program:
socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000000c0)={0x0, 0x44}}, 0x2000040)
syz_open_dev$vim2m(0x0, 0x0, 0x2)
syz_mount_image$msdos(&(0x7f0000000040), &(0x7f0000000200)='./file0\x00', 0x10, &(0x7f0000001680)=ANY=[@ANYBLOB='uid=', @ANYRESHEX=0xee01, @ANYBLOB=',umask=000000000000000001,\x00\x00\x00\x00\x00\x00'], 0x1, 0x542, &(0x7f0000000b40)="$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")
open(&(0x7f0000000080)='./bus\x00', 0x1c92fe, 0x147)
r0 = open(&(0x7f0000000040)='./file2\x00', 0x181042, 0x124)
write$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$LOOP_SET_STATUS64(r1, 0x4c04, &(0x7f00000000c0)={0x0, 0x0, 0x0, 0x7fffffffffffffff, 0x3, 0x0, 0x0, 0x4, 0x0, "ef35af413bb901527fe4f1ce5d29c3ee5e5c3676345a41499db7aac63a01010000000000004faa2ae2c08485d90000000000007700000c00002000", "036c47c678082004cb59d654cb9b1b165263bdbcef549ba197fce47ddfdd753abd950100173400ffffff00f7ffffff000000f3e7f20000000200000000000600", "b732673e181c208227fffff2e500000f0000000e000200", [0x40000000004]})
openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000100)='net_prio.prioidx\x00', 0x275a, 0x0)
bpf$MAP_CREATE(0x0, 0x0, 0x50)
[ 116.639109][ T5289] Bluetooth: hci0: command tx timeout
[ 116.794886][ T5327] loop0: detected capacity change from 0 to 2048
[ 117.170698][ T5328] loop0: detected capacity change from 2048 to 0
[ 117.172450][ T44] I/O error, dev loop0, sector 128 op 0x1:(WRITE) flags 0x800000 phys_seg 1 prio class 2
[ 117.172601][ T44] Buffer I/O error on dev loop0, logical block 32, lost sync page write
[ 117.172897][ T5327] ------------[ cut here ]------------
[ 117.172905][ T5327] !buffer_uptodate(bh)
[ 117.172910][ T5327] WARNING: fs/buffer.c:991 at mark_buffer_dirty+0x299/0x410, CPU#0: syz.0.0/5327
[ 117.192577][ T5327] Modules linked in:
[ 117.195384][ T5327] CPU: 0 UID: 0 PID: 5327 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 117.198925][ T5327] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 117.203807][ T5327] RIP: 0010:mark_buffer_dirty+0x299/0x410
[ 117.206188][ T5327] Code: 4c 89 f7 e8 a9 01 d8 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 74 52 fb ff e8 8f 62 66 ff eb 8c e8 88 62 66 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 7a 62 66 ff 90 0f 0b 90 e9 cf fd ff ff
[ 117.214410][ T5327] RSP: 0018:ffffc9000de3f470 EFLAGS: 00010287
[ 117.217548][ T5327] RAX: ffffffff82617938 RBX: ffff888043de52a0 RCX: 0000000000100000
[ 117.222437][ T5327] RDX: ffffc9000ed8a000 RSI: 000000000002378a RDI: 000000000002378b
[ 117.226115][ T5327] RBP: dffffc0000000001 R08: ffff888043de52a7 R09: 1ffff110087bca54
[ 117.229298][ T5327] R10: dffffc0000000000 R11: ffffed10087bca55 R12: ffffffff8c28b180
[ 117.232544][ T5327] R13: ffff88803eb8c248 R14: dffffc0000000000 R15: ffff888013234788
[ 117.235820][ T5327] FS: 00007f92fcc2f6c0(0000) GS:ffff88808c2c6000(0000) knlGS:0000000000000000
[ 117.239359][ T5327] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 117.242066][ T5327] CR2: 00007f5b71711380 CR3: 000000001394d000 CR4: 0000000000352ef0
[ 117.245379][ T5327] Call Trace:
[ 117.246733][ T5327]
[ 117.247904][ T5327] mmb_mark_buffer_dirty+0x2c/0x1f0
[ 117.250092][ T5327] fat_ent_write+0xb8/0x190
[ 117.252047][ T5327] fat_chain_add+0x409/0x8e0
[ 117.254292][ T5327] ? __pfx_fat_chain_add+0x10/0x10
[ 117.256689][ T5327] ? fat_bmap+0x487/0x5a0
[ 117.258593][ T5327] fat_get_block+0x768/0xae0
[ 117.260841][ T5327] ? lock_acquire+0x115/0x350
[ 117.263077][ T5327] ? __pfx_fat_get_block+0x10/0x10
[ 117.265509][ T5327] ? do_raw_spin_unlock+0x4d/0x200
[ 117.267939][ T5327] ? _raw_spin_unlock+0x28/0x50
[ 117.270020][ T5327] ? create_empty_buffers+0x460/0x520
[ 117.272447][ T5327] __block_write_begin_int+0x6c2/0x1900
[ 117.274899][ T5327] ? __pfx_fat_get_block+0x10/0x10
[ 117.277020][ T5327] ? __pfx___block_write_begin_int+0x10/0x10
[ 117.279521][ T5327] cont_write_begin+0x71b/0xac0
[ 117.282594][ T5327] ? __pfx_cont_write_begin+0x10/0x10
[ 117.284930][ T5327] ? __pfx_unmap_mapping_range+0x10/0x10
[ 117.287297][ T5327] fat_write_begin+0x7a/0x150
[ 117.289188][ T5327] ? __pfx_fat_get_block+0x10/0x10
[ 117.291061][ T5327] generic_perform_write+0x2d5/0x8f0
[ 117.293003][ T5327] ? __pfx_generic_perform_write+0x10/0x10
[ 117.295446][ T5327] ? file_update_time_flags+0x3ab/0x440
[ 117.297772][ T5327] ? __generic_file_write_iter+0xf9/0x230
[ 117.300061][ T5327] ? generic_file_write_iter+0x9a/0x330
[ 117.302372][ T5327] generic_file_write_iter+0xae/0x330
[ 117.304541][ T5327] vfs_write+0x612/0xba0
[ 117.306232][ T5327] ? __pfx_vfs_write+0x10/0x10
[ 117.308123][ T5327] ? __fget_files+0x2a/0x420
[ 117.310071][ T5327] ksys_write+0x150/0x270
[ 117.311830][ T5327] ? __pfx_ksys_write+0x10/0x10
[ 117.313989][ T5327] do_syscall_64+0x166/0x520
[ 117.315926][ T5327] ? trace_irq_disable+0x3b/0x140
[ 117.318131][ T5327] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 117.320846][ T5327] ? clear_bhb_loop+0x70/0xc0
[ 117.323238][ T5327] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 117.326012][ T5327] RIP: 0033:0x7f92fbd9e159
[ 117.327833][ T5327] 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
[ 117.336069][ T5327] RSP: 002b:00007f92fcc2efe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 117.339583][ T5327] RAX: ffffffffffffffda RBX: 00007f92fc025fa0 RCX: 00007f92fbd9e159
[ 117.342928][ T5327] RDX: 00000000fffffceb RSI: 00002000000001c0 RDI: 0000000000000006
[ 117.346550][ T5327] RBP: 00007f92fbe3503b R08: 0000000000000000 R09: 0000000000000000
[ 117.349951][ T5327] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 117.353315][ T5327] R13: 00007f92fc026038 R14: 00007f92fc025fa0 R15: 00007ffc866e2a58
[ 117.356824][ T5327]
[ 117.358234][ T5327] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 117.361499][ T5327] CPU: 0 UID: 0 PID: 5327 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 117.365530][ T5327] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 117.369779][ T5327] Call Trace:
[ 117.371370][ T5327]
[ 117.372742][ T5327] vpanic+0x56d/0xa60
[ 117.374525][ T5327] ? __pfx__printk+0x10/0x10
[ 117.376588][ T5327] ? __pfx_vpanic+0x10/0x10
[ 117.378614][ T5327] ? is_bpf_text_address+0x292/0x2b0
[ 117.381032][ T5327] ? is_bpf_text_address+0x26/0x2b0
[ 117.383715][ T5327] panic+0xc5/0xd0
[ 117.385663][ T5327] ? __pfx_panic+0x10/0x10
[ 117.388067][ T5327] __warn+0x315/0x4c0
[ 117.389986][ T5327] ? mark_buffer_dirty+0x299/0x410
[ 117.392775][ T5327] ? mark_buffer_dirty+0x299/0x410
[ 117.395001][ T5327] __report_bug+0x276/0x570
[ 117.397026][ T5327] ? mark_buffer_dirty+0x299/0x410
[ 117.399280][ T5327] ? __pfx___report_bug+0x10/0x10
[ 117.401573][ T5327] ? schedule+0x16e/0x2b0
[ 117.403560][ T5327] ? io_schedule+0x7f/0xd0
[ 117.405510][ T5327] ? mark_buffer_dirty+0x299/0x410
[ 117.407545][ T5327] report_bug+0x16b/0x220
[ 117.409386][ T5327] ? mark_buffer_dirty+0x299/0x410
[ 117.411672][ T5327] ? mark_buffer_dirty+0x29b/0x410
[ 117.413867][ T5327] handle_bug+0x9c/0x200
[ 117.415562][ T5327] exc_invalid_op+0x1a/0x50
[ 117.417781][ T5327] asm_exc_invalid_op+0x1a/0x20
[ 117.419992][ T5327] RIP: 0010:mark_buffer_dirty+0x299/0x410
[ 117.422497][ T5327] Code: 4c 89 f7 e8 a9 01 d8 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 74 52 fb ff e8 8f 62 66 ff eb 8c e8 88 62 66 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 7a 62 66 ff 90 0f 0b 90 e9 cf fd ff ff
[ 117.430534][ T5327] RSP: 0018:ffffc9000de3f470 EFLAGS: 00010287
[ 117.433081][ T5327] RAX: ffffffff82617938 RBX: ffff888043de52a0 RCX: 0000000000100000
[ 117.436444][ T5327] RDX: ffffc9000ed8a000 RSI: 000000000002378a RDI: 000000000002378b
[ 117.439815][ T5327] RBP: dffffc0000000001 R08: ffff888043de52a7 R09: 1ffff110087bca54
[ 117.443250][ T5327] R10: dffffc0000000000 R11: ffffed10087bca55 R12: ffffffff8c28b180
[ 117.446617][ T5327] R13: ffff88803eb8c248 R14: dffffc0000000000 R15: ffff888013234788
[ 117.449993][ T5327] ? mark_buffer_dirty+0x298/0x410
[ 117.452185][ T5327] mmb_mark_buffer_dirty+0x2c/0x1f0
[ 117.454228][ T5327] fat_ent_write+0xb8/0x190
[ 117.456116][ T5327] fat_chain_add+0x409/0x8e0
[ 117.458112][ T5327] ? __pfx_fat_chain_add+0x10/0x10
[ 117.460212][ T5327] ? fat_bmap+0x487/0x5a0
[ 117.462041][ T5327] fat_get_block+0x768/0xae0
[ 117.463905][ T5327] ? lock_acquire+0x115/0x350
[ 117.465924][ T5327] ? __pfx_fat_get_block+0x10/0x10
[ 117.468091][ T5327] ? do_raw_spin_unlock+0x4d/0x200
[ 117.470337][ T5327] ? _raw_spin_unlock+0x28/0x50
[ 117.472522][ T5327] ? create_empty_buffers+0x460/0x520
[ 117.474914][ T5327] __block_write_begin_int+0x6c2/0x1900
[ 117.477060][ T5327] ? __pfx_fat_get_block+0x10/0x10
[ 117.479060][ T5327] ? __pfx___block_write_begin_int+0x10/0x10
[ 117.481407][ T5327] cont_write_begin+0x71b/0xac0
[ 117.483534][ T5327] ? __pfx_cont_write_begin+0x10/0x10
[ 117.485826][ T5327] ? __pfx_unmap_mapping_range+0x10/0x10
[ 117.487955][ T5327] fat_write_begin+0x7a/0x150
[ 117.489945][ T5327] ? __pfx_fat_get_block+0x10/0x10
[ 117.492044][ T5327] generic_perform_write+0x2d5/0x8f0
[ 117.494255][ T5327] ? __pfx_generic_perform_write+0x10/0x10
[ 117.496652][ T5327] ? file_update_time_flags+0x3ab/0x440
[ 117.498998][ T5327] ? __generic_file_write_iter+0xf9/0x230
[ 117.501467][ T5327] ? generic_file_write_iter+0x9a/0x330
[ 117.503805][ T5327] generic_file_write_iter+0xae/0x330
[ 117.506255][ T5327] vfs_write+0x612/0xba0
[ 117.508082][ T5327] ? __pfx_vfs_write+0x10/0x10
[ 117.510199][ T5327] ? __fget_files+0x2a/0x420
[ 117.512249][ T5327] ksys_write+0x150/0x270
[ 117.514118][ T5327] ? __pfx_ksys_write+0x10/0x10
[ 117.516225][ T5327] do_syscall_64+0x166/0x520
[ 117.518166][ T5327] ? trace_irq_disable+0x3b/0x140
[ 117.520113][ T5327] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 117.522573][ T5327] ? clear_bhb_loop+0x70/0xc0
[ 117.524492][ T5327] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 117.526918][ T5327] RIP: 0033:0x7f92fbd9e159
[ 117.528747][ T5327] 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
[ 117.536969][ T5327] RSP: 002b:00007f92fcc2efe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 117.540271][ T5327] RAX: ffffffffffffffda RBX: 00007f92fc025fa0 RCX: 00007f92fbd9e159
[ 117.543645][ T5327] RDX: 00000000fffffceb RSI: 00002000000001c0 RDI: 0000000000000006
[ 117.546732][ T5327] RBP: 00007f92fbe3503b R08: 0000000000000000 R09: 0000000000000000
[ 117.549912][ T5327] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 117.553229][ T5327] R13: 00007f92fc026038 R14: 00007f92fc025fa0 R15: 00007ffc866e2a58
[ 117.556371][ T5327]
[ 117.558120][ T5327] Kernel Offset: disabled
[ 117.559997][ T5327] Rebooting in 86400 seconds..