BUG: Bad page state in process syz.3.292  pfn:1aaa4
page:ffffea00006aa900 refcount:0 mapcount:0 mapping:0000000000000000 index:0x4 pfn:0x1aaa4
flags: 0xfff18000002046(referenced|uptodate|workingset|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff18000002046 ffffea00008feb88 ffffc900036578a0 0000000000000000
raw: 0000000000000004 ffff88801e2f41f0 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 5886, tgid 5883 (syz.3.292), ts 172692434638, free_ts 172118904233
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560
 prep_new_page mm/page_alloc.c:2567 [inline]
 get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358
 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658
 folio_alloc+0x1c/0x60 mm/mempolicy.c:2292
 filemap_alloc_folio+0xdb/0x480 mm/filemap.c:999
 do_read_cache_folio+0x1b9/0x790 mm/filemap.c:3623
 do_read_cache_page+0x32/0x230 mm/filemap.c:3701
 read_mapping_page include/linux/pagemap.h:793 [inline]
 __get_metapage+0x319/0xfb0 fs/jfs/jfs_metapage.c:620
 dbAllocCtl+0xd2/0x980 fs/jfs/jfs_dmap.c:1813
 dbAllocAG+0x1f3/0x1000 fs/jfs/jfs_dmap.c:1353
 dbDiscardAG+0x2c1/0x8d0 fs/jfs/jfs_dmap.c:1608
 jfs_ioc_trim+0x44a/0x6c0 fs/jfs/jfs_discard.c:105
 jfs_ioctl+0x28f/0x3b0 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 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:1487 [inline]
 free_pcp_prepare mm/page_alloc.c:1537 [inline]
 free_unref_page_prepare+0x8e5/0x9e0 mm/page_alloc.c:3414
 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3555
 release_pages+0x20d1/0x2340 mm/swap.c:1035
 tlb_batch_pages_flush mm/mmu_gather.c:60 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:255 [inline]
 tlb_flush_mmu+0x105/0x220 mm/mmu_gather.c:262
 tlb_finish_mmu+0xf0/0x220 mm/mmu_gather.c:394
 exit_mmap+0x388/0x970 mm/mmap.c:3262
 __mmput+0x118/0x3a0 kernel/fork.c:1206
 exit_mm+0x24d/0x350 kernel/exit.c:566
 do_exit+0x958/0x2570 kernel/exit.c:868
 do_group_exit+0x229/0x2e0 kernel/exit.c:1024
 get_signal+0x1259/0x1340 kernel/signal.c:2872
 arch_do_signal_or_restart+0xc4/0x1310 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
Modules linked in:
CPU: 0 PID: 5895 Comm: syz.3.292 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
 bad_page+0x14b/0x170 mm/page_alloc.c:726
 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+0x447/0x9e0 mm/page_alloc.c:3414
 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3555
 release_pages+0x20d1/0x2340 mm/swap.c:1035
 __pagevec_release+0x6d/0xe0 mm/swap.c:1055
 pagevec_release include/linux/pagevec.h:71 [inline]
 folio_batch_release include/linux/pagevec.h:135 [inline]
 truncate_inode_pages_range+0x35c/0x10b0 mm/truncate.c:397
 jfs_mount_rw+0x269/0x5a0 fs/jfs/jfs_mount.c:236
 jfs_remount+0x3a5/0x5c0 fs/jfs/super.c:454
 reconfigure_super+0x224/0x8d0 fs/super.c:977
 do_remount fs/namespace.c:2741 [inline]
 path_mount+0xcce/0xfb0 fs/namespace.c:3400
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe3bb19e0ca
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe3bc05ae58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe3bc05aee0 RCX: 00007fe3bb19e0ca
RDX: 0000200000008b00 RSI: 0000200000000f00 RDI: 0000000000000000
RBP: 0000200000008b00 R08: 00007fe3bc05aee0 R09: 0000000003b4a468
R10: 0000000003b4a468 R11: 0000000000000246 R12: 0000200000000f00
R13: 00007fe3bc05aea0 R14: 0000000000000000 R15: 0000200000006500
 </TASK>
BUG: Bad page state in process syz.3.292  pfn:23fae
page:ffffea00008feb80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x3 pfn:0x23fae
flags: 0xfff18000002046(referenced|uptodate|workingset|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff18000002046 ffffea0000a70708 ffffc900036578a0 0000000000000000
raw: 0000000000000003 ffff88801e2f43e0 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 5886, tgid 5883 (syz.3.292), ts 172700904878, free_ts 172118888201
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560
 prep_new_page mm/page_alloc.c:2567 [inline]
 get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358
 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658
 folio_alloc+0x1c/0x60 mm/mempolicy.c:2292
 filemap_alloc_folio+0xdb/0x480 mm/filemap.c:999
 do_read_cache_folio+0x1b9/0x790 mm/filemap.c:3623
 do_read_cache_page+0x32/0x230 mm/filemap.c:3701
 read_mapping_page include/linux/pagemap.h:793 [inline]
 __get_metapage+0x319/0xfb0 fs/jfs/jfs_metapage.c:620
 dbAdjCtl+0x139/0xa00 fs/jfs/jfs_dmap.c:2483
 dbAllocDmap fs/jfs/jfs_dmap.c:2044 [inline]
 dbAllocDmapLev+0x1fc/0x3b0 fs/jfs/jfs_dmap.c:1988
 dbAllocCtl+0x143/0x980 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0x1f3/0x1000 fs/jfs/jfs_dmap.c:1353
 dbDiscardAG+0x2c1/0x8d0 fs/jfs/jfs_dmap.c:1608
 jfs_ioc_trim+0x44a/0x6c0 fs/jfs/jfs_discard.c:105
 jfs_ioctl+0x28f/0x3b0 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1487 [inline]
 free_pcp_prepare mm/page_alloc.c:1537 [inline]
 free_unref_page_prepare+0x8e5/0x9e0 mm/page_alloc.c:3414
 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3555
 release_pages+0x20d1/0x2340 mm/swap.c:1035
 tlb_batch_pages_flush mm/mmu_gather.c:60 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:255 [inline]
 tlb_flush_mmu+0x105/0x220 mm/mmu_gather.c:262
 tlb_finish_mmu+0xf0/0x220 mm/mmu_gather.c:394
 exit_mmap+0x388/0x970 mm/mmap.c:3262
 __mmput+0x118/0x3a0 kernel/fork.c:1206
 exit_mm+0x24d/0x350 kernel/exit.c:566
 do_exit+0x958/0x2570 kernel/exit.c:868
 do_group_exit+0x229/0x2e0 kernel/exit.c:1024
 get_signal+0x1259/0x1340 kernel/signal.c:2872
 arch_do_signal_or_restart+0xc4/0x1310 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
Modules linked in:
CPU: 0 PID: 5895 Comm: syz.3.292 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
 bad_page+0x14b/0x170 mm/page_alloc.c:726
 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+0x447/0x9e0 mm/page_alloc.c:3414
 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3555
 release_pages+0x20d1/0x2340 mm/swap.c:1035
 __pagevec_release+0x6d/0xe0 mm/swap.c:1055
 pagevec_release include/linux/pagevec.h:71 [inline]
 folio_batch_release include/linux/pagevec.h:135 [inline]
 truncate_inode_pages_range+0x35c/0x10b0 mm/truncate.c:397
 jfs_mount_rw+0x269/0x5a0 fs/jfs/jfs_mount.c:236
 jfs_remount+0x3a5/0x5c0 fs/jfs/super.c:454
 reconfigure_super+0x224/0x8d0 fs/super.c:977
 do_remount fs/namespace.c:2741 [inline]
 path_mount+0xcce/0xfb0 fs/namespace.c:3400
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe3bb19e0ca
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe3bc05ae58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe3bc05aee0 RCX: 00007fe3bb19e0ca
RDX: 0000200000008b00 RSI: 0000200000000f00 RDI: 0000000000000000
RBP: 0000200000008b00 R08: 00007fe3bc05aee0 R09: 0000000003b4a468
R10: 0000000003b4a468 R11: 0000000000000246 R12: 0000200000000f00
R13: 00007fe3bc05aea0 R14: 0000000000000000 R15: 0000200000006500
 </TASK>

 ... Log Wrap ... Log Wrap ... Log Wrap ...