Date: Mon, 11 Mar 2019 15:57:32 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 236466] [sendfile]: panic when VOP_READ returns an error Message-ID: <bug-236466-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236466 Bug ID: 236466 Summary: [sendfile]: panic when VOP_READ returns an error Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: asomers@FreeBSD.org sendfile will panic if it can't read the pages it wants to send. This panic is easily reproducible using FUSE. I've seen the error when the fuse filesystem returns either EOPNOTSUP or EIO for its read, but presumably it can happen with any sort of read error. FreeBSD fbsd12.lauralan.noip.me 13.0-CURRENT FreeBSD 13.0-CURRENT #3 r344740:344786M: Tue Mar 5 10:37:58 MST 2019 somers@fbsd12.lauralan.noip.me:/usr/obj/usr/home/somers/freebsd/base/projects/fuse2/amd64.amd64/sys/GENERIC amd64 panic: sendfile_swapin: pager fail obj 0xfffff800343f6300 page 0xfffff800b9a93430 cpuid = 3 time = 1552317254 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0031fc15d0 vpanic() at vpanic+0x1b4/frame 0xfffffe0031fc1630 panic() at panic+0x43/frame 0xfffffe0031fc1690 vn_sendfile() at vn_sendfile+0x1619/frame 0xfffffe0031fc1900 sendfile() at sendfile+0x12b/frame 0xfffffe0031fc1990 amd64_syscall() at amd64_syscall+0x276/frame 0xfffffe0031fc1ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0031fc1ab0 --- syscall (393, FreeBSD ELF64, sys_sendfile), rip = 0x8005077da, rsp = 0x7fffffffe6e8, rbp = 0x7fffffffe840 --- KDB: enter: panic I'll commit a reproduction case shortly. -- You are receiving this mail because: You are the assignee for the bug.help
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