================================================================== BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x271/0x2c0 kernel/locking/spinlock_debug.c:115 Read of size 4 at addr ffff888053be78c4 by task jfsCommit/135 CPU: 3 PID: 135 Comm: jfsCommit Not tainted 6.10.0-rc2-syzkaller-00366-g771ed66105de #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] do_raw_spin_lock+0x271/0x2c0 kernel/locking/spinlock_debug.c:115 __mutex_lock_common kernel/locking/mutex.c:622 [inline] __mutex_lock+0x264/0x9c0 kernel/locking/mutex.c:752 jfs_syncpt+0x2a/0xa0 fs/jfs/jfs_logmgr.c:1039 txEnd+0x30d/0x5a0 fs/jfs/jfs_txnmgr.c:549 txLazyCommit fs/jfs/jfs_txnmgr.c:2684 [inline] jfs_lazycommit+0x77b/0xb20 fs/jfs/jfs_txnmgr.c:2733 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 1090: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] open_inline_log fs/jfs/jfs_logmgr.c:1159 [inline] lmLogOpen+0x568/0x1400 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0x2ea/0x700 fs/jfs/jfs_mount.c:257 jfs_fill_super+0x9d6/0xd20 fs/jfs/super.c:565 mount_bdev+0x1e3/0x2d0 fs/super.c:1659 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 477: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4437 [inline] kfree+0x12a/0x3b0 mm/slub.c:4558 lmLogClose+0x585/0x710 fs/jfs/jfs_logmgr.c:1461 jfs_umount+0x2f0/0x440 fs/jfs/jfs_umount.c:114 jfs_put_super+0x88/0x1d0 fs/jfs/super.c:194 generic_shutdown_super+0x159/0x3d0 fs/super.c:642 kill_block_super+0x3b/0x90 fs/super.c:1676 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888053be7800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 196 bytes inside of freed 1024-byte region [ffff888053be7800, ffff888053be7c00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x53be0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff888015442dc0 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000100010 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888015442dc0 0000000000000000 dead000000000001 head: 0000000000000000 0000000000100010 00000001ffffefff 0000000000000000 head: 00fff00000000003 ffffea00014ef801 ffffffffffffffff 0000000000000000 head: ffff888000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 0, tgid 0 (swapper/1), ts 1126594102695, free_ts 1095968678009 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x56/0x110 mm/slub.c:2265 allocate_slab mm/slub.c:2428 [inline] new_slab+0x84/0x260 mm/slub.c:2481 ___slab_alloc+0xdac/0x1870 mm/slub.c:3667 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3989 [inline] __do_kmalloc_node mm/slub.c:4121 [inline] __kmalloc_noprof+0x36d/0x410 mm/slub.c:4135 kmalloc_noprof include/linux/slab.h:664 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] neigh_alloc net/core/neighbour.c:494 [inline] ___neigh_create+0x152b/0x2ae0 net/core/neighbour.c:648 ip6_finish_output2+0x112f/0x18b0 net/ipv6/ip6_output.c:128 __ip6_finish_output net/ipv6/ip6_output.c:211 [inline] ip6_finish_output+0x3f9/0x1300 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x1f8/0x540 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xa2d/0x1c30 net/ipv6/ndisc.c:509 ndisc_send_rs+0x12b/0x690 net/ipv6/ndisc.c:719 addrconf_rs_timer+0x422/0x850 net/ipv6/addrconf.c:4039 call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1792 page last free pid 5208 tgid 5194 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2583 __put_partials+0x14c/0x170 mm/slub.c:2995 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmem_cache_alloc_node_noprof+0x153/0x310 mm/slub.c:4044 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:656 alloc_skb_fclone include/linux/skbuff.h:1358 [inline] tcp_stream_alloc_skb+0x34/0x570 net/ipv4/tcp.c:879 tcp_sendmsg_locked+0xecc/0x3550 net/ipv4/tcp.c:1161 tcp_sendmsg+0x2e/0x50 net/ipv4/tcp.c:1351 inet_sendmsg+0xb9/0x140 net/ipv4/af_inet.c:853 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x4b8/0x5c0 net/socket.c:1160 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6b6/0x1140 fs/read_write.c:590 ksys_write+0x1f8/0x260 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888053be7780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888053be7800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888053be7880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888053be7900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888053be7980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================