BUG: spinlock bad magic on CPU#1, jfsCommit/115 ================================================================== BUG: KASAN: slab-out-of-bounds in string_nocheck lib/vsprintf.c:639 [inline] BUG: KASAN: slab-out-of-bounds in string+0x231/0x2b0 lib/vsprintf.c:721 Read of size 1 at addr ffff88804d363790 by task jfsCommit/115 CPU: 1 UID: 0 PID: 115 Comm: jfsCommit Not tainted 6.15.0-rc5-syzkaller-00300-g3ce9925823c7 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xb4/0x290 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 string_nocheck lib/vsprintf.c:639 [inline] string+0x231/0x2b0 lib/vsprintf.c:721 vsnprintf+0x739/0xf00 lib/vsprintf.c:2852 vprintk_store+0x3c7/0xd00 kernel/printk/printk.c:2279 vprintk_emit+0x21e/0x7a0 kernel/printk/printk.c:2426 _printk+0xcf/0x120 kernel/printk/printk.c:2475 spin_dump+0x102/0x1a0 kernel/locking/spinlock_debug.c:64 spin_bug kernel/locking/spinlock_debug.c:78 [inline] debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] do_raw_spin_lock+0x1ca/0x290 kernel/locking/spinlock_debug.c:115 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0xb3/0xf0 kernel/locking/spinlock.c:162 __wake_up_common_lock+0x2f/0x1f0 kernel/sched/wait.c:105 unlock_metapage fs/jfs/jfs_metapage.c:39 [inline] release_metapage+0x13c/0xac0 fs/jfs/jfs_metapage.c:763 xtTruncate+0xe71/0x2dd0 fs/jfs/jfs_xtree.c:-1 jfs_free_zero_link+0x33a/0x4a0 fs/jfs/namei.c:759 jfs_evict_inode+0x363/0x440 fs/jfs/inode.c:153 evict+0x501/0x9c0 fs/inode.c:810 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline] jfs_lazycommit+0x43f/0xa90 fs/jfs/jfs_txnmgr.c:2733 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff88804d363750 which belongs to the cache jfs_ip of size 2232 The buggy address is located 64 bytes inside of allocated 2232-byte region [ffff88804d363750, ffff88804d364008) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88804d361270 pfn:0x4d360 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888026ef8301 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801bba9dc0 dead000000000122 0000000000000000 raw: ffff88804d361270 00000000800d000a 00000000f5000000 ffff888026ef8301 head: 00fff00000000040 ffff88801bba9dc0 dead000000000122 0000000000000000 head: ffff88804d361270 00000000800d000a 00000000f5000000 ffff888026ef8301 head: 00fff00000000003 ffffea000134d801 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8188, tgid 8187 (syz.2.250), ts 245973281877, free_ts 225688213988 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1718 prep_new_page mm/page_alloc.c:1726 [inline] get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3688 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4970 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2301 alloc_slab_page mm/slub.c:2450 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2618 new_slab mm/slub.c:2672 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3858 __slab_alloc mm/slub.c:3948 [inline] __slab_alloc_node mm/slub.c:4023 [inline] slab_alloc_node mm/slub.c:4184 [inline] kmem_cache_alloc_lru_noprof+0x288/0x3d0 mm/slub.c:4215 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x67/0x1b0 fs/inode.c:346 new_inode+0x22/0x170 fs/inode.c:1145 ialloc+0x4c/0x8f0 fs/jfs/jfs_inode.c:48 jfs_mkdir+0x193/0xa70 fs/jfs/namei.c:225 vfs_mkdir+0x303/0x510 fs/namei.c:4359 do_mkdirat+0x247/0x590 fs/namei.c:4392 __do_sys_mkdirat fs/namei.c:4409 [inline] __se_sys_mkdirat fs/namei.c:4407 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4407 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 page last free pid 5190 tgid 5190 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2725 discard_slab mm/slub.c:2716 [inline] __put_partials+0x161/0x1c0 mm/slub.c:3185 put_cpu_partial+0x17c/0x250 mm/slub.c:3260 __slab_free+0x2f7/0x400 mm/slub.c:4512 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4147 [inline] slab_alloc_node mm/slub.c:4196 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4203 getname_flags+0xb8/0x540 fs/namei.c:146 getname include/linux/fs.h:2852 [inline] getname_maybe_null include/linux/fs.h:2859 [inline] vfs_fstatat+0x43/0x160 fs/stat.c:367 __do_sys_newfstatat fs/stat.c:536 [inline] __se_sys_newfstatat fs/stat.c:530 [inline] __x64_sys_newfstatat+0x11c/0x1a0 fs/stat.c:530 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88804d363680: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ffff88804d363700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88804d363780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88804d363800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804d363880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================