BUG: Bad page state in process syz-executor  pfn:2abfc
page:ffffea0000aaff00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x4 pfn:0x2abfc
flags: 0xfff1800000820c(referenced|uptodate|workingset|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff1800000820c ffffea0000b44a48 ffffc90004537940 0000000000000000
raw: 0000000000000004 ffff88801efbb0f8 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 7515, tgid 7513 (syz.2.623), ts 167011878146, free_ts 166994236236
 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_list+0xbe/0x860 mm/page_alloc.c:2505
 release_pages+0x208a/0x2300 mm/swap.c:1022
 tlb_batch_pages_flush mm/mmu_gather.c:99 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:294 [inline]
 tlb_flush_mmu+0x379/0x510 mm/mmu_gather.c:301
 tlb_finish_mmu+0xf4/0x220 mm/mmu_gather.c:425
 unmap_region+0x311/0x370 mm/mmap.c:2349
 do_vmi_align_munmap+0x1057/0x16a0 mm/mmap.c:2592
 do_vmi_munmap+0x252/0x2d0 mm/mmap.c:2660
 __vm_munmap+0x19e/0x3c0 mm/mmap.c:2961
 __do_sys_munmap mm/mmap.c:2978 [inline]
 __se_sys_munmap mm/mmap.c:2975 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:2975
 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: 1 PID: 5781 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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: 0033:0x7fdea779f397
Code: a2 c7 05 5c 43 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:00007ffdb7dec9e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fdea783448b RCX: 00007fdea779f397
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdb7decaa0
RBP: 00007ffdb7decaa0 R08: 00007ffdb7dedaa0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdb7dedb30
R13: 00007fdea783448b R14: 0000000000028cec R15: 00007ffdb7dedb70
 </TASK>
BUG: Bad page state in process syz-executor  pfn:2d129
page:ffffea0000b44a40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x3 pfn:0x2d129
flags: 0xfff1800000820c(referenced|uptodate|workingset|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff1800000820c ffffea0000aea6c8 ffffc90004537940 0000000000000000
raw: 0000000000000003 ffff88807d9ec1f0 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 7515, tgid 7513 (syz.2.623), ts 166986726757, free_ts 166963444203
 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
 discard_slab mm/slub.c:2127 [inline]
 __unfreeze_partials+0x1cf/0x210 mm/slub.c:2667
 put_cpu_partial+0x17c/0x250 mm/slub.c:2743
 __slab_free+0x319/0x400 mm/slub.c:3700
 qlink_free mm/kasan/quarantine.c:166 [inline]
 qlist_free_all+0x75/0xd0 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:306
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x6a/0x4d0 mm/slab.h:770
 slab_alloc_node mm/slub.c:3495 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc_lru+0x175/0x2b0 mm/slub.c:3526
 alloc_inode_sb include/linux/fs.h:2976 [inline]
 shmem_alloc_inode+0x28/0x40 mm/shmem.c:4419
 alloc_inode fs/inode.c:261 [inline]
 new_inode_pseudo+0x63/0x1d0 fs/inode.c:1049
 new_inode+0x22/0x1d0 fs/inode.c:1075
 __shmem_get_inode mm/shmem.c:2467 [inline]
 shmem_get_inode+0x34d/0xcd0 mm/shmem.c:2539
 shmem_mknod+0x5f/0x1c0 mm/shmem.c:3232
 shmem_mkdir+0x33/0x60 mm/shmem.c:3297
Modules linked in:
CPU: 0 PID: 5781 Comm: syz-executor Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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: 0033:0x7fdea779f397
Code: a2 c7 05 5c 43 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:00007ffdb7dec9e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fdea783448b RCX: 00007fdea779f397
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdb7decaa0
RBP: 00007ffdb7decaa0 R08: 00007ffdb7dedaa0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdb7dedb30
R13: 00007fdea783448b R14: 0000000000028cec R15: 00007ffdb7dedb70
 </TASK>