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In-Reply-To: <20260707125337.246111-1-malayarout91@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a4d0b12.c76b52dc.34afef.000c.GAE@google.com> Subject: Re: [syzbot] [wireless?] [usb?] WARNING in __carl9170_tx_process_status From: syzbot To: linux-kernel@vger.kernel.org, malayarout91@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-out-of-bounds Read in carl9170_tx_process_status ================================================================== BUG: KASAN: slab-out-of-bounds in carl9170_tx_process_status+0x21f/0x230 drivers/net/wireless/ath/carl9170/tx.c:703 Read of size 1 at addr ffff8881087e9b41 by task swapper/1/0 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 carl9170_tx_process_status+0x21f/0x230 drivers/net/wireless/ath/carl9170/tx.c:703 carl9170_handle_command_response+0x3c8/0xc50 drivers/net/wireless/ath/carl9170/rx.c:219 carl9170_usb_rx_irq_complete+0xfc/0x1b0 drivers/net/wireless/ath/carl9170/usb.c:307 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 dummy_timer+0xda1/0x36c0 drivers/usb/gadget/udc/dummy_hcd.c:2005 __run_hrtimer kernel/time/hrtimer.c:2032 [inline] __hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2096 hrtimer_run_softirq+0x17d/0x2c0 kernel/time/hrtimer.c:2113 handle_softirqs+0x1dd/0x990 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x160/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64 Code: 90 ac 01 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 03 8f 0b 00 fb f4 3c f6 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 RSP: 0018:ffffc9000013fe10 EFLAGS: 00000246 RAX: 0000000000073eaf RBX: ffff8881022d9e00 RCX: ffffffff877af8e5 RDX: 0000000000000000 RSI: ffffffff890edf5a RDI: ffffffff87b15200 RBP: ffffed102045b3c0 R08: 0000000000000001 R09: ffffed103eae670d R10: ffff8881f573386b R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 1ffff92000027fc6 R15: dffffc0000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline] default_idle+0x9/0x10 arch/x86/kernel/process.c:768 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:199 [inline] do_idle+0x3a7/0x5b0 kernel/sched/idle.c:355 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:454 start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312 common_startup_64+0x13e/0x158 Allocated by task 23: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x35e/0x670 mm/slub.c:5515 _kmalloc_noprof include/linux/slab.h:969 [inline] carl9170_usb_send_rx_irq_urb.constprop.0+0x62/0x340 drivers/net/wireless/ath/carl9170/usb.c:500 carl9170_usb_init_device drivers/net/wireless/ath/carl9170/usb.c:946 [inline] carl9170_usb_firmware_finish drivers/net/wireless/ath/carl9170/usb.c:1006 [inline] carl9170_usb_firmware_step2+0x173/0x240 drivers/net/wireless/ath/carl9170/usb.c:1035 request_firmware_work_func+0x13f/0x440 drivers/base/firmware_loader/main.c:1164 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff8881087e9b00 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 1 bytes to the right of allocated 64-byte region [ffff8881087e9b00, ffff8881087e9b40) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1087e9 flags: 0x200000000000000(node=0|zone=2) page_type: f5(slab) raw: 0200000000000000 ffff8881000418c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800200020 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 6669157810, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0xf25/0x3400 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x28f/0x2b90 mm/page_alloc.c:5304 alloc_slab_page mm/slub.c:3294 [inline] allocate_slab mm/slub.c:3408 [inline] new_slab+0xa2/0x670 mm/slub.c:3454 refill_objects+0xe3/0x410 mm/slub.c:7338 refill_sheaf mm/slub.c:2832 [inline] __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4703 alloc_from_pcs mm/slub.c:4801 [inline] slab_alloc_node mm/slub.c:4933 [inline] __do_kmalloc_node mm/slub.c:5361 [inline] __kmalloc_noprof+0x60d/0x7c0 mm/slub.c:5387 _kmalloc_noprof include/linux/slab.h:973 [inline] _kzalloc_noprof include/linux/slab.h:1290 [inline] kobject_get_path+0xcf/0x2c0 lib/kobject.c:161 kobject_uevent_env+0x287/0x18b0 lib/kobject_uevent.c:548 driver_register+0x29c/0x360 drivers/base/driver.c:182 ohci_platform_init+0x51/0x70 drivers/usb/host/ohci-platform.c:381 do_one_initcall+0x11d/0x700 init/main.c:1347 do_initcall_level init/main.c:1409 [inline] do_initcalls init/main.c:1425 [inline] do_basic_setup init/main.c:1445 [inline] kernel_init_freeable+0x6ea/0x7b0 init/main.c:1658 kernel_init+0x1f/0x1e0 init/main.c:1548 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 page_owner free stack trace missing Memory state around the buggy address: ffff8881087e9a00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff8881087e9a80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8881087e9b00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8881087e9b80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8881087e9c00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ================================================================== ---------------- Code disassembly (best guess): 0: 90 nop 1: ac lods %ds:(%rsi),%al 2: 01 c3 add %eax,%ebx 4: cc int3 5: cc int3 6: cc int3 7: cc int3 8: 0f 1f 00 nopl (%rax) b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: f3 0f 1e fa endbr64 1f: 66 90 xchg %ax,%ax 21: 0f 00 2d 03 8f 0b 00 verw 0xb8f03(%rip) # 0xb8f2b 28: fb sti 29: f4 hlt * 2a: e9 3c f6 02 00 jmp 0x2f66b <-- trapping instruction 2f: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 36: 00 00 00 39: 66 90 xchg %ax,%ax 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop Tested on: commit: dc59e4fe Linux 7.2-rc1 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=162c7546580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6ec4d592e55f7960 dashboard link: https://syzkaller.appspot.com/bug?extid=381102a7292a374fe8a7 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=15555b39580000