syzbot has found a reproducer for the following issue on: HEAD commit: a6afa4199d3d Merge tag 'mailbox-v6.1' of git://git.linaro... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=13185e34880000 kernel config: https://syzkaller.appspot.com/x/.config?x=e2021a61197ebe02 dashboard link: https://syzkaller.appspot.com/bug?extid=97ef6376738cb5104a71 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11b84b5c880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1334d00c880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b8f297fb220e/disk-a6afa419.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9b6bc23e32ef/vmlinux-a6afa419.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/058bad60fb03/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+97ef6376738cb5104a71@xxxxxxxxxxxxxxxxxxxxxxxxx ERROR: (device loop0): remounting filesystem as read-only ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= BUG: Bad page state in process syz-executor306 pfn:70d41 page:ffffea0001c35040 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2f pfn:0x70d41 flags: 0xfff00000002006(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000002006 ffffea0001c35088 ffffea0001c355c8 0000000000000000 raw: 000000000000002f ffff88801fe96c98 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 0x40c40(GFP_NOFS|__GFP_COMP), pid 3602, tgid 3602 (syz-executor306), ts 38348851793, free_ts 30056820819 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270 folio_alloc+0x1c/0x70 mm/mempolicy.c:2280 filemap_alloc_folio+0x306/0x3a0 mm/filemap.c:970 __filemap_get_folio+0x328/0xed0 mm/filemap.c:1970 pagecache_get_page+0x2e/0x290 mm/folio-compat.c:104 find_or_create_page include/linux/pagemap.h:613 [inline] grab_cache_page include/linux/pagemap.h:743 [inline] __get_metapage+0x262/0xef0 fs/jfs/jfs_metapage.c:613 diNewExt+0x7e9/0x1a10 fs/jfs/jfs_imap.c:2265 diAllocExt fs/jfs/jfs_imap.c:1945 [inline] diAllocAG+0x15f1/0x2200 fs/jfs/jfs_imap.c:1662 diAlloc+0x82d/0x1730 fs/jfs/jfs_imap.c:1583 ialloc+0x89/0xaa0 fs/jfs/jfs_inode.c:56 jfs_mkdir+0x1f0/0xab0 fs/jfs/namei.c:225 vfs_mkdir+0x489/0x740 fs/namei.c:4013 do_mkdirat+0x28c/0x310 fs/namei.c:4038 __do_sys_mkdir fs/namei.c:4058 [inline] __se_sys_mkdir fs/namei.c:4056 [inline] __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4056 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476 __folio_put_small mm/swap.c:105 [inline] __folio_put+0xc1/0x130 mm/swap.c:128 folio_put include/linux/mm.h:1125 [inline] put_page include/linux/mm.h:1177 [inline] anon_pipe_buf_release+0x3f7/0x4b0 fs/pipe.c:138 pipe_buf_release include/linux/pipe_fs_i.h:183 [inline] pipe_read+0x610/0x1100 fs/pipe.c:324 call_read_iter include/linux/fs.h:2184 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7f6/0x930 fs/read_write.c:470 ksys_read+0x1e8/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Modules linked in: CPU: 0 PID: 3602 Comm: syz-executor306 Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 bad_page.cold+0x9c/0xbd mm/page_alloc.c:716 check_free_page_bad mm/page_alloc.c:1288 [inline] check_free_page mm/page_alloc.c:1298 [inline] free_pages_prepare mm/page_alloc.c:1443 [inline] free_pcp_prepare+0x6bd/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page_list+0x16f/0xb90 mm/page_alloc.c:3522 release_pages+0xbd3/0x1400 mm/swap.c:1012 __pagevec_release+0x77/0x100 mm/swap.c:1032 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] truncate_inode_pages_range+0x318/0x1510 mm/truncate.c:373 jfs_remount+0x4bd/0x640 fs/jfs/super.c:451 legacy_reconfigure+0x115/0x180 fs/fs_context.c:633 reconfigure_super+0x408/0xa30 fs/super.c:934 do_remount fs/namespace.c:2702 [inline] path_mount+0x182c/0x1e20 fs/namespace.c:3362 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc67425cb39 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcf34ad8f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc67425cb39 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007ffcf34ad920 R08: 0000000000000000 R09: 0000000032303633 R10: 0000000000000060 R11: 0000000000000246 R12: 00007ffcf34ada00 R13: 0000001200030083 R14: 0000000000000000 R15: 0000000000000000 </TASK> BUG: Bad page state in process syz-executor306 pfn:70d42 page:ffffea0001c35080 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2e pfn:0x70d42 flags: 0xfff00000002006(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000002006 ffffea0001c350c8 ffffea0001c355c8 0000000000000000 raw: 000000000000002e ffff88801fe96ba0 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 0x40c40(GFP_NOFS|__GFP_COMP), pid 3602, tgid 3602 (syz-executor306), ts 38348835963, free_ts 30056827399 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270 folio_alloc+0x1c/0x70 mm/mempolicy.c:2280 filemap_alloc_folio+0x306/0x3a0 mm/filemap.c:970 __filemap_get_folio+0x328/0xed0 mm/filemap.c:1970 pagecache_get_page+0x2e/0x290 mm/folio-compat.c:104 find_or_create_page include/linux/pagemap.h:613 [inline] grab_cache_page include/linux/pagemap.h:743 [inline] __get_metapage+0x262/0xef0 fs/jfs/jfs_metapage.c:613 diNewExt+0x7e9/0x1a10 fs/jfs/jfs_imap.c:2265 diAllocExt fs/jfs/jfs_imap.c:1945 [inline] diAllocAG+0x15f1/0x2200 fs/jfs/jfs_imap.c:1662 diAlloc+0x82d/0x1730 fs/jfs/jfs_imap.c:1583 ialloc+0x89/0xaa0 fs/jfs/jfs_inode.c:56 jfs_mkdir+0x1f0/0xab0 fs/jfs/namei.c:225 vfs_mkdir+0x489/0x740 fs/namei.c:4013 do_mkdirat+0x28c/0x310 fs/namei.c:4038 __do_sys_mkdir fs/namei.c:4058 [inline] __se_sys_mkdir fs/namei.c:4056 [inline] __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4056 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476 __folio_put_small mm/swap.c:105 [inline] __folio_put+0xc1/0x130 mm/swap.c:128 folio_put include/linux/mm.h:1125 [inline] put_page include/linux/mm.h:1177 [inline] anon_pipe_buf_release+0x3f7/0x4b0 fs/pipe.c:138 pipe_buf_release include/linux/pipe_fs_i.h:183 [inline] pipe_read+0x610/0x1100 fs/pipe.c:324 call_read_iter include/linux/fs.h:2184 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7f6/0x930 fs/read_write.c:470 ksys_read+0x1e8/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Modules linked in: CPU: 0 PID: 3602 Comm: syz-executor306 Tainted: G B 6.0.0-syzkaller-09039-ga6afa4199d3d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 bad_page.cold+0x9c/0xbd mm/page_alloc.c:716 check_free_page_bad mm/page_alloc.c:1288 [inline] check_free_page mm/page_alloc.c:1298 [inline] free_pages_prepare mm/page_alloc.c:1443 [inline] free_pcp_prepare+0x6bd/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page_list+0x16f/0xb90 mm/page_alloc.c:3522 release_pages+0xbd3/0x1400 mm/swap.c:1012 __pagevec_release+0x77/0x100 mm/swap.c:1032 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] truncate_inode_pages_range+0x318/0x1510 mm/truncate.c:373 jfs_remount+0x4bd/0x640 fs/jfs/super.c:451 legacy_reconfigure+0x115/0x180 fs/fs_context.c:633 reconfigure_super+0x408/0xa30 fs/super.c:934 do_remount fs/namespace.c:2702 [inline] path_mount+0x182c/0x1e20 fs/namespace.c:3362 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc67425cb39 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcf34ad8f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc67425cb39 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007ffcf34ad920 R08: 0000000000000000 R09: 0000000032303633 R10: 0000000000000060 R11: 0000000000000246 R12: 00007ffcf34ada00 R13: 0000001200030083 R14: 0000000000000000 R15: 0000000000000000 </TASK> BUG: Bad page state in process syz-executor306 pfn:70d43 page:ffffea0001c350c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2d pfn:0x70d43 flags: 0xfff00000002006(referenced|uptodate|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000002006 ffffea0001c34ec8 ffffea0001c355c8 0000000000000000 raw: 000000000000002d ffff88801fe96aa8 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 0x40c40(GFP_NOFS|__GFP_COMP), pid 3602, tgid 3602 (syz-executor306), ts 38348815033, free_ts 30056832129 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270 folio_alloc+0x1c/0x70 mm/mempolicy.c:2280 filemap_alloc_folio+0x306/0x3a0 mm/filemap.c:970 __filemap_get_folio+0x328/0xed0 mm/filemap.c:1970 pagecache_get_page+0x2e/0x290 mm/folio-compat.c:104 find_or_create_page include/linux/pagemap.h:613 [inline] grab_cache_page include/linux/pagemap.h:743 [inline] __get_metapage+0x262/0xef0 fs/jfs/jfs_metapage.c:613 diNewExt+0x7e9/0x1a10 fs/jfs/jfs_imap.c:2265 diAllocExt fs/jfs/jfs_imap.c:1945 [inline] diAllocAG+0x15f1/0x2200 fs/jfs/jfs_imap.c:1662 diAlloc+0x82d/0x1730 fs/jfs/jfs_imap.c:1583 ialloc+0x89/0xaa0 fs/jfs/jfs_inode.c:56 jfs_mkdir+0x1f0/0xab0 fs/jfs/namei.c:225 vfs_mkdir+0x489/0x740 fs/namei.c:4013 do_mkdirat+0x28c/0x310 fs/namei.c:4038 __do_sys_mkdir fs/namei.c:4058 [inline] __se_sys_mkdir fs/namei.c:4056 [inline] __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4056 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476 __folio_put_small mm/swap.c:105 [inline] __folio_put+0xc1/0x130 mm/swap.c:128 folio_put include/linux/mm.h:1125 [inline] put_page include/linux/mm.h:1177 [inline] anon_pipe_buf_release+0x3f7/0x4b0 fs/pipe.c:138 pipe_buf_release include/linux/pipe_fs_i.h:183 [inline] pipe_read+0x610/0x1100 fs/pipe.c:324 call_read_iter include/linux/fs.h:2184 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7f6/0x930 fs/read_write.c:470 ksys_read+0x1e8/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Modules linked in: CPU: 1 PID: 3602 Comm: syz-executor306 Tainted: G B 6.0.0-syzkaller-09039-ga6afa4199d3d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 bad_page.cold+0x9c/0xbd mm/page_alloc.c:716 check_free_page_bad mm/page_alloc.c:1288 [inline] check_free_page mm/page_alloc.c:1298 [inline] free_pages_prepare mm/page_alloc.c:1443 [inline] free_pcp_prepare+0x6bd/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page_list+0x16f/0xb90 mm/page_alloc.c:3522 release_pages+0xbd3/0x1400 mm/swap.c:1012 __pagevec_release+0x77/0x100 mm/swap.c:1032 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] truncate_inode_pages_range+0x318/0x1510 mm/truncate.c:373 jfs_remount+0x4bd/0x640 fs/jfs/super.c:451 legacy_reconfigure+0x115/0x180 fs/fs_context.c:633 reconfigure_super+0x408/0xa30 fs/super.c:934 do_remount fs/namespace.c:2702 [inline] path_mount+0x182c/0x1e20 fs/namespace.c:3362 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc67425cb39 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcf34ad8f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc
