BUG: Bad page state in process jfsCommit  pfn:7e9a1
page:ffffea0001fa6840 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1c pfn:0x7e9a1
flags: 0xfff00000002007(locked|referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002007 dead000000000100 dead000000000122 0000000000000000
raw: 000000000000001c ffff88802279d8b8 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 13954, ts 634706407472, free_ts 634073595285
 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
 do_read_cache_page+0x1da/0x1030 mm/filemap.c:3457
 read_mapping_page include/linux/pagemap.h:515 [inline]
 __get_metapage+0x35d/0x1060 fs/jfs/jfs_metapage.c:621
 diRead+0x6f7/0xbb0 fs/jfs/jfs_imap.c:367
 jfs_iget+0x89/0x3f0 fs/jfs/inode.c:35
 jfs_fill_super+0x73b/0xb00 fs/jfs/super.c:585
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
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_list+0x119/0x820 mm/page_alloc.c:3433
 release_pages+0x186c/0x1be0 mm/swap.c:963
 __pagevec_release+0x6d/0xe0 mm/swap.c:983
 pagevec_release include/linux/pagevec.h:81 [inline]
 __invalidate_mapping_pages+0x570/0x6b0 mm/truncate.c:509
 btrfs_close_bdev fs/btrfs/volumes.c:1186 [inline]
 btrfs_close_one_device fs/btrfs/volumes.c:1210 [inline]
 close_fs_devices+0x443/0x930 fs/btrfs/volumes.c:1253
 btrfs_close_devices+0xca/0x510 fs/btrfs/volumes.c:1268
 close_ctree+0x785/0x8e0 fs/btrfs/disk-io.c:4538
 generic_shutdown_super+0x130/0x300 fs/super.c:475
 kill_anon_super+0x36/0x70 fs/super.c:1089
 btrfs_kill_super+0x3d/0x50 fs/btrfs/super.c:2390
 deactivate_locked_super+0x93/0xf0 fs/super.c:335
 cleanup_mnt+0x42d/0x4e0 fs/namespace.c:1148
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
Modules linked in:
CPU: 0 PID: 277 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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:ffffea0001fa6840 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1c pfn:0x7e9a1
flags: 0xfff00000002007(locked|referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002007 dead000000000100 dead000000000122 0000000000000000
raw: 000000000000001c ffff88802279d8b8 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 13954, ts 634706407472, free_ts 634073595285
 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
 do_read_cache_page+0x1da/0x1030 mm/filemap.c:3457
 read_mapping_page include/linux/pagemap.h:515 [inline]
 __get_metapage+0x35d/0x1060 fs/jfs/jfs_metapage.c:621
 diRead+0x6f7/0xbb0 fs/jfs/jfs_imap.c:367
 jfs_iget+0x89/0x3f0 fs/jfs/inode.c:35
 jfs_fill_super+0x73b/0xb00 fs/jfs/super.c:585
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
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_list+0x119/0x820 mm/page_alloc.c:3433
 release_pages+0x186c/0x1be0 mm/swap.c:963
 __pagevec_release+0x6d/0xe0 mm/swap.c:983
 pagevec_release include/linux/pagevec.h:81 [inline]
 __invalidate_mapping_pages+0x570/0x6b0 mm/truncate.c:509
 btrfs_close_bdev fs/btrfs/volumes.c:1186 [inline]
 btrfs_close_one_device fs/btrfs/volumes.c:1210 [inline]
 close_fs_devices+0x443/0x930 fs/btrfs/volumes.c:1253
 btrfs_close_devices+0xca/0x510 fs/btrfs/volumes.c:1268
 close_ctree+0x785/0x8e0 fs/btrfs/disk-io.c:4538
 generic_shutdown_super+0x130/0x300 fs/super.c:475
 kill_anon_super+0x36/0x70 fs/super.c:1089
 btrfs_kill_super+0x3d/0x50 fs/btrfs/super.c:2390
 deactivate_locked_super+0x93/0xf0 fs/super.c:335
 cleanup_mnt+0x42d/0x4e0 fs/namespace.c:1148
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1224!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 277 Comm: jfsCommit Tainted: G    B             syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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 be ec fe e9 f3 fe ff ff e8 78 9f a7 fe 48 8b 3c 24 48 c7 c6 a0 56 62 8a e8 f8 89 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:ffffc900030afce0 EFLAGS: 00010246
RAX: da0fd144fef20800 RBX: ffff88802279d8b8 RCX: 0000000000000000
RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff52000615f90
RBP: 000000000000007f R08: ffffc900030af407 R09: fffff52000615f4c
R10: dffffc0000000000 R11: fffff52000615e81 R12: ffff88802279d8e0
R13: ffffea0001fa6874 R14: 1ffff110044f3b1c R15: 1ffff110044f3b29
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9ed149bfe0 CR3: 000000007b551000 CR4: 00000000003526e0
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 94749e31a5c21471 ]---
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 be ec fe e9 f3 fe ff ff e8 78 9f a7 fe 48 8b 3c 24 48 c7 c6 a0 56 62 8a e8 f8 89 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:ffffc900030afce0 EFLAGS: 00010246
RAX: da0fd144fef20800 RBX: ffff88802279d8b8 RCX: 0000000000000000
RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff52000615f90
RBP: 000000000000007f R08: ffffc900030af407 R09: fffff52000615f4c
R10: dffffc0000000000 R11: fffff52000615e81 R12: ffff88802279d8e0
R13: ffffea0001fa6874 R14: 1ffff110044f3b1c R15: 1ffff110044f3b29
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9ed149bfe0 CR3: 00000000622f7000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400