================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline] BUG: KASAN: slab-use-after-free in usb_anchor_suspend_wakeups+0x2c/0x74 drivers/usb/core/urb.c:927 Write of size 4 at addr ffff0000c6ad2910 by task sed/7763 CPU: 1 UID: 0 PID: 7763 Comm: sed Not tainted 6.16.0-rc6-syzkaller-gaaef6f251176 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x220 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:480 kasan_report+0xb0/0x110 mm/kasan/report.c:593 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189 __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline] usb_anchor_suspend_wakeups+0x2c/0x74 drivers/usb/core/urb.c:927 __usb_hcd_giveback_urb+0x1f4/0x570 drivers/usb/core/hcd.c:1636 usb_hcd_giveback_urb+0x100/0x364 drivers/usb/core/hcd.c:1734 dummy_timer+0x648/0x33c8 drivers/usb/gadget/udc/dummy_hcd.c:1995 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x41c/0xb78 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x160/0x400 kernel/time/hrtimer.c:1842 handle_softirqs+0x328/0xc88 kernel/softirq.c:579 __do_softirq+0x14/0x20 kernel/softirq.c:613 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:68 call_on_irq_stack+0x24/0x30 arch/arm64/kernel/entry.S:887 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:73 invoke_softirq kernel/softirq.c:460 [inline] __irq_exit_rcu+0x1b0/0x478 kernel/softirq.c:680 irq_exit_rcu+0x14/0x84 kernel/softirq.c:696 __el1_irq arch/arm64/kernel/entry-common.c:654 [inline] el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:668 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:673 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P) arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] (P) raw_spin_rq_unlock_irq kernel/sched/sched.h:1544 [inline] (P) finish_lock_switch+0xb4/0x1c0 kernel/sched/core.c:5145 (P) finish_task_switch+0x120/0x5a4 kernel/sched/core.c:5263 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1418/0x2a28 kernel/sched/core.c:6786 preempt_schedule_irq+0x80/0x188 kernel/sched/core.c:7109 arm64_preempt_schedule_irq+0x44/0x58 arch/arm64/kernel/entry-common.c:305 __el1_irq arch/arm64/kernel/entry-common.c:656 [inline] el1_interrupt+0x3c/0x54 arch/arm64/kernel/entry-common.c:668 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:673 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592 bytes_is_nonzero mm/kasan/generic.c:86 [inline] (P) memory_is_nonzero mm/kasan/generic.c:122 [inline] (P) memory_is_poisoned_n mm/kasan/generic.c:129 [inline] (P) memory_is_poisoned mm/kasan/generic.c:161 [inline] (P) check_region_inline mm/kasan/generic.c:180 [inline] (P) kasan_check_range+0x1dc/0x2a4 mm/kasan/generic.c:189 (P) __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline] mt_validate_nulls lib/maple_tree.c:7551 [inline] mt_validate+0x3b40/0x3ff4 lib/maple_tree.c:7601 validate_mm+0xb8/0x41c mm/vma.c:648 __split_vma+0x7e4/0x924 mm/vma.c:566 vms_gather_munmap_vmas+0x2a0/0xf54 mm/vma.c:1354 __mmap_prepare mm/vma.c:2351 [inline] __mmap_region mm/vma.c:2607 [inline] mmap_region+0x54c/0x1c0c mm/vma.c:2692 do_mmap+0x968/0xfac mm/mmap.c:561 vm_mmap_pgoff+0x2b8/0x43c mm/util.c:579 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:607 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Allocated by task 7701: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x2a4/0x3fc mm/slub.c:4359 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] usbtmc_open+0xa8/0x78c drivers/usb/class/usbtmc.c:175 usb_open+0x138/0x1c8 drivers/usb/core/file.c:47 chrdev_open+0x1b0/0x4b0 fs/char_dev.c:414 do_dentry_open+0xb7c/0x1544 fs/open.c:964 vfs_open+0x44/0x2d4 fs/open.c:1094 do_open fs/namei.c:3896 [inline] path_openat+0x2424/0x2c40 fs/namei.c:4055 do_filp_open+0x18c/0x36c fs/namei.c:4082 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Freed by task 7701: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_free_info+0x58/0x70 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x68/0x88 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free mm/slub.c:4643 [inline] kfree+0x17c/0x474 mm/slub.c:4842 usbtmc_release+0x238/0x298 drivers/usb/class/usbtmc.c:261 __fput+0x340/0x75c fs/file_table.c:465 ____fput+0x20/0x58 fs/file_table.c:493 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x174/0x1f4 arch/arm64/kernel/entry-common.c:155 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 The buggy address belongs to the object at ffff0000c6ad2800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 272 bytes inside of freed 1024-byte region [ffff0000c6ad2800, ffff0000c6ad2c00) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106ad0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c0001dc0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c0001dc0 dead000000000100 dead000000000122 head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc31ab401 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c6ad2800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000c6ad2880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000c6ad2900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000c6ad2980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000c6ad2a00: 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 dfff800000000000 KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000000] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 7763 Comm: sed Tainted: G B 6.16.0-rc6-syzkaller-gaaef6f251176 #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : set_dev_info drivers/base/core.c:-1 [inline] pc : dev_vprintk_emit+0x108/0x390 drivers/base/core.c:4915 lr : set_dev_info drivers/base/core.c:4873 [inline] lr : dev_vprintk_emit+0xdc/0x390 drivers/base/core.c:4915 sp : ffff800080017500 x29: ffff800080017600 x28: dfff800000000000 x27: ffff800080017520 x26: ffff700010002ea4 x25: 0000000000000033 x24: 0000000000000002 x23: ffff80008ff59bf8 x22: ffff800080017540 x21: ffff8000800176a0 x20: 0000000000000003 x19: ffff80008c482ac0 x18: 1fffe000337d6476 x17: 0000000000000000 x16: ffff80008ae67e88 x15: 0000000000000008 x14: 1ffff00010002ea8 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700010002eb0 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : ffff800080017790 x5 : ffff8000800176c0 x4 : 0000000000000000 x3 : ffff8000801590d8 x2 : ffffffffffffffc0 x1 : 0000000000000000 x0 : ffff800080017540 Call trace: set_dev_info drivers/base/core.c:-1 [inline] (P) dev_vprintk_emit+0x108/0x390 drivers/base/core.c:4915 (P) dev_printk_emit+0xd4/0x11c drivers/base/core.c:4928 __dev_printk+0x16c/0x1a0 drivers/base/core.c:4940 _dev_err+0xec/0x138 drivers/base/core.c:4983 usbtmc_read_bulk_cb+0x214/0x394 drivers/usb/class/usbtmc.c:787 __usb_hcd_giveback_urb+0x308/0x570 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x100/0x364 drivers/usb/core/hcd.c:1734 dummy_timer+0x648/0x33c8 drivers/usb/gadget/udc/dummy_hcd.c:1995 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x41c/0xb78 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x160/0x400 kernel/time/hrtimer.c:1842 handle_softirqs+0x328/0xc88 kernel/softirq.c:579 __do_softirq+0x14/0x20 kernel/softirq.c:613 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:68 call_on_irq_stack+0x24/0x30 arch/arm64/kernel/entry.S:887 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:73 invoke_softirq kernel/softirq.c:460 [inline] __irq_exit_rcu+0x1b0/0x478 kernel/softirq.c:680 irq_exit_rcu+0x14/0x84 kernel/softirq.c:696 __el1_irq arch/arm64/kernel/entry-common.c:654 [inline] el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:668 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:673 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P) arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] (P) raw_spin_rq_unlock_irq kernel/sched/sched.h:1544 [inline] (P) finish_lock_switch+0xb4/0x1c0 kernel/sched/core.c:5145 (P) finish_task_switch+0x120/0x5a4 kernel/sched/core.c:5263 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1418/0x2a28 kernel/sched/core.c:6786 preempt_schedule_irq+0x80/0x188 kernel/sched/core.c:7109 arm64_preempt_schedule_irq+0x44/0x58 arch/arm64/kernel/entry-common.c:305 __el1_irq arch/arm64/kernel/entry-common.c:656 [inline] el1_interrupt+0x3c/0x54 arch/arm64/kernel/entry-common.c:668 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:673 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592 bytes_is_nonzero mm/kasan/generic.c:86 [inline] (P) memory_is_nonzero mm/kasan/generic.c:122 [inline] (P) memory_is_poisoned_n mm/kasan/generic.c:129 [inline] (P) memory_is_poisoned mm/kasan/generic.c:161 [inline] (P) check_region_inline mm/kasan/generic.c:180 [inline] (P) kasan_check_range+0x1dc/0x2a4 mm/kasan/generic.c:189 (P) __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline] mt_validate_nulls lib/maple_tree.c:7551 [inline] mt_validate+0x3b40/0x3ff4 lib/maple_tree.c:7601 validate_mm+0xb8/0x41c mm/vma.c:648 __split_vma+0x7e4/0x924 mm/vma.c:566 vms_gather_munmap_vmas+0x2a0/0xf54 mm/vma.c:1354 __mmap_prepare mm/vma.c:2351 [inline] __mmap_region mm/vma.c:2607 [inline] mmap_region+0x54c/0x1c0c mm/vma.c:2692 do_mmap+0x968/0xfac mm/mmap.c:561 vm_mmap_pgoff+0x2b8/0x43c mm/util.c:579 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:607 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Code: f9400318 b4000b98 941716bf d343ff08 (387c6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f9400318 ldr x24, [x24] 4: b4000b98 cbz x24, 0x174 8: 941716bf bl 0x5c5b04 c: d343ff08 lsr x8, x24, #3 * 10: 387c6908 ldrb w8, [x8, x28] <-- trapping instruction