KASAN: slab-use-after-free Read in sco_sock

Title	Replies (including bot)	Last reply
[PATCH] Bluetooth: SCO: remove the redundant sco_conn_put	2 (2)	2024/11/26 16:10
[syzbot] [bluetooth?] KASAN: slab-use-after-free Read in sco_sock_connect	1 (3)	2024/11/25 16:23

Created	Duration	User	Patch	Repo	Result
2024/11/25 14:50	22m	eadavis@qq.com	patch	upstream	OK log

Created

Duration

User

Patch

Repo

Result

2024/11/25 14:50

22m

eadavis@qq.com

patch

upstream

OK log

================================================================== BUG: KASAN: slab-use-after-free in __lock_acquire+0x2d90/0x3c40 kernel/locking/lockdep.c:5089 Read of size 8 at addr ffff88802e36fc20 by task syz.4.5353/17208 CPU: 0 UID: 0 PID: 17208 Comm: syz.4.5353 Not tainted 6.12.0-syzkaller-08446-g228a1157fb9f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 __lock_acquire+0x2d90/0x3c40 kernel/locking/lockdep.c:5089 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] sco_chan_add net/bluetooth/sco.c:292 [inline] sco_connect net/bluetooth/sco.c:345 [inline] sco_sock_connect+0x351/0xbd0 net/bluetooth/sco.c:645 __sys_connect_file+0x13e/0x1a0 net/socket.c:2055 __sys_connect+0x14f/0x170 net/socket.c:2074 __do_sys_connect net/socket.c:2080 [inline] __se_sys_connect net/socket.c:2077 [inline] __x64_sys_connect+0x72/0xb0 net/socket.c:2077 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0ec497e819 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0ec5705038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f0ec4b35fa0 RCX: 00007f0ec497e819 RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f0ec49f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0ec4b35fa0 R15: 00007fffedcfae08 </TASK> Allocated by task 17048: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kmalloc_noprof include/linux/slab.h:879 [inline] kzalloc_noprof include/linux/slab.h:1015 [inline] sco_conn_add net/bluetooth/sco.c:199 [inline] sco_conn_add+0xc8/0x410 net/bluetooth/sco.c:184 sco_connect net/bluetooth/sco.c:336 [inline] sco_sock_connect+0x325/0xbd0 net/bluetooth/sco.c:645 __sys_connect_file+0x13e/0x1a0 net/socket.c:2055 __sys_connect+0x14f/0x170 net/socket.c:2074 __do_sys_connect net/socket.c:2080 [inline] __se_sys_connect net/socket.c:2077 [inline] __x64_sys_connect+0x72/0xb0 net/socket.c:2077 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 17208: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kfree+0x14f/0x4b0 mm/slub.c:4727 sco_conn_free net/bluetooth/sco.c:97 [inline] kref_put include/linux/kref.h:65 [inline] sco_conn_put+0x2cd/0x4c0 net/bluetooth/sco.c:107 sco_conn_add+0x7b/0x410 net/bluetooth/sco.c:195 sco_connect net/bluetooth/sco.c:336 [inline] sco_sock_connect+0x325/0xbd0 net/bluetooth/sco.c:645 __sys_connect_file+0x13e/0x1a0 net/socket.c:2055 __sys_connect+0x14f/0x170 net/socket.c:2074 __do_sys_connect net/socket.c:2080 [inline] __se_sys_connect net/socket.c:2077 [inline] __x64_sys_connect+0x72/0xb0 net/socket.c:2077 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802e36fc00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 32 bytes inside of freed 256-byte region [ffff88802e36fc00, ffff88802e36fd00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2e36e head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 ksm flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801b041b40 ffffea0001f05700 dead000000000003 raw: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff88801b041b40 ffffea0001f05700 dead000000000003 head: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000 head: 00fff00000000001 ffffea0000b8db81 ffffffffffffffff 0000000000000000 head: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 8168075657, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474 __alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265 alloc_slab_page mm/slub.c:2412 [inline] allocate_slab mm/slub.c:2578 [inline] new_slab+0x2c9/0x410 mm/slub.c:2631 ___slab_alloc+0xdac/0x1880 mm/slub.c:3818 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908 __slab_alloc_node mm/slub.c:3961 [inline] slab_alloc_node mm/slub.c:4122 [inline] __do_kmalloc_node mm/slub.c:4263 [inline] __kmalloc_node_noprof+0x357/0x430 mm/slub.c:4270 __kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:658 v4l2_ctrl_new+0x99a/0x2090 drivers/media/v4l2-core/v4l2-ctrls-core.c:1931 v4l2_ctrl_new_std+0x1b3/0x280 drivers/media/v4l2-core/v4l2-ctrls-core.c:2068 handler_new_ref+0x828/0xc60 drivers/media/v4l2-core/v4l2-ctrls-core.c:1689 v4l2_ctrl_add_handler drivers/media/v4l2-core/v4l2-ctrls-core.c:2212 [inline] v4l2_ctrl_add_handler+0x22a/0x310 drivers/media/v4l2-core/v4l2-ctrls-core.c:2186 vivid_create_controls+0x2eaf/0x3e00 drivers/media/test-drivers/vivid/vivid-ctrls.c:1993 vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:1931 [inline] vivid_probe drivers/media/test-drivers/vivid/vivid-core.c:2093 [inline] vivid_probe+0x47df/0xae90 drivers/media/test-drivers/vivid/vivid-core.c:2078 platform_probe+0xff/0x1f0 drivers/base/platform.c:1404 page_owner free stack trace missing Memory state around the buggy address: ffff88802e36fb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802e36fb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88802e36fc00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802e36fc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802e36fd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/11/23 21:09	upstream	228a1157fb9f	68da6d95	.config	console log	report	syz / log			[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-selinux-root	KASAN: slab-use-after-free Read in sco_sock_connect

Crashes (1):

Assets (help?)