erofs: (device loop0): z_erofs_readahead: readahead error at page 49 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 48 @ nid 36 erofs: (device loop0): z_erofs_extent_lookback: bogus lookback distance @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 47 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 46 @ nid 36 BUG: sleeping function called from invalid context at include/linux/sched/mm.h:209 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4894, name: syz.0.122 1 lock held by syz.0.122/4894: #0: ffff888072fc4320 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] #0: ffff888072fc4320 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x198/0x940 mm/readahead.c:195 Preemption disabled at: [] kmap_atomic include/linux/highmem-internal.h:196 [inline] [] z_erofs_reload_indexes+0x1c2/0x590 fs/erofs/zmap.c:130 CPU: 1 PID: 4894 Comm: syz.0.122 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 ___might_sleep+0x493/0x610 kernel/sched/core.c:9658 might_alloc include/linux/sched/mm.h:209 [inline] slab_pre_alloc_hook+0x42/0xc0 mm/slab.h:492 slab_alloc_node mm/slub.c:3139 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x3d/0x290 mm/slub.c:3238 kmem_cache_zalloc include/linux/slab.h:728 [inline] z_erofs_alloc_pcluster fs/erofs/zdata.c:74 [inline] z_erofs_register_collection fs/erofs/zdata.c:480 [inline] z_erofs_collector_begin fs/erofs/zdata.c:557 [inline] z_erofs_do_read_page+0x6c1/0x26c0 fs/erofs/zdata.c:693 z_erofs_readahead+0x85d/0x1140 fs/erofs/zdata.c:1449 read_pages+0x175/0x930 mm/readahead.c:130 page_cache_ra_unbounded+0x838/0x940 mm/readahead.c:239 do_page_cache_ra mm/readahead.c:269 [inline] force_page_cache_ra+0x3e5/0x440 mm/readahead.c:301 force_page_cache_readahead mm/internal.h:78 [inline] generic_fadvise+0x530/0x7f0 mm/fadvise.c:107 vfs_fadvise mm/fadvise.c:186 [inline] ksys_fadvise64_64 mm/fadvise.c:200 [inline] __do_sys_fadvise64 mm/fadvise.c:215 [inline] __se_sys_fadvise64 mm/fadvise.c:213 [inline] __x64_sys_fadvise64+0x139/0x180 mm/fadvise.c:213 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7ff3d3bbccb9 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:00007ff3d1e18028 EFLAGS: 00000246 ORIG_RAX: 00000000000000dd RAX: ffffffffffffffda RBX: 00007ff3d3e37fa0 RCX: 00007ff3d3bbccb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007ff3d3c2abf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff3d3e38038 R14: 00007ff3d3e37fa0 R15: 00007ffcbc4d7528 erofs: (device loop0): z_erofs_readahead: readahead error at page 44 @ nid 36 erofs: (device loop0): z_erofs_extent_lookback: invalid lookback distance 0 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 43 @ nid 36 erofs: (device loop0): z_erofs_extent_lookback: bogus lookback distance @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 41 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 38 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 37 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 35 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 34 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 33 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 32 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 31 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 29 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 28 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 27 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 26 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 25 @ nid 36 erofs: (device loop0): z_erofs_extent_lookback: bogus lookback distance @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 24 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 23 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 22 @ nid 36 erofs: (device loop0): z_erofs_extent_lookback: bogus lookback distance @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 21 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 20 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 19 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 18 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 17 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 16 @ nid 36 erofs: (device loop0): z_erofs_extent_lookback: bogus lookback distance @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 15 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 14 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 13 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 12 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 9 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 8 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 7 @ nid 36 erofs: (device loop0): z_erofs_extent_lookback: bogus lookback distance @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 6 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 5 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 4 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 3 @ nid 36 erofs: (device loop0): z_erofs_extent_lookback: invalid lookback distance 0 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 1 @ nid 36 erofs: (device loop0): z_erofs_extent_lookback: invalid lookback distance 0 @ nid 36 erofs: (device loop0): z_erofs_readahead: readahead error at page 0 @ nid 36 attempt to access beyond end of device loop0: rw=524288, want=720, limit=16 attempt to access beyond end of device loop0: rw=524288, want=525144, limit=16 attempt to access beyond end of device loop0: rw=524288, want=72, limit=16 attempt to access beyond end of device loop0: rw=524288, want=1183600, limit=16 attempt to access beyond end of device loop0: rw=524288, want=296, limit=16 attempt to access beyond end of device loop0: rw=524288, want=1048976, limit=16 attempt to access beyond end of device loop0: rw=524288, want=3670472, limit=16 attempt to access beyond end of device loop0: rw=524288, want=790384, limit=16 BUG: scheduling while atomic: syz.0.122/4894/0x00000005 no locks held by syz.0.122/4894. Modules linked in: Preemption disabled at: [] kmap_atomic include/linux/highmem-internal.h:196 [inline] [] z_erofs_reload_indexes+0x1c2/0x590 fs/erofs/zmap.c:130