erofs: (device loop2): mounted with root inode @ nid 36.
erofs: (device loop2): z_erofs_readahead: readahead error at page 6 @ nid 89
erofs: (device loop2): z_erofs_readahead: readahead error at page 5 @ nid 89
erofs: (device loop2): z_erofs_readahead: readahead error at page 4 @ nid 89
erofs: (device loop2): z_erofs_readahead: readahead error at page 3 @ nid 89
erofs: (device loop2): z_erofs_readahead: readahead error at page 2 @ nid 89
erofs: (device loop2): z_erofs_get_extent_compressedlen: cannot found CBLKCNT @ lcn 1 of nid 89
erofs: (device loop2): z_erofs_readahead: readahead error at page 1 @ nid 89
BUG: scheduling while atomic: syz.2.17/391/0x00000002
Modules linked in:
Preemption disabled at:
[<ffffffff8215939c>] kmap_atomic include/linux/highmem.h:156 [inline]
[<ffffffff8215939c>] z_erofs_reload_indexes+0x1cc/0x450 fs/erofs/zmap.c:132
CPU: 0 PID: 391 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 dump_stack+0x15/0x1c lib/dump_stack.c:135
 __schedule_bug+0x183/0x240 kernel/sched/core.c:4545
 schedule_debug kernel/sched/core.c:4572 [inline]
 __schedule+0xcee/0x13e0 kernel/sched/core.c:4700
 schedule+0x13c/0x1d0 kernel/sched/core.c:4884
 io_schedule+0x84/0xe0 kernel/sched/core.c:6593
 wait_on_page_bit_common+0x812/0xa80 mm/filemap.c:1282
 wait_on_page_bit_killable mm/filemap.c:1350 [inline]
 wait_on_page_locked_killable include/linux/pagemap.h:679 [inline]
 generic_file_buffered_read+0x92b/0x26d0 mm/filemap.c:2284
 generic_file_read_iter+0x10b/0x580 mm/filemap.c:2568
 call_read_iter include/linux/fs.h:2060 [inline]
 new_sync_read fs/read_write.c:415 [inline]
 vfs_read+0x62a/0xa50 fs/read_write.c:496
 ksys_read+0x14a/0x260 fs/read_write.c:634
 __do_sys_read fs/read_write.c:644 [inline]
 __se_sys_read fs/read_write.c:642 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:642
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f3d87319e99
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
RSP: 002b:00007ffed44fdc88 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f3d875a1fa0 RCX: 00007f3d87319e99
RDX: 0000000000002020 RSI: 0000200000000940 RDI: 0000000000000004
RBP: 00007f3d873afeaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3d875a1fac R14: 00007f3d875a1fa0 R15: 00007f3d875a1fa0