================================================================== BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:102 [inline] BUG: KASAN: use-after-free in atomic_inc include/linux/atomic/atomic-instrumented.h:190 [inline] BUG: KASAN: use-after-free in usb_anchor_suspend_wakeups+0x2c/0x74 drivers/usb/core/urb.c:942 Write of size 4 at addr ffff0000d0d07910 by task syz-executor364/6434 CPU: 0 PID: 6434 Comm: syz-executor364 Not tainted 6.1.123-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:427 kasan_report+0xd4/0x130 mm/kasan/report.c:531 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189 __kasan_check_write+0x2c/0x3c mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:102 [inline] atomic_inc include/linux/atomic/atomic-instrumented.h:190 [inline] usb_anchor_suspend_wakeups+0x2c/0x74 drivers/usb/core/urb.c:942 __usb_hcd_giveback_urb+0x1f4/0x504 drivers/usb/core/hcd.c:1662 usb_hcd_giveback_urb+0x108/0x3f8 drivers/usb/core/hcd.c:1758 dummy_timer+0x6a4/0x2770 drivers/usb/gadget/udc/dummy_hcd.c:1994 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x4b0/0xdc0 kernel/time/hrtimer.c:1753 hrtimer_run_softirq+0x158/0x21c kernel/time/hrtimer.c:1770 handle_softirqs+0x318/0xd58 kernel/softirq.c:571 __do_softirq+0x14/0x20 kernel/softirq.c:605 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:893 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x264/0x4d4 kernel/softirq.c:654 irq_exit_rcu+0x14/0x84 kernel/softirq.c:666 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:486 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline] ___slab_alloc+0x2a0/0xee0 mm/slub.c:3113 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x2c8/0x388 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc+0xc4/0x1c4 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] tomoyo_realpath_from_path+0xc8/0x4cc security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x1dc/0x3f4 security/tomoyo/file.c:771 tomoyo_file_open+0x130/0x19c security/tomoyo/tomoyo.c:320 security_file_open+0x6c/0xb0 security/security.c:1681 do_dentry_open+0x2a0/0xfa0 fs/open.c:869 vfs_open+0x7c/0x90 fs/open.c:1013 do_open fs/namei.c:3626 [inline] path_openat+0x1e14/0x2548 fs/namei.c:3783 do_filp_open+0x1bc/0x3cc fs/namei.c:3810 do_sys_openat2+0x128/0x3e0 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1345 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 6502: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace+0x7c/0x94 mm/slab_common.c:1031 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] usbtmc_open+0xb0/0x750 drivers/usb/class/usbtmc.c:175 usb_open+0x1c4/0x2c4 drivers/usb/core/file.c:48 chrdev_open+0x3e8/0x4fc fs/char_dev.c:414 do_dentry_open+0x734/0xfa0 fs/open.c:882 vfs_open+0x7c/0x90 fs/open.c:1013 do_open fs/namei.c:3626 [inline] path_openat+0x1e14/0x2548 fs/namei.c:3783 do_filp_open+0x1bc/0x3cc fs/namei.c:3810 do_sys_openat2+0x128/0x3e0 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1345 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Freed by task 6502: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x2c0/0x4b4 mm/slub.c:3674 kfree+0xcc/0x1b8 mm/slab_common.c:988 usbtmc_release+0x238/0x298 drivers/usb/class/usbtmc.c:261 __fput+0x1c8/0x7c8 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x240/0x2f0 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2080/0x2cb8 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000d0d07800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 272 bytes inside of 1024-byte region [ffff0000d0d07800, ffff0000d0d07c00) The buggy address belongs to the physical page: page:0000000098290873 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x110d00 head:0000000098290873 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000001 ffff0000c0002780 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d0d07800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d0d07880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000d0d07900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d0d07980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d0d07a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Unable to handle kernel paging request at virtual address dfff800000000012 KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000012] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6434 Comm: syz-executor364 Tainted: G B 6.1.123-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : dev_driver_string drivers/base/core.c:2356 [inline] pc : __dev_printk+0x7c/0x1a0 drivers/base/core.c:4956 lr : __dev_printk+0x2c/0x1a0 drivers/base/core.c:4953 sp : ffff800008007730 x29: ffff800008007730 x28: ffff0000d19a8430 x27: 1fffe0001a1a0f00 x26: dfff800000000000 x25: 0000000000000033 x24: dfff800000000000 x23: ffff700001000ef8 x22: 0000000000000097 x21: ffff800013378541 x20: 000000000000002f x19: ffff8000080077e0 x18: ffff0000d19a8448 x17: 0000000000000000 x16: ffff80001227aec0 x15: 0000000000000000 x14: 00000000ffffff98 x13: ffff0000d63d8000 x12: 0000000000000004 x11: 0000000000ff0100 x10: 0000000000000000 x9 : 0000000000000001 x8 : 0000000000000012 x7 : 0000000000000000 x6 : ffff8000084f39d8 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000020 x2 : ffff8000080077e0 x1 : 000000000000002f x0 : ffff800013378540 Call trace: dev_driver_string drivers/base/core.c:2356 [inline] __dev_printk+0x7c/0x1a0 drivers/base/core.c:4956 _dev_err+0x104/0x150 drivers/base/core.c:4998 usbtmc_read_bulk_cb+0x21c/0x38c drivers/usb/class/usbtmc.c:781 __usb_hcd_giveback_urb+0x2e0/0x504 drivers/usb/core/hcd.c:1675 usb_hcd_giveback_urb+0x108/0x3f8 drivers/usb/core/hcd.c:1758 dummy_timer+0x6a4/0x2770 drivers/usb/gadget/udc/dummy_hcd.c:1994 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x4b0/0xdc0 kernel/time/hrtimer.c:1753 hrtimer_run_softirq+0x158/0x21c kernel/time/hrtimer.c:1770 handle_softirqs+0x318/0xd58 kernel/softirq.c:571 __do_softirq+0x14/0x20 kernel/softirq.c:605 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:893 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x264/0x4d4 kernel/softirq.c:654 irq_exit_rcu+0x14/0x84 kernel/softirq.c:666 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:486 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline] ___slab_alloc+0x2a0/0xee0 mm/slub.c:3113 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x2c8/0x388 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc+0xc4/0x1c4 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] tomoyo_realpath_from_path+0xc8/0x4cc security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x1dc/0x3f4 security/tomoyo/file.c:771 tomoyo_file_open+0x130/0x19c security/tomoyo/tomoyo.c:320 security_file_open+0x6c/0xb0 security/security.c:1681 do_dentry_open+0x2a0/0xfa0 fs/open.c:869 vfs_open+0x7c/0x90 fs/open.c:1013 do_open fs/namei.c:3626 [inline] path_openat+0x1e14/0x2548 fs/namei.c:3783 do_filp_open+0x1bc/0x3cc fs/namei.c:3810 do_sys_openat2+0x128/0x3e0 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1345 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: 5400094a 9101a296 394002b9 d343fec8 (38786908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 5400094a b.ge 0x128 // b.tcont 4: 9101a296 add x22, x20, #0x68 8: 394002b9 ldrb w25, [x21] c: d343fec8 lsr x8, x22, #3 * 10: 38786908 ldrb w8, [x8, x24] <-- trapping instruction