================================================================== BUG: KASAN: slab-out-of-bounds in walk_stackframe+0x11c/0x260 arch/riscv/kernel/stacktrace.c:57 Read of size 8 at addr ffffaf800ed07ba0 by task syz-executor.1/2045 CPU: 0 PID: 2045 Comm: syz-executor.1 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 [] stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122 [] save_stack+0x112/0x16c mm/page_owner.c:121 [] __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 Allocated by task 1102416563: (stack is not available) Last potentially related work creation: ------------[ cut here ]------------ slab index 1189544 out of bounds (321) for stack id 845226a8 WARNING: CPU: 0 PID: 2045 at lib/stackdepot.c:304 stack_depot_fetch lib/stackdepot.c:304 [inline] WARNING: CPU: 0 PID: 2045 at lib/stackdepot.c:304 stack_depot_print+0x66/0x70 lib/stackdepot.c:276 Modules linked in: CPU: 0 PID: 2045 Comm: syz-executor.1 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 : ffffaf800ed07a60 gp : ffffffff85863ac0 tp : ffffaf800de60000 t0 : ffffffff86bcb657 t1 : fffff5ef0b53910c t2 : 0000000000000000 s0 : ffffaf800ed07a70 s1 : ffffaf807aa73800 a0 : 000000000000003c a1 : 00000000000f0000 a2 : 0000000000000505 a3 : ffffffff8012252a a4 : 531bb20589a1d800 a5 : 531bb20589a1d800 a6 : 0000000000f00000 a7 : ffffaf805a9c8863 s2 : ffffaf800ed07ba0 s3 : ffffaf8007201dc0 s4 : ffffaf800ed07800 s5 : ffffaf800ed07c00 s6 : 0000000000003fff s7 : ffffaf800ed07b40 s8 : ffffaf805a9de970 s9 : ffffffffffffc000 s10: ffffaf800ed07c20 s11: 0000000000000008 t3 : fffffffff3f3f300 t4 : fffff5ef0b53910c t5 : fffff5ef0b53910d t6 : ffffaf800ed07558 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 [] stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122 [] save_stack+0x112/0x16c mm/page_owner.c:121 [] __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 irq event stamp: 119501 hardirqs last enabled at (119500): [] rmqueue_pcplist mm/page_alloc.c:3671 [inline] hardirqs last enabled at (119500): [] rmqueue mm/page_alloc.c:3698 [inline] hardirqs last enabled at (119500): [] get_page_from_freelist+0xfc8/0x12d8 mm/page_alloc.c:4162 hardirqs last disabled at (119501): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (119501): [] _raw_spin_lock_irqsave+0x60/0x62 kernel/locking/spinlock.c:162 softirqs last enabled at (119444): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (119444): [] __do_softirq+0x618/0x8fc kernel/softirq.c:587 softirqs last disabled at (119451): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (119451): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (119451): [] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:637 ---[ end trace 0000000000000000 ]--- Second to last potentially related work creation: ------------[ cut here ]------------ slab index 2097151 out of bounds (321) for stack id ffffffff WARNING: CPU: 0 PID: 2045 at lib/stackdepot.c:304 stack_depot_fetch lib/stackdepot.c:304 [inline] WARNING: CPU: 0 PID: 2045 at lib/stackdepot.c:304 stack_depot_print+0x66/0x70 lib/stackdepot.c:276 Modules linked in: CPU: 0 PID: 2045 Comm: syz-executor.1 Tainted: G W 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 : ffffaf800ed07a60 gp : ffffffff85863ac0 tp : ffffaf800de60000 t0 : ffffffff86bcb657 t1 : fffff5ef0b53910c t2 : 0000000000000000 s0 : ffffaf800ed07a70 s1 : ffffaf807aa73800 a0 : 000000000000003c a1 : 00000000000f0000 a2 : 0000000000000505 a3 : ffffffff8012252a a4 : 531bb20589a1d800 a5 : 531bb20589a1d800 a6 : 0000000000f00000 a7 : ffffaf805a9c8863 s2 : ffffaf800ed07ba0 s3 : ffffaf8007201dc0 s4 : ffffaf800ed07800 s5 : ffffaf800ed07c00 s6 : 0000000000003fff s7 : ffffaf800ed07b40 s8 : ffffaf805a9de970 s9 : ffffffffffffc000 s10: ffffaf800ed07c20 s11: 0000000000000008 t3 : fffffffff3f3f300 t4 : fffff5ef0b53910c t5 : fffff5ef0b53910d t6 : ffffaf800ed07558 status: 0000000000000100 badaddr: 0000000000000000 cause: 0000000000000003 [] describe_object_stacks mm/kasan/report.c:221 [inline] [] describe_object mm/kasan/report.c:231 [inline] [] print_address_description.constprop.0+0x2ae/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 [] stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122 [] save_stack+0x112/0x16c mm/page_owner.c:121 [] __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 irq event stamp: 119501 hardirqs last enabled at (119500): [] rmqueue_pcplist mm/page_alloc.c:3671 [inline] hardirqs last enabled at (119500): [] rmqueue mm/page_alloc.c:3698 [inline] hardirqs last enabled at (119500): [] get_page_from_freelist+0xfc8/0x12d8 mm/page_alloc.c:4162 hardirqs last disabled at (119501): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (119501): [] _raw_spin_lock_irqsave+0x60/0x62 kernel/locking/spinlock.c:162 softirqs last enabled at (119444): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (119444): [] __do_softirq+0x618/0x8fc kernel/softirq.c:587 softirqs last disabled at (119451): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (119451): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (119451): [] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:637 ---[ end trace 0000000000000000 ]--- The buggy address belongs to the object at ffffaf800ed07800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 928 bytes inside of 1024-byte region [ffffaf800ed07800, ffffaf800ed07c00) The buggy address belongs to the page: page:ffffaf807aa73800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8ef00 head:ffffaf807aa73800 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x8800010200(slab|head|section=17|node=0|zone=0) raw: 0000008800010200 0000000000000000 0000000000000001 ffffaf8007201dc0 raw: 0000000000000000 0000000000100010 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 13, ts 716887637800, free_ts 665220338700 __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 net/ipv4/tcp.c:1592 [inline] sk_defer_free_flush include/net/tcp.h:1378 [inline] tcp_recvmsg+0x1f2/0x414 net/ipv4/tcp.c:2566 inet_recvmsg+0x10a/0x4ba net/ipv4/af_inet.c:850 sock_recvmsg_nosec net/socket.c:948 [inline] sock_recvmsg net/socket.c:966 [inline] sock_recvmsg net/socket.c:962 [inline] sock_read_iter+0x26c/0x2ba net/socket.c:1039 call_read_iter include/linux/fs.h:2068 [inline] new_sync_read+0x3ae/0x3d8 fs/read_write.c:400 vfs_read+0x2ce/0x324 fs/read_write.c:481 ksys_read+0x1c4/0x224 fs/read_write.c:619 __do_sys_read fs/read_write.c:629 [inline] sys_read+0x28/0x36 fs/read_write.c:627 ret_from_syscall+0x0/0x2 Memory state around the buggy address: ffffaf800ed07a80: fc fc fc fc 00 00 00 00 00 00 00 00 fc fc fc fc ffffaf800ed07b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffffaf800ed07b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffffaf800ed07c00: f1 f1 f1 f1 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 ffffaf800ed07c80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 ==================================================================