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: 454d, last: 4h52m
▶ ▼ 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 1561 18h31m 695d 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 2244 1d13h 695d 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:
blkno = 8ed2c, nblocks = 1
ERROR: (device loop0): dbUpdatePMap: blocks are outside the map
ERROR: (device loop0): remounting filesystem as read-only
UFO tlock:0xffffc9000287a090
BUG: Bad page state in process syz.0.17  pfn:7af77
page:ffffea0001ebddc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x8ed2f pfn:0x7af77
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea00009b6f88 ffffc900032f7940 0000000000000000
raw: 000000000008ed2f ffff8880311fcaa8 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 5914, tgid 5914 (syz.0.17), ts 106862318075, free_ts 106601841842
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
 prep_new_page mm/page_alloc.c:1588 [inline]
 get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2289
 filemap_alloc_folio+0xdf/0x490 mm/filemap.c:1004
 __filemap_get_folio+0x3ea/0xbb0 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+0x2a8/0xfa0 fs/jfs/jfs_metapage.c:613
 diNewExt+0xa82/0x3120 fs/jfs/jfs_imap.c:2275
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xea5/0x1da0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1d5/0x1660 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x950 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1df/0xac0 fs/jfs/namei.c:225
 vfs_mkdir+0x296/0x440 fs/namei.c:4121
 do_mkdirat+0x1dc/0x450 fs/namei.c:4144
 __do_sys_mkdirat fs/namei.c:4159 [inline]
 __se_sys_mkdirat fs/namei.c:4157 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1181 [inline]
 free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
 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+0x6e/0x4b0 mm/slab.h:767
 slab_alloc_node mm/slub.c:3495 [inline]
 kmem_cache_alloc_node+0x14c/0x320 mm/slub.c:3540
 __alloc_skb+0x103/0x2c0 net/core/skbuff.c:643
 alloc_skb include/linux/skbuff.h:1316 [inline]
 nlmsg_new include/net/netlink.h:1010 [inline]
 rtmsg_ifinfo_build_skb+0x8c/0x260 net/core/rtnetlink.c:4063
 rtmsg_ifinfo_event net/core/rtnetlink.c:4106 [inline]
 rtmsg_ifinfo+0x8c/0x1a0 net/core/rtnetlink.c:4115
 netdev_state_change+0xfe/0x170 net/core/dev.c:1423
 linkwatch_do_dev+0x10d/0x160 net/core/link_watch.c:191
 __linkwatch_run_queue+0x417/0x670 net/core/link_watch.c:244
Modules linked in:
CPU: 0 PID: 5914 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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+0x85f/0x8c0 mm/page_alloc.c:2365
 free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2504
 release_pages+0x1f7a/0x2200 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+0x3b9/0xfb0 mm/truncate.c:396
 jfs_remount+0x341/0x5b0 fs/jfs/super.c:451
 reconfigure_super+0x21e/0x8a0 fs/super.c:1151
 do_remount fs/namespace.c:2927 [inline]
 path_mount+0xd2f/0xff0 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+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7faff4b9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fff4e22b0a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007faff4e15fa0 RCX: 00007faff4b9c799
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007faff4c32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002236824 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faff4e15fac R14: 00007faff4e15fa0 R15: 00007faff4e15fa0
 </TASK>
BUG: Bad page state in process syz.0.17  pfn:26dbe
page:ffffea00009b6f80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x8ed2e pfn:0x26dbe
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea0000afc408 ffffc900032f7940 0000000000000000
raw: 000000000008ed2e ffff8880311fc9b0 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 5914, tgid 5914 (syz.0.17), ts 106862257384, free_ts 106601858603
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
 prep_new_page mm/page_alloc.c:1588 [inline]
 get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2289
 filemap_alloc_folio+0xdf/0x490 mm/filemap.c:1004
 __filemap_get_folio+0x3ea/0xbb0 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+0x2a8/0xfa0 fs/jfs/jfs_metapage.c:613
 diNewExt+0xa82/0x3120 fs/jfs/jfs_imap.c:2275
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xea5/0x1da0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1d5/0x1660 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x950 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1df/0xac0 fs/jfs/namei.c:225
 vfs_mkdir+0x296/0x440 fs/namei.c:4121
 do_mkdirat+0x1dc/0x450 fs/namei.c:4144
 __do_sys_mkdirat fs/namei.c:4159 [inline]
 __se_sys_mkdirat fs/namei.c:4157 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1181 [inline]
 free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
 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+0x6e/0x4b0 mm/slab.h:767
 slab_alloc_node mm/slub.c:3495 [inline]
 kmem_cache_alloc_node+0x14c/0x320 mm/slub.c:3540
 __alloc_skb+0x103/0x2c0 net/core/skbuff.c:643
 alloc_skb include/linux/skbuff.h:1316 [inline]
 nlmsg_new include/net/netlink.h:1010 [inline]
 rtmsg_ifinfo_build_skb+0x8c/0x260 net/core/rtnetlink.c:4063
 rtmsg_ifinfo_event net/core/rtnetlink.c:4106 [inline]
 rtmsg_ifinfo+0x8c/0x1a0 net/core/rtnetlink.c:4115
 netdev_state_change+0xfe/0x170 net/core/dev.c:1423
 linkwatch_do_dev+0x10d/0x160 net/core/link_watch.c:191
 __linkwatch_run_queue+0x417/0x670 net/core/link_watch.c:244
Modules linked in:
CPU: 0 PID: 5914 Comm: syz.0.17 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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+0x85f/0x8c0 mm/page_alloc.c:2365
 free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2504
 release_pages+0x1f7a/0x2200 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+0x3b9/0xfb0 mm/truncate.c:396
 jfs_remount+0x341/0x5b0 fs/jfs/super.c:451
 reconfigure_super+0x21e/0x8a0 fs/super.c:1151
 do_remount fs/namespace.c:2927 [inline]
 path_mount+0xd2f/0xff0 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+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7faff4b9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fff4e22b0a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007faff4e15fa0 RCX: 00007faff4b9c799
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007faff4c32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002236824 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faff4e15fac R14: 00007faff4e15fa0 R15: 00007faff4e15fa0
 </TASK>
BUG: Bad page state in process syz.0.17  pfn:2bf10
page:ffffea0000afc400 refcount:0 mapcount:0 mapping:0000000000000000 index:0x8ed2d pfn:0x2bf10
flags: 0xfff0000000800c(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0000000800c ffffea0000b18b48 ffffc900032f7940 0000000000000000
raw: 000000000008ed2d ffff8880311fc8b8 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 5914, tgid 5914 (syz.0.17), ts 106862193785, free_ts 106601875165
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
 prep_new_page mm/page_alloc.c:1588 [inline]
 get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2289
 filemap_alloc_folio+0xdf/0x490 mm/filemap.c:1004
 __filemap_get_folio+0x3ea/0xbb0 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+0x2a8/0xfa0 fs/jfs/jfs_metapage.c:613
 diNewExt+0xa82/0x3120 fs/jfs/jfs_imap.c:2275
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xea5/0x1da0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1d5/0x1660 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x950 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1df/0xac0 fs/jfs/namei.c:225
 vfs_mkdir+0x296/0x440 fs/namei.c:4121
 do_mkdirat+0x1dc/0x450 fs/namei.c:4144
 __do_sys_mkdirat fs/namei.c:4159 [inline]
 __se_sys_mkdirat fs/namei.c:4157 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1181 [inline]
 free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
 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+0x6e/0x4b0 mm/slab.h:767
 slab_alloc_node mm/slub.c:3495 [inline]
 kmem_cache_alloc_node+0x14c/0x320 mm/slub.c:3540
 __alloc_skb+0x103/0x2c0 net/core/skbuff.c:643
 alloc_skb include/linux/skbuff.h:1316 [inline]
 nlmsg_new include/net/netlink.h:1010 [inline]
 rtmsg_ifinfo_build_skb+0x8c/0x260 net/core/rtnetlink.c:4063
 rtmsg_ifinfo_event net/core/rtnetlink.c:4106 [inline]
 rtmsg_ifinfo+0x8c/0x1a0 net/core/rtnetlink.c:4115
 netdev_state_change+0xfe/0x170 net/core/dev.c:1423
 linkwatch_do_dev+0x10d/0x160 net/core/link_watch.c:191
 __linkwatch_run_queue+0x417/0x670 net/core/link_watch.c:244
Modules linked in:
CPU: 0 PID: 5914 Comm: syz.0.17 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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+0x85f/0x8c0 mm/page_alloc.c:2365
 free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2504
 release_pages+0x1f7a/0x2200 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+0x3b9/0xfb0 mm/truncate.c:396
 jfs_remount+0x341/0x5b0 fs/jfs/super.c:451
 reconfigure_super+0x21e/0x8a0 fs/super.c:1151
 do_remount fs/namespace.c:2927 [inline]
 path_mount+0xd2f/0xff0 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+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7faff4b9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fff4e22b0a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007faff4e15fa0 RCX: 00007faff4b9c799
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007faff4c32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002236824 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faff4e15fac R14: 00007faff4e15fa0 R15: 00007faff4e15fa0
 </TASK>
BUG: Bad page state in process syz.0.17  pfn:2c62d
page:ffffea0000b18b40 refcount:0 mapcount:0 mapping:0000000000000000 index:0xd pfn:0x2c62d
flags: 0xfff0800000820c(referenced|uptodate|workingset|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff0800000820c ffffea0001f2a1c8 ffffc900032f7940 0000000000000000
raw: 000000000000000d ffff8880311fc4d8 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 5914, tgid 5914 (syz.0.17), ts 106760280968, free_ts 106728733619
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
 prep_new_page mm/page_alloc.c:1588 [inline]
 get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2289
 filemap_alloc_folio+0xdf/0x490 mm/filemap.c:1004
 do_read_cache_folio+0x364/0x7d0 mm/filemap.c:3768
 do_read_cache_page+0x32/0x250 mm/filemap.c:3870
 read_mapping_page include/linux/pagemap.h:892 [inline]
 __get_metapage+0x31a/0xfa0 fs/jfs/jfs_metapage.c:620
 diReadSpecial+0x25b/0x710 fs/jfs/jfs_imap.c:447
 jfs_mount+0x3d1/0x860 fs/jfs/jfs_mount.c:166
 jfs_fill_super+0x4e8/0xad0 fs/jfs/super.c:556
 mount_bdev+0x221/0x2d0 fs/super.c:1643
 legacy_get_tree+0xea/0x180 fs/fs_context.c:662
 vfs_get_tree+0x8c/0x280 fs/super.c:1764
 do_new_mount+0x24b/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
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1181 [inline]
 free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
 free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2504
 release_pages+0x1f7a/0x2200 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+0xf9/0x220 mm/mmu_gather.c:425
 unmap_region+0x312/0x370 mm/mmap.c:2349
 do_vmi_align_munmap+0x10dc/0x16d0 mm/mmap.c:2592
 do_vmi_munmap+0x252/0x2d0 mm/mmap.c:2660
 __vm_munmap+0x1a2/0x3c0 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+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
Modules linked in:
CPU: 0 PID: 5914 Comm: syz.0.17 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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+0x85f/0x8c0 mm/page_alloc.c:2365
 free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2504
 release_pages+0x1f7a/0x2200 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+0x3b9/0xfb0 mm/truncate.c:396
 jfs_remount+0x341/0x5b0 fs/jfs/super.c:451
 reconfigure_super+0x21e/0x8a0 fs/super.c:1151
 do_remount fs/namespace.c:2927 [inline]
 path_mount+0xd2f/0xff0 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+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7faff4b9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fff4e22b0a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007faff4e15fa0 RCX: 00007faff4b9c799
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007faff4c32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002236824 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faff4e15fac R14: 00007faff4e15fa0 R15: 00007faff4e15fa0
 </TASK>

Crashes (1054):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2026/09/18 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
2026/09/12 02:42 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
2026/09/12 02:41 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
2026/09/11 12:38 linux-6.6.y 8b73de7da85f b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/10 12:44 linux-6.6.y 8b73de7da85f 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/10 04:05 linux-6.6.y 8b73de7da85f 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/09 18:46 linux-6.6.y 8b73de7da85f 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/09 05:57 linux-6.6.y 8b73de7da85f 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/08 17:30 linux-6.6.y 8b73de7da85f 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/07 23:16 linux-6.6.y 8b73de7da85f 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/02 05:13 linux-6.6.y a4a971135a2f 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/09/02 05:12 linux-6.6.y a4a971135a2f 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/08/24 08:29 linux-6.6.y dc6160265ffc 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/08/23 07:03 linux-6.6.y c610b395b0a5 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/08/20 08:15 linux-6.6.y c610b395b0a5 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/08/15 06:42 linux-6.6.y d27334b2888c 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/08/14 15:45 linux-6.6.y d27334b2888c 6f9b3e89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/08/14 12:53 linux-6.6.y d27334b2888c 6f9b3e89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/08/14 02:47 linux-6.6.y d27334b2888c b13552fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/08/07 21:25 linux-6.6.y 6436c12a2ced e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/08/07 04:03 linux-6.6.y 80dfb0405055 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/07/31 04:35 linux-6.6.y a1153c0deb44 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/07/31 04:34 linux-6.6.y a1153c0deb44 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/07/27 09:17 linux-6.6.y c5596480c50e 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/07/25 13:09 linux-6.6.y c5596480c50e 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/07/23 10:43 linux-6.6.y da47cbc25466 881ce5c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/07/18 23:40 linux-6.6.y da47cbc25466 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/07/18 03:03 linux-6.6.y da47cbc25466 8aaff637 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/07/07 05:55 linux-6.6.y da47cbc25466 8e71ce95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/07/06 02:39 linux-6.6.y da47cbc25466 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/07/04 15:42 linux-6.6.y da47cbc25466 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/06/30 08:10 linux-6.6.y d1cfde2d5d15 fff8d0a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/06/29 10:13 linux-6.6.y d1cfde2d5d15 fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/06/29 04:49 linux-6.6.y d1cfde2d5d15 fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/06/27 09:19 linux-6.6.y d1cfde2d5d15 fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/06/27 06:30 linux-6.6.y d1cfde2d5d15 fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/06/26 02:56 linux-6.6.y d1cfde2d5d15 7ff32d8b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan BUG: Bad page state in __get_metapage
2026/06/24 22:44 linux-6.6.y d1cfde2d5d15 302586aa .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.