ERROR: (device loop1): dbUpdatePMap: blocks are outside the map
ERROR: (device loop1): remounting filesystem as read-only
BUG: Bad page state in process jfsCommit  pfn:10a249
page:00000000f1ea147c refcount:0 mapcount:0 mapping:0000000000000000 index:0x50030 pfn:0x10a249
flags: 0x5ffc00000002007(locked|referenced|uptodate|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000002007 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000050030 ffff0000ef7a51f0 00000000ffffffff 0000000000000000
page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
Modules linked in:
CPU: 1 PID: 95 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 bad_page+0x188/0x1a8 mm/page_alloc.c:726
 free_page_is_bad_report+0xf8/0x170 mm/page_alloc.c:1308
 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:1537 [inline]
 free_unref_page_prepare+0x638/0xb24 mm/page_alloc.c:3414
 free_unref_page+0x7c/0x3a0 mm/page_alloc.c:3509
 __folio_put_small mm/swap.c:97 [inline]
 __folio_put+0xd0/0x128 mm/swap.c:120
 folio_put include/linux/mm.h:1182 [inline]
 put_page include/linux/mm.h:1234 [inline]
 _metapage_homeok+0x130/0x210 fs/jfs/jfs_metapage.h:119
 txUnlock+0x230/0xbac fs/jfs/jfs_txnmgr.c:933
 txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
 jfs_lazycommit+0x454/0x930 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
page:00000000f1ea147c refcount:0 mapcount:0 mapping:0000000000000000 index:0x50030 pfn:0x10a249
flags: 0x5ffc00000002007(locked|referenced|uptodate|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000002007 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000050030 ffff0000ef7a51f0 00000000ffffffff 0000000000000000
page dumped because: VM_BUG_ON_FOLIO(((unsigned int) folio_ref_count(folio) + 127u <= 127u))
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1146!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 95 Comm: jfsCommit Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : folio_get include/linux/mm.h:1146 [inline]
pc : get_page include/linux/mm.h:1152 [inline]
pc : put_metapage+0x270/0x2b4 fs/jfs/jfs_metapage.c:721
lr : folio_get include/linux/mm.h:1146 [inline]
lr : get_page include/linux/mm.h:1152 [inline]
lr : put_metapage+0x270/0x2b4 fs/jfs/jfs_metapage.c:721
sp : ffff800020697c10
x29: ffff800020697c10 x28: ffff8000201fa0d8 x27: 0000000000000048
x26: ffff80001c741000 x25: 1fffe0001def4a43 x24: 1fffe0001def4a50
x23: dfff800000000000 x22: 000000000000007f x21: fffffc0003289274
x20: fffffc0003289240 x19: ffff0000ef7a51f0 x18: 1fffe00033e7697e
x17: ffff80001537d000 x16: ffff800011b90080 x15: 0000000040000000
x14: 0000000000000001 x13: 1fffe00033e769a3 x12: 0000000000000000
x11: ff008000087c9780 x10: 0000000000000000 x9 : ffff8000087c9780
x8 : ffff0000c7cf0000 x7 : ffff800011cec160 x6 : ffff80000825ab50
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008540904
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000005c
Call trace:
 folio_get include/linux/mm.h:1146 [inline]
 get_page include/linux/mm.h:1152 [inline]
 put_metapage+0x270/0x2b4 fs/jfs/jfs_metapage.c:721
 txUnlock+0x3bc/0xbac fs/jfs/jfs_txnmgr.c:948
 txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
 jfs_lazycommit+0x454/0x930 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
Code: f0043bc1 91160021 aa1403e0 97bb8033 (d4210000) 
---[ end trace 0000000000000000 ]---