Date: Tue, 20 Jul 2021 07:10:26 GMT From: Dmitry Chagin <dchagin@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 5fd9cd53d256 - main - linux(4): Modify sv_onexec hook to return an error. Message-ID: <202107200710.16K7AQZS030284@gitrepo.freebsd.org>
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The branch main has been updated by dchagin: URL: https://cgit.FreeBSD.org/src/commit/?id=5fd9cd53d256e08c601548c425bfcb3472f2d09b commit 5fd9cd53d256e08c601548c425bfcb3472f2d09b Author: Dmitry Chagin <dchagin@FreeBSD.org> AuthorDate: 2021-07-20 06:56:25 +0000 Commit: Dmitry Chagin <dchagin@FreeBSD.org> CommitDate: 2021-07-20 06:56:25 +0000 linux(4): Modify sv_onexec hook to return an error. Temporary add stubs to the Linux emulation layer which calls the existing hook. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D30911 MFC after: 2 weeks --- sys/amd64/linux/linux_sysvec.c | 12 +++++++++++- sys/amd64/linux32/linux32_sysvec.c | 12 +++++++++++- sys/arm64/linux/linux_sysvec.c | 12 +++++++++++- sys/i386/linux/linux_sysvec.c | 14 ++++++++++++-- sys/kern/kern_exec.c | 4 +--- sys/sys/sysent.h | 2 +- 6 files changed, 47 insertions(+), 9 deletions(-) diff --git a/sys/amd64/linux/linux_sysvec.c b/sys/amd64/linux/linux_sysvec.c index 566af6de29e7..2d3406582a33 100644 --- a/sys/amd64/linux/linux_sysvec.c +++ b/sys/amd64/linux/linux_sysvec.c @@ -106,6 +106,8 @@ static void linux_set_syscall_retval(struct thread *td, int error); static int linux_fetch_syscall_args(struct thread *td); static void linux_exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack); +static int linux_on_exec_vmspace(struct proc *p, + struct image_params *imgp); static int linux_vsyscall(struct thread *td); #define LINUX_T_UNKNOWN 255 @@ -766,12 +768,20 @@ struct sysentvec elf_linux_sysvec = { .sv_schedtail = linux_schedtail, .sv_thread_detach = linux_thread_detach, .sv_trap = linux_vsyscall, - .sv_onexec = linux_on_exec, + .sv_onexec = linux_on_exec_vmspace, .sv_onexit = linux_on_exit, .sv_ontdexit = linux_thread_dtor, .sv_setid_allowed = &linux_setid_allowed_query, }; +static int +linux_on_exec_vmspace(struct proc *p, struct image_params *imgp) +{ + + linux_on_exec(p, imgp); + return (0); +} + static void linux_vdso_install(void *param) { diff --git a/sys/amd64/linux32/linux32_sysvec.c b/sys/amd64/linux32/linux32_sysvec.c index 7dfd57a74a1e..90b6207a50c9 100644 --- a/sys/amd64/linux32/linux32_sysvec.c +++ b/sys/amd64/linux32/linux32_sysvec.c @@ -111,6 +111,8 @@ static int linux_copyout_strings(struct image_params *imgp, static void linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask); static void linux_exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack); +static int linux_on_exec_vmspace(struct proc *p, + struct image_params *imgp); static void linux32_fixlimit(struct rlimit *rl, int which); static bool linux32_trans_osrel(const Elf_Note *note, int32_t *osrel); static void linux_vdso_install(void *param); @@ -938,12 +940,20 @@ struct sysentvec elf_linux_sysvec = { .sv_schedtail = linux_schedtail, .sv_thread_detach = linux_thread_detach, .sv_trap = NULL, - .sv_onexec = linux_on_exec, + .sv_onexec = linux_on_exec_vmspace, .sv_onexit = linux_on_exit, .sv_ontdexit = linux_thread_dtor, .sv_setid_allowed = &linux_setid_allowed_query, }; +static int +linux_on_exec_vmspace(struct proc *p, struct image_params *imgp) +{ + + linux_on_exec(p, imgp); + return (0); +} + static void linux_vdso_install(void *param) { diff --git a/sys/arm64/linux/linux_sysvec.c b/sys/arm64/linux/linux_sysvec.c index e684fb604889..706b97894f9c 100644 --- a/sys/arm64/linux/linux_sysvec.c +++ b/sys/arm64/linux/linux_sysvec.c @@ -86,6 +86,8 @@ static void linux_set_syscall_retval(struct thread *td, int error); static int linux_fetch_syscall_args(struct thread *td); static void linux_exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack); +static int linux_on_exec_vmspace(struct proc *p, + struct image_params *imgp); /* DTrace init */ LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE); @@ -433,12 +435,20 @@ struct sysentvec elf_linux_sysvec = { .sv_trap = NULL, .sv_hwcap = &elf_hwcap, .sv_hwcap2 = &elf_hwcap2, - .sv_onexec = linux_on_exec, + .sv_onexec = linux_on_exec_vmspace, .sv_onexit = linux_on_exit, .sv_ontdexit = linux_thread_dtor, .sv_setid_allowed = &linux_setid_allowed_query, }; +static int +linux_on_exec_vmspace(struct proc *p, struct image_params *imgp) +{ + + linux_on_exec(p, imgp); + return (0); +} + static void linux_vdso_install(const void *param) { diff --git a/sys/i386/linux/linux_sysvec.c b/sys/i386/linux/linux_sysvec.c index a0959d55b585..048bc6dffdca 100644 --- a/sys/i386/linux/linux_sysvec.c +++ b/sys/i386/linux/linux_sysvec.c @@ -94,6 +94,8 @@ static int linux_fixup_elf(uintptr_t *stack_base, static void linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask); static void linux_exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack); +static int linux_on_exec_vmspace(struct proc *p, + struct image_params *imgp); static int linux_copyout_strings(struct image_params *imgp, uintptr_t *stack_base); static bool linux_trans_osrel(const Elf_Note *note, int32_t *osrel); @@ -838,7 +840,7 @@ struct sysentvec linux_sysvec = { .sv_schedtail = linux_schedtail, .sv_thread_detach = linux_thread_detach, .sv_trap = NULL, - .sv_onexec = linux_on_exec, + .sv_onexec = linux_on_exec_vmspace, .sv_onexit = linux_on_exit, .sv_ontdexit = linux_thread_dtor, .sv_setid_allowed = &linux_setid_allowed_query, @@ -880,12 +882,20 @@ struct sysentvec elf_linux_sysvec = { .sv_schedtail = linux_schedtail, .sv_thread_detach = linux_thread_detach, .sv_trap = NULL, - .sv_onexec = linux_on_exec, + .sv_onexec = linux_on_exec_vmspace, .sv_onexit = linux_on_exit, .sv_ontdexit = linux_thread_dtor, .sv_setid_allowed = &linux_setid_allowed_query, }; +static int +linux_on_exec_vmspace(struct proc *p, struct image_params *imgp) +{ + + linux_on_exec(p, imgp); + return (0); +} + static void linux_vdso_install(void *param) { diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c index eff48b2c86f3..e5944bfc5ac6 100644 --- a/sys/kern/kern_exec.c +++ b/sys/kern/kern_exec.c @@ -1163,9 +1163,7 @@ exec_new_vmspace(struct image_params *imgp, struct sysentvec *sv) vmspace->vm_ssize = sgrowsiz >> PAGE_SHIFT; vmspace->vm_maxsaddr = (char *)stack_addr; - if (sv->sv_onexec != NULL) - sv->sv_onexec(p, imgp); - return (0); + return (sv->sv_onexec != NULL ? sv->sv_onexec(p, imgp) : 0); } /* diff --git a/sys/sys/sysent.h b/sys/sys/sysent.h index f0bb084d59dc..1b43e9692153 100644 --- a/sys/sys/sysent.h +++ b/sys/sys/sysent.h @@ -151,7 +151,7 @@ struct sysentvec { const char *(*sv_machine_arch)(struct proc *); vm_offset_t sv_fxrng_gen_base; void (*sv_onexec_old)(struct thread *td); - void (*sv_onexec)(struct proc *, struct image_params *); + int (*sv_onexec)(struct proc *, struct image_params *); void (*sv_onexit)(struct proc *); void (*sv_ontdexit)(struct thread *td); int (*sv_setid_allowed)(struct thread *td,
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