ubi0: attaching mtd0 ubi0: scanning is finished ================================================================== BUG: KASAN: slab-use-after-free in notifier_chain_register+0x528/0x61a kernel/notifier.c:27 Read of size 4 at addr ff600000305998e0 by task syz.0.6490/23888 CPU: 1 UID: 0 PID: 23888 Comm: syz.0.6490 Not tainted 6.13.0-rc3-syzkaller-g6f6ecce59d99 #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132 [] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138 [] __dump_stack lib/dump_stack.c:94 [inline] [] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120 [] print_address_description mm/kasan/report.c:378 [inline] [] print_report+0x28e/0x5aa mm/kasan/report.c:489 [] kasan_report+0xec/0x118 mm/kasan/report.c:602 [] __asan_report_load4_noabort+0x12/0x1a mm/kasan/report_generic.c:380 [] notifier_chain_register+0x528/0x61a kernel/notifier.c:27 [] __blocking_notifier_chain_register kernel/notifier.c:264 [inline] [] blocking_notifier_chain_register+0x80/0xc6 kernel/notifier.c:282 [] register_reboot_notifier+0x22/0x2c kernel/reboot.c:118 [] ubi_wl_init+0xd0a/0x15c2 drivers/mtd/ubi/wl.c:1960 [] ubi_attach+0x15da/0x4f90 drivers/mtd/ubi/attach.c:1605 [] ubi_attach_mtd_dev+0x14d8/0x3646 drivers/mtd/ubi/build.c:1004 [] ctrl_cdev_ioctl+0x496/0x764 drivers/mtd/ubi/cdev.c:1043 [] vfs_ioctl fs/ioctl.c:51 [inline] [] __do_sys_ioctl fs/ioctl.c:906 [inline] [] __se_sys_ioctl fs/ioctl.c:892 [inline] [] __riscv_sys_ioctl+0x18e/0x1e2 fs/ioctl.c:892 [] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90 [] do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331 [] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197 Allocated by task 23182: stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x6a mm/kasan/common.c:47 kasan_save_track+0x16/0x28 mm/kasan/common.c:68 kasan_save_alloc_info+0x30/0x3e mm/kasan/generic.c:568 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xa0/0xa6 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4298 [inline] __kmalloc_node_track_caller_noprof+0x258/0x5e8 mm/slub.c:4317 kmalloc_reserve+0xfe/0x2be net/core/skbuff.c:609 __alloc_skb+0x152/0x42a net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [inline] nlmsg_new include/net/netlink.h:1018 [inline] nf_tables_rule_notify+0xea/0x60a net/netfilter/nf_tables_api.c:3644 nf_tables_commit+0x173e/0x5e16 net/netfilter/nf_tables_api.c:10754 nfnetlink_rcv_batch+0xbc2/0x22d0 net/netfilter/nfnetlink.c:574 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:647 [inline] nfnetlink_rcv+0x3d6/0x436 net/netfilter/nfnetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0x4f0/0x82c net/netlink/af_netlink.c:1347 netlink_sendmsg+0x864/0xdc6 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0xcc/0x160 net/socket.c:726 ____sys_sendmsg+0x5ce/0x79e net/socket.c:2583 ___sys_sendmsg+0x144/0x1e6 net/socket.c:2637 __sys_sendmsg+0x188/0x22a net/socket.c:2669 __do_sys_sendmsg net/socket.c:2674 [inline] __se_sys_sendmsg net/socket.c:2672 [inline] __riscv_sys_sendmsg+0x70/0xa2 net/socket.c:2672 syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90 do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331 handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197 Freed by task 23182: stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x6a mm/kasan/common.c:47 kasan_save_track+0x16/0x28 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x5c mm/kasan/generic.c:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x4e/0x68 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4613 [inline] kfree+0x13e/0x508 mm/slub.c:4761 skb_kfree_head net/core/skbuff.c:1086 [inline] skb_free_head+0x22c/0x2e8 net/core/skbuff.c:1098 pskb_expand_head+0x36c/0x108c net/core/skbuff.c:2307 netlink_trim+0x1de/0x22e net/netlink/af_netlink.c:1303 netlink_unicast+0xec/0x82c net/netlink/af_netlink.c:1337 nlmsg_unicast include/net/netlink.h:1161 [inline] nlmsg_notify+0x1d0/0x22a net/netlink/af_netlink.c:2593 nfnetlink_send+0x5c/0x7a net/netfilter/nfnetlink.c:181 nft_commit_notify net/netfilter/nf_tables_api.c:10476 [inline] nf_tables_commit+0x1f74/0x5e16 net/netfilter/nf_tables_api.c:10889 nfnetlink_rcv_batch+0xbc2/0x22d0 net/netfilter/nfnetlink.c:574 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:647 [inline] nfnetlink_rcv+0x3d6/0x436 net/netfilter/nfnetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0x4f0/0x82c net/netlink/af_netlink.c:1347 netlink_sendmsg+0x864/0xdc6 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0xcc/0x160 net/socket.c:726 ____sys_sendmsg+0x5ce/0x79e net/socket.c:2583 ___sys_sendmsg+0x144/0x1e6 net/socket.c:2637 __sys_sendmsg+0x188/0x22a net/socket.c:2669 __do_sys_sendmsg net/socket.c:2674 [inline] __se_sys_sendmsg net/socket.c:2672 [inline] __riscv_sys_sendmsg+0x70/0xa2 net/socket.c:2672 syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90 do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331 handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197 The buggy address belongs to the object at ff60000030598000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 6368 bytes inside of freed 8192-byte region [ff60000030598000, ff6000003059a000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xff60000030598000 pfn:0xb0598 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 ksm flags: 0xffe000000000040(head|node=0|zone=0|lastcpupid=0x7ff) page_type: f5(slab) raw: 0ffe000000000040 ff60000011402280 ff1c000000644000 dead000000000003 raw: ff60000030598000 0000000000020001 00000001f5000000 0000000000000000 head: 0ffe000000000040 ff60000011402280 ff1c000000644000 dead000000000003 head: ff60000030598000 0000000000020001 00000001f5000000 0000000000000000 head: 0ffe000000000003 ff1c000000c16601 ffffffffffffffff 0000000000000000 head: 0000000000000008 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7525, tgid 7524 (syz.0.669), ts 1533617501800, free_ts 832105485500 __set_page_owner+0xa2/0x70c mm/page_owner.c:320 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xf0/0x1e8 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0xdb0/0x2c0e mm/page_alloc.c:3474 __alloc_pages_noprof+0x1e8/0x1fc2 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0xf8/0x488 mm/mempolicy.c:2269 alloc_pages_noprof+0x174/0x2f0 mm/mempolicy.c:2348 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab mm/slub.c:2589 [inline] new_slab+0x2b6/0x40e mm/slub.c:2642 ___slab_alloc+0x9c8/0x10e6 mm/slub.c:3830 __slab_alloc.constprop.0+0x60/0xb0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_node_track_caller_noprof+0x1dc/0x5e8 mm/slub.c:4317 __do_krealloc mm/slub.c:4824 [inline] krealloc_noprof+0x13e/0x350 mm/slub.c:4877 copy_array.constprop.0+0x78/0xca kernel/bpf/verifier.c:1227 copy_stack_state kernel/bpf/verifier.c:1282 [inline] copy_func_state kernel/bpf/verifier.c:1464 [inline] copy_verifier_state+0x7d2/0xc06 kernel/bpf/verifier.c:1503 push_stack+0x1a0/0x5b8 kernel/bpf/verifier.c:1766 check_cond_jmp_op+0xd3e/0x7ce4 kernel/bpf/verifier.c:15711 do_check kernel/bpf/verifier.c:18849 [inline] do_check_common+0x85ce/0xe516 kernel/bpf/verifier.c:21844 page last free pid 3829 tgid 3829 stack trace: __reset_page_owner+0x8c/0x400 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0x618/0x11d2 mm/page_alloc.c:2657 __free_pages+0x13a/0x1ba mm/page_alloc.c:4838 free_pages.part.0+0x268/0x4c6 mm/page_alloc.c:4851 free_pages+0xe/0x18 mm/page_alloc.c:4848 kasan_depopulate_vmalloc_pte+0x4a/0x70 mm/kasan/shadow.c:408 apply_to_pte_range mm/memory.c:2831 [inline] apply_to_pmd_range mm/memory.c:2875 [inline] apply_to_pud_range mm/memory.c:2911 [inline] apply_to_p4d_range mm/memory.c:2947 [inline] __apply_to_page_range+0x6a4/0x1230 mm/memory.c:2981 apply_to_existing_page_range+0x34/0x46 mm/memory.c:3014 kasan_release_vmalloc+0xc0/0xc6 mm/kasan/shadow.c:529 kasan_release_vmalloc_node mm/vmalloc.c:2196 [inline] purge_vmap_node+0x21c/0x9d8 mm/vmalloc.c:2213 process_one_work+0x968/0x1f38 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x5be/0xdc6 kernel/workqueue.c:3391 kthread+0x28c/0x3a4 kernel/kthread.c:389 ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:327 Memory state around the buggy address: ff60000030599780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ff60000030599800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ff60000030599880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ff60000030599900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ff60000030599980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================