BUG: Bad page state in process syz-executor  pfn:6cca4
page:ffffea0001b32900 refcount:0 mapcount:0 mapping:0000000000000000 index:0x4 pfn:0x6cca4
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea0001d35248 ffffc90003087940 0000000000000000
raw: 0000000000000004 ffff88805c4816c8 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 12043, tgid 12040 (syz.5.2229), ts 372443237709, free_ts 372442538330
 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
 do_read_cache_folio+0x381/0x7f0 mm/filemap.c:3773
 do_read_cache_page+0x32/0x260 mm/filemap.c:3875
 read_mapping_page include/linux/pagemap.h:892 [inline]
 __get_metapage+0x31d/0xfa0 fs/jfs/jfs_metapage.c:620
 dbAllocCtl+0xd2/0x980 fs/jfs/jfs_dmap.c:1813
 dbAllocAG+0xc46/0x1000 fs/jfs/jfs_dmap.c:1472
 dbDiscardAG+0x2c5/0x8e0 fs/jfs/jfs_dmap.c:1608
 jfs_ioc_trim+0x42c/0x670 fs/jfs/jfs_discard.c:106
 jfs_ioctl+0x292/0x3b0 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 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
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
 xfs_buf_free_pages+0x15b/0x350 fs/xfs/xfs_buf.c:287
 xfs_buf_free+0x100/0x2a0 fs/xfs/xfs_buf.c:316
 xfs_buf_rele+0x123c/0x16c0 fs/xfs/xfs_buf.c:-1
 xfs_buftarg_drain+0x4c7/0x650 fs/xfs/xfs_buf.c:1860
 xfs_log_mount_finish+0x338/0x390 fs/xfs/xfs_log.c:820
 xfs_mountfs+0x1482/0x1cc0 fs/xfs/xfs_mount.c:937
 xfs_fs_fill_super+0x113a/0x13a0 fs/xfs/xfs_super.c:1747
 get_tree_bdev+0x3e5/0x520 fs/super.c:1599
 vfs_get_tree+0x8c/0x280 fs/super.c:1772
 do_new_mount+0x24a/0xa40 fs/namespace.c:3386
 do_mount fs/namespace.c:3726 [inline]
 __do_sys_mount fs/namespace.c:3935 [inline]
 __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912
 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: 0 PID: 7650 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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_list+0xbe/0x860 mm/page_alloc.c:2505
 release_pages+0x208a/0x2300 mm/swap.c:1022
 __folio_batch_release+0x71/0xe0 mm/swap.c:1042
 folio_batch_release include/linux/pagevec.h:83 [inline]
 truncate_inode_pages_range+0x381/0xea0 mm/truncate.c:396
 dbUnmount+0x109/0x180 fs/jfs/jfs_dmap.c:264
 jfs_umount+0x235/0x3a0 fs/jfs/jfs_umount.c:87
 jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x134/0x2b0 fs/super.c:693
 kill_block_super+0x44/0x90 fs/super.c:1668
 deactivate_locked_super+0x97/0x100 fs/super.c:481
 cleanup_mnt+0x3d7/0x460 fs/namespace.c:1259
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:180
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
 __syscall_exit_to_user_mode_work kernel/entry/common.c:294 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:305
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f721939f3d7
Code: a2 c7 05 1c 53 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffec3701c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f72194344fb RCX: 00007f721939f3d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffec3701cc0
RBP: 00007ffec3701cc0 R08: 00007ffec3702cc0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffec3702d50
R13: 00007f72194344fb R14: 000000000005af61 R15: 00007ffec3702d90
 </TASK>
BUG: Bad page state in process syz-executor  pfn:74d49
page:ffffea0001d35240 refcount:0 mapcount:0 mapping:0000000000000000 index:0x3 pfn:0x74d49
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea0001eb61c8 ffffc90003087940 0000000000000000
raw: 0000000000000003 ffff88805c4819b0 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 12043, tgid 12040 (syz.5.2229), ts 372392919419, free_ts 372375530870
 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
 do_read_cache_folio+0x381/0x7f0 mm/filemap.c:3773
 do_read_cache_page+0x32/0x260 mm/filemap.c:3875
 read_mapping_page include/linux/pagemap.h:892 [inline]
 __get_metapage+0x31d/0xfa0 fs/jfs/jfs_metapage.c:620
 dbAllocAG+0x3fa/0x1000 fs/jfs/jfs_dmap.c:1369
 dbDiscardAG+0x2c5/0x8e0 fs/jfs/jfs_dmap.c:1608
 jfs_ioc_trim+0x42c/0x670 fs/jfs/jfs_discard.c:106
 jfs_ioctl+0x292/0x3b0 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 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
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
 lbmLogShutdown fs/jfs/jfs_logmgr.c:1864 [inline]
 lmLogShutdown+0x44f/0x850 fs/jfs/jfs_logmgr.c:1684
 lmLogClose+0x28c/0x530 fs/jfs/jfs_logmgr.c:1460
 jfs_remount+0x414/0x5c0 fs/jfs/super.c:466
 reconfigure_super+0x229/0x8e0 fs/super.c:1151
 do_remount fs/namespace.c:2927 [inline]
 path_mount+0xcfe/0xfa0 fs/namespace.c:3705
 do_mount fs/namespace.c:3726 [inline]
 __do_sys_mount fs/namespace.c:3935 [inline]
 __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912
 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: 0 PID: 7650 Comm: syz-executor Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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_list+0xbe/0x860 mm/page_alloc.c:2505
 release_pages+0x208a/0x2300 mm/swap.c:1022
 __folio_batch_release+0x71/0xe0 mm/swap.c:1042
 folio_batch_release include/linux/pagevec.h:83 [inline]
 truncate_inode_pages_range+0x381/0xea0 mm/truncate.c:396
 dbUnmount+0x109/0x180 fs/jfs/jfs_dmap.c:264
 jfs_umount+0x235/0x3a0 fs/jfs/jfs_umount.c:87
 jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x134/0x2b0 fs/super.c:693
 kill_block_super+0x44/0x90 fs/super.c:1668
 deactivate_locked_super+0x97/0x100 fs/super.c:481
 cleanup_mnt+0x3d7/0x460 fs/namespace.c:1259
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:180
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
 __syscall_exit_to_user_mode_work kernel/entry/common.c:294 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:305
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f721939f3d7
Code: a2 c7 05 1c 53 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffec3701c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f72194344fb RCX: 00007f721939f3d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffec3701cc0
RBP: 00007ffec3701cc0 R08: 00007ffec3702cc0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffec3702d50
R13: 00007f72194344fb R14: 000000000005af61 R15: 00007ffec3702d90
 </TASK>