loop4: detected capacity change from 0 to 512 EXT4-fs (loop4): encrypted files will use data=ordered instead of data journaling mode ================================================================== BUG: KASAN: slab-use-after-free in lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 Read of size 8 at addr ffff888029f02b60 by task syz-executor.4/7813 CPU: 0 PID: 7813 Comm: syz-executor.4 Not tainted 6.3.0-rc4-next-20230329-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 wq_init_lockdep kernel/workqueue.c:3604 [inline] alloc_workqueue+0x3f8/0x1110 kernel/workqueue.c:4476 __ext4_fill_super fs/ext4/super.c:5363 [inline] ext4_fill_super+0x6d06/0xad90 fs/ext4/super.c:5637 get_tree_bdev+0x444/0x760 fs/super.c:1303 vfs_get_tree+0x8d/0x350 fs/super.c:1510 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x134b/0x1e40 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7b8568d62a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7b8649af88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000042d RCX: 00007f7b8568d62a RDX: 0000000020000440 RSI: 0000000020000480 RDI: 00007f7b8649afe0 RBP: 00007f7b8649b020 R08: 00007f7b8649b020 R09: 000000000000001e R10: 000000000000001e R11: 0000000000000202 R12: 0000000020000440 R13: 0000000020000480 R14: 00007f7b8649afe0 R15: 0000000020000000 Allocated by task 9: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node_track_caller+0x5f/0x1a0 mm/slab_common.c:986 kmalloc_reserve+0xf0/0x270 net/core/skbuff.c:535 __alloc_skb+0x129/0x330 net/core/skbuff.c:604 alloc_skb include/linux/skbuff.h:1269 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline] nsim_dev_trap_report_work+0x2b1/0xc80 drivers/net/netdevsim/dev.c:853 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Freed by task 9: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800 skb_kfree_head net/core/skbuff.c:856 [inline] skb_free_head+0x108/0x1a0 net/core/skbuff.c:868 skb_release_data+0x57a/0x820 net/core/skbuff.c:897 skb_release_all net/core/skbuff.c:962 [inline] __kfree_skb net/core/skbuff.c:976 [inline] consume_skb net/core/skbuff.c:1189 [inline] consume_skb+0xd0/0x170 net/core/skbuff.c:1183 nsim_dev_trap_report drivers/net/netdevsim/dev.c:824 [inline] nsim_dev_trap_report_work+0x87c/0xc80 drivers/net/netdevsim/dev.c:853 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff888029f02000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2912 bytes inside of freed 4096-byte region [ffff888029f02000, ffff888029f03000) The buggy address belongs to the physical page: page:ffffea0000a7c000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29f00 head:ffffea0000a7c000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012442140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001ffffffff 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 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 9, tgid 9 (kworker/0:1), ts 552697777235, free_ts 552669037608 prep_new_page mm/page_alloc.c:1729 [inline] get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x28e/0x380 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc_node_track_caller+0x4f/0x1a0 mm/slab_common.c:986 kmalloc_reserve+0xf0/0x270 net/core/skbuff.c:535 __alloc_skb+0x129/0x330 net/core/skbuff.c:604 alloc_skb include/linux/skbuff.h:1269 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline] nsim_dev_trap_report_work+0x2b1/0xc80 drivers/net/netdevsim/dev.c:853 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x4d8/0xb80 mm/page_alloc.c:2555 free_unref_page+0x33/0x370 mm/page_alloc.c:2650 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x17c/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc_node+0x51/0x1a0 mm/slab_common.c:973 kmalloc_array_node include/linux/slab.h:657 [inline] kcalloc_node include/linux/slab.h:662 [inline] memcg_alloc_slab_cgroups+0x8f/0x150 mm/memcontrol.c:2900 account_slab mm/slab.h:597 [inline] allocate_slab+0x2d3/0x380 mm/slub.c:2016 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc_node+0x51/0x1a0 mm/slab_common.c:973 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0xa2/0x1a0 mm/util.c:604 kvmalloc include/linux/slab.h:697 [inline] seq_buf_alloc fs/seq_file.c:38 [inline] seq_read_iter+0x7fb/0x12d0 fs/seq_file.c:210 Memory state around the buggy address: ffff888029f02a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888029f02a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888029f02b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888029f02b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888029f02c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================