On Mon, Sep 03, 2018 at 01:40:16PM -0400, Shawn Webb wrote: > I'm unsure whether this is a false positive or true positive, but it > looks like there may be a buffer overflow in swapoff_one: > > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] REDZONE: Buffer overflow > detected. 16 bytes corrupted after 0xfffffe1fe0023248 (2237000 bytes > allocated). > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] Allocation backtrace: > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #0 0xffffffff80e188e1 at > redzone_setup+0xe1 > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #1 0xffffffff80ac8007 at > malloc+0x1d7 > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #2 0xffffffff80b1f449 at > blist_create+0x99 > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #3 0xffffffff80e1daa7 at > swaponsomething+0xe7 > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #4 0xffffffff80e1c233 at > sys_swapon+0x413 > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #5 0xffffffff80fc0e5e at > amd64_syscall+0x29e > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #6 0xffffffff80f9dc9d at > fast_syscall_common+0x101 > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] Free backtrace: > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #0 0xffffffff80e18c28 at > redzone_check+0x2f8 > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #1 0xffffffff80ac85af at > free_dbg+0x5f > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #2 0xffffffff80ac84aa at > free+0x1a > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #3 0xffffffff80e1cae5 at > swapoff_one+0x675 > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #4 0xffffffff80e1cc57 at > swapoff_all+0xd7 > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #5 0xffffffff80b9991a at > bufshutdown+0x2ca > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #6 0xffffffff80aec36e at > kern_reboot+0x21e > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #7 0xffffffff80aec0f9 at > sys_reboot+0x3a9 > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #8 0xffffffff80fc0e5e at > amd64_syscall+0x29e > Sep 3 13:13:13 hbsd-dev-laptop kernel: [619] #9 0xffffffff80f9dc9d at > fast_syscall_common+0x101 > > Of course, I'm running HardenedBSD 12-CURRENT/amd64. I've synced with > FreeBSD at this commit: > https://github.com/freebsd/freebsd/commit/2f2449cc1cdfc19ae34b2317e792af489418a01a > > So my src tree is at this commit: > https://github.com/HardenedBSD/hardenedBSD/commit/98f90fadab000b818a731be4650ac1a47144501c > > I've not yet studied the swap pager's code and plan to start learning > it soon.
See PR 231116. _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
