Bluetooth: hci2: command 0x0419 tx timeout Bluetooth: hci4: command 0x0419 tx timeout Bluetooth: hci5: command 0x0419 tx timeout Bluetooth: hci3: command 0x0419 tx timeout ================================================================== BUG: KASAN: use-after-free in put_tty_queue drivers/tty/n_tty.c:304 [inline] BUG: KASAN: use-after-free in n_tty_receive_buf_standard drivers/tty/n_tty.c:1564 [inline] BUG: KASAN: use-after-free in __receive_buf drivers/tty/n_tty.c:1631 [inline] BUG: KASAN: use-after-free in n_tty_receive_buf_common+0x1df0/0x2e40 drivers/tty/n_tty.c:1727 Read of size 1 at addr ffff880097592101 by task syz-executor.3/10449 CPU: 1 PID: 10449 Comm: syz-executor.3 Not tainted 4.18.0-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+0x15a/0x20d lib/dump_stack.c:113 print_address_description.cold.6+0x9/0x244 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold.7+0x242/0x305 mm/kasan/report.c:396 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430 put_tty_queue drivers/tty/n_tty.c:304 [inline] n_tty_receive_buf_standard drivers/tty/n_tty.c:1564 [inline] __receive_buf drivers/tty/n_tty.c:1631 [inline] n_tty_receive_buf_common+0x1df0/0x2e40 drivers/tty/n_tty.c:1727 n_tty_receive_buf2+0xf/0x20 drivers/tty/n_tty.c:1762 tty_ldisc_receive_buf+0x86/0x1b0 drivers/tty/tty_buffer.c:456 paste_selection+0x253/0x3e0 drivers/tty/vt/selection.c:349 tioclinux+0x10b/0x390 drivers/tty/vt/vt.c:2693 vt_ioctl+0x187a/0x2120 drivers/tty/vt/vt_ioctl.c:362 tty_ioctl+0x456/0x1280 drivers/tty/tty_io.c:2655 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x196/0x1050 fs/ioctl.c:684 ksys_ioctl+0x62/0x90 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:706 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f72a7a58188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fffb9c72c9f R14: 00007f72a7a58300 R15: 0000000000022000 Allocated by task 10498: save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc.part.1+0x62/0xf0 mm/kasan/kasan.c:553 kasan_kmalloc+0xaf/0xc0 mm/kasan/kasan.c:538 __kmalloc+0x15f/0x3a0 mm/slub.c:3753 kmalloc_array include/linux/slab.h:635 [inline] set_selection+0x657/0xe40 drivers/tty/vt/selection.c:283 tioclinux+0xf6/0x390 drivers/tty/vt/vt.c:2689 vt_ioctl+0x187a/0x2120 drivers/tty/vt/vt_ioctl.c:362 tty_ioctl+0x456/0x1280 drivers/tty/tty_io.c:2655 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x196/0x1050 fs/ioctl.c:684 ksys_ioctl+0x62/0x90 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:706 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 10505: save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x167/0x240 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 slab_free_hook mm/slub.c:1373 [inline] slab_free_freelist_hook mm/slub.c:1400 [inline] slab_free mm/slub.c:2955 [inline] kfree+0x130/0x3b0 mm/slub.c:3908 set_selection+0x67c/0xe40 drivers/tty/vt/selection.c:290 tioclinux+0xf6/0x390 drivers/tty/vt/vt.c:2689 vt_ioctl+0x187a/0x2120 drivers/tty/vt/vt_ioctl.c:362 tty_ioctl+0x456/0x1280 drivers/tty/tty_io.c:2655 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x196/0x1050 fs/ioctl.c:684 ksys_ioctl+0x62/0x90 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:706 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff880097592100 which belongs to the cache kmalloc-8192 of size 8192 The buggy address is located 1 bytes inside of 8192-byte region [ffff880097592100, ffff880097594100) The buggy address belongs to the page: page:ffffea00025d6400 count:1 mapcount:0 mapping:ffff88013fe10400 index:0x0 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea0002caee00 0000000200000002 ffff88013fe10400 raw: 0000000000000000 0000000000030003 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page allocated via order 3, migratetype Unmovable, gfp_mask 0x152c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:1906 [inline] prep_new_page mm/page_alloc.c:1914 [inline] get_page_from_freelist+0x2f35/0x46b0 mm/page_alloc.c:3345 __alloc_pages_nodemask+0x39e/0x2780 mm/page_alloc.c:4369 alloc_pages_current+0xd6/0x1b0 mm/mempolicy.c:2093 alloc_pages include/linux/gfp.h:492 [inline] alloc_slab_page mm/slub.c:1440 [inline] allocate_slab mm/slub.c:1585 [inline] new_slab+0x4a9/0x850 mm/slub.c:1656 new_slab_objects mm/slub.c:2419 [inline] ___slab_alloc+0x609/0x940 mm/slub.c:2571 __slab_alloc.isra.22+0x78/0xe0 mm/slub.c:2611 slab_alloc_node mm/slub.c:2674 [inline] slab_alloc mm/slub.c:2716 [inline] __kmalloc_track_caller+0x288/0x360 mm/slub.c:4292 kmemdup+0x1b/0x40 mm/util.c:118 kmemdup include/linux/string.h:418 [inline] ipv4_sysctl_init_net+0x37/0x2e0 net/ipv4/sysctl_net_ipv4.c:1210 ops_init+0x99/0x380 net/core/net_namespace.c:128 setup_net+0x2b3/0x650 net/core/net_namespace.c:313 copy_net_ns+0x1ae/0x2a0 net/core/net_namespace.c:436 create_new_namespaces+0x483/0x750 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0x87/0x1a0 kernel/nsproxy.c:206 ksys_unshare+0x31b/0x710 kernel/fork.c:2442 __do_sys_unshare kernel/fork.c:2510 [inline] __se_sys_unshare kernel/fork.c:2508 [inline] __x64_sys_unshare+0x2c/0x40 kernel/fork.c:2508 Memory state around the buggy address: ffff880097592000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff880097592080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff880097592100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff880097592180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff880097592200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff c3 inc %ebx 2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 40 00 nopl 0x0(%rax) 10: 48 89 f8 mov %rdi,%rax 13: 48 89 f7 mov %rsi,%rdi 16: 48 89 d6 mov %rdx,%rsi 19: 48 89 ca mov %rcx,%rdx 1c: 4d 89 c2 mov %r8,%r10 1f: 4d 89 c8 mov %r9,%r8 22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 27: 0f 05 syscall 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 2f: 73 01 jae 0x32 31: c3 retq 32: 48 c7 c1 bc ff ff ff mov $0xffffffffffffffbc,%rcx 39: f7 d8 neg %eax 3b: 64 89 01 mov %eax,%fs:(%rcx) 3e: 48 rex.W