Hello, syzbot found the following issue on: HEAD commit: d8d936c51388 usb: storage: add a macro for the upper limit.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=138e1de8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9666422a569a9b7d dashboard link: https://syzkaller.appspot.com/bug?extid=52c1a7d3e5b361ccd346 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b5f0fe63d6bf/disk-d8d936c5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/16c74d2e64c7/vmlinux-d8d936c5.xz kernel image: https://storage.googleapis.com/syzbot-assets/00ab13339c70/bzImage-d8d936c5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+52c1a7d3e5b361ccd346@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0xf98/0x1030 drivers/hid/hid-mcp2221.c:852 Read of size 1 at addr ffff888125653fff by task kworker/1:3/5238 CPU: 1 UID: 0 PID: 5238 Comm: kworker/1:3 Not tainted 6.13.0-rc1-syzkaller-gd8d936c51388 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events legacy_dvb_usb_read_remote_control Call Trace: <IRQ> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xc3/0x620 mm/kasan/report.c:489 kasan_report+0xd9/0x110 mm/kasan/report.c:602 mcp2221_raw_event+0xf98/0x1030 drivers/hid/hid-mcp2221.c:852 __hid_input_report.constprop.0+0x312/0x440 drivers/hid/hid-core.c:2111 hid_irq_in+0x35e/0x870 drivers/hid/usbhid/hid-core.c:285 __usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734 dummy_timer+0x17f0/0x3930 drivers/usb/gadget/udc/dummy_hcd.c:1993 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1820 handle_softirqs+0x206/0x8d0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xfa/0x160 kernel/softirq.c:655 irq_exit_rcu+0x9/0x30 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1049 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:console_flush_all+0x9a4/0xc60 kernel/printk/printk.c:3211 Code: 00 e8 90 de 27 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 1e 39 20 00 48 85 db 0f 85 55 01 00 00 e8 a0 36 20 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 25 41 7a RSP: 0018:ffffc9000211f8b0 EFLAGS: 00000293 RAX: ffffffff893a7798 RBX: 0000000000000000 RCX: ffffffff813b1bb2 RDX: ffff88810dbe1d40 RSI: ffffffff813b1bc0 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000005 R12: ffffffff893a7798 R13: ffffffff893a7740 R14: ffffc9000211f940 R15: dffffc0000000000 __console_flush_and_unlock kernel/printk/printk.c:3269 [inline] console_unlock+0xd9/0x210 kernel/printk/printk.c:3309 vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2432 vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:86 _printk+0xc8/0x100 kernel/printk/printk.c:2457 legacy_dvb_usb_read_remote_control+0x40d/0x500 drivers/media/usb/dvb-usb/dvb-usb-remote.c:124 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 18002: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6e/0x70 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_noprof+0x154/0x3b0 mm/slub.c:4160 vma_lock_alloc kernel/fork.c:446 [inline] vm_area_dup+0x51/0x160 kernel/fork.c:499 dup_mmap kernel/fork.c:697 [inline] dup_mm kernel/fork.c:1695 [inline] copy_mm kernel/fork.c:1744 [inline] copy_process+0x76a1/0x8ba0 kernel/fork.c:2395 kernel_clone+0xfd/0x960 kernel/fork.c:2807 __do_sys_clone+0xba/0x100 kernel/fork.c:2950 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 20259: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x37/0x50 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2338 [inline] slab_free mm/slub.c:4598 [inline] kmem_cache_free+0x133/0x470 mm/slub.c:4700 vma_lock_free kernel/fork.c:458 [inline] __vm_area_free+0x38/0x50 kernel/fork.c:514 remove_vma+0x154/0x1b0 mm/vma.c:385 exit_mmap+0x4e2/0xb20 mm/mmap.c:1691 __mmput kernel/fork.c:1353 [inline] mmput+0xdb/0x430 kernel/fork.c:1375 exit_mm kernel/exit.c:570 [inline] do_exit+0x9bf/0x2ce0 kernel/exit.c:925 do_group_exit+0xd3/0x2a0 kernel/exit.c:1087 get_signal+0x24ed/0x26c0 kernel/signal.c:3017 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x147/0x260 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888125653e58 which belongs to the cache vma_lock of size 152 The buggy address is located 271 bytes to the right of allocated 152-byte region [ffff888125653e58, ffff888125653ef0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x125653 memcg:ffff888112012101 flags: 0x200000000000000(node=0|zone=2) page_type: f5(slab) raw: 0200000000000000 ffff888100ad6c80 ffffea000469ff40 dead000000000008 raw: 0000000000000000 0000000000120012 00000001f5000000 ffff888112012101 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 19443, tgid 19443 (modprobe), ts 1744528990053, free_ts 1582817727208 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0xe76/0x2b90 mm/page_alloc.c:3474 __alloc_pages_noprof+0x21c/0x22a0 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0xeb/0x400 mm/mempolicy.c:2265 alloc_slab_page mm/slub.c:2408 [inline] allocate_slab mm/slub.c:2574 [inline] new_slab+0x2c9/0x410 mm/slub.c:2627 ___slab_alloc+0xd45/0x1750 mm/slub.c:3815 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3905 __slab_alloc_node mm/slub.c:3980 [inline] slab_alloc_node mm/slub.c:4141 [inline] kmem_cache_alloc_noprof+0x1fd/0x3b0 mm/slub.c:4160 vma_lock_alloc kernel/fork.c:446 [inline] vm_area_alloc+0x107/0x1f0 kernel/fork.c:477 __mmap_new_vma mm/vma.c:2340 [inline] __mmap_region+0xf13/0x24f0 mm/vma.c:2456 mmap_region+0x127/0x320 mm/mmap.c:1347 do_mmap+0xc00/0xfc0 mm/mmap.c:496 vm_mmap_pgoff+0x1ba/0x350 mm/util.c:580 ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:542 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 page last free pid 2961 tgid 2961 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0x661/0xe40 mm/page_alloc.c:2657 vfree+0x17a/0x890 mm/vmalloc.c:3382 kcov_put kernel/kcov.c:439 [inline] kcov_put+0x2a/0x40 kernel/kcov.c:435 kcov_close+0xd/0x20 kernel/kcov.c:535 __fput+0x3f8/0xb60 fs/file_table.c:450 task_work_run+0x14e/0x250 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xadd/0x2ce0 kernel/exit.c:938 do_group_exit+0xd3/0x2a0 kernel/exit.c:1087 get_signal+0x24ed/0x26c0 kernel/signal.c:3017 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x147/0x260 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888125653e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc ffff888125653f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888125653f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888125654000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888125654080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: 00 e8 add %ch,%al 2: 90 nop 3: de 27 fisubs (%rdi) 5: 00 9c 5b 81 e3 00 02 add %bl,0x200e381(%rbx,%rbx,2) c: 00 00 add %al,(%rax) e: 31 ff xor %edi,%edi 10: 48 89 de mov %rbx,%rsi 13: e8 1e 39 20 00 call 0x203936 18: 48 85 db test %rbx,%rbx 1b: 0f 85 55 01 00 00 jne 0x176 21: e8 a0 36 20 00 call 0x2036c6 26: fb sti 27: 4c 89 e0 mov %r12,%rax * 2a: 48 c1 e8 03 shr $0x3,%rax <-- trapping instruction 2e: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) 33: 0f 84 11 ff ff ff je 0xffffff4a 39: 4c 89 e7 mov %r12,%rdi 3c: e8 .byte 0xe8 3d: 25 .byte 0x25 3e: 41 rex.B 3f: 7a .byte 0x7a --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
