BUG: Bad page state in process syz-executor pfn:64b54
page:ffffea000192d500 refcount:0 mapcount:0 mapping:ffff88805ca487c8 index:0x2 pfn:0x64b54
aops:z_erofs_cache_aops ino:0
flags: 0xfff00000000001(locked|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000001 dead000000000100 dead000000000122 ffff88805ca487c8
raw: 0000000000000002 0000000000000000 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 8121, tgid 8119 (syz.2.696), ts 188333367215, free_ts 186113278677
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
prep_new_page mm/page_alloc.c:1588 [inline]
get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
__alloc_pages+0x1f0/0x460 mm/page_alloc.c:4486
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+0x2181/0x36b0 fs/erofs/zdata.c:1024
z_erofs_readahead+0x88b/0xda0 fs/erofs/zdata.c:1895
read_pages+0x189/0x850 mm/readahead.c:160
page_cache_ra_unbounded+0x68a/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+0x47e/0x780 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:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
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:1181 [inline]
free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
vfree+0x1a6/0x320 mm/vmalloc.c:2868
nilfs_ioctl_set_suinfo fs/nilfs2/ioctl.c:1265 [inline]
nilfs_ioctl+0x1f34/0x21a0 fs/nilfs2/ioctl.c:1294
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Modules linked in:
CPU: 0 PID: 5772 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
bad_page+0x14b/0x170 mm/page_alloc.c:539
free_page_is_bad mm/page_alloc.c:988 [inline]
free_pages_prepare mm/page_alloc.c:1173 [inline]
free_unref_page_prepare+0x85f/0x8c0 mm/page_alloc.c:2365
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
detach_page_private include/linux/pagemap.h:539 [inline]
erofs_try_to_free_all_cached_pages+0x295/0x5f0 fs/erofs/zdata.c:657
erofs_try_to_release_workgroup fs/erofs/utils.c:132 [inline]
erofs_shrink_workstation+0x11f/0x290 fs/erofs/utils.c:161
erofs_shrinker_unregister+0x5d/0x170 fs/erofs/utils.c:198
erofs_put_super+0x4e/0x150 fs/erofs/super.c:812
generic_shutdown_super+0x134/0x2b0 fs/super.c:693
kill_block_super+0x44/0x90 fs/super.c:1660
erofs_kill_sb+0x4c/0x140 fs/erofs/super.c:794
deactivate_locked_super+0x97/0x100 fs/super.c:481
cleanup_mnt+0x43b/0x4d0 fs/namespace.c:1259
task_work_run+0x1d4/0x260 kernel/task_work.c:245
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f27a279d897
Code: a2 c7 05 5c ee 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff09b30b88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f27a2831ef0 RCX: 00007f27a279d897
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff09b30c40
RBP: 00007fff09b30c40 R08: 00007fff09b31c40 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff09b31cd0
R13: 00007f27a2831ef0 R14: 000000000002e046 R15: 00007fff09b31d10
BUG: Bad page state in process syz-executor pfn:5eabd
page:ffffea00017aaf40 refcount:0 mapcount:0 mapping:ffff88805ca487c8 index:0x3 pfn:0x5eabd
aops:z_erofs_cache_aops ino:0
flags: 0xfff00000000001(locked|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000001 dead000000000100 dead000000000122 ffff88805ca487c8
raw: 0000000000000003 0000000000000000 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 8121, tgid 8119 (syz.2.696), ts 188333386102, free_ts 186113263945
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
prep_new_page mm/page_alloc.c:1588 [inline]
get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
__alloc_pages+0x1f0/0x460 mm/page_alloc.c:4486
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+0x2181/0x36b0 fs/erofs/zdata.c:1024
z_erofs_readahead+0x88b/0xda0 fs/erofs/zdata.c:1895
read_pages+0x189/0x850 mm/readahead.c:160
page_cache_ra_unbounded+0x68a/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+0x47e/0x780 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:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
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:1181 [inline]
free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
vfree+0x1a6/0x320 mm/vmalloc.c:2868
nilfs_ioctl_set_suinfo fs/nilfs2/ioctl.c:1265 [inline]
nilfs_ioctl+0x1f34/0x21a0 fs/nilfs2/ioctl.c:1294
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Modules linked in:
CPU: 0 PID: 5772 Comm: syz-executor Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
bad_page+0x14b/0x170 mm/page_alloc.c:539
free_page_is_bad mm/page_alloc.c:988 [inline]
free_pages_prepare mm/page_alloc.c:1173 [inline]
free_unref_page_prepare+0x85f/0x8c0 mm/page_alloc.c:2365
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
detach_page_private include/linux/pagemap.h:539 [inline]
erofs_try_to_free_all_cached_pages+0x295/0x5f0 fs/erofs/zdata.c:657
erofs_try_to_release_workgroup fs/erofs/utils.c:132 [inline]
erofs_shrink_workstation+0x11f/0x290 fs/erofs/utils.c:161
erofs_shrinker_unregister+0x5d/0x170 fs/erofs/utils.c:198
erofs_put_super+0x4e/0x150 fs/erofs/super.c:812
generic_shutdown_super+0x134/0x2b0 fs/super.c:693
kill_block_super+0x44/0x90 fs/super.c:1660
erofs_kill_sb+0x4c/0x140 fs/erofs/super.c:794
deactivate_locked_super+0x97/0x100 fs/super.c:481
cleanup_mnt+0x43b/0x4d0 fs/namespace.c:1259
task_work_run+0x1d4/0x260 kernel/task_work.c:245
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f27a279d897
Code: a2 c7 05 5c ee 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff09b30b88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f27a2831ef0 RCX: 00007f27a279d897
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff09b30c40
RBP: 00007fff09b30c40 R08: 00007fff09b31c40 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff09b31cd0
R13: 00007f27a2831ef0 R14: 000000000002e046 R15: 00007fff09b31d10
BUG: Bad page state in process syz-executor pfn:5eabc
page:ffffea00017aaf00 refcount:0 mapcount:0 mapping:ffff88805ca487c8 index:0x4 pfn:0x5eabc
aops:z_erofs_cache_aops ino:0
flags: 0xfff00000000001(locked|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000001 dead000000000100 dead000000000122 ffff88805ca487c8
raw: 0000000000000004 0000000000000000 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 8121, tgid 8119 (syz.2.696), ts 188333404576, free_ts 186113250746
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
prep_new_page mm/page_alloc.c:1588 [inline]
get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
__alloc_pages+0x1f0/0x460 mm/page_alloc.c:4486
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+0x2181/0x36b0 fs/erofs/zdata.c:1024
z_erofs_readahead+0x88b/0xda0 fs/erofs/zdata.c:1895
read_pages+0x189/0x850 mm/readahead.c:160
page_cache_ra_unbounded+0x68a/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+0x47e/0x780 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:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
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:1181 [inline]
free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
vfree+0x1a6/0x320 mm/vmalloc.c:2868
nilfs_ioctl_set_suinfo fs/nilfs2/ioctl.c:1265 [inline]
nilfs_ioctl+0x1f34/0x21a0 fs/nilfs2/ioctl.c:1294
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Modules linked in:
CPU: 0 PID: 5772 Comm: syz-executor Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
bad_page+0x14b/0x170 mm/page_alloc.c:539
free_page_is_bad mm/page_alloc.c:988 [inline]
free_pages_prepare mm/page_alloc.c:1173 [inline]
free_unref_page_prepare+0x85f/0x8c0 mm/page_alloc.c:2365
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
detach_page_private include/linux/pagemap.h:539 [inline]
erofs_try_to_free_all_cached_pages+0x295/0x5f0 fs/erofs/zdata.c:657
erofs_try_to_release_workgroup fs/erofs/utils.c:132 [inline]
erofs_shrink_workstation+0x11f/0x290 fs/erofs/utils.c:161
erofs_shrinker_unregister+0x5d/0x170 fs/erofs/utils.c:198
erofs_put_super+0x4e/0x150 fs/erofs/super.c:812
generic_shutdown_super+0x134/0x2b0 fs/super.c:693
kill_block_super+0x44/0x90 fs/super.c:1660
erofs_kill_sb+0x4c/0x140 fs/erofs/super.c:794
deactivate_locked_super+0x97/0x100 fs/super.c:481
cleanup_mnt+0x43b/0x4d0 fs/namespace.c:1259
task_work_run+0x1d4/0x260 kernel/task_work.c:245
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f27a279d897
Code: a2 c7 05 5c ee 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff09b30b88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f27a2831ef0 RCX: 00007f27a279d897
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff09b30c40
RBP: 00007fff09b30c40 R08: 00007fff09b31c40 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff09b31cd0
R13: 00007f27a2831ef0 R14: 000000000002e046 R15: 00007fff09b31d10