ci2 starts bisection 2023-12-25 05:00:43.399068743 +0000 UTC m=+220246.722954314 bisecting fixing commit since 48c6c901fe0e68e176029738d829e0d01eabb0b2 building syzkaller on d80eec66c939240cfc674221138f637197659116 ensuring issue is reproducible on original commit 48c6c901fe0e68e176029738d829e0d01eabb0b2 testing commit 48c6c901fe0e68e176029738d829e0d01eabb0b2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a7fd64eea806fa2a803ac033d7439887ee31025fcc87be0ddf12596a2c3adec3 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 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 __skb_datagram_iter 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 run #10: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #11: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #12: crashed: KASAN: use-after-free Read in unix_stream_read_actor run #13: crashed: KASAN: use-after-free Read in __skb_datagram_iter run #14: crashed: KASAN: use-after-free Read in __skb_datagram_iter 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 __skb_datagram_iter representative crash: KASAN: use-after-free Read in unix_stream_read_actor, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 48c6c901fe0e68e176029738d829e0d01eabb0b2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1713ad70dfca9a2adacbd2a494a45f9c6c88a2941f8a575a1ea3f93e1b2692c5 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 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 __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 bug reproduces without the instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG LOCKDEP], they are not needed kconfig minimization: base=5179 full=6485 leaves diff=250 split chunks (needed=false): <250> split chunk #0 of len 250 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 48c6c901fe0e68e176029738d829e0d01eabb0b2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b0523fa546bbd196f8e67f6b8ab7a4264f108be72c8e87084345c68f66fd34b2 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 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 __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 __skb_datagram_iter 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 [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 48c6c901fe0e68e176029738d829e0d01eabb0b2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4dab2173483cbaa2a8ac08f01cfb857c4777c0475634ddb5ed488c8ca40379b4 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 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 testing without sub-chunk 3/5 disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 48c6c901fe0e68e176029738d829e0d01eabb0b2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: df6a415bbca728c9e71c6ef88031f41173dc7c0221e490dab99e8cec17965a53 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 __skb_datagram_iter 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 unix_stream_read_actor, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 48c6c901fe0e68e176029738d829e0d01eabb0b2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 295f5bf704a45720d03a9e0f9bbe1eaae2e757f6ff2ef721139e9442bb518152 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 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 unix_stream_read_actor, 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 48c6c901fe0e68e176029738d829e0d01eabb0b2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 failed building 48c6c901fe0e68e176029738d829e0d01eabb0b2: net/socket.c:1225: undefined reference to `wext_handle_ioctl' net/socket.c:3420: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:329: undefined reference to `wext_proc_init' net/core/net-procfs.c:345: undefined reference to `wext_proc_exit' minimized to 50 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_MBIM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_PURELIFI WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_SILABS WLAN_VENDOR_ZYDAS X86_X32_ABI ZEROPLUS_FF] disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing current HEAD 401a2769d99066952f3bfb73a8ce6b0269bc04d7 testing commit 401a2769d99066952f3bfb73a8ce6b0269bc04d7 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 69190d581f5f93c6fb19e9f8945dda5628feed869faaa33ee5bcf93700a001b5 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 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] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 54m23.446927532s (build: 19m27.073275587s, test: 32m4.745444177s) crash still not fixed or there were kernel test errors commit msg: UPSTREAM: dm verity: don't perform FEC for failed readahead IO crash: KASAN: use-after-free Read in __skb_datagram_iter ================================================================== BUG: KASAN: use-after-free in skb_headlen include/linux/skbuff.h:2395 [inline] BUG: KASAN: use-after-free in __skb_datagram_iter+0x512/0x5b0 net/core/datagram.c:411 Read of size 4 at addr ffff888111227e30 by task syz-executor.0/606 CPU: 1 PID: 606 Comm: syz-executor.0 Not tainted 6.1.57-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x105/0x148 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350 skb_headlen include/linux/skbuff.h:2395 [inline] __skb_datagram_iter+0x512/0x5b0 net/core/datagram.c:411 skb_copy_datagram_iter+0x38/0x100 net/core/datagram.c:527 skb_copy_datagram_msg include/linux/skbuff.h:3931 [inline] unix_stream_read_actor+0x68/0xa0 net/unix/af_unix.c:2920 unix_stream_recv_urg+0x16a/0x2a0 net/unix/af_unix.c:2647 unix_stream_read_generic+0x1e29/0x1f10 net/unix/af_unix.c:2726 unix_stream_recvmsg+0x20c/0x2a0 net/unix/af_unix.c:2957 ____sys_recvmsg+0x263/0x450 ___sys_recvmsg+0x4c1/0x6e0 net/socket.c:2760 __sys_recvmsg net/socket.c:2790 [inline] __do_sys_recvmsg net/socket.c:2800 [inline] __se_sys_recvmsg net/socket.c:2797 [inline] __x64_sys_recvmsg+0x18d/0x210 net/socket.c:2797 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+0x63/0xcd RIP: 0033:0x7fb08bc7cae9 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:00007fb08c9b00c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007fb08bd9c120 RCX: 00007fb08bc7cae9 RDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007fb08bcc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fb08bd9c120 R15: 00007fff8c6989f8 Allocated by task 605: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:333 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook+0x59/0x270 mm/slab.h:768 slab_alloc_node mm/slub.c:3421 [inline] kmem_cache_alloc_node+0x18a/0x2d0 mm/slub.c:3466 __alloc_skb+0x12c/0x700 net/core/skbuff.c:505 alloc_skb include/linux/skbuff.h:1283 [inline] alloc_skb_with_frags+0x7f/0x520 net/core/skbuff.c:6153 sock_alloc_send_pskb+0x7ef/0x8f0 net/core/sock.c:2744 sock_alloc_send_skb include/net/sock.h:1921 [inline] queue_oob+0xfd/0x7e0 net/unix/af_unix.c:2114 unix_stream_sendmsg+0xb55/0xf50 net/unix/af_unix.c:2251 sock_sendmsg_nosec net/socket.c:716 [inline] __sock_sendmsg net/socket.c:728 [inline] ____sys_sendmsg+0x495/0x7c0 net/socket.c:2499 ___sys_sendmsg+0x223/0x2a0 net/socket.c:2553 __sys_sendmsg net/socket.c:2582 [inline] __do_sys_sendmsg net/socket.c:2591 [inline] __se_sys_sendmsg+0x143/0x1d0 net/socket.c:2589 __x64_sys_sendmsg+0x76/0x80 net/socket.c:2589 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+0x63/0xcd Freed by task 605: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249 kasan_slab_free include/linux/kasan.h:178 [inline] slab_free_hook mm/slub.c:1745 [inline] slab_free_freelist_hook mm/slub.c:1771 [inline] slab_free mm/slub.c:3684 [inline] kmem_cache_free+0x264/0x450 mm/slub.c:3706 kfree_skbmem+0xb6/0x110 __kfree_skb net/core/skbuff.c:871 [inline] consume_skb+0x86/0x180 net/core/skbuff.c:1035 queue_oob+0x497/0x7e0 net/unix/af_unix.c:2145 unix_stream_sendmsg+0xb55/0xf50 net/unix/af_unix.c:2251 sock_sendmsg_nosec net/socket.c:716 [inline] __sock_sendmsg net/socket.c:728 [inline] ____sys_sendmsg+0x495/0x7c0 net/socket.c:2499 ___sys_sendmsg+0x223/0x2a0 net/socket.c:2553 __sys_sendmsg net/socket.c:2582 [inline] __do_sys_sendmsg net/socket.c:2591 [inline] __se_sys_sendmsg+0x143/0x1d0 net/socket.c:2589 __x64_sys_sendmsg+0x76/0x80 net/socket.c:2589 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+0x63/0xcd The buggy address belongs to the object at ffff888111227dc0 which belongs to the cache skbuff_head_cache of size 248 The buggy address is located 112 bytes inside of 248-byte region [ffff888111227dc0, ffff888111227eb8) The buggy address belongs to the physical page: page:ffffea00044489c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x111227 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 ffffea0004486780 dead000000000005 ffff888100b75380 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 105, tgid 105 (udevadm), ts 3948899195, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook mm/page_alloc.c:2566 [inline] prep_new_page+0x512/0x5e0 mm/page_alloc.c:2573 get_page_from_freelist+0x288b/0x2910 mm/page_alloc.c:4397 __alloc_pages+0x39f/0x780 mm/page_alloc.c:5684 alloc_slab_page+0x6c/0xf0 allocate_slab mm/slub.c:1962 [inline] new_slab+0x7b/0x370 mm/slub.c:2015 ___slab_alloc+0x611/0x9a0 mm/slub.c:3203 __slab_alloc+0x52/0x90 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] kmem_cache_alloc_node+0x1c9/0x2d0 mm/slub.c:3466 __alloc_skb+0x12c/0x700 net/core/skbuff.c:505 alloc_skb include/linux/skbuff.h:1283 [inline] alloc_uevent_skb+0x78/0x220 lib/kobject_uevent.c:290 uevent_net_broadcast_untagged lib/kobject_uevent.c:326 [inline] kobject_uevent_net_broadcast+0x338/0x460 lib/kobject_uevent.c:409 kobject_uevent_env+0x3be/0x4f0 lib/kobject_uevent.c:593 kobject_synth_uevent+0x76e/0x900 lib/kobject_uevent.c:208 uevent_store+0x1a/0x50 drivers/base/core.c:2656 dev_attr_store+0x52/0x70 drivers/base/core.c:2358 sysfs_kf_write+0x101/0x120 fs/sysfs/file.c:136 page_owner free stack trace missing Memory state around the buggy address: ffff888111227d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc ffff888111227d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb >ffff888111227e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888111227e80: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ffff888111227f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================