program:
syz_mount_image$vfat(&(0x7f0000000040), &(0x7f0000000080)='./file1aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\x00', 0x200010, &(0x7f0000000680)=ANY=[@ANYRES64=0x0], 0x1, 0x25a, &(0x7f0000000240)="$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")
open(&(0x7f0000000180)='./bus\x00', 0x14927e, 0x9)
r0 = open(&(0x7f0000000040)='./file2\x00', 0x181042, 0x124)
write$P9_RREADDIR(r0, &(0x7f00000001c0)={0x2a, 0x29, 0x3, {0x5, [{{0x10, 0x9, 0x5}, 0x7, 0x7, 0xf45b3bccc711007a, './file0'}]}}, 0xfffffceb)
r1 = socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$nl_generic(r1, &(0x7f0000000640)={0x0, 0x0, &(0x7f0000001ac0)={&(0x7f0000000340)={0x14, 0x27, 0x1, 0x70bd2b, 0x25dfdbfe, {0x10}}, 0x14}}, 0x4004804)
mount(&(0x7f0000000440)=@loop={'/dev/loop', 0x0}, &(0x7f0000000200)='./bus\x00', 0x0, 0x1000, 0x0)
r2 = open(&(0x7f0000000000)='./bus\x00', 0x0, 0xa27b734c1a0bc97)
ioctl$LOOP_SET_STATUS64(r2, 0x4c04, &(0x7f00000000c0)={0x0, 0x0, 0x0, 0x7fffffffffffffff, 0x3, 0x0, 0x0, 0x4, 0x0, "ef35af413bb901527fe4f1ce5d29c3ee5e5c3676345a41499db7aac63a01010000000000004faa2ae2c08485d90000000000007700000c00002000", "036c47c678082004cb59d654cb9b1b165263bdbcef549ba197fce47ddfdd753abd950100173400ffffff00f7ffffff000000f3e7f20000000200000000000600", "b732673e181c208227fffff2e500000f0000000e000200", [0x40000000004]})
[ 104.375680][ T4646] Bluetooth: hci0: command tx timeout
[ 104.497029][ T5324] loop0: detected capacity change from 0 to 128
[ 104.722120][ T5325] loop0: detected capacity change from 128 to 0
[ 104.735621][ T13] I/O error, dev loop0, sector 1 op 0x1:(WRITE) flags 0x800000 phys_seg 1 prio class 2
[ 104.735831][ T13] Buffer I/O error on dev loop0, logical block 1, lost sync page write
[ 104.736060][ T5324] ------------[ cut here ]------------
[ 104.736068][ T5324] !buffer_uptodate(bh)
[ 104.736084][ T5324] WARNING: fs/buffer.c:991 at mark_buffer_dirty+0x299/0x410, CPU#0: syz.0.0/5324
[ 104.760551][ T5324] Modules linked in:
[ 104.762346][ T5324] CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 104.766149][ T5324] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 104.771432][ T5324] RIP: 0010:mark_buffer_dirty+0x299/0x410
[ 104.774853][ T5324] Code: 4c 89 f7 e8 69 fa d7 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 74 52 fb ff e8 af 58 66 ff eb 8c e8 a8 58 66 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 9a 58 66 ff 90 0f 0b 90 e9 cf fd ff ff
[ 104.783059][ T5324] RSP: 0018:ffffc9000db27438 EFLAGS: 00010283
[ 104.787229][ T5324] RAX: ffffffff8261a398 RBX: ffff888042ebb000 RCX: 0000000000100000
[ 104.790892][ T5324] RDX: ffffc9000eb62000 RSI: 00000000000420ad RDI: 00000000000420ae
[ 104.794310][ T5324] RBP: dffffc0000000001 R08: ffff888042ebb007 R09: 1ffff110085d7600
[ 104.798035][ T5324] R10: dffffc0000000000 R11: ffffed10085d7601 R12: dffffc0000000000
[ 104.801448][ T5324] R13: 1ffff92001b64ebe R14: ffffc9000db275f0 R15: ffff888042f74788
[ 104.804766][ T5324] FS: 00007f6b7508a6c0(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000
[ 104.809189][ T5324] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 104.816116][ T5324] CR2: 00007f6b743f36b8 CR3: 0000000040aa5000 CR4: 0000000000352ef0
[ 104.819670][ T5324] Call Trace:
[ 104.821677][ T5324]
[ 104.823046][ T5324] mmb_mark_buffer_dirty+0x2c/0x1f0
[ 104.825047][ T5324] fat12_ent_put+0x1b7/0x2f0
[ 104.827476][ T5324] fat_ent_write+0xb8/0x190
[ 104.829201][ T5324] fat_chain_add+0x409/0x8e0
[ 104.831143][ T5324] ? __pfx_fat_chain_add+0x10/0x10
[ 104.834146][ T5324] ? fat_bmap+0x487/0x5a0
[ 104.836003][ T5324] fat_get_block+0x768/0xae0
[ 104.838061][ T5324] ? lock_acquire+0x115/0x350
[ 104.841026][ T5324] ? __pfx_fat_get_block+0x10/0x10
[ 104.843278][ T5324] ? do_raw_spin_unlock+0x4d/0x200
[ 104.845437][ T5324] ? _raw_spin_unlock+0x28/0x50
[ 104.847620][ T5324] ? create_empty_buffers+0x460/0x520
[ 104.850018][ T5324] __block_write_begin_int+0x6c2/0x1900
[ 104.854526][ T5324] ? __pfx_fat_get_block+0x10/0x10
[ 104.856493][ T5324] ? __pfx___block_write_begin_int+0x10/0x10
[ 104.858764][ T5324] cont_write_begin+0x71b/0xac0
[ 104.861089][ T5324] ? __pfx_cont_write_begin+0x10/0x10
[ 104.863291][ T5324] ? do_raw_spin_unlock+0x4d/0x200
[ 104.865376][ T5324] ? _raw_spin_unlock+0x28/0x50
[ 104.867479][ T5324] fat_write_begin+0x7a/0x150
[ 104.869611][ T5324] ? __pfx_fat_get_block+0x10/0x10
[ 104.872040][ T5324] generic_perform_write+0x2d5/0x8f0
[ 104.874224][ T5324] ? __pfx_generic_perform_write+0x10/0x10
[ 104.876613][ T5324] ? file_update_time_flags+0x3ab/0x440
[ 104.878790][ T5324] ? __generic_file_write_iter+0xf9/0x230
[ 104.881292][ T5324] ? generic_file_write_iter+0x9a/0x330
[ 104.883434][ T5324] generic_file_write_iter+0xae/0x330
[ 104.885690][ T5324] vfs_write+0x612/0xba0
[ 104.887513][ T5324] ? __pfx_vfs_write+0x10/0x10
[ 104.889275][ T5324] ? __fget_files+0x2a/0x420
[ 104.891339][ T5324] ksys_write+0x150/0x270
[ 104.893265][ T5324] ? __pfx_ksys_write+0x10/0x10
[ 104.895222][ T5324] do_syscall_64+0x166/0x520
[ 104.897197][ T5324] ? trace_irq_disable+0x3b/0x140
[ 104.899375][ T5324] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 104.902188][ T5324] ? clear_bhb_loop+0x70/0xc0
[ 104.904278][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 104.906886][ T5324] RIP: 0033:0x7f6b7419e159
[ 104.909172][ T5324] 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
[ 104.918059][ T5324] RSP: 002b:00007f6b75089fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 104.921708][ T5324] RAX: ffffffffffffffda RBX: 00007f6b74425fa0 RCX: 00007f6b7419e159
[ 104.925266][ T5324] RDX: 00000000fffffceb RSI: 00002000000001c0 RDI: 0000000000000005
[ 104.928457][ T5324] RBP: 00007f6b7423506b R08: 0000000000000000 R09: 0000000000000000
[ 104.932052][ T5324] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 104.935359][ T5324] R13: 00007f6b74426038 R14: 00007f6b74425fa0 R15: 00007ffd8e9a3528
[ 104.938919][ T5324]
[ 104.940126][ T5324] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 104.943032][ T5324] CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 104.946745][ T5324] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 104.950938][ T5324] Call Trace:
[ 104.952370][ T5324]
[ 104.953650][ T5324] vpanic+0x56d/0xa60
[ 104.955358][ T5324] ? __pfx__printk+0x10/0x10
[ 104.957234][ T5324] ? __pfx_vpanic+0x10/0x10
[ 104.959081][ T5324] ? is_bpf_text_address+0x292/0x2b0
[ 104.961141][ T5324] ? is_bpf_text_address+0x26/0x2b0
[ 104.963496][ T5324] panic+0xc5/0xd0
[ 104.965310][ T5324] ? __pfx_panic+0x10/0x10
[ 104.967408][ T5324] __warn+0x315/0x4c0
[ 104.969275][ T5324] ? mark_buffer_dirty+0x299/0x410
[ 104.971480][ T5324] ? mark_buffer_dirty+0x299/0x410
[ 104.973660][ T5324] __report_bug+0x276/0x570
[ 104.975462][ T5324] ? __pfx___schedule+0x10/0x10
[ 104.977569][ T5324] ? mark_buffer_dirty+0x299/0x410
[ 104.979937][ T5324] ? __pfx___report_bug+0x10/0x10
[ 104.982245][ T5324] ? schedule+0x90/0x2b0
[ 104.984069][ T5324] ? __lock_acquire+0x747/0x2de0
[ 104.986237][ T5324] ? mark_buffer_dirty+0x299/0x410
[ 104.988425][ T5324] report_bug+0x16b/0x220
[ 104.990428][ T5324] ? mark_buffer_dirty+0x299/0x410
[ 104.992758][ T5324] ? mark_buffer_dirty+0x29b/0x410
[ 104.995000][ T5324] handle_bug+0x9c/0x200
[ 104.996860][ T5324] exc_invalid_op+0x1a/0x50
[ 104.998919][ T5324] asm_exc_invalid_op+0x1a/0x20
[ 105.001095][ T5324] RIP: 0010:mark_buffer_dirty+0x299/0x410
[ 105.003576][ T5324] Code: 4c 89 f7 e8 69 fa d7 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 74 52 fb ff e8 af 58 66 ff eb 8c e8 a8 58 66 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 9a 58 66 ff 90 0f 0b 90 e9 cf fd ff ff
[ 105.011852][ T5324] RSP: 0018:ffffc9000db27438 EFLAGS: 00010283
[ 105.014548][ T5324] RAX: ffffffff8261a398 RBX: ffff888042ebb000 RCX: 0000000000100000
[ 105.017872][ T5324] RDX: ffffc9000eb62000 RSI: 00000000000420ad RDI: 00000000000420ae
[ 105.021333][ T5324] RBP: dffffc0000000001 R08: ffff888042ebb007 R09: 1ffff110085d7600
[ 105.024844][ T5324] R10: dffffc0000000000 R11: ffffed10085d7601 R12: dffffc0000000000
[ 105.028405][ T5324] R13: 1ffff92001b64ebe R14: ffffc9000db275f0 R15: ffff888042f74788
[ 105.031991][ T5324] ? mark_buffer_dirty+0x298/0x410
[ 105.034312][ T5324] ? mark_buffer_dirty+0x298/0x410
[ 105.036627][ T5324] mmb_mark_buffer_dirty+0x2c/0x1f0
[ 105.038947][ T5324] fat12_ent_put+0x1b7/0x2f0
[ 105.041068][ T5324] fat_ent_write+0xb8/0x190
[ 105.043045][ T5324] fat_chain_add+0x409/0x8e0
[ 105.045093][ T5324] ? __pfx_fat_chain_add+0x10/0x10
[ 105.047390][ T5324] ? fat_bmap+0x487/0x5a0
[ 105.049402][ T5324] fat_get_block+0x768/0xae0
[ 105.051474][ T5324] ? lock_acquire+0x115/0x350
[ 105.053655][ T5324] ? __pfx_fat_get_block+0x10/0x10
[ 105.055886][ T5324] ? do_raw_spin_unlock+0x4d/0x200
[ 105.058097][ T5324] ? _raw_spin_unlock+0x28/0x50
[ 105.060272][ T5324] ? create_empty_buffers+0x460/0x520
[ 105.062606][ T5324] __block_write_begin_int+0x6c2/0x1900
[ 105.065072][ T5324] ? __pfx_fat_get_block+0x10/0x10
[ 105.067423][ T5324] ? __pfx___block_write_begin_int+0x10/0x10
[ 105.070147][ T5324] cont_write_begin+0x71b/0xac0
[ 105.072368][ T5324] ? __pfx_cont_write_begin+0x10/0x10
[ 105.074770][ T5324] ? do_raw_spin_unlock+0x4d/0x200
[ 105.077051][ T5324] ? _raw_spin_unlock+0x28/0x50
[ 105.079295][ T5324] fat_write_begin+0x7a/0x150
[ 105.081415][ T5324] ? __pfx_fat_get_block+0x10/0x10
[ 105.083733][ T5324] generic_perform_write+0x2d5/0x8f0
[ 105.085942][ T5324] ? __pfx_generic_perform_write+0x10/0x10
[ 105.088347][ T5324] ? file_update_time_flags+0x3ab/0x440
[ 105.090603][ T5324] ? __generic_file_write_iter+0xf9/0x230
[ 105.092656][ T5324] ? generic_file_write_iter+0x9a/0x330
[ 105.094790][ T5324] generic_file_write_iter+0xae/0x330
[ 105.096923][ T5324] vfs_write+0x612/0xba0
[ 105.098693][ T5324] ? __pfx_vfs_write+0x10/0x10
[ 105.100864][ T5324] ? __fget_files+0x2a/0x420
[ 105.102718][ T5324] ksys_write+0x150/0x270
[ 105.104392][ T5324] ? __pfx_ksys_write+0x10/0x10
[ 105.106309][ T5324] do_syscall_64+0x166/0x520
[ 105.108270][ T5324] ? trace_irq_disable+0x3b/0x140
[ 105.110582][ T5324] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 105.113344][ T5324] ? clear_bhb_loop+0x70/0xc0
[ 105.115088][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 105.117573][ T5324] RIP: 0033:0x7f6b7419e159
[ 105.119643][ T5324] 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
[ 105.128131][ T5324] RSP: 002b:00007f6b75089fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 105.131652][ T5324] RAX: ffffffffffffffda RBX: 00007f6b74425fa0 RCX: 00007f6b7419e159
[ 105.134426][ T5324] RDX: 00000000fffffceb RSI: 00002000000001c0 RDI: 0000000000000005
[ 105.137143][ T5324] RBP: 00007f6b7423506b R08: 0000000000000000 R09: 0000000000000000
[ 105.139963][ T5324] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 105.142774][ T5324] R13: 00007f6b74426038 R14: 00007f6b74425fa0 R15: 00007ffd8e9a3528
[ 105.145632][ T5324]
[ 105.147690][ T5324] Kernel Offset: disabled
[ 105.149612][ T5324] Rebooting in 86400 seconds..