BUG: Bad page state in process jfsCommit  pfn:236b0
page:ffffea00008dac00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x220 pfn:0x236b0
flags: 0xfff1800000820d(locked|referenced|uptodate|workingset|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff1800000820d dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000220 ffff88805bb18aa8 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 5861, tgid 5861 (syz.2.9), ts 73882926096, free_ts 73879089858
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1582
 prep_new_page mm/page_alloc.c:1589 [inline]
 get_page_from_freelist+0x2181/0x22a0 mm/page_alloc.c:3221
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4501
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2289
 filemap_alloc_folio+0xdf/0x490 mm/filemap.c:1004
 __filemap_get_folio+0x3fb/0xbe0 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+0x2ab/0xfa0 fs/jfs/jfs_metapage.c:613
 xtSplitRoot+0x105/0x1000 fs/jfs/jfs_xtree.c:1227
 xtSplitUp+0x35e/0x1f60 fs/jfs/jfs_xtree.c:770
 xtInsert+0x415/0xe80 fs/jfs/jfs_xtree.c:593
 extAlloc+0xac1/0x1010 fs/jfs/jfs_extent.c:150
 jfs_get_block+0x352/0xad0 fs/jfs/inode.c:254
 __block_write_begin_int+0x571/0x1b00 fs/buffer.c:2124
 __block_write_begin fs/buffer.c:2173 [inline]
 block_write_begin+0x9a/0x1e0 fs/buffer.c:2234
 jfs_write_begin+0x35/0x70 fs/jfs/inode.c:305
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1182 [inline]
 free_unref_page_prepare+0x7d7/0x8f0 mm/page_alloc.c:2366
 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2459
 tlb_batch_list_free mm/mmu_gather.c:115 [inline]
 tlb_finish_mmu+0x13e/0x220 mm/mmu_gather.c:428
 unmap_region+0x311/0x370 mm/mmap.c:2349
 do_vmi_align_munmap+0x1057/0x16a0 mm/mmap.c:2592
 do_vmi_munmap+0x252/0x2d0 mm/mmap.c:2660
 __vm_munmap+0x19e/0x3c0 mm/mmap.c:2961
 __do_sys_munmap mm/mmap.c:2978 [inline]
 __se_sys_munmap mm/mmap.c:2975 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:2975
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
Modules linked in:
CPU: 1 PID: 113 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 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+0x884/0x8f0 mm/page_alloc.c:2366
 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2459
 txUnlock+0x275/0xcb0 fs/jfs/jfs_txnmgr.c:933
 txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
 jfs_lazycommit+0x58c/0xaa0 fs/jfs/jfs_txnmgr.c:2733
 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
 </TASK>
page:ffffea00008dac00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x220 pfn:0x236b0
flags: 0xfff1800000820d(locked|referenced|uptodate|workingset|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff1800000820d dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000220 ffff88805bb18aa8 00000000ffffffff 0000000000000000
page dumped because: VM_BUG_ON_FOLIO(((unsigned int) folio_ref_count(folio) + 127u <= 127u))
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 5861, tgid 5861 (syz.2.9), ts 73882926096, free_ts 73879089858
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1582
 prep_new_page mm/page_alloc.c:1589 [inline]
 get_page_from_freelist+0x2181/0x22a0 mm/page_alloc.c:3221
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4501
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2289
 filemap_alloc_folio+0xdf/0x490 mm/filemap.c:1004
 __filemap_get_folio+0x3fb/0xbe0 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+0x2ab/0xfa0 fs/jfs/jfs_metapage.c:613
 xtSplitRoot+0x105/0x1000 fs/jfs/jfs_xtree.c:1227
 xtSplitUp+0x35e/0x1f60 fs/jfs/jfs_xtree.c:770
 xtInsert+0x415/0xe80 fs/jfs/jfs_xtree.c:593
 extAlloc+0xac1/0x1010 fs/jfs/jfs_extent.c:150
 jfs_get_block+0x352/0xad0 fs/jfs/inode.c:254
 __block_write_begin_int+0x571/0x1b00 fs/buffer.c:2124
 __block_write_begin fs/buffer.c:2173 [inline]
 block_write_begin+0x9a/0x1e0 fs/buffer.c:2234
 jfs_write_begin+0x35/0x70 fs/jfs/inode.c:305
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1182 [inline]
 free_unref_page_prepare+0x7d7/0x8f0 mm/page_alloc.c:2366
 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2459
 tlb_batch_list_free mm/mmu_gather.c:115 [inline]
 tlb_finish_mmu+0x13e/0x220 mm/mmu_gather.c:428
 unmap_region+0x311/0x370 mm/mmap.c:2349
 do_vmi_align_munmap+0x1057/0x16a0 mm/mmap.c:2592
 do_vmi_munmap+0x252/0x2d0 mm/mmap.c:2660
 __vm_munmap+0x19e/0x3c0 mm/mmap.c:2961
 __do_sys_munmap mm/mmap.c:2978 [inline]
 __se_sys_munmap mm/mmap.c:2975 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:2975
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1458!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 113 Comm: jfsCommit Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:folio_get include/linux/mm.h:1458 [inline]
RIP: 0010:get_page include/linux/mm.h:1464 [inline]
RIP: 0010:put_metapage+0x248/0x330 fs/jfs/jfs_metapage.c:750
Code: 38 c1 0f 8c 31 ff ff ff 4c 89 ef e8 82 0e d9 fe e9 24 ff ff ff e8 78 82 80 fe 48 8b 3c 24 48 c7 c6 c0 ff 03 8b e8 18 1b c1 fe <0f> 0b 48 89 ee 48 81 e6 ff 0f 00 00 31 ff e8 95 86 80 fe 48 89 2c
RSP: 0018:ffffc90002cffcd0 EFLAGS: 00010246
RAX: e6752952e3fe0c00 RBX: ffff88805bb18aa8 RCX: e6752952e3fe0c00
RDX: 0000000000000000 RSI: ffffffff8b1d3b80 RDI: ffffffff8b1d3b40
RBP: 000000000000007f R08: ffffffff8e8c316f R09: 1ffffffff1d1862d
R10: dffffc0000000000 R11: fffffbfff1d1862e R12: ffff88805bb18ad0
R13: ffffea00008dac34 R14: 1ffff1100b76315a R15: 1ffff1100b763167
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe17ef2bf0 CR3: 0000000078601000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 txUnlock+0x426/0xcb0 fs/jfs/jfs_txnmgr.c:948
 txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
 jfs_lazycommit+0x58c/0xaa0 fs/jfs/jfs_txnmgr.c:2733
 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
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_get include/linux/mm.h:1458 [inline]
RIP: 0010:get_page include/linux/mm.h:1464 [inline]
RIP: 0010:put_metapage+0x248/0x330 fs/jfs/jfs_metapage.c:750
Code: 38 c1 0f 8c 31 ff ff ff 4c 89 ef e8 82 0e d9 fe e9 24 ff ff ff e8 78 82 80 fe 48 8b 3c 24 48 c7 c6 c0 ff 03 8b e8 18 1b c1 fe <0f> 0b 48 89 ee 48 81 e6 ff 0f 00 00 31 ff e8 95 86 80 fe 48 89 2c
RSP: 0018:ffffc90002cffcd0 EFLAGS: 00010246
RAX: e6752952e3fe0c00 RBX: ffff88805bb18aa8 RCX: e6752952e3fe0c00
RDX: 0000000000000000 RSI: ffffffff8b1d3b80 RDI: ffffffff8b1d3b40
RBP: 000000000000007f R08: ffffffff8e8c316f R09: 1ffffffff1d1862d
R10: dffffc0000000000 R11: fffffbfff1d1862e R12: ffff88805bb18ad0
R13: ffffea00008dac34 R14: 1ffff1100b76315a R15: 1ffff1100b763167
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ce20f484b0 CR3: 000000007a045000 CR4: 00000000003506f0