BUG: Bad page state in process syz.2.417  pfn:2c762
page:ffffea0000b1d880 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2f pfn:0x2c762
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea0001752a48 ffffc90004c5f940 0000000000000000
raw: 000000000000002f ffff888074409e88 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 0x140c40(GFP_NOFS|__GFP_COMP|__GFP_HARDWALL), pid 7648, tgid 7647 (syz.2.417), ts 268477328056, free_ts 268448719808
 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
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2291
 filemap_alloc_folio+0xdf/0x470 mm/filemap.c:1004
 __filemap_get_folio+0x3ee/0xbc0 mm/filemap.c:1962
 pagecache_get_page+0x2a/0x250 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:755 [inline]
 grab_cache_page include/linux/pagemap.h:877 [inline]
 __get_metapage+0x2a8/0xfa0 fs/jfs/jfs_metapage.c:613
 diNewExt+0xa81/0x3120 fs/jfs/jfs_imap.c:2275
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xe7a/0x1de0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1d5/0x1660 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x950 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x191/0xa30 fs/jfs/namei.c:225
 vfs_mkdir+0x296/0x440 fs/namei.c:4113
 do_mkdirat+0x1d4/0x440 fs/namei.c:4136
 __do_sys_mkdirat fs/namei.c:4151 [inline]
 __se_sys_mkdirat fs/namei.c:4149 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149
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_list+0xbe/0x860 mm/page_alloc.c:2475
 release_pages+0x1fa0/0x2220 mm/swap.c:1022
 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
 tlb_flush_mmu+0x368/0x4f0 mm/mmu_gather.c:300
 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:392
 exit_mmap+0x3f0/0xb50 mm/mmap.c:3311
 __mmput+0x118/0x3c0 kernel/fork.c:1355
 exit_mm+0x1da/0x2c0 kernel/exit.c:569
 do_exit+0x88e/0x23c0 kernel/exit.c:870
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
 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
Modules linked in:
CPU: 1 PID: 7672 Comm: syz.2.417 Not tainted 6.6.97-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 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_list+0xbe/0x860 mm/page_alloc.c:2475
 release_pages+0x1fa0/0x2220 mm/swap.c:1022
 __folio_batch_release+0x71/0xe0 mm/swap.c:1042
 folio_batch_release include/linux/pagevec.h:83 [inline]
 truncate_inode_pages_range+0x358/0xf00 mm/truncate.c:371
 jfs_remount+0x33b/0x5b0 fs/jfs/super.c:451
 reconfigure_super+0x21e/0x880 fs/super.c:1151
 do_remount fs/namespace.c:2900 [inline]
 path_mount+0xd19/0xfe0 fs/namespace.c:3685
 do_mount fs/namespace.c:3706 [inline]
 __do_sys_mount fs/namespace.c:3915 [inline]
 __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3892
 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: 0033:0x7ff7fa38e929
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:00007ff7fa1ff038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff7fa5b6160 RCX: 00007ff7fa38e929
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007ff7fa410b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002236824 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff7fa5b6160 R15: 00007ffc3f21c548
 </TASK>
BUG: Bad page state in process syz.2.417  pfn:5d4a9
page:ffffea0001752a40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2e pfn:0x5d4a9
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea0000c15988 ffffc90004c5f940 0000000000000000
raw: 000000000000002e ffff888074409d90 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 0x140c40(GFP_NOFS|__GFP_COMP|__GFP_HARDWALL), pid 7648, tgid 7647 (syz.2.417), ts 268477265796, free_ts 268448741103
 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
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2291
 filemap_alloc_folio+0xdf/0x470 mm/filemap.c:1004
 __filemap_get_folio+0x3ee/0xbc0 mm/filemap.c:1962
 pagecache_get_page+0x2a/0x250 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:755 [inline]
 grab_cache_page include/linux/pagemap.h:877 [inline]
 __get_metapage+0x2a8/0xfa0 fs/jfs/jfs_metapage.c:613
 diNewExt+0xa81/0x3120 fs/jfs/jfs_imap.c:2275
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xe7a/0x1de0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1d5/0x1660 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x950 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x191/0xa30 fs/jfs/namei.c:225
 vfs_mkdir+0x296/0x440 fs/namei.c:4113
 do_mkdirat+0x1d4/0x440 fs/namei.c:4136
 __do_sys_mkdirat fs/namei.c:4151 [inline]
 __se_sys_mkdirat fs/namei.c:4149 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149
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_list+0xbe/0x860 mm/page_alloc.c:2475
 release_pages+0x1fa0/0x2220 mm/swap.c:1022
 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
 tlb_flush_mmu+0x368/0x4f0 mm/mmu_gather.c:300
 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:392
 exit_mmap+0x3f0/0xb50 mm/mmap.c:3311
 __mmput+0x118/0x3c0 kernel/fork.c:1355
 exit_mm+0x1da/0x2c0 kernel/exit.c:569
 do_exit+0x88e/0x23c0 kernel/exit.c:870
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
 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
Modules linked in:
CPU: 0 PID: 7672 Comm: syz.2.417 Tainted: G    B              6.6.97-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 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_list+0xbe/0x860 mm/page_alloc.c:2475
 release_pages+0x1fa0/0x2220 mm/swap.c:1022
 __folio_batch_release+0x71/0xe0 mm/swap.c:1042
 folio_batch_release include/linux/pagevec.h:83 [inline]
 truncate_inode_pages_range+0x358/0xf00 mm/truncate.c:371
 jfs_remount+0x33b/0x5b0 fs/jfs/super.c:451
 reconfigure_super+0x21e/0x880 fs/super.c:1151
 do_remount fs/namespace.c:2900 [inline]
 path_mount+0xd19/0xfe0 fs/namespace.c:3685
 do_mount fs/namespace.c:3706 [inline]
 __do_sys_mount fs/namespace.c:3915 [inline]
 __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3892
 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: 0033:0x7ff7fa38e929
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:00007ff7fa1ff038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff7fa5b6160 RCX: 00007ff7fa38e929
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007ff7fa410b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002236824 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff7fa5b6160 R15: 00007ffc3f21c548
 </TASK>
BUG: Bad page state in process syz.2.417  pfn:30566
page:ffffea0000c15980 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2d pfn:0x30566
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea0001825b88 ffffc90004c5f940 0000000000000000
raw: 000000000000002d ffff888074409c98 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 0x140c40(GFP_NOFS|__GFP_COMP|__GFP_HARDWALL), pid 7648, tgid 7647 (syz.2.417), ts 268477189486, free_ts 268448756508
 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
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2291
 filemap_alloc_folio+0xdf/0x470 mm/filemap.c:1004
 __filemap_get_folio+0x3ee/0xbc0 mm/filemap.c:1962
 pagecache_get_page+0x2a/0x250 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:755 [inline]
 grab_cache_page include/linux/pagemap.h:877 [inline]
 __get_metapage+0x2a8/0xfa0 fs/jfs/jfs_metapage.c:613
 diNewExt+0xa81/0x3120 fs/jfs/jfs_imap.c:2275
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xe7a/0x1de0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1d5/0x1660 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x950 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x191/0xa30 fs/jfs/namei.c:225
 vfs_mkdir+0x296/0x440 fs/namei.c:4113
 do_mkdirat+0x1d4/0x440 fs/namei.c:4136
 __do_sys_mkdirat fs/namei.c:4151 [inline]
 __se_sys_mkdirat fs/namei.c:4149 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149
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_list+0xbe/0x860 mm/page_alloc.c:2475
 release_pages+0x1fa0/0x2220 mm/swap.c:1022
 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
 tlb_flush_mmu+0x368/0x4f0 mm/mmu_gather.c:300
 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:392
 exit_mmap+0x3f0/0xb50 mm/mmap.c:3311
 __mmput+0x118/0x3c0 kernel/fork.c:1355
 exit_mm+0x1da/0x2c0 kernel/exit.c:569
 do_exit+0x88e/0x23c0 kernel/exit.c:870
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
 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
Modules linked in:
CPU: 0 PID: 7672 Comm: syz.2.417 Tainted: G    B              6.6.97-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 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_list+0xbe/0x860 mm/page_alloc.c:2475
 release_pages+0x1fa0/0x2220 mm/swap.c:1022
 __folio_batch_release+0x71/0xe0 mm/swap.c:1042
 folio_batch_release include/linux/pagevec.h:83 [inline]
 truncate_inode_pages_range+0x358/0xf00 mm/truncate.c:371
 jfs_remount+0x33b/0x5b0 fs/jfs/super.c:451
 reconfigure_super+0x21e/0x880 fs/super.c:1151
 do_remount fs/namespace.c:2900 [inline]
 path_mount+0xd19/0xfe0 fs/namespace.c:3685
 do_mount fs/namespace.c:3706 [inline]
 __do_sys_mount fs/namespace.c:3915 [inline]
 __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3892
 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: 0033:0x7ff7fa38e929
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:00007ff7fa1ff038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff7fa5b6160 RCX: 00007ff7fa38e929
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007ff7fa410b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002236824 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff7fa5b6160 R15: 00007ffc3f21c548
 </TASK>