user/sven/linux.git/tools/objtool, branch v6.7.9

cred: get rid of CONFIG_DEBUG_CREDENTIALS

2023-12-15T22:19:48Z

This code is rarely (never?) enabled by distros, and it hasn't caught anything in decades. Let's kill off this legacy debug code. Suggested-by: Linus Torvalds Signed-off-by: Jens Axboe Signed-off-by: Linus Torvalds

Merge tag 'x86_tdx_for_6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-11-01T20:28:32Z

Pull x86 TDX updates from Dave Hansen: "The majority of this is a rework of the assembly and C wrappers that are used to talk to the TDX module and VMM. This is a nice cleanup in general but is also clearing the way for using this code when Linux is the TDX VMM. There are also some tidbits to make TDX guests play nicer with Hyper-V and to take advantage the hardware TSC. Summary: - Refactor and clean up TDX hypercall/module call infrastructure - Handle retrying/resuming page conversion hypercalls - Make sure to use the (shockingly) reliable TSC in TDX guests" [ TLA reminder: TDX is "Trust Domain Extensions", Intel's guest VM confidentiality technology ] * tag 'x86_tdx_for_6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/tdx: Mark TSC reliable x86/tdx: Fix __noreturn build warning around __tdx_hypercall_failed() x86/virt/tdx: Make TDX_MODULE_CALL handle SEAMCALL #UD and #GP x86/virt/tdx: Wire up basic SEAMCALL functions x86/tdx: Remove 'struct tdx_hypercall_args' x86/tdx: Reimplement __tdx_hypercall() using TDX_MODULE_CALL asm x86/tdx: Make TDX_HYPERCALL asm similar to TDX_MODULE_CALL x86/tdx: Extend TDX_MODULE_CALL to support more TDCALL/SEAMCALL leafs x86/tdx: Pass TDCALL/SEAMCALL input/output registers via a structure x86/tdx: Rename __tdx_module_call() to __tdcall() x86/tdx: Make macros of TDCALLs consistent with the spec x86/tdx: Skip saving output regs when SEAMCALL fails with VMFailInvalid x86/tdx: Zero out the missing RSI in TDX_HYPERCALL macro x86/tdx: Retry partially-completed page conversion hypercalls

Merge tag 'objtool-core-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-10-30T23:20:02Z

Pull objtool updates from Ingo Molnar: "Misc fixes and cleanups: - Fix potential MAX_NAME_LEN limit related build failures - Fix scripts/faddr2line symbol filtering bug - Fix scripts/faddr2line on LLVM=1 - Fix scripts/faddr2line to accept readelf output with mapping symbols - Minor cleanups" * tag 'objtool-core-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: scripts/faddr2line: Skip over mapping symbols in output from readelf scripts/faddr2line: Use LLVM addr2line and readelf if LLVM=1 scripts/faddr2line: Don't filter out non-function symbols from readelf objtool: Remove max symbol name length limitation objtool: Propagate early errors objtool: Use 'the fallthrough' pseudo-keyword x86/speculation, objtool: Use absolute relocations for annotations x86/unwind/orc: Remove redundant initialization of 'mid' pointer in __orc_find()

Merge tag 'x86_bugs_for_6.7_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-10-30T21:48:49Z

Pull x86 hw mitigation updates from Borislav Petkov: - A bunch of improvements, cleanups and fixlets to the SRSO mitigation machinery and other, general cleanups to the hw mitigations code, by Josh Poimboeuf - Improve the return thunk detection by objtool as it is absolutely important that the default return thunk is not used after returns have been patched. Future work to detect and report this better is pending - Other misc cleanups and fixes * tag 'x86_bugs_for_6.7_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits) x86/retpoline: Document some thunk handling aspects x86/retpoline: Make sure there are no unconverted return thunks due to KCSAN x86/callthunks: Delete unused "struct thunk_desc" x86/vdso: Run objtool on vdso32-setup.o objtool: Fix return thunk patching in retpolines x86/srso: Remove unnecessary semicolon x86/pti: Fix kernel warnings for pti= and nopti cmdline options x86/calldepth: Rename __x86_return_skl() to call_depth_return_thunk() x86/nospec: Refactor UNTRAIN_RET[_*] x86/rethunk: Use SYM_CODE_START[_LOCAL]_NOALIGN macros x86/srso: Disentangle rethunk-dependent options x86/srso: Move retbleed IBPB check into existing 'has_microcode' code block x86/bugs: Remove default case for fully switched enums x86/srso: Remove 'pred_cmd' label x86/srso: Unexport untraining functions x86/srso: Improve i-cache locality for alias mitigation x86/srso: Fix unret validation dependencies x86/srso: Fix vulnerability reporting for missing microcode x86/srso: Print mitigation for retbleed IBPB case x86/srso: Print actual mitigation if requested mitigation isn't possible ...

Merge tag 'bcachefs-2023-10-30' of https://evilpiepirate.org/git/bcachefs

2023-10-30T21:09:38Z

Pull initial bcachefs updates from Kent Overstreet: "Here's the bcachefs filesystem pull request. One new patch since last week: the exportfs constants ended up conflicting with other filesystems that are also getting added to the global enum, so switched to new constants picked by Amir. The only new non fs/bcachefs/ patch is the objtool patch that adds bcachefs functions to the list of noreturns. The patch that exports osq_lock() has been dropped for now, per Ingo" * tag 'bcachefs-2023-10-30' of https://evilpiepirate.org/git/bcachefs: (2781 commits) exportfs: Change bcachefs fid_type enum to avoid conflicts bcachefs: Refactor memcpy into direct assignment bcachefs: Fix drop_alloc_keys() bcachefs: snapshot_create_lock bcachefs: Fix snapshot skiplists during snapshot deletion bcachefs: bch2_sb_field_get() refactoring bcachefs: KEY_TYPE_error now counts towards i_sectors bcachefs: Fix handling of unknown bkey types bcachefs: Switch to unsafe_memcpy() in a few places bcachefs: Use struct_size() bcachefs: Correctly initialize new buckets on device resize bcachefs: Fix another smatch complaint bcachefs: Use strsep() in split_devs() bcachefs: Add iops fields to bch_member bcachefs: Rename bch_sb_field_members -> bch_sb_field_members_v1 bcachefs: New superblock section members_v2 bcachefs: Add new helper to retrieve bch_member from sb bcachefs: bucket_lock() is now a sleepable lock bcachefs: fix crc32c checksum merge byte order problem bcachefs: Fix bch2_inode_delete_keys() ...

objtool: Fix return thunk patching in retpolines

2023-10-20T10:51:41Z

With CONFIG_RETHUNK enabled, the compiler replaces every RET with a tail call to a return thunk ('JMP __x86_return_thunk'). Objtool annotates all such return sites so they can be patched during boot by apply_returns(). The implementation of __x86_return_thunk() is just a bare RET. It's only meant to be used temporarily until apply_returns() patches all return sites with either a JMP to another return thunk or an actual RET. Removing the .text..__x86.return_thunk section would break objtool's detection of return sites in retpolines. Since retpolines and return thunks would land in the same section, the compiler no longer uses relocations for the intra-section jumps between the retpolines and the return thunk, causing objtool to overlook them. As a result, none of the retpolines' return sites would get patched. Each one stays at 'JMP __x86_return_thunk', effectively a bare RET. Fix it by teaching objtool to detect when a non-relocated jump target is a return thunk (or retpoline). [ bp: Massage the commit message now that the offending commit removing the .text..__x86.return_thunk section has been zapped. Still keep the objtool change here as it makes objtool more robust wrt handling such intra-TU jumps without relocations, should some toolchain and/or config generate them in the future. ] Reported-by: David Kaplan Signed-off-by: Josh Poimboeuf Signed-off-by: Ingo Molnar Signed-off-by: Borislav Petkov (AMD) Acked-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20231012024737.eg5phclogp67ik6x@treble

objtool: Add bcachefs noreturns

2023-10-19T18:58:29Z

Signed-off-by: Kent Overstreet

objtool: Remove max symbol name length limitation

2023-10-06T00:01:28Z

If one of the symbols processed by read_symbols() happens to have a .cold variant with a name longer than objtool's MAX_NAME_LEN limit, the build fails. Avoid this problem by just using strndup() to copy the parent function's name, rather than strncpy()ing it onto the stack. Signed-off-by: Aaron Plattner Link: https://lore.kernel.org/r/41e94cfea1d9131b758dd637fecdeacd459d4584.1696355111.git.aplattner@nvidia.com Signed-off-by: Josh Poimboeuf

objtool: Propagate early errors

2023-10-06T00:01:11Z

If objtool runs into a problem that causes it to exit early, the overall tool still returns a status code of 0, which causes the build to continue as if nothing went wrong. Note this only affects early errors, as later errors are still ignored by check(). Fixes: b51277eb9775 ("objtool: Ditch subcommands") Signed-off-by: Aaron Plattner Link: https://lore.kernel.org/r/cb6a28832d24b2ebfafd26da9abb95f874c83045.1696355111.git.aplattner@nvidia.com Signed-off-by: Josh Poimboeuf

objtool: Use 'the fallthrough' pseudo-keyword

2023-10-03T19:37:35Z

Replace the existing /* fallthrough */ comments with the new 'fallthrough' pseudo-keyword macro: https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Ruan Jinjie Signed-off-by: Ingo Molnar Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: linux-kernel@vger.kernel.org