================================================================== BUG: KASAN: slab-out-of-bounds in htc_process_conn_rsp drivers/net/wireless/ath/ath9k/htc_hst.c:131 [inline] BUG: KASAN: slab-out-of-bounds in ath9k_htc_rx_msg+0xa25/0xaf0 drivers/net/wireless/ath/ath9k/htc_hst.c:443 Write of size 2 at addr ffff8881cc95c620 by task systemd-udevd/156 CPU: 1 PID: 156 Comm: systemd-udevd Not tainted 5.7.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xef/0x16e lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd3/0x415 mm/kasan/report.c:382 __kasan_report.cold+0x37/0x7d mm/kasan/report.c:511 kasan_report+0x33/0x50 mm/kasan/common.c:625 htc_process_conn_rsp drivers/net/wireless/ath/ath9k/htc_hst.c:131 [inline] ath9k_htc_rx_msg+0xa25/0xaf0 drivers/net/wireless/ath/ath9k/htc_hst.c:443 ath9k_hif_usb_reg_in_cb+0x1c0/0x630 drivers/net/wireless/ath/ath9k/hif_usb.c:718 __usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716 dummy_timer+0x125e/0x32b4 drivers/usb/gadget/udc/dummy_hcd.c:1967 call_timer_fn+0x1ac/0x700 kernel/time/timer.c:1405 expire_timers kernel/time/timer.c:1450 [inline] __run_timers kernel/time/timer.c:1774 [inline] __run_timers kernel/time/timer.c:1741 [inline] run_timer_softirq+0x5f9/0x1500 kernel/time/timer.c:1787 __do_softirq+0x21e/0x9aa kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x178/0x1a0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x141/0x540 arch/x86/kernel/apic/apic.c:1140 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:do_raw_spin_unlock+0xf/0x220 kernel/locking/spinlock_debug.c:136 Code: eb 8b e8 74 19 ec ff e8 bf b8 41 00 eb a7 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 55 41 54 55 <48> 89 fd 48 83 c7 04 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 RSP: 0018:ffff8881d021fd88 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 1ffff1103a0b6a56 RDX: 0000000000000000 RSI: 1ffff1103a0b6a5d RDI: ffff8881cac1b8f8 RBP: ffff8881cac1b8f8 R08: ffff8881d05b4a40 R09: fffffbfff0fd1189 R10: ffffffff87e88c47 R11: fffffbfff0fd1188 R12: ffff8881cac1b8f8 R13: ffffffff81733175 R14: 0000000000000001 R15: 00005558aa4e6e30 __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock+0x1a/0x30 kernel/locking/spinlock.c:183 spin_unlock include/linux/spinlock.h:393 [inline] fast_dput fs/dcache.c:745 [inline] fast_dput fs/dcache.c:718 [inline] dput+0x52a/0xdf0 fs/dcache.c:846 path_put+0x2d/0x60 fs/namei.c:482 do_readlinkat+0x29e/0x300 fs/stat.c:424 __do_sys_readlinkat fs/stat.c:436 [inline] __se_sys_readlinkat fs/stat.c:433 [inline] __x64_sys_readlinkat+0x93/0xf0 fs/stat.c:433 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x7f791c34e0ba Code: 48 8b 0d e1 bd 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 0b 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ae bd 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffd83c73af8 EFLAGS: 00000202 ORIG_RAX: 000000000000010b RAX: ffffffffffffffda RBX: 00005558aa4f7c80 RCX: 00007f791c34e0ba RDX: 00005558aa4f7c80 RSI: 00005558aa4e6e30 RDI: 00000000ffffff9c RBP: 0000000000000064 R08: 00005558a9e16670 R09: 0000000000000070 R10: 0000000000000063 R11: 0000000000000202 R12: 00005558aa4e6e30 R13: 00000000ffffff9c R14: 00007ffd83c73b50 R15: 0000000000000063 Allocated by task 3272: save_stack+0x1b/0x40 mm/kasan/common.c:49 set_track mm/kasan/common.c:57 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468 kmalloc include/linux/slab.h:555 [inline] kzalloc include/linux/slab.h:669 [inline] ath9k_htc_hw_alloc+0x49/0x2e0 drivers/net/wireless/ath/ath9k/htc_hst.c:471 ath9k_hif_usb_firmware_cb+0x62/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1173 request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:1005 process_one_work+0x965/0x1630 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x326/0x430 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Freed by task 6100: save_stack+0x1b/0x40 mm/kasan/common.c:49 set_track mm/kasan/common.c:57 [inline] kasan_set_free_info mm/kasan/common.c:317 [inline] __kasan_slab_free+0x117/0x160 mm/kasan/common.c:456 slab_free_hook mm/slub.c:1455 [inline] slab_free_freelist_hook mm/slub.c:1488 [inline] slab_free mm/slub.c:3045 [inline] kfree+0xd5/0x300 mm/slub.c:4026 skb_free_head+0x8b/0xa0 net/core/skbuff.c:590 skb_release_data+0x41f/0x7c0 net/core/skbuff.c:610 skb_release_all+0x46/0x60 net/core/skbuff.c:664 __kfree_skb net/core/skbuff.c:678 [inline] consume_skb net/core/skbuff.c:837 [inline] consume_skb+0xf3/0x3c0 net/core/skbuff.c:831 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x53f/0x740 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362 ___sys_sendmsg+0x100/0x170 net/socket.c:2416 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 The buggy address belongs to the object at ffff8881cc95c000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1568 bytes inside of 2048-byte region [ffff8881cc95c000, ffff8881cc95c800) The buggy address belongs to the page: page:ffffea0007325600 refcount:1 mapcount:0 mapping:00000000a5d2013b index:0x0 head:ffffea0007325600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c000 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881cc95c500: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881cc95c580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881cc95c600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881cc95c680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881cc95c700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================