Kernel panic - not syncing: KASAN: panic_on_warn set ...
CPU: 0 UID: 0 PID: 5335 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 panic+0x349/0x880 kernel/panic.c:354
 check_panic_on_warn+0x86/0xb0 kernel/panic.c:243
 end_report+0x77/0x160 mm/kasan/report.c:227
 kasan_report+0x154/0x180 mm/kasan/report.c:604
 memscan+0x62/0x80 lib/string.c:717
 __printbuf_do_indent fs/bcachefs/printbuf.c:101 [inline]
 printbuf_do_indent+0x10d/0x9d0 fs/bcachefs/printbuf.c:155
 bch2_prt_printf+0x559/0x6d0 fs/bcachefs/printbuf.c:190
 trace_bucket_alloc2+0x119/0xba0 fs/bcachefs/alloc_foreground.c:564
 bch2_bucket_alloc_trans+0x3a43/0x3a50 fs/bcachefs/alloc_foreground.c:678
 bch2_bucket_alloc_set_trans+0x517/0xd30 fs/bcachefs/alloc_foreground.c:808
 __open_bucket_add_buckets+0x13d0/0x1ec0 fs/bcachefs/alloc_foreground.c:1057
 open_bucket_add_buckets+0x33a/0x410 fs/bcachefs/alloc_foreground.c:1101
 bch2_alloc_sectors_start_trans+0xce9/0x2030
 __bch2_write+0x72b/0x5dd0 fs/bcachefs/io_write.c:1437
 bch2_write+0x9b5/0x1760 fs/bcachefs/io_write.c:1631
 closure_queue include/linux/closure.h:270 [inline]
 closure_call include/linux/closure.h:432 [inline]
 bch2_writepage_do_io fs/bcachefs/fs-io-buffered.c:449 [inline]
 bch2_writepages+0x284/0x390 fs/bcachefs/fs-io-buffered.c:641
 do_writepages+0x35f/0x880 mm/page-writeback.c:2702
 filemap_fdatawrite_wbc mm/filemap.c:397 [inline]
 __filemap_fdatawrite_range mm/filemap.c:430 [inline]
 file_write_and_wait_range+0x2a3/0x3c0 mm/filemap.c:787
 bch2_fsync+0x13a/0x360 fs/bcachefs/fs-io.c:199
 generic_write_sync include/linux/fs.h:2904 [inline]
 bch2_write_iter+0x222f/0x2440 fs/bcachefs/fs-io-buffered.c:1061
 iter_file_splice_write+0xbfa/0x1510 fs/splice.c:743
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x11b/0x220 fs/splice.c:1164
 splice_direct_to_actor+0x586/0xc80 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x289/0x3e0 fs/splice.c:1233
 vfs_copy_file_range+0xd1f/0x1510 fs/read_write.c:1620
 __do_sys_copy_file_range fs/read_write.c:1670 [inline]
 __se_sys_copy_file_range+0x3fa/0x600 fs/read_write.c:1637
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7d0837e819
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
RSP: 002b:00007f7d091d8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007f7d08535fa0 RCX: 00007f7d0837e819
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f7d091d8090 R08: fffffbffa003e45c R09: 0700000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007f7d08535fa0 R15: 00007ffcfb862a38
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..