BUG: Bad page state in process jfsCommit pfn:114830 page:0000000055b0e5ea refcount:0 mapcount:0 mapping:0000000000000000 index:0x1c pfn:0x114830 flags: 0x5ffc00000002007(locked|referenced|uptodate|private|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000002007 dead000000000100 dead000000000122 0000000000000000 raw: 000000000000001c ffff0000c2e75000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set Modules linked in: CPU: 1 PID: 239 Comm: jfsCommit Not tainted 5.15.171-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 bad_page+0x1a4/0x1c4 mm/page_alloc.c:652 check_free_page_bad mm/page_alloc.c:1199 [inline] check_free_page mm/page_alloc.c:1209 [inline] free_pages_prepare mm/page_alloc.c:1334 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x4ec/0xe30 mm/page_alloc.c:3317 free_unref_page+0x78/0x204 mm/page_alloc.c:3396 __put_single_page mm/swap.c:98 [inline] __put_page+0xf8/0x134 mm/swap.c:129 put_page include/linux/mm.h:1247 [inline] _metapage_homeok+0x138/0x288 fs/jfs/jfs_metapage.h:119 txUnlock+0x264/0xbb0 fs/jfs/jfs_txnmgr.c:932 txLazyCommit fs/jfs/jfs_txnmgr.c:2716 [inline] jfs_lazycommit+0x4a0/0xa40 fs/jfs/jfs_txnmgr.c:2766 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 page:0000000055b0e5ea refcount:0 mapcount:0 mapping:0000000000000000 index:0x1c pfn:0x114830 flags: 0x5ffc00000002007(locked|referenced|uptodate|private|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000002007 dead000000000100 dead000000000122 0000000000000000 raw: 000000000000001c ffff0000c2e75000 00000000ffffffff 0000000000000000 page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u)) ------------[ cut here ]------------ kernel BUG at include/linux/mm.h:1213! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 239 Comm: jfsCommit Tainted: G B 5.15.171-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : get_page include/linux/mm.h:1213 [inline] pc : put_metapage+0x280/0x2e4 fs/jfs/jfs_metapage.c:722 lr : get_page include/linux/mm.h:1213 [inline] lr : put_metapage+0x280/0x2e4 fs/jfs/jfs_metapage.c:722 sp : ffff80001f917b80 x29: ffff80001f917b80 x28: dfff800000000000 x27: 1fffe000185cea05 x26: 1fffe000185cea12 x25: dfff800000000000 x24: 000000000000007f x23: fffffc0003520c34 x22: fffffc0003520c00 x21: ffff0000c2e75028 x20: ffff0000c2e75090 x19: ffff0000c2e75000 x18: 1fffe0003683178e x17: 1fffe0003683178e x16: ffff800011ac0310 x15: ffff800014b6fa40 x14: ffff0001b418bc80 x13: ffff0001b418bc7c x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : 623bf236716f7200 x8 : 623bf236716f7200 x7 : 0000000000000000 x6 : ffff80000826abc8 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80000a983ebc x2 : ffff0001b418bd10 x1 : 0000000100000000 x0 : 0000000000000059 Call trace: get_page include/linux/mm.h:1213 [inline] put_metapage+0x280/0x2e4 fs/jfs/jfs_metapage.c:722 txUnlock+0x3e4/0xbb0 fs/jfs/jfs_txnmgr.c:947 txLazyCommit fs/jfs/jfs_txnmgr.c:2716 [inline] jfs_lazycommit+0x4a0/0xa40 fs/jfs/jfs_txnmgr.c:2766 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Code: b00433a1 91158021 aa1603e0 97bb1e2c (d4210000) ---[ end trace 3aee1d9ffd0c7316 ]---