Date: Wed, 31 Dec 2025 04:07:14 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 292032] armv7 on aarch64 (tested chroot, lib32) gets SIGSEGV for the likes of: gpart show [native armv7 kernel use contexts do not get any SIGSEGV's] Message-ID: <bug-292032-227-627Rd0SSgU@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-292032-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292032 --- Comment #6 from Mark Millard <marklmi26-fbsd@yahoo.com> --- Example low level failure information (chroot context): . . . 493 static void 494 delete_config(struct gconf *gp) 495 { 496 struct gconfig *cf; 497 498 for (;;) { 499 cf = LIST_FIRST(gp); 500 if (cf == NULL) 501 return; 502 LIST_REMOVE(cf, lg_config); 503 free(cf->lg_name); 504 free(cf->lg_val); 505 free(cf); 506 } 507 } 508 509 void 510 geom_deletetree(struct gmesh *gmp) 511 { 512 struct gclass *cl; 513 struct ggeom *ge; 514 struct gprovider *pr; 515 struct gconsumer *co; 516 517 free(gmp->lg_ident); 518 gmp->lg_ident = NULL; 519 for (;;) { 520 cl = LIST_FIRST(&gmp->lg_class); 521 if (cl == NULL) 522 break; 523 LIST_REMOVE(cl, lg_class); 524 delete_config(&cl->lg_config); . . . Context is line 524 and its use of delete_config . (gdb) info reg r6 r6 0x200891b8 537432504 (gdb) nexti Breakpoint 3.1, delete_config (gp=0x2053c1dc) at /usr/src/lib/libgeom/geom_xml2tree.c:502 502 LIST_REMOVE(cf, lg_config); => 0x200c5ee8 <geom_deletetree+84>: e1c600d0 ldrd r0, [r6] 0x200c5eec <geom_deletetree+88>: e3500000 cmp r0, #0 0x200c5ef0 <geom_deletetree+92>: 15801004 strne r1, [r0, #4] 0x200c5ef4 <geom_deletetree+96>: e5810000 str r0, [r1] (gdb) info reg r0 r0 0x2053c198 542359960 (gdb) nexti 0x200c5eec 502 LIST_REMOVE(cf, lg_config); => 0x200c5eec <geom_deletetree+88>: e3500000 cmp r0, #0 0x200c5ef0 <geom_deletetree+92>: 15801004 strne r1, [r0, #4] 0x200c5ef4 <geom_deletetree+96>: e5810000 str r0, [r1] (gdb) info reg r0 r0 0xffffffff 4294967295 The later execution of "strne r1, [r0, #4]" rejects using the 0xffffffff from r0: (gdb) nexti 0x200c5ef0 502 LIST_REMOVE(cf, lg_config); => 0x200c5ef0 <geom_deletetree+92>: 15801004 strne r1, [r0, #4] 0x200c5ef4 <geom_deletetree+96>: e5810000 str r0, [r1] (gdb) nexti Program received signal SIGSEGV, Segmentation fault. Address not mapped to object. 0x200c5ef0 in delete_config (gp=0x2053c1dc) at /usr/src/lib/libgeom/geom_xml2tree.c:502 502 LIST_REMOVE(cf, lg_config); => 0x200c5ef0 <geom_deletetree+92>: 15801004 strne r1, [r0, #4] 0x200c5ef4 <geom_deletetree+96>: e5810000 str r0, [r1] -- You are receiving this mail because: You are the assignee for the bug.home | help
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