================================================================== BUG: KASAN: slab-out-of-bounds in riscv_intc_irq+0x24/0xc8 drivers/irqchip/irq-riscv-intc.c:24 Read of size 8 at addr ffffaf800ee1ff90 by task syz-executor.1/2060 CPU: 0 PID: 2060 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 [] riscv_intc_irq+0x24/0xc8 drivers/irqchip/irq-riscv-intc.c:24 [] generic_handle_arch_irq+0x36/0x54 kernel/irq/handle.c:238 [] ret_from_exception+0x0/0x10 [] check_preemption_disabled+0x3a/0x192 lib/smp_processor_id.c:16 Allocated by task 16777215: (stack is not available) Freed by task 2072: 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] kfree+0xe0/0x3e4 mm/slub.c:4562 tomoyo_realpath_from_path+0x158/0x3f4 security/tomoyo/realpath.c:291 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x1fc/0x3a8 security/tomoyo/file.c:822 tomoyo_inode_getattr+0x1e/0x28 security/tomoyo/tomoyo.c:122 security_inode_getattr+0x82/0xc6 security/security.c:1326 vfs_getattr fs/stat.c:157 [inline] vfs_fstat+0x54/0xc8 fs/stat.c:182 __do_sys_newfstat+0x96/0x106 fs/stat.c:422 sys_newfstat+0x22/0x2e fs/stat.c:419 ret_from_syscall+0x0/0x2 Last potentially related work creation: ------------[ cut here ]------------ slab index 1506808 out of bounds (294) for stack id 8456fdf8 WARNING: CPU: 0 PID: 2060 at lib/stackdepot.c:304 stack_depot_fetch lib/stackdepot.c:304 [inline] WARNING: CPU: 0 PID: 2060 at lib/stackdepot.c:304 stack_depot_print+0x66/0x70 lib/stackdepot.c:276 Modules linked in: CPU: 0 PID: 2060 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 : ffffaf800ee1fd60 gp : ffffffff85863ac0 tp : ffffaf800e6d9840 t0 : ffffffff86bcb657 t1 : fffff5ef0b53910c t2 : 0000000000000000 s0 : ffffaf800ee1fd70 s1 : ffffaf807aa786c0 a0 : 000000000000003c a1 : 00000000000f0000 a2 : 0000000000010506 a3 : ffffffff8012252a a4 : 93721f8c2c1ff900 a5 : 93721f8c2c1ff900 a6 : 0000000000f00000 a7 : ffffaf805a9c8863 s2 : ffffaf800ee1ff90 s3 : ffffaf8007202140 s4 : ffffaf800ee1e000 s5 : ffffaf800ee1f000 s6 : 0000000000003fff s7 : 8000000000000009 s8 : ffffffff85889780 s9 : 1ffff5f001dc400c s10: ffffffff84b73e00 s11: ffffffff80256d34 t3 : fffffffff3f3f300 t4 : fffff5ef0b53910c t5 : fffff5ef0b53910d t6 : ffffaf800ee1f858 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 [] riscv_intc_irq+0x24/0xc8 drivers/irqchip/irq-riscv-intc.c:24 [] generic_handle_arch_irq+0x36/0x54 kernel/irq/handle.c:238 [] ret_from_exception+0x0/0x10 [] check_preemption_disabled+0x3a/0x192 lib/smp_processor_id.c:16 irq event stamp: 52003 hardirqs last enabled at (52002): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (52002): [] _raw_spin_unlock_irqrestore+0x68/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (52003): [] __trace_hardirqs_off+0x18/0x20 arch/riscv/kernel/trace_irq.c:25 softirqs last enabled at (51826): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (51826): [] __do_softirq+0x618/0x8fc kernel/softirq.c:587 softirqs last disabled at (51831): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (51831): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (51831): [] __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 (294) for stack id ffffffff WARNING: CPU: 0 PID: 2060 at lib/stackdepot.c:304 stack_depot_fetch lib/stackdepot.c:304 [inline] WARNING: CPU: 0 PID: 2060 at lib/stackdepot.c:304 stack_depot_print+0x66/0x70 lib/stackdepot.c:276 Modules linked in: CPU: 0 PID: 2060 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 : ffffaf800ee1fd60 gp : ffffffff85863ac0 tp : ffffaf800e6d9840 t0 : ffffffff86bcb657 t1 : fffff5ef0b53910c t2 : 0000000000000000 s0 : ffffaf800ee1fd70 s1 : ffffaf807aa786c0 a0 : 000000000000003c a1 : 00000000000f0000 a2 : 0000000000010506 a3 : ffffffff8012252a a4 : 93721f8c2c1ff900 a5 : 93721f8c2c1ff900 a6 : 0000000000f00000 a7 : ffffaf805a9c8863 s2 : ffffaf800ee1ff90 s3 : ffffaf8007202140 s4 : ffffaf800ee1e000 s5 : ffffaf800ee1f000 s6 : 0000000000003fff s7 : 8000000000000009 s8 : ffffffff85889780 s9 : 1ffff5f001dc400c s10: ffffffff84b73e00 s11: ffffffff80256d34 t3 : fffffffff3f3f300 t4 : fffff5ef0b53910c t5 : fffff5ef0b53910d t6 : ffffaf800ee1f858 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 [] riscv_intc_irq+0x24/0xc8 drivers/irqchip/irq-riscv-intc.c:24 [] generic_handle_arch_irq+0x36/0x54 kernel/irq/handle.c:238 [] ret_from_exception+0x0/0x10 [] check_preemption_disabled+0x3a/0x192 lib/smp_processor_id.c:16 irq event stamp: 52003 hardirqs last enabled at (52002): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (52002): [] _raw_spin_unlock_irqrestore+0x68/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (52003): [] __trace_hardirqs_off+0x18/0x20 arch/riscv/kernel/trace_irq.c:25 softirqs last enabled at (51826): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (51826): [] __do_softirq+0x618/0x8fc kernel/softirq.c:587 softirqs last disabled at (51831): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (51831): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (51831): [] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:637 ---[ end trace 0000000000000000 ]--- The buggy address belongs to the object at ffffaf800ee1e000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3984 bytes to the right of 4096-byte region [ffffaf800ee1e000, ffffaf800ee1f000) The buggy address belongs to the page: page:ffffaf807aa786c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8f018 head:ffffaf807aa786c0 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x8800010200(slab|head|section=17|node=0|zone=0) raw: 0000008800010200 0000000000000000 0000000000000122 ffffaf8007202140 raw: 0000000000000000 0000000000040004 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2072, ts 694582396800, free_ts 563883942900 __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+0x25a/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] slab_alloc mm/slub.c:3238 [inline] __kmalloc+0x268/0x318 mm/slub.c:4420 kmalloc include/linux/slab.h:586 [inline] tomoyo_realpath_from_path+0x9c/0x3f4 security/tomoyo/realpath.c:254 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x282/0x348 security/tomoyo/file.c:771 tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline] tomoyo_file_open+0x78/0x7c security/tomoyo/tomoyo.c:306 security_file_open+0x44/0x9a security/security.c:1627 do_dentry_open+0x1c6/0x7d4 fs/open.c:811 vfs_open+0x52/0x5e fs/open.c:959 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 net/core/skbuff.c:756 [inline] kfree_skb_reason net/core/skbuff.c:776 [inline] kfree_skb_reason+0x11a/0x40a net/core/skbuff.c:770 kfree_skb include/linux/skbuff.h:1114 [inline] kfree_skb_list net/core/skbuff.c:785 [inline] skb_release_data+0x33a/0x3c4 net/core/skbuff.c:675 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 Memory state around the buggy address: ffffaf800ee1fe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffaf800ee1ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffaf800ee1ff80: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ^ ffffaf800ee20000: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 ffffaf800ee20080: f1 f1 04 f2 04 f3 f3 f3 00 00 00 00 00 00 00 00 ==================================================================