ci2 starts bisection 2023-11-15 04:46:44.662104271 +0000 UTC m=+124271.770135014 bisecting fixing commit since fb2635ac69abac0060cc2be2873dc4f524f12e66 building syzkaller on d80eec66c939240cfc674221138f637197659116 ensuring issue is reproducible on original commit fb2635ac69abac0060cc2be2873dc4f524f12e66 testing commit fb2635ac69abac0060cc2be2873dc4f524f12e66 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b05473b0df172b245079a84f6886e6ed38b63a25c352c492711c3922dce64b28 run #0: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #1: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #2: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #3: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #4: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #5: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #6: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #7: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #8: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #9: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #10: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #11: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #12: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #13: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #14: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #15: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #16: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #17: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #18: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #19: crashed: KASAN: use-after-free Read in unix_stream_read_actor representative crash: KASAN: use-after-free Read in unix_stream_read_actor, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit fb2635ac69abac0060cc2be2873dc4f524f12e66 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c5afc12c664f4abfc02cda7ad10b7723cefd07711c8670639c51ecd9f693c679 run #0: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #1: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #2: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #3: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #4: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #5: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #6: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #7: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #8: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #9: crashed: KASAN: use-after-free Read in unix_stream_read_actor representative crash: KASAN: use-after-free Read in __skb_datagram_iter, types: [KASAN] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed kconfig minimization: base=3820 full=7526 leaves diff=1996 split chunks (needed=false): <1996> split chunk #0 of len 1996 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit fb2635ac69abac0060cc2be2873dc4f524f12e66 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b1e33162fc8caa095cbe7d55620c38d6fb0ed5287ca662fed1400a16ca2a4679 run #0: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #1: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #2: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #3: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #4: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #5: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #6: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #7: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #8: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #9: crashed: KASAN: use-after-free Read in unix_stream_read_actor representative crash: KASAN: use-after-free Read in unix_stream_read_actor, types: [KASAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit fb2635ac69abac0060cc2be2873dc4f524f12e66 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3f5461278592e508ea296d9376a321d088f5ceb8cc5186283de1ba72db441bd9 run #0: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #1: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #2: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #3: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #4: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #5: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #6: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #7: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #8: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #9: crashed: KASAN: use-after-free Read in unix_stream_read_actor representative crash: KASAN: use-after-free Read in __skb_datagram_iter, types: [KASAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit fb2635ac69abac0060cc2be2873dc4f524f12e66 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ca979f2db9b6ede8ab7e4c2c386bf64a41232bc27307e71152dddc4d7d072615 run #0: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #1: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #2: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #3: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #4: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #5: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #6: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #7: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #8: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #9: crashed: KASAN: use-after-free Read in __skb_datagram_iter representative crash: KASAN: use-after-free Read in __skb_datagram_iter, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit fb2635ac69abac0060cc2be2873dc4f524f12e66 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 79233fb6ae88f2bcc2624b12385132450bd3e6bf0f4c7db07f6330ea6f952ee7 run #0: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #1: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #2: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #3: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #4: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #5: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #6: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #7: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #8: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #9: crashed: KASAN: use-after-free Read in unix_stream_read_actor representative crash: KASAN: use-after-free Read in __skb_datagram_iter, types: [KASAN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit fb2635ac69abac0060cc2be2873dc4f524f12e66 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ae2d595adad9fba992269ba4a6e42519872f0f5427026f483bba2776b13544ac run #0: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #1: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #2: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #3: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #4: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #5: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #6: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #7: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #8: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #9: crashed: KASAN: use-after-free Read in __skb_datagram_iter representative crash: KASAN: use-after-free Read in __skb_datagram_iter, types: [KASAN] the chunk can be dropped disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG LOCKDEP], they are not needed determining the merge base between fb2635ac69abac0060cc2be2873dc4f524f12e66 and 86d11b0e20c09e0a91cd2aa57b115000274e2ac5 830b3c68c1fb1e9176028d02ef86f3cf76aa2476/Linux 6.1 is a merge base, check if it has the bug testing commit 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 85a569ea3ca3e80dc5aae319ccf10c90a53fb5d23b54ba8c8dd877d1907e94a0 run #0: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #1: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #2: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #3: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #4: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #5: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #6: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #7: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #8: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #9: crashed: KASAN: use-after-free Read in unix_stream_read_actor representative crash: KASAN: use-after-free Read in unix_stream_read_actor, types: [KASAN] testing current HEAD 86d11b0e20c09e0a91cd2aa57b115000274e2ac5 testing commit 86d11b0e20c09e0a91cd2aa57b115000274e2ac5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2e4a081b8b3b8f55271a485aac5ba44d857660d191e4712f7c326a75c7164202 run #0: crashed: KASAN: slab-use-after-free Read in unix_stream_read_actor run #1: crashed: KASAN: slab-use-after-free Read in unix_stream_read_actor run #2: crashed: KASAN: slab-use-after-free Read in __skb_datagram_iter run #3: crashed: KASAN: slab-use-after-free Read in __skb_datagram_iter run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: KASAN: slab-use-after-free Read in unix_stream_read_actor, types: [KASAN] crash still not fixed/happens on the oldest tested release reproducer is flaky (1.00 repro chance estimate) revisions tested: 9, total time: 2h18m40.63946071s (build: 1h4m29.321186538s, test: 1h10m33.095217711s) crash still not fixed or there were kernel test errors commit msg: Merge tag 'zstd-linus-v6.7-rc2' of https://github.com/terrelln/linux crash: KASAN: slab-use-after-free Read in unix_stream_read_actor ================================================================== BUG: KASAN: slab-use-after-free in unix_stream_read_actor+0x8c/0x90 net/unix/af_unix.c:2866 Read of size 4 at addr ffff88810478e404 by task syz-executor.0/2207 CPU: 1 PID: 2207 Comm: syz-executor.0 Not tainted 6.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xf4/0x260 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x15f/0x540 mm/kasan/report.c:475 kasan_report+0x13e/0x170 mm/kasan/report.c:588 unix_stream_read_actor+0x8c/0x90 net/unix/af_unix.c:2866 unix_stream_recv_urg+0x16c/0x2a0 net/unix/af_unix.c:2587 unix_stream_read_generic+0x1dbc/0x1ec0 net/unix/af_unix.c:2666 unix_stream_recvmsg+0x161/0x1e0 net/unix/af_unix.c:2903 sock_recvmsg_nosec net/socket.c:1044 [inline] sock_recvmsg net/socket.c:1066 [inline] ____sys_recvmsg+0x26f/0x4e0 net/socket.c:2803 ___sys_recvmsg+0x4c1/0x6e0 net/socket.c:2845 __sys_recvmsg net/socket.c:2875 [inline] __do_sys_recvmsg net/socket.c:2885 [inline] __se_sys_recvmsg net/socket.c:2882 [inline] __x64_sys_recvmsg+0x190/0x210 net/socket.c:2882 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0xe0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fb88031eae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007fb87fe5f0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007fb88043e120 RCX: 00007fb88031eae9 RDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007fb88036a47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fb88043e120 R15: 00007ffca73cf858 Allocated by task 2206: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x62/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x67/0x3a0 mm/slab.h:763 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x194/0x330 mm/slub.c:3523 __alloc_skb+0x1e0/0x8a0 net/core/skbuff.c:641 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0x85/0x570 net/core/skbuff.c:6331 sock_alloc_send_pskb+0x7ef/0x8f0 net/core/sock.c:2780 sock_alloc_send_skb include/net/sock.h:1884 [inline] queue_oob+0xfd/0x7e0 net/unix/af_unix.c:2147 unix_stream_sendmsg+0xd2d/0x1210 net/unix/af_unix.c:2301 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x4a4/0x770 net/socket.c:2584 ___sys_sendmsg+0x223/0x2a0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg+0x146/0x1d0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0xe0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Freed by task 2206: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x24/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0x122/0x1e0 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] kmem_cache_free+0x2e8/0x4f0 mm/slub.c:3831 queue_oob+0x497/0x7e0 net/unix/af_unix.c:2178 unix_stream_sendmsg+0xd2d/0x1210 net/unix/af_unix.c:2301 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x4a4/0x770 net/socket.c:2584 ___sys_sendmsg+0x223/0x2a0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg+0x146/0x1d0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0xe0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff88810478e3c0 which belongs to the cache skbuff_head_cache of size 224 The buggy address is located 68 bytes inside of freed 224-byte region [ffff88810478e3c0, ffff88810478e4a0) The buggy address belongs to the physical page: page:ffffea000411e380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10478e memcg:ffff888115869081 flags: 0x200000000000800(slab|node=0|zone=2) page_type: 0xffffffff() raw: 0200000000000800 ffff888104271640 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000c000c 00000001ffffffff ffff888115869081 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 2206, tgid 2204 (syz-executor.0), ts 67328801029, free_ts 67320386266 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x256/0x280 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1544 [inline] get_page_from_freelist+0x32b9/0x3680 mm/page_alloc.c:3312 __alloc_pages+0x251/0x640 mm/page_alloc.c:4568 alloc_pages_mpol+0x13f/0x320 mm/mempolicy.c:2133 alloc_slab_page+0x6a/0x150 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x70/0x250 mm/slub.c:2070 ___slab_alloc+0x932/0xeb0 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] kmem_cache_alloc_node+0x21e/0x330 mm/slub.c:3523 __alloc_skb+0x1e0/0x8a0 net/core/skbuff.c:641 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0x85/0x570 net/core/skbuff.c:6331 sock_alloc_send_pskb+0x7ef/0x8f0 net/core/sock.c:2780 sock_alloc_send_skb include/net/sock.h:1884 [inline] queue_oob+0xfd/0x7e0 net/unix/af_unix.c:2147 unix_stream_sendmsg+0xd2d/0x1210 net/unix/af_unix.c:2301 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x4a4/0x770 net/socket.c:2584 ___sys_sendmsg+0x223/0x2a0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg+0x146/0x1d0 net/socket.c:2674 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1137 [inline] free_unref_page_prepare+0x7c0/0x8d0 mm/page_alloc.c:2347 free_unref_page+0x30/0x230 mm/page_alloc.c:2487 vfree+0x10a/0x200 mm/vmalloc.c:2842 delayed_vfree_work+0x38/0x60 mm/vmalloc.c:2763 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x7e2/0xfc0 kernel/workqueue.c:2703 worker_thread+0x864/0xc90 kernel/workqueue.c:2784 kthread+0x22f/0x280 kernel/kthread.c:388 ret_from_fork+0x2a/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Memory state around the buggy address: ffff88810478e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88810478e380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb >ffff88810478e400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88810478e480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff88810478e500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================