================================================================== BUG: KASAN: slab-out-of-bounds in walk_stackframe+0x11c/0x260 arch/riscv/kernel/stacktrace.c:57 Read of size 8 at addr ffffaf8008197fe0 by task syz-executor.0/2040 CPU: 0 PID: 2040 Comm: syz-executor.0 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:113 [] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:119 [] __dump_stack lib/dump_stack.c:88 [inline] [] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:106 [] print_address_description.constprop.0+0x2a/0x330 mm/kasan/report.c:255 [] __kasan_report mm/kasan/report.c:442 [inline] [] kasan_report+0x184/0x1e0 mm/kasan/report.c:459 [] check_region_inline mm/kasan/generic.c:183 [inline] [] __asan_load8+0x6e/0x96 mm/kasan/generic.c:256 [] walk_stackframe+0x11c/0x260 arch/riscv/kernel/stacktrace.c:57 [] arch_stack_walk+0x2c/0x3c arch/riscv/kernel/stacktrace.c:146 Allocated by task 721: (stack is not available) Last potentially related work creation: ------------[ cut here ]------------ slab index 473900 out of bounds (290) for stack id 20473b2c WARNING: CPU: 0 PID: 2040 at lib/stackdepot.c:304 stack_depot_fetch lib/stackdepot.c:304 [inline] WARNING: CPU: 0 PID: 2040 at lib/stackdepot.c:304 stack_depot_print+0x66/0x70 lib/stackdepot.c:276 Modules linked in: CPU: 0 PID: 2040 Comm: syz-executor.0 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0 Hardware name: riscv-virtio,qemu (DT) epc : stack_depot_fetch lib/stackdepot.c:304 [inline] epc : stack_depot_print+0x66/0x70 lib/stackdepot.c:276 ra : stack_depot_fetch lib/stackdepot.c:304 [inline] ra : stack_depot_print+0x66/0x70 lib/stackdepot.c:276 epc : ffffffff80c00b8a ra : ffffffff80c00b8a sp : ffffaf8008197ea0 gp : ffffffff85863ac0 tp : ffffaf800b6be100 t0 : ffffffff86bcb657 t1 : fffff5ef0b53910c t2 : 0000000000000000 s0 : ffffaf8008197eb0 s1 : ffffaf807a890080 a0 : 000000000000003b a1 : 00000000000f0000 a2 : 0000000000000504 a3 : ffffffff8012252a a4 : f3d788cf64c7cb00 a5 : f3d788cf64c7cb00 a6 : 0000000000f00000 a7 : ffffaf805a9c8863 s2 : ffffaf8008197fe0 s3 : ffffaf8007201dc0 s4 : ffffaf8008197800 s5 : ffffaf8008197c00 s6 : 0000000000003fff s7 : ffffaf8008197f80 s8 : 0000000000400000 s9 : ffffffffffffc000 s10: ffffaf8008198060 s11: 0000000000000008 t3 : fffffffff3f3f300 t4 : fffff5ef0b53910c t5 : fffff5ef0b53910d t6 : ffffaf8008197998 status: 0000000000000100 badaddr: 0000000000000000 cause: 0000000000000003 [] describe_object_stacks mm/kasan/report.c:216 [inline] [] describe_object mm/kasan/report.c:231 [inline] [] print_address_description.constprop.0+0x2fc/0x330 mm/kasan/report.c:263 [] __kasan_report mm/kasan/report.c:442 [inline] [] kasan_report+0x184/0x1e0 mm/kasan/report.c:459 [] check_region_inline mm/kasan/generic.c:183 [inline] [] __asan_load8+0x6e/0x96 mm/kasan/generic.c:256 [] walk_stackframe+0x11c/0x260 arch/riscv/kernel/stacktrace.c:57 [] arch_stack_walk+0x2c/0x3c arch/riscv/kernel/stacktrace.c:146 irq event stamp: 41095 hardirqs last enabled at (41094): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (41094): [] _raw_spin_unlock_irqrestore+0x68/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (41095): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (41095): [] _raw_spin_lock_irqsave+0x60/0x62 kernel/locking/spinlock.c:162 softirqs last enabled at (41014): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (41014): [] __do_softirq+0x618/0x8fc kernel/softirq.c:587 softirqs last disabled at (41021): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (41021): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (41021): [] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:637 ---[ end trace 0000000000000000 ]--- Second to last potentially related work creation: stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122 kasan_save_stack+0x2c/0x58 mm/kasan/common.c:38 kasan_set_track+0x1a/0x26 mm/kasan/common.c:45 kasan_set_free_info+0x1e/0x3a mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x15e/0x180 mm/kasan/common.c:328 __kasan_slab_free+0x10/0x18 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:236 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x8e/0x1cc mm/slub.c:1754 slab_free mm/slub.c:3509 [inline] kmem_cache_free+0xca/0x482 mm/slub.c:3526 jbd2_free_handle include/linux/jbd2.h:1608 [inline] jbd2_journal_stop+0x47e/0x99c fs/jbd2/transaction.c:1937 __ext4_journal_stop+0x90/0x154 fs/ext4/ext4_jbd2.c:127 ext4_mkdir+0x618/0x6fa fs/ext4/namei.c:2970 vfs_mkdir+0x110/0x202 fs/namei.c:3933 do_mkdirat+0x22e/0x262 fs/namei.c:3959 __do_sys_mkdirat fs/namei.c:3974 [inline] sys_mkdirat+0x88/0xb2 fs/namei.c:3972 ret_from_syscall+0x0/0x2 The buggy address belongs to the object at ffffaf8008197800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 992 bytes to the right of 1024-byte region [ffffaf8008197800, ffffaf8008197c00) The buggy address belongs to the page: page:ffffaf807a890080 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffffaf8008190800 pfn:0x88390 head:ffffaf807a890080 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x8800010200(slab|head|section=17|node=0|zone=0) raw: 0000008800010200 ffffaf807a9b6148 ffffaf807aa6c308 ffffaf8007201dc0 raw: ffffaf8008190800 000000000010000a 00000001ffffffff 0000000000000000 raw: 00000000000007ff page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1995, ts 508327549800, free_ts 508219580500 __set_page_owner+0x48/0x136 mm/page_owner.c:183 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0xd0/0x10a mm/page_alloc.c:2427 prep_new_page mm/page_alloc.c:2434 [inline] get_page_from_freelist+0x8da/0x12d8 mm/page_alloc.c:4165 __alloc_pages+0x150/0x3b6 mm/page_alloc.c:5389 alloc_pages+0x132/0x2a6 mm/mempolicy.c:2271 alloc_slab_page.constprop.0+0xc2/0xfa mm/slub.c:1799 allocate_slab mm/slub.c:1944 [inline] new_slab+0x76/0x2cc mm/slub.c:2004 ___slab_alloc+0x56e/0x918 mm/slub.c:3018 __slab_alloc.constprop.0+0x50/0x8c mm/slub.c:3105 slab_alloc_node mm/slub.c:3196 [inline] __kmalloc_node_track_caller+0x26c/0x362 mm/slub.c:4957 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0xee/0x2e4 net/core/skbuff.c:426 __napi_alloc_skb+0x72/0x214 net/core/skbuff.c:568 napi_alloc_skb include/linux/skbuff.h:3005 [inline] page_to_skb+0x16e/0x70e drivers/net/virtio_net.c:437 receive_mergeable drivers/net/virtio_net.c:1039 [inline] receive_buf+0xa20/0x3e50 drivers/net/virtio_net.c:1149 virtnet_receive drivers/net/virtio_net.c:1441 [inline] virtnet_poll+0x39c/0x986 drivers/net/virtio_net.c:1550 __napi_poll+0x7c/0x358 net/core/dev.c:6365 page last free stack trace: __reset_page_owner+0x4a/0xea mm/page_owner.c:142 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1352 [inline] free_pcp_prepare+0x29c/0x45e mm/page_alloc.c:1404 free_unref_page_prepare mm/page_alloc.c:3325 [inline] free_unref_page+0x6a/0x31e mm/page_alloc.c:3404 free_the_page mm/page_alloc.c:706 [inline] free_compound_page+0x70/0x8a mm/page_alloc.c:729 destroy_compound_page include/linux/mm.h:889 [inline] __put_compound_page+0x7c/0xb0 mm/swap.c:112 __put_page+0x48/0x100 mm/swap.c:128 folio_put include/linux/mm.h:1199 [inline] put_page include/linux/mm.h:1237 [inline] __skb_frag_unref include/linux/skbuff.h:3178 [inline] skb_release_data+0x2f8/0x3c4 net/core/skbuff.c:672 skb_release_all net/core/skbuff.c:742 [inline] __kfree_skb+0x38/0x50 net/core/skbuff.c:756 __sk_defer_free_flush+0x52/0x68 net/ipv4/tcp.c:1592 sk_defer_free_flush include/net/tcp.h:1378 [inline] tcp_v4_rcv+0x1bbc/0x1f46 net/ipv4/tcp_ipv4.c:2114 ip_protocol_deliver_rcu+0x9c/0x8c0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x12c/0x278 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x160/0x464 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:461 [inline] ip_sublist_rcv_finish+0x64/0x1b2 net/ipv4/ip_input.c:551 ip_list_rcv_finish net/ipv4/ip_input.c:601 [inline] ip_sublist_rcv+0x420/0x738 net/ipv4/ip_input.c:609 ip_list_rcv+0x268/0x2c0 net/ipv4/ip_input.c:644 Memory state around the buggy address: ffffaf8008197e80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffffaf8008197f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffaf8008197f80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ^ ffffaf8008198000: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 f3 ffffaf8008198080: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================