loop8: detected capacity change from 0 to 32768
BUG: Bad page state in process syz.8.300  pfn:10c3b5
page:000000000dbfea8b refcount:0 mapcount:0 mapping:0000000000000000 index:0x4 pfn:0x10c3b5
flags: 0x5ffc60000002046(referenced|uptodate|workingset|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc60000002046 fffffc0003b94208 ffff800021817600 0000000000000000
raw: 0000000000000004 ffff0000e212f2e8 00000000ffffffff 0000000000000000
page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
Modules linked in:
CPU: 1 PID: 6518 Comm: syz.8.300 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 bad_page+0x188/0x1a8 mm/page_alloc.c:726
 free_page_is_bad_report+0xf8/0x170 mm/page_alloc.c:1308
 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+0x638/0xb24 mm/page_alloc.c:3414
 free_unref_page_list+0xd8/0x8dc mm/page_alloc.c:3555
 release_pages+0xdac/0xfdc mm/swap.c:1035
 __pagevec_release+0x84/0xf8 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+0x2dc/0xd48 mm/truncate.c:397
 truncate_inode_pages+0x2c/0x3c mm/truncate.c:476
 jfs_mount_rw+0x218/0x52c fs/jfs/jfs_mount.c:236
 jfs_remount+0x2c4/0x490 fs/jfs/super.c:454
 legacy_reconfigure+0xfc/0x114 fs/fs_context.c:655
 reconfigure_super+0x1d4/0x7cc fs/super.c:977
 do_remount fs/namespace.c:2741 [inline]
 path_mount+0xc98/0xe6c fs/namespace.c:3400
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount fs/namespace.c:3606 [inline]
 __arm64_sys_mount+0x4a0/0x5a0 fs/namespace.c:3606
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
BUG: Bad page state in process syz.8.300  pfn:12e508
page:0000000051d4ab21 refcount:0 mapcount:0 mapping:0000000000000000 index:0x3 pfn:0x12e508
flags: 0x5ffc60000002046(referenced|uptodate|workingset|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc60000002046 fffffc0003cea048 ffff800021817600 0000000000000000
raw: 0000000000000003 ffff0000e212f1f0 00000000ffffffff 0000000000000000
page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
Modules linked in:
CPU: 1 PID: 6518 Comm: syz.8.300 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 bad_page+0x188/0x1a8 mm/page_alloc.c:726
 free_page_is_bad_report+0xf8/0x170 mm/page_alloc.c:1308
 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+0x638/0xb24 mm/page_alloc.c:3414
 free_unref_page_list+0xd8/0x8dc mm/page_alloc.c:3555
 release_pages+0xdac/0xfdc mm/swap.c:1035
 __pagevec_release+0x84/0xf8 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+0x2dc/0xd48 mm/truncate.c:397
 truncate_inode_pages+0x2c/0x3c mm/truncate.c:476
 jfs_mount_rw+0x218/0x52c fs/jfs/jfs_mount.c:236
 jfs_remount+0x2c4/0x490 fs/jfs/super.c:454
 legacy_reconfigure+0xfc/0x114 fs/fs_context.c:655
 reconfigure_super+0x1d4/0x7cc fs/super.c:977
 do_remount fs/namespace.c:2741 [inline]
 path_mount+0xc98/0xe6c fs/namespace.c:3400
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount fs/namespace.c:3606 [inline]
 __arm64_sys_mount+0x4a0/0x5a0 fs/namespace.c:3606
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

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