BUG: Bad page state in process jfsCommit  pfn:242c8
page:ffffea000090b200 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2c pfn:0x242c8
flags: 0xfff00000002007(locked|referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002007 dead000000000100 dead000000000122 0000000000000000
raw: 000000000000002c ffff88806247ae88 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 5028, tgid 5026 (syz.0.164), ts 124416999316, free_ts 124398874556
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2559
 prep_new_page mm/page_alloc.c:2566 [inline]
 get_page_from_freelist+0x1a1e/0x1ab0 mm/page_alloc.c:4357
 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5657
 folio_alloc+0x1c/0x60 mm/mempolicy.c:2292
 filemap_alloc_folio+0xdb/0x480 mm/filemap.c:999
 __filemap_get_folio+0x6ab/0xdb0 mm/filemap.c:1993
 pagecache_get_page+0x26/0x250 mm/folio-compat.c:110
 find_or_create_page include/linux/pagemap.h:648 [inline]
 grab_cache_page include/linux/pagemap.h:780 [inline]
 __get_metapage+0x2a4/0xfa0 fs/jfs/jfs_metapage.c:613
 dtSplitRoot+0x1de/0x14e0 fs/jfs/jfs_dtree.c:1910
 dtSplitUp fs/jfs/jfs_dtree.c:993 [inline]
 dtInsert+0xe7b/0x5950 fs/jfs/jfs_dtree.c:871
 jfs_symlink+0x8b2/0xfb0 fs/jfs/namei.c:1019
 vfs_symlink+0x247/0x3d0 fs/namei.c:4479
 do_symlinkat+0x1b6/0x400 fs/namei.c:4508
 __do_sys_symlink fs/namei.c:4530 [inline]
 __se_sys_symlink fs/namei.c:4528 [inline]
 __x64_sys_symlink+0x7a/0x90 fs/namei.c:4528
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/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:1486 [inline]
 free_pcp_prepare mm/page_alloc.c:1536 [inline]
 free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3413
 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3554
 release_pages+0x1fa6/0x2220 mm/swap.c:1035
 __pagevec_release+0x6d/0xe0 mm/swap.c:1055
 pagevec_release include/linux/pagevec.h:71 [inline]
 folio_batch_release include/linux/pagevec.h:135 [inline]
 truncate_inode_pages_range+0x352/0x1090 mm/truncate.c:397
 kill_bdev block/bdev.c:76 [inline]
 blkdev_flush_mapping+0x12c/0x290 block/bdev.c:681
 blkdev_put_whole block/bdev.c:712 [inline]
 blkdev_put+0x47f/0x710 block/bdev.c:972
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x42c/0x4b0 fs/namespace.c:1191
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 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:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
Modules linked in:
CPU: 0 PID: 107 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
 bad_page+0x14b/0x170 mm/page_alloc.c:726
 free_page_is_bad mm/page_alloc.c:1318 [inline]
 free_pages_prepare mm/page_alloc.c:1479 [inline]
 free_pcp_prepare mm/page_alloc.c:1536 [inline]
 free_unref_page_prepare+0x42a/0x9a0 mm/page_alloc.c:3413
 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3508
 txUnlock+0x27e/0xcb0 fs/jfs/jfs_txnmgr.c:933
 txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
 jfs_lazycommit+0x56a/0xa70 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
page:ffffea000090b200 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2c pfn:0x242c8
flags: 0xfff00000002007(locked|referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002007 dead000000000100 dead000000000122 0000000000000000
raw: 000000000000002c ffff88806247ae88 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 5028, tgid 5026 (syz.0.164), ts 124416999316, free_ts 124398874556
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2559
 prep_new_page mm/page_alloc.c:2566 [inline]
 get_page_from_freelist+0x1a1e/0x1ab0 mm/page_alloc.c:4357
 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5657
 folio_alloc+0x1c/0x60 mm/mempolicy.c:2292
 filemap_alloc_folio+0xdb/0x480 mm/filemap.c:999
 __filemap_get_folio+0x6ab/0xdb0 mm/filemap.c:1993
 pagecache_get_page+0x26/0x250 mm/folio-compat.c:110
 find_or_create_page include/linux/pagemap.h:648 [inline]
 grab_cache_page include/linux/pagemap.h:780 [inline]
 __get_metapage+0x2a4/0xfa0 fs/jfs/jfs_metapage.c:613
 dtSplitRoot+0x1de/0x14e0 fs/jfs/jfs_dtree.c:1910
 dtSplitUp fs/jfs/jfs_dtree.c:993 [inline]
 dtInsert+0xe7b/0x5950 fs/jfs/jfs_dtree.c:871
 jfs_symlink+0x8b2/0xfb0 fs/jfs/namei.c:1019
 vfs_symlink+0x247/0x3d0 fs/namei.c:4479
 do_symlinkat+0x1b6/0x400 fs/namei.c:4508
 __do_sys_symlink fs/namei.c:4530 [inline]
 __se_sys_symlink fs/namei.c:4528 [inline]
 __x64_sys_symlink+0x7a/0x90 fs/namei.c:4528
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/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:1486 [inline]
 free_pcp_prepare mm/page_alloc.c:1536 [inline]
 free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3413
 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3554
 release_pages+0x1fa6/0x2220 mm/swap.c:1035
 __pagevec_release+0x6d/0xe0 mm/swap.c:1055
 pagevec_release include/linux/pagevec.h:71 [inline]
 folio_batch_release include/linux/pagevec.h:135 [inline]
 truncate_inode_pages_range+0x352/0x1090 mm/truncate.c:397
 kill_bdev block/bdev.c:76 [inline]
 blkdev_flush_mapping+0x12c/0x290 block/bdev.c:681
 blkdev_put_whole block/bdev.c:712 [inline]
 blkdev_put+0x47f/0x710 block/bdev.c:972
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x42c/0x4b0 fs/namespace.c:1191
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 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:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1146!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 107 Comm: jfsCommit Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:folio_get include/linux/mm.h:1146 [inline]
RIP: 0010:get_page include/linux/mm.h:1152 [inline]
RIP: 0010:put_metapage+0x24f/0x340 fs/jfs/jfs_metapage.c:721
Code: 38 c1 0f 8c 32 ff ff ff 4c 89 ef e8 1b b7 e0 fe e9 25 ff ff ff e8 e1 aa 8f fe 48 8b 3c 24 48 c7 c6 40 32 c6 8a e8 41 ca ca fe <0f> 0b 4c 8b 2c 24 4c 89 ee 48 81 e6 ff 0f 00 00 31 ff e8 9a ae 8f
RSP: 0018:ffffc90002d17ce0 EFLAGS: 00010246
RAX: b10d34d5485ffe00 RBX: ffff88806247ae88 RCX: b10d34d5485ffe00
RDX: 0000000000000000 RSI: ffffffff8adf1380 RDI: ffffffff8adf1340
RBP: 000000000000007f R08: ffffffff8e1ff42f R09: 1ffffffff1c3fe85
R10: dffffc0000000000 R11: fffffbfff1c3fe86 R12: ffff88806247aeb0
R13: ffffea000090b234 R14: 1ffff1100c48f5d6 R15: 1ffff1100c48f5e3
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555564c739e8 CR3: 000000002f9f0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 txUnlock+0x427/0xcb0 fs/jfs/jfs_txnmgr.c:948
 txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
 jfs_lazycommit+0x56a/0xa70 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_get include/linux/mm.h:1146 [inline]
RIP: 0010:get_page include/linux/mm.h:1152 [inline]
RIP: 0010:put_metapage+0x24f/0x340 fs/jfs/jfs_metapage.c:721
Code: 38 c1 0f 8c 32 ff ff ff 4c 89 ef e8 1b b7 e0 fe e9 25 ff ff ff e8 e1 aa 8f fe 48 8b 3c 24 48 c7 c6 40 32 c6 8a e8 41 ca ca fe <0f> 0b 4c 8b 2c 24 4c 89 ee 48 81 e6 ff 0f 00 00 31 ff e8 9a ae 8f
RSP: 0018:ffffc90002d17ce0 EFLAGS: 00010246
RAX: b10d34d5485ffe00 RBX: ffff88806247ae88 RCX: b10d34d5485ffe00
RDX: 0000000000000000 RSI: ffffffff8adf1380 RDI: ffffffff8adf1340
RBP: 000000000000007f R08: ffffffff8e1ff42f R09: 1ffffffff1c3fe85
R10: dffffc0000000000 R11: fffffbfff1c3fe86 R12: ffff88806247aeb0
R13: ffffea000090b234 R14: 1ffff1100c48f5d6 R15: 1ffff1100c48f5e3
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555564c739e8 CR3: 000000007d2d5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400