BUG: spinlock bad magic on CPU#0, jfsCommit/104 ================================================================== BUG: KASAN: slab-out-of-bounds in string_nocheck lib/vsprintf.c:653 [inline] BUG: KASAN: slab-out-of-bounds in string+0x231/0x2b0 lib/vsprintf.c:735 Read of size 1 at addr ffff88801c12d2f8 by task jfsCommit/104 CPU: 0 UID: 0 PID: 104 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 string_nocheck lib/vsprintf.c:653 [inline] string+0x231/0x2b0 lib/vsprintf.c:735 vsnprintf+0x739/0xf00 lib/vsprintf.c:2926 vprintk_store+0x3c7/0xd00 kernel/printk/printk.c:2252 vprintk_emit+0x15f/0x590 kernel/printk/printk.c:2399 _printk+0xcf/0x120 kernel/printk/printk.c:2448 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:124 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline] release_metapage+0x13c/0xac0 fs/jfs/jfs_metapage.c:871 xtTruncate+0xe84/0x2e70 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:159 evict+0x504/0x9c0 fs/inode.c:810 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline] jfs_lazycommit+0x43f/0xa90 fs/jfs/jfs_txnmgr.c:2734 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff88801c12d268 which belongs to the cache jfs_ip of size 2216 The buggy address is located 144 bytes inside of allocated 2216-byte region [ffff88801c12d268, ffff88801c12db10) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c128 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88801e0b3001 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff8880327e7780 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff88801e0b3001 head: 00fff00000000040 ffff8880327e7780 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000000f5000000 ffff88801e0b3001 head: 00fff00000000003 ffffea0000704a01 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 5469, tgid 5469 (syz.0.17), ts 111034938139, free_ts 100360899811 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3055 [inline] allocate_slab+0x96/0x350 mm/slub.c:3228 new_slab mm/slub.c:3282 [inline] ___slab_alloc+0xe94/0x18a0 mm/slub.c:4651 __slab_alloc+0x65/0x100 mm/slub.c:4770 __slab_alloc_node mm/slub.c:4846 [inline] slab_alloc_node mm/slub.c:5268 [inline] kmem_cache_alloc_lru_noprof+0x3ef/0x6d0 mm/slub.c:5299 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x6a/0x1b0 fs/inode.c:346 new_inode+0x22/0x170 fs/inode.c:1145 jfs_fill_super+0x569/0xd80 fs/jfs/super.c:511 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 vfs_get_tree+0x92/0x2b0 fs/super.c:1751 fc_mount fs/namespace.c:1208 [inline] do_new_mount_fc fs/namespace.c:3651 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3727 do_mount fs/namespace.c:4050 [inline] __do_sys_mount fs/namespace.c:4238 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4215 page last free pid 5353 tgid 5353 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2906 __slab_free+0x2e7/0x390 mm/slub.c:5962 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4970 [inline] slab_alloc_node mm/slub.c:5280 [inline] __kmalloc_cache_noprof+0x36f/0x6f0 mm/slub.c:5758 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] mpls_add_dev net/mpls/af_mpls.c:1443 [inline] mpls_dev_notify+0x121/0x7a0 net/mpls/af_mpls.c:1600 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers net/core/dev.c:2281 [inline] register_netdevice+0x1608/0x1ae0 net/core/dev.c:11332 register_netdev+0x40/0x60 net/core/dev.c:11410 vti6_init_net+0x238/0x370 net/ipv6/ip6_vti.c:1158 ops_init+0x35c/0x5c0 net/core/net_namespace.c:137 setup_net+0xfe/0x320 net/core/net_namespace.c:445 copy_net_ns+0x34e/0x4e0 net/core/net_namespace.c:580 create_new_namespaces+0x3f3/0x720 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x11c/0x170 kernel/nsproxy.c:218 Memory state around the buggy address: ffff88801c12d180: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ffff88801c12d200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88801c12d280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801c12d300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801c12d380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================