bisecting fixing commit since 4039146777a91e1576da2bf38e0d8a1061a1ae47 building syzkaller on 6c236867ce33c0c16b102e02a08226d7eb9b2046 testing commit 4039146777a91e1576da2bf38e0d8a1061a1ae47 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: 2c05827b3fd09d91279c6215948afa103e5e936ca6bbe72d19a400d005dab714 run #0: crashed: WARNING: proc registration bug in clusterip_tg_check run #1: crashed: WARNING: proc registration bug in clusterip_tg_check run #2: crashed: WARNING: proc registration bug in clusterip_tg_check run #3: crashed: WARNING: proc registration bug in clusterip_tg_check run #4: crashed: WARNING: proc registration bug in clusterip_tg_check run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK reproducer seems to be flaky testing current HEAD b539c44df067ac116ec1b58b956efda51b6a7fc1 testing commit b539c44df067ac116ec1b58b956efda51b6a7fc1 arch/x86/kernel/setup.c:916:6: error: implicit declaration of function 'acpi_mps_check' [-Werror=implicit-function-declaration] arch/x86/kernel/setup.c:1110:2: error: implicit declaration of function 'acpi_table_upgrade' [-Werror=implicit-function-declaration] arch/x86/kernel/setup.c:1112:2: error: implicit declaration of function 'acpi_boot_table_init' [-Werror=implicit-function-declaration] arch/x86/kernel/setup.c:1120:2: error: implicit declaration of function 'early_acpi_boot_init'; did you mean 'early_cpu_init'? [-Werror=implicit-function-declaration] arch/x86/kernel/setup.c:1162:2: error: implicit declaration of function 'acpi_boot_init' [-Werror=implicit-function-declaration] Reproducer flagged being flaky revisions tested: 1, total time: 21m39.468617862s (build: 12m1.104673704s, test: 9m9.461498251s) bisection is inconclusive, the first good commit could be any of: 4039146777a91e1576da2bf38e0d8a1061a1ae47 b539c44df067ac116ec1b58b956efda51b6a7fc1