Hi folks. I use Fedora Rawhide and today's update came with the new kernel 5.7.0-0.rc0.git6.1. As it turned out this kernel won't boot. Instead, I see the black screen and some times see messages: exit_boot() failed! efi_main() failed! The last working kernel is kernel-core-5.7.0-0.rc0.git2.1 I looked at the spec file and found out that the last bootable kernel was related to the commit cad18da0afb1 (https://src.fedoraproject.org/rpms/kernel/c/9949db6070c6ca501d7235760ca8aba120db7448?branch=master), and the first non-bootable kernel related to the commit a10c9c710f9e (https://src.fedoraproject.org/rpms/kernel/c/0561e0bf0e459dd4b27a77670de838128b87bd0e?branch=master) Of course, knowing these two commits, I made bisecting with the vanilla kernel: $ git bisect log git bisect start # good: [cad18da0afb1bc7b37d73a74067ab7ff5974897c] Merge tag 'please-pull-ia64_for_5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux git bisect good cad18da0afb1bc7b37d73a74067ab7ff5974897c # bad: [a10c9c710f9ecea87b9f4bbb837467893b4bef01] Merge tag 'for-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply git bisect bad a10c9c710f9ecea87b9f4bbb837467893b4bef01 # bad: [f365ab31efacb70bed1e821f7435626e0b2528a6] Merge tag 'drm-next-2020-04-01' of git://anongit.freedesktop.org/drm/drm git bisect bad f365ab31efacb70bed1e821f7435626e0b2528a6 # good: [7f80ccfe996871ca69648efee74a60ae7ad0dcd9] net: ipv6: rpl_iptunnel: Fix potential memory leak in rpl_do_srh_inline git bisect good 7f80ccfe996871ca69648efee74a60ae7ad0dcd9 # good: [9001b17698d86f842e2b13e0cafe8021d43209e9] Merge tag 'drm-intel-next-2020-03-13' of git://anongit.freedesktop.org/drm/drm-intel into drm-next git bisect good 9001b17698d86f842e2b13e0cafe8021d43209e9 # bad: [dfabb077d62552797ca0ae7756cb30d3e195ead5] Merge tag 'mmc-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc git bisect bad dfabb077d62552797ca0ae7756cb30d3e195ead5 # bad: [15c981d16d70e8a5be297fa4af07a64ab7e080ed] Merge tag 'for-5.7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux git bisect bad 15c981d16d70e8a5be297fa4af07a64ab7e080ed # good: [dc9492c14c758639d7b2468d4ed3c77e785c1a35] btrfs: hold a ref on the root on the dead roots list git bisect good dc9492c14c758639d7b2468d4ed3c77e785c1a35 # good: [3cd86a58f7734bf9cef38f6f899608ebcaa3da13] Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux git bisect good 3cd86a58f7734bf9cef38f6f899608ebcaa3da13 # bad: [fdf5563a720004199324371c08071b8ea27bd994] Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip git bisect bad fdf5563a720004199324371c08071b8ea27bd994 # skip: [cf122cfba5b1d9daf64009d143f51dfec4b1705a] kill uaccess_try() git bisect skip cf122cfba5b1d9daf64009d143f51dfec4b1705a # skip: [4dd2a1b92b91b5f2acf853ee1dc0df135054698f] x86: Replace setup_irq() by request_irq() git bisect skip 4dd2a1b92b91b5f2acf853ee1dc0df135054698f # skip: [5c1f178094631e8b9acc67e4a9b6e03abfbc2529] x86: __setup_frame(): consolidate uaccess areas git bisect skip 5c1f178094631e8b9acc67e4a9b6e03abfbc2529 # skip: [3add42c29cebb1d5f83c6205c59466a06ccf8da1] x86: get rid of get_user_ex() in restore_sigcontext() git bisect skip 3add42c29cebb1d5f83c6205c59466a06ccf8da1 # skip: [ead8e4e7e2c75ced6fcd9a53d3e9a2ecd7368553] x86: __setup_rt_frame(): consolidate uaccess areas git bisect skip ead8e4e7e2c75ced6fcd9a53d3e9a2ecd7368553 # skip: [31a9122058bc5f042cb04bcdb8cd9e6c77fdae8d] x86/mm: Drop pud_mknotpresent() git bisect skip 31a9122058bc5f042cb04bcdb8cd9e6c77fdae8d # skip: [791612e9668cecbf5dd24d13400ac74e099f005c] x86: x32_setup_rt_frame(): consolidate uaccess areas git bisect skip 791612e9668cecbf5dd24d13400ac74e099f005c # skip: [77f3c6166ddc7567455b244074b3ebb63862b56f] x86: kill get_user_{try,catch,ex} git bisect skip 77f3c6166ddc7567455b244074b3ebb63862b56f # skip: [b00d8f8f0b2b39223c3fd6713d318aba95420264] x86: setup_sigcontext(): list user_access_{begin,end}() into callers git bisect skip b00d8f8f0b2b39223c3fd6713d318aba95420264 # skip: [0e79ad863df43b01090ae18c97de5c3787f069c6] x86/cpu: Fix a -Wmissing-prototypes warning for init_ia32_feat_ctl() git bisect skip 0e79ad863df43b01090ae18c97de5c3787f069c6 # skip: [b87df6594486626a9ae5944807307f2604cea3e2] x86: unsafe_put-style macro for sigmask git bisect skip b87df6594486626a9ae5944807307f2604cea3e2 # skip: [a37d01ead405e3aa14d72d284721fe46422b3b63] x86: switch save_v86_state() to unsafe_put_user() git bisect skip a37d01ead405e3aa14d72d284721fe46422b3b63 # skip: [119cd59fcfbe70fb3fcab4e64cd232bcc3807585] x86: get rid of put_user_try in __setup_rt_frame() (both 32bit and 64bit) git bisect skip 119cd59fcfbe70fb3fcab4e64cd232bcc3807585 # skip: [119cd59fcfbe70fb3fcab4e64cd232bcc3807585] x86: get rid of put_user_try in __setup_rt_frame() (both 32bit and 64bit) git bisect skip 119cd59fcfbe70fb3fcab4e64cd232bcc3807585 # bad: [9589351ccf47a85a75180a430627c16bc28da929] Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip git bisect bad 9589351ccf47a85a75180a430627c16bc28da929 # skip: [003602ad5516e59940de42e44c8d8033387bb363] x86/*/Makefile: Use -fno-asynchronous-unwind-tables to suppress .eh_frame sections git bisect skip 003602ad5516e59940de42e44c8d8033387bb363 # skip: [0eea39a234dc52063d14541fabcb2c64516a2328] x86/boot/compressed: Remove .eh_frame section from bzImage git bisect skip 0eea39a234dc52063d14541fabcb2c64516a2328 # skip: [bac59d18c7018a2fd5e800a1e72a8271bf404977] x86/setup: Fix static memory detection git bisect skip bac59d18c7018a2fd5e800a1e72a8271bf404977 # skip: [3ee372ccce4d4e7c610748d0583979d3ed3a0cf4] x86/boot/compressed/64: Remove .bss/.pgtable from bzImage git bisect skip 3ee372ccce4d4e7c610748d0583979d3ed3a0cf4 # skip: [a86255fe5258714e1f7c1bdfe95f08e4d098d450] x86/boot/compressed/64: Use 32-bit (zero-extended) MOV for z_output_len git bisect skip a86255fe5258714e1f7c1bdfe95f08e4d098d450 # skip: [6f8f0dc980028e98ae339876a8403edae4d20e39] x86/vmlinux: Drop unneeded linker script discard of .eh_frame git bisect skip 6f8f0dc980028e98ae339876a8403edae4d20e39 # skip: [48bfdb9deffdc6b683feb25e15f4f26aac503501] x86/boot/compressed/64: Use LEA to initialize boot stack pointer git bisect skip 48bfdb9deffdc6b683feb25e15f4f26aac503501 # skip: [c90beea22a2bece4b0bbb39789bf835504421594] x86/boot/compressed: Fix debug_puthex() parameter type git bisect skip c90beea22a2bece4b0bbb39789bf835504421594 # only skipped commits left to test # possible first bad commit: [9589351ccf47a85a75180a430627c16bc28da929] Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip # possible first bad commit: [c90beea22a2bece4b0bbb39789bf835504421594] x86/boot/compressed: Fix debug_puthex() parameter type # possible first bad commit: [bac59d18c7018a2fd5e800a1e72a8271bf404977] x86/setup: Fix static memory detection # possible first bad commit: [6f8f0dc980028e98ae339876a8403edae4d20e39] x86/vmlinux: Drop unneeded linker script discard of .eh_frame # possible first bad commit: [003602ad5516e59940de42e44c8d8033387bb363] x86/*/Makefile: Use -fno-asynchronous-unwind-tables to suppress .eh_frame sections # possible first bad commit: [0eea39a234dc52063d14541fabcb2c64516a2328] x86/boot/compressed: Remove .eh_frame section from bzImage # possible first bad commit: [3ee372ccce4d4e7c610748d0583979d3ed3a0cf4] x86/boot/compressed/64: Remove .bss/.pgtable from bzImage # possible first bad commit: [a86255fe5258714e1f7c1bdfe95f08e4d098d450] x86/boot/compressed/64: Use 32-bit (zero-extended) MOV for z_output_len # possible first bad commit: [48bfdb9deffdc6b683feb25e15f4f26aac503501] x86/boot/compressed/64: Use LEA to initialize boot stack pointer Unfortunately, kernel bisecting not telling exactly which commit is blame. In my bisecting a lot of skipping commits because of the unsuccessful builds: ld: arch/x86/boot/compressed/pgtable_64.o:(.bss+0x0): multiple definition of `__force_order'; arch/x86/boot/compressed/kaslr_64.o:(.bss+0x0): first defined here make[2]: *** [arch/x86/boot/compressed/Makefile:120: arch/x86/boot/compressed/vmlinux] Error 1 make[1]: *** [arch/x86/boot/Makefile:114: arch/x86/boot/compressed/vmlinux] Error 2 make: *** [arch/x86/Makefile:283: bzImage] Error 2 Can anyone here help me with this issue? Thanks. Downstream bugreport: https://bugzilla.redhat.com/show_bug.cgi?id=1822731 -- Best Regards, Mike Gavrilov.
