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 ff600000373598e0 by task syz.1.6374/23270 CPU: 1 UID: 0 PID: 23270 Comm: syz.1.6374 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 23031: 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] __kmalloc_cache_noprof+0x15e/0x3f4 mm/slub.c:4329 kmalloc_noprof include/linux/slab.h:901 [inline] audit_log_d_path+0xca/0x196 kernel/audit.c:2149 audit_log_d_path_exe+0x3e/0x7a kernel/audit.c:2220 audit_log_task+0x24a/0x2ec kernel/auditsc.c:2962 audit_seccomp+0x5c/0x12c kernel/auditsc.c:3009 seccomp_log kernel/seccomp.c:1016 [inline] __seccomp_filter+0x696/0xc1a kernel/seccomp.c:1305 __secure_computing+0x1bc/0x2c2 kernel/seccomp.c:1367 syscall_trace_enter+0x82/0x20c kernel/entry/common.c:52 syscall_enter_from_user_mode_work include/linux/entry-common.h:169 [inline] syscall_enter_from_user_mode include/linux/entry-common.h:199 [inline] do_trap_ecall_u+0x1be/0x216 arch/riscv/kernel/traps.c:326 handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197 Freed by task 23031: 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 audit_log_d_path+0x118/0x196 kernel/audit.c:2160 audit_log_d_path_exe+0x3e/0x7a kernel/audit.c:2220 audit_log_task+0x24a/0x2ec kernel/auditsc.c:2962 audit_seccomp+0x5c/0x12c kernel/auditsc.c:3009 seccomp_log kernel/seccomp.c:1016 [inline] __seccomp_filter+0x696/0xc1a kernel/seccomp.c:1305 __secure_computing+0x1bc/0x2c2 kernel/seccomp.c:1367 syscall_trace_enter+0x82/0x20c kernel/entry/common.c:52 syscall_enter_from_user_mode_work include/linux/entry-common.h:169 [inline] syscall_enter_from_user_mode include/linux/entry-common.h:199 [inline] do_trap_ecall_u+0x1be/0x216 arch/riscv/kernel/traps.c:326 handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197 The buggy address belongs to the object at ff60000037358000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 6368 bytes inside of freed 8192-byte region [ff60000037358000, ff6000003735a000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xff60000037358000 pfn:0xb7358 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xffe000000000240(workingset|head|node=0|zone=0|lastcpupid=0x7ff) page_type: f5(slab) raw: 0ffe000000000240 ff60000011402280 ff1c000000c1d210 ff1c0000006b2010 raw: ff60000037358000 0000000000020001 00000001f5000000 0000000000000000 head: 0ffe000000000240 ff60000011402280 ff1c000000c1d210 ff1c0000006b2010 head: ff60000037358000 0000000000020001 00000001f5000000 0000000000000000 head: 0ffe000000000003 ff1c000000dcd601 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 17187, tgid 17186 (syz.1.3910), ts 6931824667900, free_ts 6687812578800 __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] __kmalloc_cache_noprof+0xd4/0x3f4 mm/slub.c:4324 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] cryptomgr_schedule_probe crypto/algboss.c:87 [inline] cryptomgr_notify+0xc8/0x9a4 crypto/algboss.c:225 notifier_call_chain+0xa8/0x5f2 kernel/notifier.c:85 blocking_notifier_call_chain kernel/notifier.c:380 [inline] blocking_notifier_call_chain+0x5e/0x8e kernel/notifier.c:368 crypto_probing_notify crypto/api.c:325 [inline] crypto_probing_notify crypto/api.c:318 [inline] crypto_alg_mod_lookup+0x3ac/0x4d2 crypto/api.c:352 crypto_has_alg+0x26/0x66 crypto/api.c:690 crypto_has_comp include/linux/crypto.h:527 [inline] xfrm_probe_algs net/xfrm/xfrm_algo.c:831 [inline] xfrm_probe_algs+0x23c/0x3e8 net/xfrm/xfrm_algo.c:812 page last free pid 16747 tgid 16746 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_pages_ok+0xa44/0xffc mm/page_alloc.c:1269 free_unref_page+0x106/0x11d2 mm/page_alloc.c:2653 __folio_put+0x1bc/0x27e mm/swap.c:112 folio_put include/linux/mm.h:1488 [inline] free_large_kmalloc+0xe0/0x138 mm/slub.c:4732 kfree+0x34c/0x508 mm/slub.c:4755 kvfree+0x62/0x76 mm/util.c:693 map_update_elem+0x55a/0x742 kernel/bpf/syscall.c:1731 __sys_bpf+0x4aa/0x363c kernel/bpf/syscall.c:5778 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline] __se_sys_bpf kernel/bpf/syscall.c:5895 [inline] __riscv_sys_bpf+0x6c/0x9e kernel/bpf/syscall.c:5895 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 Memory state around the buggy address: ff60000037359780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ff60000037359800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ff60000037359880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ff60000037359900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ff60000037359980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================