ci2 starts bisection 2023-05-02 19:28:51.638541679 +0000 UTC m=+35191.584463659 bisecting fixing commit since 115472395b0a9ea522ba0e106d6dfd7a73df8ba6 building syzkaller on fbf0499acc828df26995835e51d83c3a0117e716 ensuring issue is reproducible on original commit 115472395b0a9ea522ba0e106d6dfd7a73df8ba6 testing commit 115472395b0a9ea522ba0e106d6dfd7a73df8ba6 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 9045695e87ab7d7c39b7916b0402e2e9ce9cd60e1615794e1b09c63a9c331cd6 all runs: crashed: KASAN: slab-out-of-bounds Read in hci_le_meta_evt testing current HEAD 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: dfc5ce5b9f8a9fe92123e014eac29db48633e4677f24603843a33ef7773582fd all runs: crashed: KASAN: slab-out-of-bounds Read in hci_le_meta_evt revisions tested: 2, total time: 52m47.928925924s (build: 44m45.330763333s, test: 7m6.531612975s) the crash still happens on HEAD commit msg: Linux 5.15.110 crash: KASAN: slab-out-of-bounds Read in hci_le_meta_evt Bluetooth: hci0: Unknown advertising packet type: 0x6678 ================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5895 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x1541/0x3bb0 net/bluetooth/hci_event.c:6165 Read of size 1 at addr ffff88801aa86c0a by task kworker/u5:1/3506 CPU: 1 PID: 3506 Comm: kworker/u5:1 Not tainted 5.15.110-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Workqueue: hci0 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x163/0x213 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 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5895 [inline] hci_le_meta_evt+0x1541/0x3bb0 net/bluetooth/hci_event.c:6165 hci_event_packet+0x5eb/0x1390 net/bluetooth/hci_event.c:6482 hci_rx_work+0x1f6/0x6e0 net/bluetooth/hci_core.c:5153 process_one_work+0x799/0xe10 kernel/workqueue.c:2306 worker_thread+0x8f2/0xfb0 kernel/workqueue.c:2453 kthread+0x3a8/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Allocated by task 3957: 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+0xba/0xf0 mm/kasan/common.c:513 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc_node_track_caller+0x195/0x390 mm/slub.c:4963 kmalloc_reserve net/core/skbuff.c:356 [inline] __alloc_skb+0xbd/0x4a0 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1167 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:391 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:167 [inline] vhci_write+0xa2/0x3b0 drivers/bluetooth/hci_vhci.c:287 call_write_iter include/linux/fs.h:2103 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x84c/0xb50 fs/read_write.c:594 ksys_write+0x165/0x250 fs/read_write.c:647 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 Last potentially related work creation: kasan_save_stack+0x36/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:2993 [inline] call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3073 process_one_work+0x799/0xe10 kernel/workqueue.c:2306 worker_thread+0x8f2/0xfb0 kernel/workqueue.c:2453 kthread+0x3a8/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff88801aa86800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 10 bytes to the right of 1024-byte region [ffff88801aa86800, ffff88801aa86c00) The buggy address belongs to the page: page:ffffea00006aa000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aa80 head:ffffea00006aa000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001cf1200 0000000400000004 ffff888010841dc0 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 4964385086, free_ts 0 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_page_interleave+0xf/0x140 mm/mempolicy.c:2031 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] slab_alloc mm/slub.c:3228 [inline] __kmalloc+0x1c9/0x300 mm/slub.c:4403 kmalloc include/linux/slab.h:596 [inline] kzalloc include/linux/slab.h:721 [inline] alloc_workqueue+0x122/0x1190 kernel/workqueue.c:4322 nvme_core_init+0x39/0x1e4 drivers/nvme/host/core.c:4749 do_one_initcall+0x1a3/0x580 init/main.c:1306 do_initcall_level+0x125/0x1ae init/main.c:1379 do_initcalls+0x46/0x74 init/main.c:1395 kernel_init_freeable+0x38b/0x4dd init/main.c:1619 kernel_init+0x14/0x190 init/main.c:1510 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 page_owner free stack trace missing Memory state around the buggy address: ffff88801aa86b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801aa86b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88801aa86c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801aa86c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801aa86d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================