Greeting, FYI, we noticed the following commit (built with gcc-9): commit: cf8d0e3e583cba8e7eb935f9b97ac94d84fccc2d ("[PATCH] sctp: Fix sk_buff leak when receiving a datagram") url: https://github.com/0day-ci/linux/commits/Xiyu-Yang/sctp-Fix-sk_buff-leak-when-receiving-a-datagram/20200613-204024 in testcase: ltp with following parameters: test: net.sctp test-description: The LTP testsuite contains a collection of tools for testing the Linux kernel and related features. test-url: http://linux-test-project.github.io/ on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +---------------------------------------------------+------------+------------+ | | df2fbf5bfa | cf8d0e3e58 | +---------------------------------------------------+------------+------------+ | boot_successes | 0 | 0 | | boot_failures | 2 | 4 | | WARNING:at_fs/fuse/file.c:#tree_insert[fuse] | 2 | | | RIP:tree_insert[fuse] | 2 | | | WARNING:at_net/ipv4/af_inet.c:#inet_sock_destruct | 0 | 4 | | RIP:inet_sock_destruct | 0 | 4 | | RIP:native_safe_halt | 0 | 4 | +---------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 52.179668] WARNING: CPU: 1 PID: 2325 at net/ipv4/af_inet.c:154 inet_sock_destruct+0x199/0x1c0 [ 52.181864] Modules linked in: sctp libcrc32c loop sr_mod cdrom sg intel_rapl_msr ppdev bochs_drm drm_vram_helper drm_ttm_helper ttm intel_rapl_common ata_generic drm_kms_helper crct10dif_pclmul crc32_pclmul pata_acpi crc32c_intel ghash_clmulni_intel snd_pcm syscopyarea aesni_intel sysfillrect sysimgblt fb_sys_fops snd_timer crypto_simd cryptd glue_helper snd ata_piix drm soundcore joydev pcspkr serio_raw libata i2c_piix4 parport_pc parport floppy ip_tables [ 52.192094] CPU: 1 PID: 2325 Comm: test_1_to_1_add Not tainted 5.7.0-14529-gcf8d0e3e583cb #1 [ 52.194497] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.197030] RIP: 0010:inet_sock_destruct+0x199/0x1c0 [ 52.199047] Code: 00 00 5b 41 5c e9 87 ca f3 ff 41 0f b6 44 24 12 3c 07 74 8f e9 24 09 00 00 4c 89 e7 e8 40 42 f1 ff e9 71 ff ff ff 0f 0b eb b6 <0f> 0b 41 8b 84 24 4c 01 00 00 85 c0 74 90 0f 0b 41 8b 94 24 48 01 [ 52.204322] RSP: 0018:ffffab6340317d40 EFLAGS: 00010202 [ 52.206435] RAX: 00000000000000ef RBX: ffff9f1fdffa21b0 RCX: 0000000000000020 [ 52.208868] RDX: 0000000000000201 RSI: 0000000000000f11 RDI: ffff9f1fdffa21b0 [ 52.211132] RBP: ffff9f1fdffa2100 R08: ffff9f1fdffa224c R09: 0000000000000000 [ 52.213435] R10: ffff9f1fe329c700 R11: 0000000000000001 R12: ffff9f1fdffa2100 [ 52.215899] R13: ffff9f1fdffa2188 R14: ffff9f1fdffa2180 R15: ffff9f2005d7d380 [ 52.218327] FS: 0000000000000000(0000) GS:ffff9f20bfd00000(0000) knlGS:0000000000000000 [ 52.220970] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.223361] CR2: 00007f39626d5f10 CR3: 00000003a240a000 CR4: 00000000000406e0 [ 52.225886] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.228452] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.230985] Call Trace: [ 52.232898] __sk_destruct+0x26/0x1e0 [ 52.235011] sctp_close+0x23a/0x320 [sctp] [ 52.237248] inet_release+0x34/0x60 [ 52.239411] __sock_release+0x3d/0xa0 [ 52.241422] sock_close+0x11/0x20 [ 52.243362] __fput+0xf5/0x260 [ 52.245211] task_work_run+0x6f/0xc0 [ 52.247257] do_exit+0x391/0xbb0 [ 52.249135] do_group_exit+0x3a/0xb0 [ 52.251083] __x64_sys_exit_group+0x14/0x20 [ 52.253066] do_syscall_64+0x5b/0x1f0 [ 52.254856] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 52.257101] RIP: 0033:0x7f39626d5618 [ 52.259140] Code: Bad RIP value. [ 52.261631] RSP: 002b:00007ffff5ead788 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 52.264092] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f39626d5618 [ 52.266446] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 52.268925] RBP: 00007f39629b28e0 R08: 00000000000000e7 R09: ffffffffffffff98 [ 52.271434] R10: 00007f3962bd4260 R11: 0000000000000246 R12: 00007f39629b28e0 [ 52.273912] R13: 00007f39629b7c20 R14: 0000000000000000 R15: 0000000000000000 [ 52.276446] ---[ end trace 64f4aa61e173f4fb ]--- To reproduce: # build kernel cd linux cp config-5.7.0-14529-gcf8d0e3e583cb .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 INSTALL_MOD_PATH= modules_install cd find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k -m modules.cgz job-script # job-script is attached in this email Thanks, lkp