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KASAN: use-after-free Read in rose_transmit_link

Status: upstream: reported C repro on 2025/05/03 13:00
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+84ac815d6e53a68f443f@syzkaller.appspotmail.com
First crash: 359d, last: 17h14m
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2025/07/24 upstream (ToT) dd9c17322a6c C [report] KASAN: slab-use-after-free Read in rose_transmit_link
▶ ▼ Similar bugs (9)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 KASAN: use-after-free Read in rose_transmit_link 19 75 186d 355d 0/3 auto-obsoleted due to no activity on 2026/01/02 00:59
upstream general protection fault in rose_transmit_link (3) hams 10 27 771d 1397d 0/29 auto-obsoleted due to no activity on 2024/06/26 03:46
linux-6.6 general protection fault in rose_transmit_link 2 C error 10 68d 111d 0/2 upstream: reported C repro on 2026/01/06 18:54
upstream general protection fault in rose_transmit_link (2) hams 2 3 1528d 1545d 0/29 auto-closed as invalid on 2022/05/21 05:59
upstream general protection fault in rose_transmit_link (4) hams 21 C error 2058 31d 102d 27/29 upstream: reported C repro on 2026/01/15 20:26
linux-6.1 BUG: unable to handle kernel paging request in rose_transmit_link 8 C error 3 69d 69d 0/3 upstream: reported C repro on 2026/02/17 22:46
linux-4.19 general protection fault in rose_transmit_link 2 1 1549d 1549d 0/1 auto-closed as invalid on 2022/05/29 13:41
linux-6.6 KASAN: slab-use-after-free Read in rose_transmit_link origin:upstream missing-backport 19 C done 43 237d 297d 2/2 fixed on 2025/10/12 11:51
upstream general protection fault in rose_transmit_link hams 2 1 2457d 2453d 0/29 auto-closed as invalid on 2019/11/03 18:16
▶ ▼ Last patch testing requests (9)
Created Duration User Patch Repo Result
2026/04/15 09:21 14m retest repro linux-5.15.y report log
2026/04/15 09:21 12m retest repro linux-5.15.y report log
2026/04/15 09:21 17m retest repro linux-5.15.y report log
2025/12/22 23:17 12m retest repro linux-5.15.y report log
2025/12/22 23:17 10m retest repro linux-5.15.y report log
2025/12/22 23:17 13m retest repro linux-5.15.y report log
2025/09/22 02:33 14m retest repro linux-5.15.y report log
2025/09/22 02:33 13m retest repro linux-5.15.y report log
2025/09/22 02:33 12m retest repro linux-5.15.y report log

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in rose_transmit_link+0x5b0/0x730 net/rose/rose_link.c:266
Read of size 1 at addr ffff88802b6d0432 by task syz.4.93/4651

CPU: 1 PID: 4651 Comm: syz.4.93 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 rose_transmit_link+0x5b0/0x730 net/rose/rose_link.c:266
 rose_write_internal+0x673/0x1e80 net/rose/rose_subr.c:198
 rose_release+0x22a/0x4e0 net/rose/af_rose.c:670
 __sock_release net/socket.c:649 [inline]
 sock_close+0xd5/0x240 net/socket.c:1336
 __fput+0x234/0x930 fs/file_table.c:311
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 get_signal+0x1222/0x12c0 kernel/signal.c:2672
 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f88de19cbe9
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:00007f88dd7eb038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffe00 RBX: 00007f88de3c4090 RCX: 00007f88de19cbe9
RDX: 0000000000000040 RSI: 0000200000000100 RDI: 000000000000000c
RBP: 00007f88de21fe19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f88de3c4128 R14: 00007f88de3c4090 R15: 00007fff858b9ef8
 </TASK>

Allocated by task 4372:
 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_kmalloc mm/kasan/common.c:513 [inline]
 __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522
 kmalloc include/linux/slab.h:604 [inline]
 rose_add_node+0x227/0xdb0 net/rose/rose_route.c:85
 rose_rt_ioctl+0x9db/0xe20 net/rose/rose_route.c:738
 rose_ioctl+0x27a/0x790 net/rose/af_rose.c:1372
 sock_do_ioctl+0xd3/0x2f0 net/socket.c:1140
 sock_ioctl+0x4ed/0x6e0 net/socket.c:1257
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Freed by task 4656:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd5/0x110 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+0xea/0x170 mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kfree+0xef/0x2a0 mm/slub.c:4559
 rose_rt_device_down+0x4e2/0x530 net/rose/rose_route.c:515
 rose_device_event+0x5ec/0x680 net/rose/af_rose.c:247
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:391
 call_netdevice_notifiers_extack net/core/dev.c:2061 [inline]
 call_netdevice_notifiers net/core/dev.c:2075 [inline]
 __dev_notify_flags+0x178/0x2d0 net/core/dev.c:-1
 dev_change_flags+0xe3/0x1a0 net/core/dev.c:8929
 dev_ifsioc+0x147/0xe70 net/core/dev_ioctl.c:324
 dev_ioctl+0x55f/0xe50 net/core/dev_ioctl.c:587
 sock_do_ioctl+0x222/0x2f0 net/socket.c:1154
 sock_ioctl+0x4ed/0x6e0 net/socket.c:1257
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff88802b6d0400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 50 bytes inside of
 512-byte region [ffff88802b6d0400, ffff88802b6d0600)
The buggy address belongs to the page:
page:ffffea0000adb400 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802b6d3c00 pfn:0x2b6d0
head:ffffea0000adb400 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0001c49f08 ffffea0000841508 ffff888016841c80
raw: ffff88802b6d3c00 000000000010000f 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3452, ts 25860146878, free_ts 0
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192
 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5474
 alloc_slab_page mm/slub.c:1775 [inline]
 allocate_slab mm/slub.c:1912 [inline]
 new_slab+0xc0/0x4b0 mm/slub.c:1975
 ___slab_alloc+0x81e/0xdf0 mm/slub.c:3008
 __slab_alloc mm/slub.c:3095 [inline]
 slab_alloc_node mm/slub.c:3186 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc_trace+0x1a5/0x2a0 mm/slub.c:3245
 kmalloc include/linux/slab.h:604 [inline]
 kzalloc include/linux/slab.h:735 [inline]
 alloc_bprm+0x56/0x6a0 fs/exec.c:1516
 kernel_execve+0x49/0x900 fs/exec.c:1978
 call_usermodehelper_exec_async+0x207/0x350 kernel/umh.c:112
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88802b6d0300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802b6d0380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802b6d0400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88802b6d0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802b6d0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (214):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/12 07:09 linux-5.15.y c79648372d02 c06e8995 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2025/08/04 13:09 linux-5.15.y c79648372d02 7368264b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2025/07/19 15:45 linux-5.15.y c79648372d02 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/04/27 13:19 linux-5.15.y b9d57c40a767 0f700595 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/04/24 11:45 linux-5.15.y b9d57c40a767 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/04/24 07:24 linux-5.15.y b9d57c40a767 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/04/23 06:18 linux-5.15.y b9d57c40a767 b10da5ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/04/22 19:34 linux-5.15.y b9d57c40a767 4595e353 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/04/22 19:32 linux-5.15.y b9d57c40a767 4595e353 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/04/22 05:44 linux-5.15.y b9d57c40a767 0b6ab7ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/04/22 03:17 linux-5.15.y b9d57c40a767 0b6ab7ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/04/01 04:16 linux-5.15.y 91d48252ad4b fb8b2c26 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/30 17:14 linux-5.15.y 91d48252ad4b dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/30 15:06 linux-5.15.y 91d48252ad4b dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/29 04:37 linux-5.15.y 91d48252ad4b b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/29 01:50 linux-5.15.y 91d48252ad4b b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/28 21:02 linux-5.15.y 91d48252ad4b b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/26 04:38 linux-5.15.y 91d48252ad4b c6143aac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/25 18:10 linux-5.15.y 91d48252ad4b 8ee77f7d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/25 13:46 linux-5.15.y 91d48252ad4b 8ee77f7d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/24 18:49 linux-5.15.y 91d48252ad4b 74e70d19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/22 19:29 linux-5.15.y 91d48252ad4b 5b92003d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/10 09:29 linux-5.15.y 91d48252ad4b 6972f302 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/10 01:01 linux-5.15.y 91d48252ad4b 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/09 19:15 linux-5.15.y 91d48252ad4b 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/09 00:27 linux-5.15.y 91d48252ad4b 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/05 04:21 linux-5.15.y 91d48252ad4b a9fe5c9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/04 18:53 linux-5.15.y 91d48252ad4b e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/03 04:55 linux-5.15.y 3330a8d33e08 28b83e23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/03/02 17:41 linux-5.15.y 3330a8d33e08 b9dd6534 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/02/28 10:24 linux-5.15.y 3330a8d33e08 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/02/27 22:16 linux-5.15.y 3330a8d33e08 2cf092b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/02/13 23:22 linux-5.15.y e45d5d41c134 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/02/13 10:11 linux-5.15.y e45d5d41c134 6a673c50 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/02/08 11:06 linux-5.15.y 7b232985052f 4c131dc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/02/07 11:32 linux-5.15.y 7b232985052f f20fc9f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/02/07 07:12 linux-5.15.y 7b232985052f f20fc9f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/02/06 06:48 linux-5.15.y 9eec9a14ee10 f03c4191 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/01/26 08:38 linux-5.15.y 9eec9a14ee10 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/01/26 04:20 linux-5.15.y 9eec9a14ee10 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/01/22 02:14 linux-5.15.y 9eec9a14ee10 8fc37797 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/01/19 04:42 linux-5.15.y 68efe5a6c16a 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/01/18 00:36 linux-5.15.y 68efe5a6c16a 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2026/01/06 06:44 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2025/12/08 14:32 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2025/11/28 06:27 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2025/11/27 01:36 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2025/11/22 01:42 linux-5.15.y cc5ec8769306 4fb8ef37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2025/05/03 13:00 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in rose_transmit_link
2025/08/14 20:20 linux-5.15.y c79648372d02 5d8c2ac2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in rose_transmit_link
2025/11/27 09:34 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in rose_transmit_link
2025/11/27 01:31 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in rose_transmit_link
2025/05/30 10:26 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in rose_transmit_link
* Struck through repros no longer work on HEAD.