Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | KASAN: slab-use-after-free Read in hci_conn_hash_flush bluetooth | C | error | 3511 | 617d | 711d | 22/28 | fixed on 2023/07/01 16:05 |
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Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | KASAN: slab-use-after-free Read in hci_conn_hash_flush bluetooth | C | error | 3511 | 617d | 711d | 22/28 | fixed on 2023/07/01 16:05 |
================================================================== BUG: KASAN: use-after-free in hci_conn_unlink net/bluetooth/hci_conn.c:1084 [inline] BUG: KASAN: use-after-free in hci_conn_hash_flush+0x238/0x330 net/bluetooth/hci_conn.c:2509 Write of size 8 at addr ffff0000cd72aac8 by task syz.2.399/7898 CPU: 0 PID: 7898 Comm: syz.2.399 Not tainted 6.1.125-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:427 kasan_report+0xd4/0x130 mm/kasan/report.c:531 __asan_report_store8_noabort+0x2c/0x38 mm/kasan/report_generic.c:356 hci_conn_unlink net/bluetooth/hci_conn.c:1084 [inline] hci_conn_hash_flush+0x238/0x330 net/bluetooth/hci_conn.c:2509 hci_dev_close_sync+0x7e0/0xf1c net/bluetooth/hci_sync.c:5178 hci_dev_do_close net/bluetooth/hci_core.c:509 [inline] hci_unregister_dev+0x200/0x4c4 net/bluetooth/hci_core.c:2706 vhci_release+0x7c/0xcc drivers/bluetooth/hci_vhci.c:573 __fput+0x1c8/0x7c8 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x240/0x2f0 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x550/0x1a84 kernel/exit.c:871 do_group_exit+0x194/0x22c kernel/exit.c:1021 get_signal+0x14a0/0x158c kernel/signal.c:2871 do_signal arch/arm64/kernel/signal.c:1076 [inline] do_notify_resume+0x388/0x2cb8 arch/arm64/kernel/signal.c:1129 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 6977: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace+0x7c/0x94 mm/slab_common.c:1031 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] hci_conn_add+0xcc/0x10ac net/bluetooth/hci_conn.c:989 hci_connect_sco+0x94/0x378 net/bluetooth/hci_conn.c:1629 sco_connect net/bluetooth/sco.c:280 [inline] sco_sock_connect+0x25c/0x7e8 net/bluetooth/sco.c:616 __sys_connect_file net/socket.c:2011 [inline] __sys_connect+0x268/0x290 net/socket.c:2028 __do_sys_connect net/socket.c:2038 [inline] __se_sys_connect net/socket.c:2035 [inline] __arm64_sys_connect+0x7c/0x94 net/socket.c:2035 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Freed by task 7898: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x2c0/0x4b4 mm/slub.c:3674 kfree+0xcc/0x1b8 mm/slab_common.c:988 bt_link_release+0x20/0x30 net/bluetooth/hci_sysfs.c:14 device_release+0x8c/0x1ac kobject_cleanup lib/kobject.c:681 [inline] kobject_release lib/kobject.c:712 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x2a8/0x41c lib/kobject.c:729 put_device+0x28/0x40 drivers/base/core.c:3804 hci_conn_del_sysfs+0x7c/0x154 net/bluetooth/hci_sysfs.c:60 hci_conn_cleanup+0x4dc/0x69c net/bluetooth/hci_conn.c:172 hci_conn_del+0x3cc/0x5a8 net/bluetooth/hci_conn.c:1151 hci_conn_hash_flush+0x260/0x330 net/bluetooth/hci_conn.c:2510 hci_dev_close_sync+0x7e0/0xf1c net/bluetooth/hci_sync.c:5178 hci_dev_do_close net/bluetooth/hci_core.c:509 [inline] hci_unregister_dev+0x200/0x4c4 net/bluetooth/hci_core.c:2706 vhci_release+0x7c/0xcc drivers/bluetooth/hci_vhci.c:573 __fput+0x1c8/0x7c8 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x240/0x2f0 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x550/0x1a84 kernel/exit.c:871 do_group_exit+0x194/0x22c kernel/exit.c:1021 get_signal+0x14a0/0x158c kernel/signal.c:2871 do_signal arch/arm64/kernel/signal.c:1076 [inline] do_notify_resume+0x388/0x2cb8 arch/arm64/kernel/signal.c:1129 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000cd72a000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2760 bytes inside of 4096-byte region [ffff0000cd72a000, ffff0000cd72b000) The buggy address belongs to the physical page: page:000000000d1eefe1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10d728 head:000000000d1eefe1 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000001 ffff0000c0002a80 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000cd72a980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000cd72aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000cd72aa80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000cd72ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000cd72ab80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/01/19 00:35 | linux-6.1.y | 60ceadf9247e | f2cb035c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan-arm64 | KASAN: use-after-free Write in hci_conn_hash_flush |