BUG: Bad page state in process syz.3.347 pfn:77aa8
page:ffffea0001deaa00 refcount:0 mapcount:0 mapping:ffff888059749278 index:0x2 pfn:0x77aa8
aops:z_erofs_cache_aops ino:0
flags: 0xfff00000008000(private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000008000 dead000000000100 dead000000000122 ffff888059749278
raw: 0000000000000002 ffff88805973c1a8 00000000ffffffff 0000000000000000
page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x192840(GFP_NOWAIT|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 8109, tgid 8106 (syz.3.347), ts 258911128437, free_ts 258298104908
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554
prep_new_page mm/page_alloc.c:1561 [inline]
get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191
__alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457
z_erofs_bind_cache fs/erofs/zdata.c:605 [inline]
z_erofs_pcluster_begin fs/erofs/zdata.c:889 [inline]
z_erofs_do_read_page+0x20c0/0x3680 fs/erofs/zdata.c:1024
z_erofs_readahead+0x862/0xd50 fs/erofs/zdata.c:1895
read_pages+0x177/0x840 mm/readahead.c:160
page_cache_ra_unbounded+0x692/0x770 mm/readahead.c:269
do_page_cache_ra mm/readahead.c:299 [inline]
force_page_cache_ra+0x2c1/0x320 mm/readahead.c:330
force_page_cache_readahead mm/internal.h:175 [inline]
generic_fadvise+0x44f/0x730 mm/fadvise.c:106
vfs_fadvise mm/fadvise.c:185 [inline]
ksys_fadvise64_64 mm/fadvise.c:199 [inline]
__do_sys_fadvise64 mm/fadvise.c:214 [inline]
__se_sys_fadvise64 mm/fadvise.c:212 [inline]
__x64_sys_fadvise64+0x140/0x180 mm/fadvise.c:212
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1154 [inline]
free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429
vfree+0x1a6/0x320 mm/vmalloc.c:2868
delayed_vfree_work+0x55/0x80 mm/vmalloc.c:2788
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Modules linked in:
CPU: 0 PID: 8113 Comm: syz.3.347 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
bad_page+0x14b/0x170 mm/page_alloc.c:512
free_page_is_bad mm/page_alloc.c:961 [inline]
free_pages_prepare mm/page_alloc.c:1146 [inline]
free_unref_page_prepare+0x887/0x8e0 mm/page_alloc.c:2336
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429
pickup_page_for_submission fs/erofs/zdata.c:1540 [inline]
z_erofs_submit_queue fs/erofs/zdata.c:1710 [inline]
z_erofs_runqueue+0xc79/0x19d0 fs/erofs/zdata.c:1771
z_erofs_read_folio+0x2ed/0x540 fs/erofs/zdata.c:1859
filemap_read_folio+0x167/0x760 mm/filemap.c:2420
do_read_cache_folio+0x470/0x7e0 mm/filemap.c:3804
erofs_bread+0x16f/0x630 fs/erofs/data.c:48
erofs_find_target_block fs/erofs/namei.c:103 [inline]
erofs_namei+0x28c/0xf00 fs/erofs/namei.c:177
erofs_lookup+0x135/0x310 fs/erofs/namei.c:206
__lookup_slow+0x281/0x3b0 fs/namei.c:1702
lookup_slow+0x53/0x70 fs/namei.c:1719
walk_component+0x2be/0x3f0 fs/namei.c:2010
lookup_last fs/namei.c:2467 [inline]
path_lookupat+0x169/0x440 fs/namei.c:2491
filename_lookup+0x1f4/0x510 fs/namei.c:2520
user_path_at_empty+0x42/0x60 fs/namei.c:2917
user_path_at include/linux/namei.h:57 [inline]
__do_sys_chdir fs/open.c:551 [inline]
__se_sys_chdir+0x95/0x290 fs/open.c:545
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff0e278f749
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:00007ff0e353e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007ff0e29e6090 RCX: 00007ff0e278f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000080
RBP: 00007ff0e2813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff0e29e6128 R14: 00007ff0e29e6090 R15: 00007ffc003bf038
BUG: Bad page state in process syz.3.347 pfn:75c34
page:ffffea0001d70d00 refcount:0 mapcount:0 mapping:ffff888059749278 index:0x3 pfn:0x75c34
aops:z_erofs_cache_aops ino:0
flags: 0xfff00000008000(private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000008000 dead000000000100 dead000000000122 ffff888059749278
raw: 0000000000000003 ffff88805973c1a8 00000000ffffffff 0000000000000000
page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x192840(GFP_NOWAIT|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 8109, tgid 8106 (syz.3.347), ts 258911147083, free_ts 258298091152
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554
prep_new_page mm/page_alloc.c:1561 [inline]
get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191
__alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457
z_erofs_bind_cache fs/erofs/zdata.c:605 [inline]
z_erofs_pcluster_begin fs/erofs/zdata.c:889 [inline]
z_erofs_do_read_page+0x20c0/0x3680 fs/erofs/zdata.c:1024
z_erofs_readahead+0x862/0xd50 fs/erofs/zdata.c:1895
read_pages+0x177/0x840 mm/readahead.c:160
page_cache_ra_unbounded+0x692/0x770 mm/readahead.c:269
do_page_cache_ra mm/readahead.c:299 [inline]
force_page_cache_ra+0x2c1/0x320 mm/readahead.c:330
force_page_cache_readahead mm/internal.h:175 [inline]
generic_fadvise+0x44f/0x730 mm/fadvise.c:106
vfs_fadvise mm/fadvise.c:185 [inline]
ksys_fadvise64_64 mm/fadvise.c:199 [inline]
__do_sys_fadvise64 mm/fadvise.c:214 [inline]
__se_sys_fadvise64 mm/fadvise.c:212 [inline]
__x64_sys_fadvise64+0x140/0x180 mm/fadvise.c:212
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1154 [inline]
free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429
vfree+0x1a6/0x320 mm/vmalloc.c:2868
delayed_vfree_work+0x55/0x80 mm/vmalloc.c:2788
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Modules linked in:
CPU: 1 PID: 8113 Comm: syz.3.347 Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
bad_page+0x14b/0x170 mm/page_alloc.c:512
free_page_is_bad mm/page_alloc.c:961 [inline]
free_pages_prepare mm/page_alloc.c:1146 [inline]
free_unref_page_prepare+0x887/0x8e0 mm/page_alloc.c:2336
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429
pickup_page_for_submission fs/erofs/zdata.c:1540 [inline]
z_erofs_submit_queue fs/erofs/zdata.c:1710 [inline]
z_erofs_runqueue+0xc79/0x19d0 fs/erofs/zdata.c:1771
z_erofs_read_folio+0x2ed/0x540 fs/erofs/zdata.c:1859
filemap_read_folio+0x167/0x760 mm/filemap.c:2420
do_read_cache_folio+0x470/0x7e0 mm/filemap.c:3804
erofs_bread+0x16f/0x630 fs/erofs/data.c:48
erofs_find_target_block fs/erofs/namei.c:103 [inline]
erofs_namei+0x28c/0xf00 fs/erofs/namei.c:177
erofs_lookup+0x135/0x310 fs/erofs/namei.c:206
__lookup_slow+0x281/0x3b0 fs/namei.c:1702
lookup_slow+0x53/0x70 fs/namei.c:1719
walk_component+0x2be/0x3f0 fs/namei.c:2010
lookup_last fs/namei.c:2467 [inline]
path_lookupat+0x169/0x440 fs/namei.c:2491
filename_lookup+0x1f4/0x510 fs/namei.c:2520
user_path_at_empty+0x42/0x60 fs/namei.c:2917
user_path_at include/linux/namei.h:57 [inline]
__do_sys_chdir fs/open.c:551 [inline]
__se_sys_chdir+0x95/0x290 fs/open.c:545
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff0e278f749
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:00007ff0e353e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007ff0e29e6090 RCX: 00007ff0e278f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000080
RBP: 00007ff0e2813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff0e29e6128 R14: 00007ff0e29e6090 R15: 00007ffc003bf038
BUG: Bad page state in process syz.3.347 pfn:68ea5
page:ffffea0001a3a940 refcount:0 mapcount:0 mapping:ffff888059749278 index:0x4 pfn:0x68ea5
aops:z_erofs_cache_aops ino:0
flags: 0xfff00000008000(private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000008000 dead000000000100 dead000000000122 ffff888059749278
raw: 0000000000000004 ffff88805973c1a8 00000000ffffffff 0000000000000000
page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x192840(GFP_NOWAIT|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 8109, tgid 8106 (syz.3.347), ts 258911165471, free_ts 258298074109
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554
prep_new_page mm/page_alloc.c:1561 [inline]
get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191
__alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457
z_erofs_bind_cache fs/erofs/zdata.c:605 [inline]
z_erofs_pcluster_begin fs/erofs/zdata.c:889 [inline]
z_erofs_do_read_page+0x20c0/0x3680 fs/erofs/zdata.c:1024
z_erofs_readahead+0x862/0xd50 fs/erofs/zdata.c:1895
read_pages+0x177/0x840 mm/readahead.c:160
page_cache_ra_unbounded+0x692/0x770 mm/readahead.c:269
do_page_cache_ra mm/readahead.c:299 [inline]
force_page_cache_ra+0x2c1/0x320 mm/readahead.c:330
force_page_cache_readahead mm/internal.h:175 [inline]
generic_fadvise+0x44f/0x730 mm/fadvise.c:106
vfs_fadvise mm/fadvise.c:185 [inline]
ksys_fadvise64_64 mm/fadvise.c:199 [inline]
__do_sys_fadvise64 mm/fadvise.c:214 [inline]
__se_sys_fadvise64 mm/fadvise.c:212 [inline]
__x64_sys_fadvise64+0x140/0x180 mm/fadvise.c:212
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1154 [inline]
free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429
vfree+0x1a6/0x320 mm/vmalloc.c:2868
delayed_vfree_work+0x55/0x80 mm/vmalloc.c:2788
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Modules linked in:
CPU: 1 PID: 8113 Comm: syz.3.347 Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
bad_page+0x14b/0x170 mm/page_alloc.c:512
free_page_is_bad mm/page_alloc.c:961 [inline]
free_pages_prepare mm/page_alloc.c:1146 [inline]
free_unref_page_prepare+0x887/0x8e0 mm/page_alloc.c:2336
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429
pickup_page_for_submission fs/erofs/zdata.c:1540 [inline]
z_erofs_submit_queue fs/erofs/zdata.c:1710 [inline]
z_erofs_runqueue+0xc79/0x19d0 fs/erofs/zdata.c:1771
z_erofs_read_folio+0x2ed/0x540 fs/erofs/zdata.c:1859
filemap_read_folio+0x167/0x760 mm/filemap.c:2420
do_read_cache_folio+0x470/0x7e0 mm/filemap.c:3804
erofs_bread+0x16f/0x630 fs/erofs/data.c:48
erofs_find_target_block fs/erofs/namei.c:103 [inline]
erofs_namei+0x28c/0xf00 fs/erofs/namei.c:177
erofs_lookup+0x135/0x310 fs/erofs/namei.c:206
__lookup_slow+0x281/0x3b0 fs/namei.c:1702
lookup_slow+0x53/0x70 fs/namei.c:1719
walk_component+0x2be/0x3f0 fs/namei.c:2010
lookup_last fs/namei.c:2467 [inline]
path_lookupat+0x169/0x440 fs/namei.c:2491
filename_lookup+0x1f4/0x510 fs/namei.c:2520
user_path_at_empty+0x42/0x60 fs/namei.c:2917
user_path_at include/linux/namei.h:57 [inline]
__do_sys_chdir fs/open.c:551 [inline]
__se_sys_chdir+0x95/0x290 fs/open.c:545
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff0e278f749
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:00007ff0e353e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007ff0e29e6090 RCX: 00007ff0e278f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000080
RBP: 00007ff0e2813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff0e29e6128 R14: 00007ff0e29e6090 R15: 00007ffc003bf038
syz.3.347: attempt to access beyond end of device
loop3: rw=0, sector=8, nr_sectors = 32 limit=16