KASAN: use-after-free Read in unix_stream_read

Date	Name	Commit	Repro	Result
2023/11/11	linux-5.15.y (ToT)	80529b4968a8	C	[report] KASAN: use-after-free Read in unix_stream_read_actor
2023/11/11	upstream (ToT)	3ca112b71f35	C	Didn't crash

Date

Name

Commit

Repro

Result

2023/11/11

linux-5.15.y (ToT)

80529b4968a8

[report] KASAN: use-after-free Read in unix_stream_read_actor

2023/11/11

upstream (ToT)

3ca112b71f35

Didn't crash

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-6-1	KASAN: use-after-free Read in unix_stream_read_actor missing-backport origin:upstream	C	done	done	2	302d	376d	0/2	auto-obsoleted due to no activity on 2024/05/03 09:45
linux-6.1	KASAN: use-after-free Read in unix_stream_read_actor origin:lts-only	C		done	1	372d	376d	3/3	fixed on 2023/12/18 16:47
android-5-15	KASAN: use-after-free Read in unix_stream_read_actor origin:upstream	C			1	376d	376d	0/2	auto-obsoleted due to no activity on 2024/02/19 03:43
upstream	KASAN: slab-use-after-free Read in unix_stream_read_actor (2) net	C	inconclusive		4	82d	77d	28/28	fixed on 2024/10/22 11:56
upstream	KASAN: slab-use-after-free Read in unix_stream_read_actor net	C	error		6	360d	376d	25/28	fixed on 2024/01/20 21:18

Created	Duration	User	Patch	Repo	Result
2023/12/12 23:24	3h30m	bisect fix		linux-5.15.y	OK (1) job log
2023/11/12 15:31	1h30m	fix candidate		upstream	OK (0) job log log

Created

Duration

User

Patch

Repo

Result

2023/12/12 23:24

3h30m

bisect fix

linux-5.15.y

OK (1) job log

2023/11/12 15:31

1h30m

fix candidate

upstream

OK (0) job log log

================================================================== BUG: KASAN: use-after-free in unix_stream_read_actor+0x9e/0xa0 net/unix/af_unix.c:2809 Read of size 4 at addr ffff88801a231684 by task syz-executor758/3526 CPU: 1 PID: 3526 Comm: syz-executor758 Not tainted 5.15.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 unix_stream_read_actor+0x9e/0xa0 net/unix/af_unix.c:2809 unix_stream_recv_urg+0x1bb/0x300 net/unix/af_unix.c:2535 unix_stream_read_generic+0x21ab/0x22a0 net/unix/af_unix.c:2615 unix_stream_recvmsg+0x22d/0x2c0 net/unix/af_unix.c:2847 ____sys_recvmsg+0x286/0x530 ___sys_recvmsg+0x1ec/0x690 net/socket.c:2690 __sys_recvmsg net/socket.c:2720 [inline] __do_sys_recvmsg net/socket.c:2730 [inline] __se_sys_recvmsg net/socket.c:2727 [inline] __x64_sys_recvmsg+0x1dc/0x2b0 net/socket.c:2727 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f522e1634e9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f522e0e2228 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007f522e1634e9 RDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007f522e1ed348 R08: 00007f522e0e26c0 R09: 00007f522e0e26c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f522e1ed340 R13: 00007f522e1ed34c R14: 00007fff5b9c08c0 R15: 00007fff5b9c09a8 </TASK> Allocated by task 3525: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] kmem_cache_alloc_node+0x121/0x2c0 mm/slub.c:3256 __alloc_skb+0xdd/0x590 net/core/skbuff.c:415 alloc_skb include/linux/skbuff.h:1167 [inline] alloc_skb_with_frags+0xa3/0x780 net/core/skbuff.c:6132 sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2512 queue_oob+0xfd/0x8d0 net/unix/af_unix.c:1980 unix_stream_sendmsg+0xe0a/0x1070 net/unix/af_unix.c:2117 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2429 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2483 __sys_sendmsg net/socket.c:2512 [inline] __do_sys_sendmsg net/socket.c:2521 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2519 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Freed by task 3525: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x91/0x1f0 mm/slub.c:3515 queue_oob+0x524/0x8d0 net/unix/af_unix.c:2011 unix_stream_sendmsg+0xe0a/0x1070 net/unix/af_unix.c:2117 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2429 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2483 __sys_sendmsg net/socket.c:2512 [inline] __do_sys_sendmsg net/socket.c:2521 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2519 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88801a231640 which belongs to the cache skbuff_head_cache of size 232 The buggy address is located 68 bytes inside of 232-byte region [ffff88801a231640, ffff88801a231728) The buggy address belongs to the page: page:ffffea0000688c40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a231 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff8880165e8500 raw: 0000000000000000 00000000000c000c 00000001ffffffff 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 3525, ts 52575496142, free_ts 45832208612 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] kmem_cache_alloc_node+0x1ba/0x2c0 mm/slub.c:3256 __alloc_skb+0xdd/0x590 net/core/skbuff.c:415 alloc_skb include/linux/skbuff.h:1167 [inline] alloc_skb_with_frags+0xa3/0x780 net/core/skbuff.c:6132 sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2512 queue_oob+0xfd/0x8d0 net/unix/af_unix.c:1980 unix_stream_sendmsg+0xe0a/0x1070 net/unix/af_unix.c:2117 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2429 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2483 __sys_sendmsg net/socket.c:2512 [inline] __do_sys_sendmsg net/socket.c:2521 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2519 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 pipe_buf_release include/linux/pipe_fs_i.h:203 [inline] pipe_read+0x6e4/0x12b0 fs/pipe.c:323 call_read_iter include/linux/fs.h:2097 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0xa9f/0xe10 fs/read_write.c:485 ksys_read+0x1a2/0x2c0 fs/read_write.c:623 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff88801a231580: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ffff88801a231600: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb >ffff88801a231680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801a231700: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc ffff88801a231780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/11/11 04:31	linux-5.15.y	80529b4968a8	d80eec66	.config	console log	report	syz	C			ci2-linux-5-15-kasan-perf	KASAN: use-after-free Read in unix_stream_read_actor

Crashes (1):

Assets (help?)