BUG: Bad page state in process jfsCommit  pfn:57eac
page:ffffea00015fab00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x7a5 pfn:0x57eac
flags: 0xfff00000002007(locked|referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002007 dead000000000100 dead000000000122 0000000000000000
raw: 00000000000007a5 ffff8880229b46c8 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 0x100c40(GFP_NOFS|__GFP_HARDWALL), pid 4753, ts 125600529314, free_ts 21592270203
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
 __page_cache_alloc+0xce/0x440 mm/filemap.c:1022
 pagecache_get_page+0x9b6/0xf10 mm/filemap.c:1940
 find_or_create_page include/linux/pagemap.h:420 [inline]
 grab_cache_page include/linux/pagemap.h:502 [inline]
 __get_metapage+0x282/0x1060 fs/jfs/jfs_metapage.c:614
 xtSplitPage+0x238/0x1c50 fs/jfs/jfs_xtree.c:985
 xtSplitUp+0x2b7/0x1c60 fs/jfs/jfs_xtree.c:782
 xtInsert+0x403/0xc50 fs/jfs/jfs_xtree.c:604
 extAlloc+0xa1f/0xf80 fs/jfs/jfs_extent.c:148
 jfs_get_block+0x355/0xad0 fs/jfs/inode.c:264
 get_more_blocks fs/direct-io.c:673 [inline]
 do_direct_IO fs/direct-io.c:959 [inline]
 do_blockdev_direct_IO fs/direct-io.c:1276 [inline]
 __blockdev_direct_IO+0x13d4/0x3a70 fs/direct-io.c:1368
 blockdev_direct_IO include/linux/fs.h:3345 [inline]
 jfs_direct_IO+0x119/0x220 fs/jfs/inode.c:349
 generic_file_direct_write+0x22c/0x490 mm/filemap.c:3687
 __generic_file_write_iter+0x2b1/0x4e0 mm/filemap.c:3869
 generic_file_write_iter+0xa6/0x1b0 mm/filemap.c:3944
 do_iter_readv_writev+0x47e/0x5f0 fs/read_write.c:-1
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396
 free_contig_range+0x96/0xf0 mm/page_alloc.c:9428
 destroy_args+0xf0/0xa00 mm/debug_vm_pgtable.c:1018
 debug_vm_pgtable+0x321/0x380 mm/debug_vm_pgtable.c:1336
 do_one_initcall+0x272/0x730 init/main.c:1316
 do_initcall_level+0x137/0x1f0 init/main.c:1389
 do_initcalls+0x4b/0x90 init/main.c:1405
 kernel_init_freeable+0x3e9/0x570 init/main.c:1629
 kernel_init+0x19/0x1b0 init/main.c:1520
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Modules linked in:
CPU: 0 PID: 275 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 bad_page+0x14b/0x170 mm/page_alloc.c:652
 check_free_page mm/page_alloc.c:1209 [inline]
 free_pages_prepare mm/page_alloc.c:1334 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0x383/0x6c0 mm/page_alloc.c:3317
 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396
 txUnlock+0x27e/0xcb0 fs/jfs/jfs_txnmgr.c:933
 txLazyCommit fs/jfs/jfs_txnmgr.c:2717 [inline]
 jfs_lazycommit+0x581/0xb40 fs/jfs/jfs_txnmgr.c:2767
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
page:ffffea00015fab00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x7a5 pfn:0x57eac
flags: 0xfff00000002007(locked|referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002007 dead000000000100 dead000000000122 0000000000000000
raw: 00000000000007a5 ffff8880229b46c8 00000000ffffffff 0000000000000000
page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x100c40(GFP_NOFS|__GFP_HARDWALL), pid 4753, ts 125600529314, free_ts 21592270203
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
 __page_cache_alloc+0xce/0x440 mm/filemap.c:1022
 pagecache_get_page+0x9b6/0xf10 mm/filemap.c:1940
 find_or_create_page include/linux/pagemap.h:420 [inline]
 grab_cache_page include/linux/pagemap.h:502 [inline]
 __get_metapage+0x282/0x1060 fs/jfs/jfs_metapage.c:614
 xtSplitPage+0x238/0x1c50 fs/jfs/jfs_xtree.c:985
 xtSplitUp+0x2b7/0x1c60 fs/jfs/jfs_xtree.c:782
 xtInsert+0x403/0xc50 fs/jfs/jfs_xtree.c:604
 extAlloc+0xa1f/0xf80 fs/jfs/jfs_extent.c:148
 jfs_get_block+0x355/0xad0 fs/jfs/inode.c:264
 get_more_blocks fs/direct-io.c:673 [inline]
 do_direct_IO fs/direct-io.c:959 [inline]
 do_blockdev_direct_IO fs/direct-io.c:1276 [inline]
 __blockdev_direct_IO+0x13d4/0x3a70 fs/direct-io.c:1368
 blockdev_direct_IO include/linux/fs.h:3345 [inline]
 jfs_direct_IO+0x119/0x220 fs/jfs/inode.c:349
 generic_file_direct_write+0x22c/0x490 mm/filemap.c:3687
 __generic_file_write_iter+0x2b1/0x4e0 mm/filemap.c:3869
 generic_file_write_iter+0xa6/0x1b0 mm/filemap.c:3944
 do_iter_readv_writev+0x47e/0x5f0 fs/read_write.c:-1
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396
 free_contig_range+0x96/0xf0 mm/page_alloc.c:9428
 destroy_args+0xf0/0xa00 mm/debug_vm_pgtable.c:1018
 debug_vm_pgtable+0x321/0x380 mm/debug_vm_pgtable.c:1336
 do_one_initcall+0x272/0x730 init/main.c:1316
 do_initcall_level+0x137/0x1f0 init/main.c:1389
 do_initcalls+0x4b/0x90 init/main.c:1405
 kernel_init_freeable+0x3e9/0x570 init/main.c:1629
 kernel_init+0x19/0x1b0 init/main.c:1520
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1224!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 275 Comm: jfsCommit Tainted: G    B             syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:get_page include/linux/mm.h:1224 [inline]
RIP: 0010:put_metapage+0x278/0x280 fs/jfs/jfs_metapage.c:722
Code: 38 c1 0f 8c 00 ff ff ff 4c 89 ef e8 42 b9 ec fe e9 f3 fe ff ff e8 e8 ad a7 fe 48 8b 3c 24 48 c7 c6 a0 54 62 8a e8 c8 93 da fe <0f> 0b 66 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 70
RSP: 0018:ffffc9000257fce0 EFLAGS: 00010246
RAX: 7d187675b94f3700 RBX: ffff8880229b46c8 RCX: 0000000000000000
RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff520004aff90
RBP: 000000000000007f R08: ffff8880b9133d7f R09: fffff520004aff4c
R10: dffffc0000000000 R11: ffffed10172267b0 R12: ffff8880229b46f0
R13: ffffea00015fab34 R14: 1ffff110045368de R15: 1ffff110045368eb
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8f096302f8 CR3: 000000002a01d000 CR4: 00000000003506e0
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:2717 [inline]
 jfs_lazycommit+0x581/0xb40 fs/jfs/jfs_txnmgr.c:2767
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace 03d35020c17305f0 ]---
RIP: 0010:get_page include/linux/mm.h:1224 [inline]
RIP: 0010:put_metapage+0x278/0x280 fs/jfs/jfs_metapage.c:722
Code: 38 c1 0f 8c 00 ff ff ff 4c 89 ef e8 42 b9 ec fe e9 f3 fe ff ff e8 e8 ad a7 fe 48 8b 3c 24 48 c7 c6 a0 54 62 8a e8 c8 93 da fe <0f> 0b 66 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 70
RSP: 0018:ffffc9000257fce0 EFLAGS: 00010246
RAX: 7d187675b94f3700 RBX: ffff8880229b46c8 RCX: 0000000000000000
RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff520004aff90
RBP: 000000000000007f R08: ffff8880b9133d7f R09: fffff520004aff4c
R10: dffffc0000000000 R11: ffffed10172267b0 R12: ffff8880229b46f0
R13: ffffea00015fab34 R14: 1ffff110045368de R15: 1ffff110045368eb
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f692d272000 CR3: 000000007e170000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400