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KASAN: use-after-free Read in siw_query_port (2)

Status: upstream: reported on 2023/12/13 22:42
Reported-by: syzbot+15a94a0531011bda93cc@syzkaller.appspotmail.com
First crash: 851d, last: 11d
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: slab-use-after-free Read in siw_query_port rdma 19 50 951d 1067d 0/29 auto-obsoleted due to no activity on 2023/11/13 22:18
linux-6.1 KASAN: use-after-free Read in siw_query_port 19 5 906d 983d 0/3 auto-obsoleted due to no activity on 2024/01/27 18:37
linux-5.15 KASAN: use-after-free Read in siw_query_port 19 3 996d 1023d 0/3 auto-obsoleted due to no activity on 2023/10/29 16:51
linux-6.1 KASAN: use-after-free Read in siw_query_port (2) origin:lts-only 19 syz inconclusive 410 13d 793d 0/3 upstream: reported syz repro on 2024/02/09 22:01
upstream KASAN: slab-use-after-free Read in siw_query_port (2) rdma 19 syz error inconclusive 2 488d 502d 0/29 auto-obsoleted due to no activity on 2025/04/27 10:54

Sample crash report:
wlan1 speed is unknown, defaulting to 1000
==================================================================
BUG: KASAN: use-after-free in siw_query_port+0x358/0x450 drivers/infiniband/sw/siw/siw_verbs.c:175
Read of size 4 at addr ffff88805fb180d8 by task kworker/0:1/13

CPU: 0 PID: 13 Comm: kworker/0:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: infiniband ib_cache_event_task
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 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
 siw_query_port+0x358/0x450 drivers/infiniband/sw/siw/siw_verbs.c:175
 ib_cache_update+0x1bf/0x9c0 drivers/infiniband/core/cache.c:1484
 ib_cache_event_task+0xdc/0x1d0 drivers/infiniband/core/cache.c:1558
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

The buggy address belongs to the page:
page:ffffea00017ec600 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5fb18
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea00015cc108 ffffea000097cc08 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x102800(GFP_NOWAIT|__GFP_NOWARN|__GFP_HARDWALL), pid 144, ts 81058773726, free_ts 81058779021
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
 stack_depot_save+0x342/0x440 lib/stackdepot.c:302
 kasan_save_stack+0x4b/0x60 mm/kasan/common.c:40
 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348
 __call_rcu kernel/rcu/tree.c:3011 [inline]
 call_rcu+0x189/0x950 kernel/rcu/tree.c:3091
 destroy_inode fs/inode.c:316 [inline]
 evict+0x834/0x8d0 fs/inode.c:662
 __dentry_kill+0x431/0x650 fs/dcache.c:586
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xd8/0x1a0 fs/dcache.c:893
 debugfs_remove+0x52/0x70 fs/debugfs/inode.c:745
 wiphy_unregister+0x2de/0xa60 net/wireless/core.c:1086
 ieee80211_unregister_hw+0x141/0x220 net/mac80211/main.c:1418
 mac80211_hwsim_del_radio+0x282/0x470 drivers/net/wireless/mac80211_hwsim.c:3473
 hwsim_exit_net+0x589/0x650 drivers/net/wireless/mac80211_hwsim.c:4243
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x706/0xba0 net/core/net_namespace.c:635
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+0x637/0x6c0 mm/page_alloc.c:3317
 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396
 stack_depot_save+0x418/0x440 lib/stackdepot.c:335
 kasan_save_stack+0x4b/0x60 mm/kasan/common.c:40
 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348
 __call_rcu kernel/rcu/tree.c:3011 [inline]
 call_rcu+0x189/0x950 kernel/rcu/tree.c:3091
 destroy_inode fs/inode.c:316 [inline]
 evict+0x834/0x8d0 fs/inode.c:662
 __dentry_kill+0x431/0x650 fs/dcache.c:586
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xd8/0x1a0 fs/dcache.c:893
 debugfs_remove+0x52/0x70 fs/debugfs/inode.c:745
 wiphy_unregister+0x2de/0xa60 net/wireless/core.c:1086
 ieee80211_unregister_hw+0x141/0x220 net/mac80211/main.c:1418
 mac80211_hwsim_del_radio+0x282/0x470 drivers/net/wireless/mac80211_hwsim.c:3473
 hwsim_exit_net+0x589/0x650 drivers/net/wireless/mac80211_hwsim.c:4243
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x706/0xba0 net/core/net_namespace.c:635

Memory state around the buggy address:
 ffff88805fb17f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805fb18000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88805fb18080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                    ^
 ffff88805fb18100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88805fb18180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================

Crashes (109):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/01 20:16 linux-5.15.y 91d48252ad4b 9a1f7828 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2026/03/23 07:49 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 siw_query_port
2026/03/09 13:52 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 siw_query_port
2026/03/03 22:22 linux-5.15.y 3330a8d33e08 4180d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2026/02/25 15:05 linux-5.15.y 3330a8d33e08 94a9671e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2026/02/21 09:40 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2026/02/21 01:01 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2026/02/18 21:09 linux-5.15.y e45d5d41c134 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2026/02/05 04:31 linux-5.15.y 9eec9a14ee10 ea10c935 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2026/02/04 20:42 linux-5.15.y 9eec9a14ee10 ea10c935 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2026/01/30 03:58 linux-5.15.y 9eec9a14ee10 bfa73b7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2026/01/26 15:36 linux-5.15.y 9eec9a14ee10 a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2026/01/26 10:29 linux-5.15.y 9eec9a14ee10 a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/12/25 09:13 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 siw_query_port
2025/11/05 14:14 linux-5.15.y cc5ec8769306 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/11/02 20:49 linux-5.15.y cc5ec8769306 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/11/01 13:21 linux-5.15.y cc5ec8769306 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/11/01 06:20 linux-5.15.y cc5ec8769306 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/10/23 23:48 linux-5.15.y ac56c046adf4 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/10/18 19:26 linux-5.15.y 29e53a5b1c4f 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/10/11 22:50 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/10/11 00:30 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/10/10 18:42 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/10/01 15:19 linux-5.15.y 43bb85222e53 a1859138 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/08/25 08:11 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/08/12 01:38 linux-5.15.y c79648372d02 c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/08/07 03:01 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/07/30 20:23 linux-5.15.y c79648372d02 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/07/17 04:32 linux-5.15.y 89950c454265 44f8051e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/07/05 15:49 linux-5.15.y 3dea0e7f549e 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/06/11 12:52 linux-5.15.y 1c700860e8bc 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/05/30 11:09 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/05/19 15:50 linux-5.15.y a68c15152131 b84f0537 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/05/15 07:41 linux-5.15.y 3b8db0e4f263 d6b2ee52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/05/01 23:58 linux-5.15.y f7347f400572 51b137cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/04/08 13:50 linux-5.15.y 0c935c049b5c a775275d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/04/06 01:30 linux-5.15.y 0c935c049b5c 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/04/05 12:09 linux-5.15.y 0c935c049b5c c53ea9c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/02/20 16:32 linux-5.15.y c16c81c81336 50668798 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/02/14 05:24 linux-5.15.y c16c81c81336 d9a046cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/01/19 05:27 linux-5.15.y 4735586da88e f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2024/12/25 22:50 linux-5.15.y 91786f140358 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2024/12/21 00:00 linux-5.15.y 91786f140358 d7f584ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2024/12/11 06:32 linux-5.15.y 0a51d2d4527b cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2024/11/17 12:18 linux-5.15.y d98fd109f827 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2024/11/17 11:04 linux-5.15.y d98fd109f827 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2024/11/17 02:06 linux-5.15.y d98fd109f827 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2023/12/13 22:41 linux-5.15.y d0fc081c6241 3222d10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in siw_query_port
2025/07/23 14:46 linux-5.15.y c79648372d02 e1dd4f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in siw_query_port
2025/04/03 09:31 linux-5.15.y 0c935c049b5c 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in siw_query_port
2025/01/29 15:26 linux-5.15.y 003148680b79 136953f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in siw_query_port
2025/01/24 12:35 linux-5.15.y 003148680b79 521b0ce3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in siw_query_port
* Struck through repros no longer work on HEAD.