341] R13: 00007f28385e6128 R14: 00007f28385e6090 R15: 00007fff2c3dee78
[ 149.424925][ T5341]
[ 149.426245][ T5341] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 149.429416][ T5341] CPU: 0 UID: 0 PID: 5341 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 149.433354][ T5341] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
[ 149.438123][ T5341] Call Trace:
[ 149.439559][ T5341]
[ 149.440900][ T5341] dump_stack_lvl+0x99/0x250
[ 149.442887][ T5341] ? __asan_memcpy+0x40/0x70
[ 149.444997][ T5341] ? __pfx_dump_stack_lvl+0x10/0x10
[ 149.447320][ T5341] ? __pfx__printk+0x10/0x10
[ 149.449411][ T5341] vpanic+0x237/0x6d0
[ 149.451263][ T5341] ? __pfx_vpanic+0x10/0x10
[ 149.453329][ T5341] panic+0xb9/0xc0
[ 149.455044][ T5341] ? __pfx_panic+0x10/0x10
[ 149.457087][ T5341] __warn+0x31b/0x4b0
[ 149.458897][ T5341] ? bdev_getblk+0x580/0x660
[ 149.460989][ T5341] ? bdev_getblk+0x580/0x660
[ 149.462811][ T5341] report_bug+0x2be/0x4f0
[ 149.464528][ T5341] ? bdev_getblk+0x580/0x660
[ 149.466234][ T5341] ? bdev_getblk+0x580/0x660
[ 149.468274][ T5341] ? bdev_getblk+0x582/0x660
[ 149.470243][ T5341] handle_bug+0x84/0x160
[ 149.471968][ T5341] exc_invalid_op+0x1a/0x50
[ 149.474005][ T5341] asm_exc_invalid_op+0x1a/0x20
[ 149.476048][ T5341] RIP: 0010:bdev_getblk+0x580/0x660
[ 149.478119][ T5341] Code: 26 fb ff ff e8 71 a8 75 ff 48 c7 c7 20 29 7a 8b 48 c7 c6 77 d0 83 8d 4c 89 fa 4c 89 e9 e8 08 96 dd fe eb bd e8 51 a8 75 ff 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 41 80 3c 07 00 74 08 48 89
[ 149.485124][ T5341] RSP: 0018:ffffc90001a9f9d8 EFLAGS: 00010287
[ 149.487592][ T5341] RAX: ffffffff8249fb4f RBX: ffff888032065098 RCX: 0000000000100000
[ 149.491044][ T5341] RDX: ffffc9000f4e3000 RSI: 0000000000001620 RDI: 0000000000001621
[ 149.494376][ T5341] RBP: 0000000000000200 R08: 0000000000000000 R09: ffffffff8218eb4d
[ 149.497789][ T5341] R10: 0000000000000406 R11: 0000000000000002 R12: ffff8880320659f0
[ 149.501204][ T5341] R13: ffff888032065080 R14: 0000000000000200 R15: 1ffff1100640ca13
[ 149.504617][ T5341] ? fs_reclaim_acquire+0x7d/0x100
[ 149.506868][ T5341] ? bdev_getblk+0x57f/0x660
[ 149.508859][ T5341] ? bdev_getblk+0x57f/0x660
[ 149.510774][ T5341] __bread_gfp+0x89/0x3c0
[ 149.512668][ T5341] qnx6_check_first_superblock+0xa1/0x330
[ 149.515187][ T5341] ? sb_set_blocksize+0x120/0x180
[ 149.517378][ T5341] qnx6_fill_super+0x4c8/0x1280
[ 149.519380][ T5341] ? setup_bdev_super+0x4c1/0x5b0
[ 149.521535][ T5341] get_tree_bdev_flags+0x40b/0x4d0
[ 149.523681][ T5341] ? __pfx_qnx6_fill_super+0x10/0x10
[ 149.525877][ T5341] ? __pfx_get_tree_bdev_flags+0x10/0x10
[ 149.528130][ T5341] vfs_get_tree+0x8f/0x2b0
[ 149.529732][ T5341] do_new_mount+0x302/0xa10
[ 149.531489][ T5341] ? apparmor_capable+0x137/0x1b0
[ 149.533529][ T5341] ? __pfx_do_new_mount+0x10/0x10
[ 149.535653][ T5341] ? ns_capable+0x8a/0xf0
[ 149.537541][ T5341] ? kmem_cache_free+0x19b/0x690
[ 149.539680][ T5341] __se_sys_mount+0x313/0x410
[ 149.541686][ T5341] ? __pfx___se_sys_mount+0x10/0x10
[ 149.543861][ T5341] ? do_syscall_64+0xbe/0xfa0
[ 149.545780][ T5341] ? __x64_sys_mount+0x20/0xc0
[ 149.547799][ T5341] do_syscall_64+0xfa/0xfa0
[ 149.549691][ T5341] ? lockdep_hardirqs_on+0x9c/0x150
[ 149.552023][ T5341] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 149.554562][ T5341] ? clear_bhb_loop+0x60/0xb0
[ 149.556708][ T5341] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 149.559221][ T5341] RIP: 0033:0x7f283838eec9
[ 149.561198][ T5341] 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
[ 149.569958][ T5341] RSP: 002b:00007f283922a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 149.573365][ T5341] RAX: ffffffffffffffda RBX: 00007f28385e6090 RCX: 00007f283838eec9
[ 149.576799][ T5341] RDX: 0000200000000040 RSI: 0000200000004a00 RDI: 0000200000000000
[ 149.580112][ T5341] RBP: 00007f2838411f91 R08: 0000000000000000 R09: 0000000000000000
[ 149.583593][ T5341] R10: 0000000002008087 R11: 0000000000000246 R12: 0000000000000000
[ 149.587092][ T5341] R13: 00007f28385e6128 R14: 00007f28385e6090 R15: 00007fff2c3dee78
[ 149.590356][ T5341]
[ 149.592035][ T5341] Kernel Offset: disabled
[ 149.593888][ T5341] Rebooting in 86400 seconds..