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| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| upstream | KASAN: slab-out-of-bounds Read in mcp2221_raw_event input usb | 19 | C | 1144 | 57d | 363d | 29/29 | fixed on 2025/10/09 01:15 | ||
| upstream | KASAN: slab-out-of-bounds Read in mcp2221_raw_event (2) input usb | 19 | C | error | 209 | 4h49m | 53d | 0/29 | upstream: reported C repro on 2025/10/13 04:00 |
================================================================== BUG: KASAN: use-after-free in mcp2221_raw_event+0x1062/0x1240 drivers/hid/hid-mcp2221.c:856 Read of size 1 at addr ffff888079633fff by task syz.1.335/6748 CPU: 0 PID: 6748 Comm: syz.1.335 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: <IRQ> dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 mcp2221_raw_event+0x1062/0x1240 drivers/hid/hid-mcp2221.c:856 hid_input_report+0x400/0x520 drivers/hid/hid-core.c:2095 hid_irq_in+0x479/0x6d0 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x35f/0x520 drivers/usb/core/hcd.c:1650 dummy_timer+0x88a/0x3140 drivers/usb/gadget/udc/dummy_hcd.c:1993 __run_hrtimer kernel/time/hrtimer.c:1750 [inline] __hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1814 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1831 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa9/0x110 kernel/locking/spinlock.c:194 Code: 74 05 e8 aa 1b 13 f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> c2 96 e2 f6 65 8b 05 b3 cd 8a 75 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc900033d7ca0 EFLAGS: 00000206 RAX: bef691a8bfc5d300 RBX: 0000000000000a06 RCX: bef691a8bfc5d300 RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: 0000000000000001 RBP: ffffc900033d7d30 R08: ffffffff8e4a8e2f R09: 1ffffffff1c951c5 R10: dffffc0000000000 R11: fffffbfff1c951c6 R12: dffffc0000000000 R13: ffffc900033d7d80 R14: ffffffff971716b8 R15: 1ffff9200067af94 hrtimer_init_sleeper_on_stack kernel/time/hrtimer.c:475 [inline] hrtimer_nanosleep+0xac/0x350 kernel/time/hrtimer.c:2137 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1397 [inline] __se_sys_clock_nanosleep+0x2ea/0x370 kernel/time/posix-timers.c:1374 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8f987c2005 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8 RSP: 002b:00007f8f996fff60 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f8f987c2005 RDX: 00007f8f996fffa0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00002000000001c0 R13: 0000000000000000 R14: 00007f8f989e5fa0 R15: 00007fff22f54b88 </TASK> The buggy address belongs to the physical page: page:ffffea0001e58cc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x79633 memcg:ffff88802f242402 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfffffdff(table) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 ffff88802e35cd20 00000001fffffdff ffff88802f242402 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x540dc0(GFP_USER|__GFP_COMP|__GFP_ZERO|__GFP_ACCOUNT), pid 5788, tgid 5788 (syz-executor), ts 154101668677, free_ts 153962044827 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 pagetable_alloc include/linux/mm.h:2900 [inline] __pte_alloc_one include/asm-generic/pgalloc.h:68 [inline] pte_alloc_one+0x89/0x540 arch/x86/mm/pgtable.c:33 __pte_alloc+0x22/0x2a0 mm/memory.c:438 copy_pte_range mm/memory.c:1029 [inline] copy_pmd_range mm/memory.c:1168 [inline] copy_pud_range mm/memory.c:1205 [inline] copy_p4d_range mm/memory.c:1229 [inline] copy_page_range+0x2d72/0x3600 mm/memory.c:1323 dup_mmap kernel/fork.c:764 [inline] dup_mm kernel/fork.c:1692 [inline] copy_mm+0x11a8/0x1ca0 kernel/fork.c:1741 copy_process+0x16d3/0x3d70 kernel/fork.c:2506 kernel_clone+0x21b/0x840 kernel/fork.c:2914 __do_sys_clone kernel/fork.c:3057 [inline] __se_sys_clone kernel/fork.c:3041 [inline] __x64_sys_clone+0x18c/0x1e0 kernel/fork.c:3041 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336 free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2475 release_pages+0x1fa0/0x2220 mm/swap.c:1022 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline] tlb_flush_mmu_free mm/mmu_gather.c:293 [inline] tlb_flush_mmu+0x368/0x4f0 mm/mmu_gather.c:300 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:392 exit_mmap+0x3f0/0xb50 mm/mmap.c:3315 __mmput+0x118/0x3c0 kernel/fork.c:1355 exit_mm+0x1da/0x2c0 kernel/exit.c:569 do_exit+0x88e/0x23c0 kernel/exit.c:870 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024 __do_sys_exit_group kernel/exit.c:1035 [inline] __se_sys_exit_group kernel/exit.c:1033 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff888079633e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888079633f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888079633f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888079634000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888079634080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: 74 05 je 0x7 2: e8 aa 1b 13 f7 call 0xf7131bb1 7: 48 c7 44 24 20 00 00 movq $0x0,0x20(%rsp) e: 00 00 10: 9c pushf 11: 8f 44 24 20 pop 0x20(%rsp) 15: f6 44 24 21 02 testb $0x2,0x21(%rsp) 1a: 75 4b jne 0x67 1c: f7 c3 00 02 00 00 test $0x200,%ebx 22: 74 01 je 0x25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 c2 96 e2 f6 call 0xf6e296f1 <-- trapping instruction 2f: 65 8b 05 b3 cd 8a 75 mov %gs:0x758acdb3(%rip),%eax # 0x758acde9 36: 85 c0 test %eax,%eax 38: 74 3c je 0x76 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: 04 24 add $0x24,%al 3e: 0e (bad) 3f: 36 ss
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/11/24 14:45 | linux-6.6.y | 1e89a1be4fe9 | bf6fe8fe | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: use-after-free Read in mcp2221_raw_event | ||
| 2025/11/20 12:21 | linux-6.6.y | 0a805b6ea8cd | 2cc4c24a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: use-after-free Read in mcp2221_raw_event | ||
| 2025/11/17 01:05 | linux-6.6.y | 0a805b6ea8cd | f7988ea4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: use-after-free Read in mcp2221_raw_event | ||
| 2025/07/16 11:31 | linux-6.6.y | 9247f4e6573a | 124ec9cc | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: use-after-free Read in mcp2221_raw_event | ||
| 2025/06/21 10:54 | linux-6.6.y | 6282921b6825 | d6cdfb8a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: use-after-free Read in mcp2221_raw_event | ||
| 2025/11/24 14:44 | linux-6.6.y | 1e89a1be4fe9 | bf6fe8fe | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-out-of-bounds Read in mcp2221_raw_event | ||
| 2025/11/19 08:19 | linux-6.6.y | 0a805b6ea8cd | ef766cd7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-out-of-bounds Read in mcp2221_raw_event | ||
| 2025/11/17 01:05 | linux-6.6.y | 0a805b6ea8cd | f7988ea4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-out-of-bounds Read in mcp2221_raw_event | ||
| 2025/11/12 03:11 | linux-6.6.y | 0a805b6ea8cd | 4e1406b4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-out-of-bounds Read in mcp2221_raw_event | ||
| 2025/10/27 07:33 | linux-6.6.y | 4a243110dc88 | c0460fcd | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-out-of-bounds Read in mcp2221_raw_event | ||
| 2025/10/13 21:53 | linux-6.6.y | 655054d2c3c1 | b6605ba8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-out-of-bounds Read in mcp2221_raw_event | ||
| 2025/07/15 00:55 | linux-6.6.y | 9247f4e6573a | d8fc7335 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-out-of-bounds Read in mcp2221_raw_event | ||
| 2025/07/10 06:21 | linux-6.6.y | a5df3a702b2c | 956bd956 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-out-of-bounds Read in mcp2221_raw_event | ||
| 2025/07/02 07:14 | linux-6.6.y | 3f5b4c104b7d | bc80e4f0 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-out-of-bounds Read in mcp2221_raw_event | ||
| 2025/06/27 05:42 | linux-6.6.y | 6282921b6825 | 803ce19b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-out-of-bounds Read in mcp2221_raw_event |