Date: Fri, 14 Apr 2023 15:24:13 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 270841] fstat causes kernel panic with NFS Message-ID: <bug-270841-227-Jv5vGYBmcJ@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-270841-227@https.bugs.freebsd.org/bugzilla/> References: <bug-270841-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D270841 --- Comment #1 from Henry Hu <henry.hu.sh@gmail.com> --- It seems like that I'm speaking too soon. After removing the nullfs mounts = from NFS mount, I can still trigger kernel panic: Unread portion of the kernel message buffer: Fatal double fault rip 0xffffffff80b2ed6c rsp 0xfffffe015b561000 rbp 0xfffffe015b561020 rax 0xffffffff80f242d8 rdx 0xfffff8010459f262 rbx 0xfffff8000cad5900 rcx 0x42 rsi 0xfffff8000cad5900 rdi 0 r8 0xffffffff811c2888 r9 0 r10 0xfffffe015b561074 r11 0 r12 0 r13 0x42 r14 0xfffff8010459f262 r15 0 rflags 0x10246 cs 0x20 ss 0x28 ds 0x3b es 0x3b fs 0x13 gs 0x1b fsbase 0x1b8e37c8a140 gsbase 0xffffffff83011000 kgsbase 0 cpuid =3D 1; apic id =3D 01 panic: double fault cpuid =3D 1 time =3D 1681485595 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe003c1c5= da0 vpanic() at vpanic+0x185/frame 0xfffffe003c1c5e00 panic() at panic+0x43/frame 0xfffffe003c1c5e60 dblfault_handler() at dblfault_handler+0x1ce/frame 0xfffffe003c1c5f20 Xdblfault() at Xdblfault+0xd7/frame 0xfffffe003c1c5f20 --- trap 0x17, rip =3D 0xffffffff80b2ed6c, rsp =3D 0xfffffe015b561000, rbp = =3D 0xfffffe015b561020 --- bounce_bus_dmamap_load_buffer() at bounce_bus_dmamap_load_buffer+0xc/frame 0xfffffe015b561020 bus_dmamap_load() at bus_dmamap_load+0x86/frame 0xfffffe015b5610a0 WritePacket() at WritePacket+0xd3/frame 0xfffffe015b5610f0 re_start() at re_start+0x7b1/frame 0xfffffe015b5631a0 if_transmit_default() at if_transmit_default+0xf5/frame 0xfffffe015b5631f0 ether_output_frame() at ether_output_frame+0xa3/frame 0xfffffe015b563220 ether_output() at ether_output+0x6bd/frame 0xfffffe015b5632a0 ip_output_send() at ip_output_send+0xa4/frame 0xfffffe015b5632d0 ip_output() at ip_output+0x1222/frame 0xfffffe015b5633e0 tcp_default_output() at tcp_default_output+0x1f60/frame 0xfffffe015b5635c0 tcp_usr_send() at tcp_usr_send+0x27b/frame 0xfffffe015b563670 sosend_generic() at sosend_generic+0x605/frame 0xfffffe015b563740 sosend() at sosend+0x3b/frame 0xfffffe015b563770 clnt_vc_call() at clnt_vc_call+0x511/frame 0xfffffe015b5638d0 clnt_reconnect_call() at clnt_reconnect_call+0x2e8/frame 0xfffffe015b563990 newnfs_request() at newnfs_request+0xa96/frame 0xfffffe015b563b40 nfscl_request() at nfscl_request+0x54/frame 0xfffffe015b563b90 nfsrpc_accessrpc() at nfsrpc_accessrpc+0x11a/frame 0xfffffe015b563d30 nfs34_access_otw() at nfs34_access_otw+0x43/frame 0xfffffe015b563e60 nfs_access() at nfs_access+0x3d5/frame 0xfffffe015b563ef0 vop_sigdefer() at vop_sigdefer+0x2b/frame 0xfffffe015b563f20 vn_dir_check_exec() at vn_dir_check_exec+0x4e/frame 0xfffffe015b563f60 nfs_lookup() at nfs_lookup+0x127/frame 0xfffffe015b564280 vop_sigdefer() at vop_sigdefer+0x2b/frame 0xfffffe015b5642b0 vfs_lookup() at vfs_lookup+0x44c/frame 0xfffffe015b564350 namei() at namei+0x1ff/frame 0xfffffe015b5643d0 vn_open_cred() at vn_open_cred+0x565/frame 0xfffffe015b564530 vop_stdvptocnp() at vop_stdvptocnp+0x1b4/frame 0xfffffe015b5647e0 vop_sigdefer() at vop_sigdefer+0x2b/frame 0xfffffe015b564810 vn_vptocnp() at vn_vptocnp+0x199/frame 0xfffffe015b564880 vn_fullpath_dir() at vn_fullpath_dir+0xf9/frame 0xfffffe015b5648f0 vn_fullpath_any() at vn_fullpath_any+0x55/frame 0xfffffe015b564930 vn_fullpath() at vn_fullpath+0xd2/frame 0xfffffe015b564980 vn_fill_kinfo_vnode() at vn_fill_kinfo_vnode+0x42/frame 0xfffffe015b564a90 vn_fill_kinfo() at vn_fill_kinfo+0x45/frame 0xfffffe015b564ac0 kern_proc_filedesc_out() at kern_proc_filedesc_out+0x4b8/frame 0xfffffe015b564b50 sysctl_kern_proc_filedesc() at sysctl_kern_proc_filedesc+0x8c/frame 0xfffffe015b564bd0 sysctl_root_handler_locked() at sysctl_root_handler_locked+0x90/frame 0xfffffe015b564c20 sysctl_root() at sysctl_root+0x28a/frame 0xfffffe015b564ca0 userland_sysctl() at userland_sysctl+0x17e/frame 0xfffffe015b564d50 sys___sysctl() at sys___sysctl+0x5c/frame 0xfffffe015b564e00 amd64_syscall() at amd64_syscall+0x11a/frame 0xfffffe015b564f30 fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe015b564f30 --- syscall (202, FreeBSD ELF64, __sysctl), rip =3D 0x76b1013278a, rsp =3D 0x76b0e6e5388, rbp =3D 0x76b0e6e53c0 --- Uptime: 10m58s Dumping 2214 out of 32486 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..= 91% __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:59 59 __asm("movq %%gs:%P1,%0" : "=3Dr" (td) : "n" (offsetof(stru= ct pcpu, (kgdb) where #0 __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:59 #1 dump_savectx () at /usr/src/sys/kern/kern_shutdown.c:403 #2 0xffffffff807a64b8 in dumpsys (di=3D0x0) at /usr/src/sys/x86/include/dump.h:87 #3 doadump (textdump=3D1) at /usr/src/sys/kern/kern_shutdown.c:432 #4 kern_reboot (howto=3D260) at /usr/src/sys/kern/kern_shutdown.c:539 #5 0xffffffff807a6a23 in vpanic (fmt=3D0xffffffff80bc0f3f "double fault", ap=3D0xfffffe003c1c5e40) at /usr/src/sys/kern/kern_shutdown.c:983 #6 0xffffffff807a6823 in panic (fmt=3D<unavailable>) at /usr/src/sys/kern/kern_shutdown.c:907 #7 0xffffffff80b6d83e in dblfault_handler (frame=3D<optimized out>) at /usr/src/sys/amd64/amd64/trap.c:1014 #8 <signal handler called> #9 0xffffffff80b2ed6c in bounce_bus_dmamap_load_buffer (dmat=3D0xfffff8000cad5900, map=3D0x0, buf=3D0xfffff8010459f262, buflen=3D6= 6, pmap=3D0xffffffff811c2888 <kernel_pmap_store>, flags=3D0, segs=3D<optimized= out>, segp=3D0xfffffe015b561074) at /usr/src/sys/x86/x86/busdma_bounce.c:736 #10 0xffffffff807e99c6 in _bus_dmamap_load_buffer (dmat=3D0xfffff8000cad590= 0, map=3D0x0, buf=3D0xfffff8010459f262, buflen=3D66, flags=3D0, segs=3D0x0, segp=3D0xfffffe015b561074, pmap=3D<optimized out>) at /usr/src/sys/x86/include/bus_dma.h:168 #11 bus_dmamap_load (dmat=3D0xfffff8000cad5900, map=3D0x0, buf=3D0xfffff801= 0459f262, buflen=3D66, callback=3D0xffffffff88857b60 <WritePacket+560>, callback_arg=3D0xfffff800182ee280, flags=3D0) at /usr/src/sys/kern/subr_bus_dma.c:461 #12 0xffffffff888579d3 in WritePacket () from /boot/modules/if_re.ko #13 0xa5a5a5a500000000 in ?? () #14 0xa5a5a5a5a5a5a5a5 in ?? () #15 0xa000004200000028 in ?? () #16 0xfffff800182ee280 in ?? () #17 0x0000000060000000 in ?? () #18 0x0000004200000001 in ?? () #19 0xfffff8010459f262 in ?? () #20 0xfffffe01527f5000 in ?? () #21 0xfffffe015b5631a0 in ?? () #22 0xffffffff8882c621 in re_start () from /boot/modules/if_re.ko #23 0x0000000000000000 in ?? () (kgdb) fram e9 No symbol "e9" in current context. (kgdb) frame 9 #9 0xffffffff80b2ed6c in bounce_bus_dmamap_load_buffer (dmat=3D0xfffff8000cad5900, map=3D0x0, buf=3D0xfffff8010459f262, buflen=3D6= 6, pmap=3D0xffffffff811c2888 <kernel_pmap_store>, flags=3D0, segs=3D<optimized= out>, segp=3D0xfffffe015b561074) at /usr/src/sys/x86/x86/busdma_bounce.c:736 736 { (kgdb) l 731 */ 732 static int 733 bounce_bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf, 734 bus_size_t buflen, pmap_t pmap, int flags, bus_dma_segment_t *s= egs, 735 int *segp) 736 { 737 bus_size_t sgsize, max_sgsize; 738 vm_paddr_t curaddr; 739 vm_offset_t kvaddr, vaddr; 740 int error; (kgdb) --=20 You are receiving this mail because: You are the assignee for the bug.=
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