BUG: Bad page state in __get_metapage

Status: upstream: reported C repro on 2025/06/20 20:02
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+fc5f83474e77007a7759@syzkaller.appspotmail.com
First crash: 510d, last: 8d23h
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2026/05/31 linux-6.6.y (ToT) 0a40c6fbd105 C [report] BUG: Bad page state in __get_metapage
2025/06/25 upstream (ToT) 7595b66ae9de C [report] INFO: task hung in lmLogClose
2026/05/31 upstream (ToT) 174914ea5513 C Didn't crash
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 BUG: Bad page state in __get_metapage origin:upstream -1 syz, C 1606 3d09h 751d 0/3 upstream: reported C repro on 2024/10/23 03:58
linux-6.1 BUG: Bad page state in __get_metapage origin:upstream missing-backport -1 syz, C done 2288 7h54m 751d 0/3 upstream: reported C repro on 2024/10/23 12:46
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2026/06/01 06:45 13m fix candidate upstream error job log

Sample crash report:
syz.0.17[5980]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
loop0: detected capacity change from 0 to 32768
jfs_mkdir: dtInsert returned -EIO
ERROR: (device loop0): jfs_mkdir: 
ERROR: (device loop0): remounting filesystem as read-only
BUG: Bad page state in process syz.0.17  pfn:7509f
page:ffffea0001d427c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2f pfn:0x7509f
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea0001d42708 ffffc900015e7940 0000000000000000
raw: 000000000000002f ffff888075274e88 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 5980, tgid 5980 (syz.0.17), ts 110012665481, free_ts 109951280178
 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
 __filemap_get_folio+0x3fb/0xbe0 mm/filemap.c:1962
 pagecache_get_page+0x2a/0x250 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:755 [inline]
 grab_cache_page include/linux/pagemap.h:877 [inline]
 __get_metapage+0x2ab/0xfa0 fs/jfs/jfs_metapage.c:613
 diNewExt+0xa4b/0x3000 fs/jfs/jfs_imap.c:2275
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xbe2/0x1dd0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1df/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x940 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1e5/0xae0 fs/jfs/namei.c:225
 vfs_mkdir+0x2a5/0x470 fs/namei.c:4180
 do_mkdirat+0x1dc/0x450 fs/namei.c:4203
 __do_sys_mkdirat fs/namei.c:4218 [inline]
 __se_sys_mkdirat fs/namei.c:4216 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4216
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:2357
 do_vmi_align_munmap+0x1057/0x16a0 mm/mmap.c:2600
 do_vmi_munmap+0x252/0x2d0 mm/mmap.c:2668
 __vm_munmap+0x19e/0x3c0 mm/mmap.c:2969
 __do_sys_munmap mm/mmap.c:2986 [inline]
 __se_sys_munmap mm/mmap.c:2983 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:2983
 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: 5980 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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
 jfs_remount+0x34c/0x5c0 fs/jfs/super.c:451
 reconfigure_super+0x229/0x8e0 fs/super.c:1154
 do_remount fs/namespace.c:2953 [inline]
 path_mount+0xcfe/0xfa0 fs/namespace.c:3759
 do_mount fs/namespace.c:3780 [inline]
 __do_sys_mount fs/namespace.c:3989 [inline]
 __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3966
 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
RIP: 0033:0x7fb1345a07ca
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:00007ffcf347fa68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffcf347faf0 RCX: 00007fb1345a07ca
RDX: 000020000000c880 RSI: 000020000000c8c0 RDI: 0000000000000000
RBP: 000020000000c880 R08: 00007ffcf347faf0 R09: 0000000001a5a438
R10: 0000000001a5a438 R11: 0000000000000246 R12: 000020000000c8c0
R13: 00007ffcf347fab0 R14: 0000000000000000 R15: 000020000000c900
 </TASK>
BUG: Bad page state in process syz.0.17  pfn:7509c
page:ffffea0001d42700 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2e pfn:0x7509c
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea0001d42a48 ffffc900015e7940 0000000000000000
raw: 000000000000002e ffff888075274d90 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 5980, tgid 5980 (syz.0.17), ts 110012604553, free_ts 109951290903
 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
 __filemap_get_folio+0x3fb/0xbe0 mm/filemap.c:1962
 pagecache_get_page+0x2a/0x250 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:755 [inline]
 grab_cache_page include/linux/pagemap.h:877 [inline]
 __get_metapage+0x2ab/0xfa0 fs/jfs/jfs_metapage.c:613
 diNewExt+0xa4b/0x3000 fs/jfs/jfs_imap.c:2275
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xbe2/0x1dd0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1df/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x940 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1e5/0xae0 fs/jfs/namei.c:225
 vfs_mkdir+0x2a5/0x470 fs/namei.c:4180
 do_mkdirat+0x1dc/0x450 fs/namei.c:4203
 __do_sys_mkdirat fs/namei.c:4218 [inline]
 __se_sys_mkdirat fs/namei.c:4216 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4216
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:2357
 do_vmi_align_munmap+0x1057/0x16a0 mm/mmap.c:2600
 do_vmi_munmap+0x252/0x2d0 mm/mmap.c:2668
 __vm_munmap+0x19e/0x3c0 mm/mmap.c:2969
 __do_sys_munmap mm/mmap.c:2986 [inline]
 __se_sys_munmap mm/mmap.c:2983 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:2983
 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: 5980 Comm: syz.0.17 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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
 jfs_remount+0x34c/0x5c0 fs/jfs/super.c:451
 reconfigure_super+0x229/0x8e0 fs/super.c:1154
 do_remount fs/namespace.c:2953 [inline]
 path_mount+0xcfe/0xfa0 fs/namespace.c:3759
 do_mount fs/namespace.c:3780 [inline]
 __do_sys_mount fs/namespace.c:3989 [inline]
 __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3966
 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
RIP: 0033:0x7fb1345a07ca
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:00007ffcf347fa68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffcf347faf0 RCX: 00007fb1345a07ca
RDX: 000020000000c880 RSI: 000020000000c8c0 RDI: 0000000000000000
RBP: 000020000000c880 R08: 00007ffcf347faf0 R09: 0000000001a5a438
R10: 0000000001a5a438 R11: 0000000000000246 R12: 000020000000c8c0
R13: 00007ffcf347fab0 R14: 0000000000000000 R15: 000020000000c900
 </TASK>
BUG: Bad page state in process syz.0.17  pfn:750a9
page:ffffea0001d42a40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2d pfn:0x750a9
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea0001d49d88 ffffc900015e7940 0000000000000000
raw: 000000000000002d ffff888075274c98 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 5980, tgid 5980 (syz.0.17), ts 110012539964, free_ts 109951300735
 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
 __filemap_get_folio+0x3fb/0xbe0 mm/filemap.c:1962
 pagecache_get_page+0x2a/0x250 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:755 [inline]
 grab_cache_page include/linux/pagemap.h:877 [inline]
 __get_metapage+0x2ab/0xfa0 fs/jfs/jfs_metapage.c:613
 diNewExt+0xa4b/0x3000 fs/jfs/jfs_imap.c:2275
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xbe2/0x1dd0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1df/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x940 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1e5/0xae0 fs/jfs/namei.c:225
 vfs_mkdir+0x2a5/0x470 fs/namei.c:4180
 do_mkdirat+0x1dc/0x450 fs/namei.c:4203
 __do_sys_mkdirat fs/namei.c:4218 [inline]
 __se_sys_mkdirat fs/namei.c:4216 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4216
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:2357
 do_vmi_align_munmap+0x1057/0x16a0 mm/mmap.c:2600
 do_vmi_munmap+0x252/0x2d0 mm/mmap.c:2668
 __vm_munmap+0x19e/0x3c0 mm/mmap.c:2969
 __do_sys_munmap mm/mmap.c:2986 [inline]
 __se_sys_munmap mm/mmap.c:2983 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:2983
 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: 5980 Comm: syz.0.17 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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
 jfs_remount+0x34c/0x5c0 fs/jfs/super.c:451
 reconfigure_super+0x229/0x8e0 fs/super.c:1154
 do_remount fs/namespace.c:2953 [inline]
 path_mount+0xcfe/0xfa0 fs/namespace.c:3759
 do_mount fs/namespace.c:3780 [inline]
 __do_sys_mount fs/namespace.c:3989 [inline]
 __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3966
 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
RIP: 0033:0x7fb1345a07ca
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:00007ffcf347fa68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffcf347faf0 RCX: 00007fb1345a07ca
RDX: 000020000000c880 RSI: 000020000000c8c0 RDI: 0000000000000000
RBP: 000020000000c880 R08: 00007ffcf347faf0 R09: 0000000001a5a438
R10: 0000000001a5a438 R11: 0000000000000246 R12: 000020000000c8c0
R13: 00007ffcf347fab0 R14: 0000000000000000 R15: 000020000000c900
 </TASK>
BUG: Bad page state in process syz.0.17  pfn:75276
page:ffffea0001d49d80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2c pfn:0x75276
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea00009db608 ffffc900015e7940 0000000000000000
raw: 000000000000002c ffff888075274ba0 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 5980, tgid 5980 (syz.0.17), ts 110012170813, free_ts 109977914608
 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
 __filemap_get_folio+0x3fb/0xbe0 mm/filemap.c:1962
 pagecache_get_page+0x2a/0x250 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:755 [inline]
 grab_cache_page include/linux/pagemap.h:877 [inline]
 __get_metapage+0x2ab/0xfa0 fs/jfs/jfs_metapage.c:613
 diNewExt+0xa4b/0x3000 fs/jfs/jfs_imap.c:2275
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xbe2/0x1dd0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1df/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x940 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1e5/0xae0 fs/jfs/namei.c:225
 vfs_mkdir+0x2a5/0x470 fs/namei.c:4180
 do_mkdirat+0x1dc/0x450 fs/namei.c:4203
 __do_sys_mkdirat fs/namei.c:4218 [inline]
 __se_sys_mkdirat fs/namei.c:4216 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4216
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
 __slab_free+0x35a/0x400 mm/slub.c:3759
 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:3518 [inline]
 slab_alloc mm/slub.c:3526 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3533 [inline]
 kmem_cache_alloc+0x17e/0x2d0 mm/slub.c:3542
 getname_flags+0xbb/0x500 fs/namei.c:145
 user_path_at_empty+0x2c/0x60 fs/namei.c:2971
 do_readlinkat+0xdd/0x490 fs/stat.c:494
 __do_sys_readlink fs/stat.c:527 [inline]
 __se_sys_readlink fs/stat.c:524 [inline]
 __x64_sys_readlink+0x7f/0x90 fs/stat.c:524
 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: 5980 Comm: syz.0.17 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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
 jfs_remount+0x34c/0x5c0 fs/jfs/super.c:451
 reconfigure_super+0x229/0x8e0 fs/super.c:1154
 do_remount fs/namespace.c:2953 [inline]
 path_mount+0xcfe/0xfa0 fs/namespace.c:3759
 do_mount fs/namespace.c:3780 [inline]
 __do_sys_mount fs/namespace.c:3989 [inline]
 __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3966
 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
RIP: 0033:0x7fb1345a07ca
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:00007ffcf347fa68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffcf347faf0 RCX: 00007fb1345a07ca
RDX: 000020000000c880 RSI: 000020000000c8c0 RDI: 0000000000000000
RBP: 000020000000c880 R08: 00007ffcf347faf0 R09: 0000000001a5a438
R10: 0000000001a5a438 R11: 0000000000000246 R12: 000020000000c8c0
R13: 00007ffcf347fab0 R14: 0000000000000000 R15: 000020000000c900
 </TASK>

Crashes (1174):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/24 08:29 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/03/27 10:00 linux-6.6.y c09fbcd31ae6 766b6434 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/01/25 12:31 linux-6.6.y cbb31f77b879 40acda8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2025/11/29 02:08 linux-6.6.y 1e89a1be4fe9 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2025/10/03 06:56 linux-6.6.y f34f16e5c632 49379ee0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2025/06/23 15:50 linux-6.6.y 6282921b6825 d6cdfb8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2025/06/23 15:14 linux-6.6.y 6282921b6825 d6cdfb8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2025/11/29 00:52 linux-6.6.y 1e89a1be4fe9 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/11/04 20:59 linux-6.6.y b5a1dc3ad482 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/11/04 18:43 linux-6.6.y b5a1dc3ad482 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/11/02 23:57 linux-6.6.y b5a1dc3ad482 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/11/02 17:28 linux-6.6.y b5a1dc3ad482 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/31 03:07 linux-6.6.y b5a1dc3ad482 0ec395f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/27 10:18 linux-6.6.y 0aebf2870d53 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/27 10:18 linux-6.6.y 0aebf2870d53 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/24 04:47 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/22 06:22 linux-6.6.y 0aebf2870d53 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/13 09:35 linux-6.6.y a91a6aa9253c 5a1eeac4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/12 15:54 linux-6.6.y a91a6aa9253c 745a967f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/09 19:39 linux-6.6.y a91a6aa9253c 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/09 19:34 linux-6.6.y a91a6aa9253c 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/08 07:59 linux-6.6.y a91a6aa9253c 4f6a9fcf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/07 11:05 linux-6.6.y a91a6aa9253c 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/06 23:19 linux-6.6.y a91a6aa9253c f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/06 02:38 linux-6.6.y a91a6aa9253c f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/05 13:10 linux-6.6.y a91a6aa9253c af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/05 06:28 linux-6.6.y a91a6aa9253c 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/03 13:52 linux-6.6.y a91a6aa9253c 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/02 18:52 linux-6.6.y 79643295eba1 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/02 10:38 linux-6.6.y 79643295eba1 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/02 03:16 linux-6.6.y 79643295eba1 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/02 03:11 linux-6.6.y 79643295eba1 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/10/01 14:29 linux-6.6.y 79643295eba1 f5cdae2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/30 20:14 linux-6.6.y 79643295eba1 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/30 08:06 linux-6.6.y 79643295eba1 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/29 19:14 linux-6.6.y 79643295eba1 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/29 02:36 linux-6.6.y 79643295eba1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/26 04:24 linux-6.6.y 79643295eba1 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/25 04:41 linux-6.6.y 79643295eba1 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/24 16:27 linux-6.6.y 79643295eba1 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/23 12:45 linux-6.6.y 79643295eba1 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/23 01:51 linux-6.6.y 79643295eba1 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/23 01:51 linux-6.6.y 79643295eba1 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/22 07:28 linux-6.6.y 79643295eba1 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/18 09:36 linux-6.6.y 79643295eba1 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/17 19:07 linux-6.6.y 79643295eba1 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/17 00:44 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/16 06:44 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/16 06:41 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/15 15:41 linux-6.6.y 79643295eba1 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/14 16:38 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/13 06:37 linux-6.6.y 8b73de7da85f 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2025/06/20 20:02 linux-6.6.y 6282921b6825 804b3919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
* Struck through repros no longer work on HEAD.