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$P9_RREADDIR(r0, &(0x7f00000001c0)={0x2a, 0x29, 0x3, {0x5, [{{0x10, 0x9, 0x5}, 0x7, 0x7, 0xf45b3bccc711007a, './file0'}]}}, 0xfffffceb)
mount(&(0x7f0000000440)=@loop={'/dev/loop', 0x0}, &(0x7f0000000200)='./bus\x00', 0x0, 0x1000, 0x0)
r1 = open(&(0x7f0000000000)='./bus\x00', 0x0, 0xa27b734c1a0bc97)
ioctl$LOOP_SET_STATUS64(r1, 0x4c04, &(0x7f00000000c0)={0x0, 0x0, 0x0, 0x7fffffffffffffff, 0x3, 0x0, 0x0, 0x4, 0x0, "ef35af413bb901527fe4f1ce5d29c3ee5e5c3676345a41499db7aac63a01010000000000004faa2ae2c08485d90000000000007700000c00002000", "036c47c678082004cb59d654cb9b1b165263bdbcef549ba197fce47ddfdd753abd950100173400ffffff00f7ffffff000000f3e7f20000000200000000000600", "b732673e181c208227fffff2e500000f0000000e000200", [0x40000000004]})
[ 102.003777][ T5283] Bluetooth: hci0: command tx timeout
[ 102.105352][ T5319] loop0: detected capacity change from 0 to 128
[ 102.364423][ T5320] loop0: detected capacity change from 128 to 0
[ 102.367670][ T14] I/O error, dev loop0, sector 1 op 0x1:(WRITE) flags 0x800000 phys_seg 1 prio class 2
[ 102.368820][ T14] Buffer I/O error on dev loop0, logical block 1, lost sync page write
[ 102.369162][ T5319] ------------[ cut here ]------------
[ 102.369167][ T5319] !buffer_uptodate(bh)
[ 102.369171][ T5319] WARNING: fs/buffer.c:991 at mark_buffer_dirty+0x299/0x410, CPU#0: syz.0.0/5319
[ 102.388112][ T5319] Modules linked in:
[ 102.390036][ T5319] CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 102.394256][ T5319] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 102.398957][ T5319] RIP: 0010:mark_buffer_dirty+0x299/0x410
[ 102.401537][ T5319] 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
[ 102.410290][ T5319] RSP: 0000:ffffc90006ee7438 EFLAGS: 00010283
[ 102.415573][ T5319] RAX: ffffffff8261a398 RBX: ffff88804408a1c0 RCX: 0000000000100000
[ 102.419185][ T5319] RDX: ffffc9000eeda000 RSI: 00000000000201a0 RDI: 00000000000201a1
[ 102.422911][ T5319] RBP: dffffc0000000001 R08: ffff88804408a1c7 R09: 1ffff11008811438
[ 102.426507][ T5319] R10: dffffc0000000000 R11: ffffed1008811439 R12: dffffc0000000000
[ 102.430110][ T5319] R13: 1ffff92000ddcebe R14: ffffc90006ee75f0 R15: ffff888044194788
[ 102.433629][ T5319] FS: 00007fc7823f56c0(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000
[ 102.437598][ T5319] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 102.440558][ T5319] CR2: 00007f6da2cba941 CR3: 000000000bf09000 CR4: 0000000000352ef0
[ 102.444053][ T5319] Call Trace:
[ 102.445584][ T5319]
[ 102.446960][ T5319] mmb_mark_buffer_dirty+0x2c/0x1f0
[ 102.449251][ T5319] fat12_ent_put+0x1b7/0x2f0
[ 102.451427][ T5319] fat_ent_write+0xb8/0x190
[ 102.453702][ T5319] fat_chain_add+0x409/0x8e0
[ 102.455671][ T5319] ? __pfx_fat_chain_add+0x10/0x10
[ 102.457861][ T5319] ? clean_bdev_aliases+0x62e/0x750
[ 102.460074][ T5319] ? fat_bmap+0x487/0x5a0
[ 102.462077][ T5319] fat_get_block+0x768/0xae0
[ 102.464088][ T5319] ? __pfx_fat_get_block+0x10/0x10
[ 102.466247][ T5319] ? do_raw_spin_unlock+0x4d/0x200
[ 102.468402][ T5319] ? _raw_spin_unlock+0x28/0x50
[ 102.471016][ T5319] ? create_empty_buffers+0x460/0x520
[ 102.473776][ T5319] __block_write_begin_int+0x6c2/0x1900
[ 102.476308][ T5319] ? __pfx_fat_get_block+0x10/0x10
[ 102.478510][ T5319] ? __pfx___block_write_begin_int+0x10/0x10
[ 102.481106][ T5319] cont_write_begin+0x71b/0xac0
[ 102.483506][ T5319] ? __pfx_cont_write_begin+0x10/0x10
[ 102.485871][ T5319] ? do_raw_spin_unlock+0x4d/0x200
[ 102.488157][ T5319] ? _raw_spin_unlock+0x28/0x50
[ 102.490362][ T5319] fat_write_begin+0x7a/0x150
[ 102.492445][ T5319] ? __pfx_fat_get_block+0x10/0x10
[ 102.494886][ T5319] generic_perform_write+0x2d5/0x8f0
[ 102.497233][ T5319] ? __pfx_generic_perform_write+0x10/0x10
[ 102.499793][ T5319] ? file_update_time_flags+0x3ab/0x440
[ 102.502288][ T5319] ? __generic_file_write_iter+0xf9/0x230
[ 102.504923][ T5319] ? generic_file_write_iter+0x9a/0x330
[ 102.507386][ T5319] generic_file_write_iter+0xae/0x330
[ 102.509766][ T5319] vfs_write+0x612/0xba0
[ 102.511695][ T5319] ? __pfx_vfs_write+0x10/0x10
[ 102.513904][ T5319] ? __fget_files+0x2a/0x420
[ 102.516118][ T5319] ksys_write+0x150/0x270
[ 102.518077][ T5319] ? __pfx_ksys_write+0x10/0x10
[ 102.519978][ T5319] do_syscall_64+0x166/0x520
[ 102.522059][ T5319] ? trace_irq_disable+0x3b/0x140
[ 102.524582][ T5319] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 102.527222][ T5319] ? clear_bhb_loop+0x70/0xc0
[ 102.529299][ T5319] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 102.531809][ T5319] RIP: 0033:0x7fc785f9e159
[ 102.534027][ T5319] 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
[ 102.542453][ T5319] RSP: 002b:00007fc7823f4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 102.545629][ T5319] RAX: ffffffffffffffda RBX: 00007fc786225fa0 RCX: 00007fc785f9e159
[ 102.548573][ T5319] RDX: 00000000fffffceb RSI: 00002000000001c0 RDI: 0000000000000005
[ 102.551476][ T5319] RBP: 00007fc78603506b R08: 0000000000000000 R09: 0000000000000000
[ 102.554827][ T5319] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 102.558051][ T5319] R13: 00007fc786226038 R14: 00007fc786225fa0 R15: 00007fff149652a8
[ 102.561523][ T5319]
[ 102.563074][ T5319] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 102.566408][ T5319] CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 102.570516][ T5319] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 102.575040][ T5319] Call Trace:
[ 102.576469][ T5319]
[ 102.577704][ T5319] vpanic+0x56d/0xa60
[ 102.579549][ T5319] ? __pfx__printk+0x10/0x10
[ 102.581642][ T5319] ? __pfx_vpanic+0x10/0x10
[ 102.583748][ T5319] ? is_bpf_text_address+0x292/0x2b0
[ 102.586122][ T5319] ? is_bpf_text_address+0x26/0x2b0
[ 102.588455][ T5319] panic+0xc5/0xd0
[ 102.589991][ T5319] ? __pfx_panic+0x10/0x10
[ 102.591878][ T5319] __warn+0x315/0x4c0
[ 102.593698][ T5319] ? mark_buffer_dirty+0x299/0x410
[ 102.595968][ T5319] ? mark_buffer_dirty+0x299/0x410
[ 102.598242][ T5319] __report_bug+0x276/0x570
[ 102.600187][ T5319] ? __pfx___schedule+0x10/0x10
[ 102.602332][ T5319] ? mark_buffer_dirty+0x299/0x410
[ 102.604663][ T5319] ? __pfx___report_bug+0x10/0x10
[ 102.606790][ T5319] ? schedule+0x90/0x2b0
[ 102.608551][ T5319] ? __lock_acquire+0x747/0x2de0
[ 102.610622][ T5319] ? mark_buffer_dirty+0x299/0x410
[ 102.612697][ T5319] report_bug+0x16b/0x220
[ 102.614587][ T5319] ? mark_buffer_dirty+0x299/0x410
[ 102.616808][ T5319] ? mark_buffer_dirty+0x29b/0x410
[ 102.619041][ T5319] handle_bug+0x9c/0x200
[ 102.620884][ T5319] exc_invalid_op+0x1a/0x50
[ 102.622743][ T5319] asm_exc_invalid_op+0x1a/0x20
[ 102.624674][ T5319] RIP: 0010:mark_buffer_dirty+0x299/0x410
[ 102.627047][ T5319] 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
[ 102.634953][ T5319] RSP: 0000:ffffc90006ee7438 EFLAGS: 00010283
[ 102.637498][ T5319] RAX: ffffffff8261a398 RBX: ffff88804408a1c0 RCX: 0000000000100000
[ 102.640861][ T5319] RDX: ffffc9000eeda000 RSI: 00000000000201a0 RDI: 00000000000201a1
[ 102.644184][ T5319] RBP: dffffc0000000001 R08: ffff88804408a1c7 R09: 1ffff11008811438
[ 102.647472][ T5319] R10: dffffc0000000000 R11: ffffed1008811439 R12: dffffc0000000000
[ 102.650683][ T5319] R13: 1ffff92000ddcebe R14: ffffc90006ee75f0 R15: ffff888044194788
[ 102.654020][ T5319] ? mark_buffer_dirty+0x298/0x410
[ 102.656308][ T5319] ? mark_buffer_dirty+0x298/0x410
[ 102.658499][ T5319] mmb_mark_buffer_dirty+0x2c/0x1f0
[ 102.660802][ T5319] fat12_ent_put+0x1b7/0x2f0
[ 102.662844][ T5319] fat_ent_write+0xb8/0x190
[ 102.664785][ T5319] fat_chain_add+0x409/0x8e0
[ 102.666807][ T5319] ? __pfx_fat_chain_add+0x10/0x10
[ 102.668981][ T5319] ? clean_bdev_aliases+0x62e/0x750
[ 102.671122][ T5319] ? fat_bmap+0x487/0x5a0
[ 102.673009][ T5319] fat_get_block+0x768/0xae0
[ 102.674984][ T5319] ? __pfx_fat_get_block+0x10/0x10
[ 102.677156][ T5319] ? do_raw_spin_unlock+0x4d/0x200
[ 102.679436][ T5319] ? _raw_spin_unlock+0x28/0x50
[ 102.681642][ T5319] ? create_empty_buffers+0x460/0x520
[ 102.684427][ T5319] __block_write_begin_int+0x6c2/0x1900
[ 102.687342][ T5319] ? __pfx_fat_get_block+0x10/0x10
[ 102.689835][ T5319] ? __pfx___block_write_begin_int+0x10/0x10
[ 102.692424][ T5319] cont_write_begin+0x71b/0xac0
[ 102.694505][ T5319] ? __pfx_cont_write_begin+0x10/0x10
[ 102.696765][ T5319] ? do_raw_spin_unlock+0x4d/0x200
[ 102.698958][ T5319] ? _raw_spin_unlock+0x28/0x50
[ 102.701081][ T5319] fat_write_begin+0x7a/0x150
[ 102.703086][ T5319] ? __pfx_fat_get_block+0x10/0x10
[ 102.705308][ T5319] generic_perform_write+0x2d5/0x8f0
[ 102.707566][ T5319] ? __pfx_generic_perform_write+0x10/0x10
[ 102.709883][ T5319] ? file_update_time_flags+0x3ab/0x440
[ 102.712123][ T5319] ? __generic_file_write_iter+0xf9/0x230
[ 102.714460][ T5319] ? generic_file_write_iter+0x9a/0x330
[ 102.716701][ T5319] generic_file_write_iter+0xae/0x330
[ 102.718896][ T5319] vfs_write+0x612/0xba0
[ 102.720542][ T5319] ? __pfx_vfs_write+0x10/0x10
[ 102.722510][ T5319] ? __fget_files+0x2a/0x420
[ 102.724534][ T5319] ksys_write+0x150/0x270
[ 102.726234][ T5319] ? __pfx_ksys_write+0x10/0x10
[ 102.728122][ T5319] do_syscall_64+0x166/0x520
[ 102.730065][ T5319] ? trace_irq_disable+0x3b/0x140
[ 102.732169][ T5319] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 102.734688][ T5319] ? clear_bhb_loop+0x70/0xc0
[ 102.736583][ T5319] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 102.738859][ T5319] RIP: 0033:0x7fc785f9e159
[ 102.740584][ T5319] 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
[ 102.748388][ T5319] RSP: 002b:00007fc7823f4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 102.751935][ T5319] RAX: ffffffffffffffda RBX: 00007fc786225fa0 RCX: 00007fc785f9e159
[ 102.755373][ T5319] RDX: 00000000fffffceb RSI: 00002000000001c0 RDI: 0000000000000005
[ 102.758775][ T5319] RBP: 00007fc78603506b R08: 0000000000000000 R09: 0000000000000000
[ 102.762072][ T5319] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 102.765379][ T5319] R13: 00007fc786226038 R14: 00007fc786225fa0 R15: 00007fff149652a8
[ 102.768761][ T5319]
[ 102.770509][ T5319] Kernel Offset: disabled
[ 102.772363][ T5319] Rebooting in 86400 seconds..