diff options
| author | kp <kp@FreeBSD.org> | 2018-04-14 00:12:16 +0000 |
|---|---|---|
| committer | kp <kp@FreeBSD.org> | 2018-04-14 00:12:16 +0000 |
| commit | c1f168558f11248664f7322288522e2c94481540 (patch) | |
| tree | 8b4f0a048d23921dca1381567908c180ad0fd774 | |
| parent | 40ca54dc9821cf2e781e74473f497d62bfd61f71 (diff) | |
| download | FreeBSD-src-c1f168558f11248664f7322288522e2c94481540.zip FreeBSD-src-c1f168558f11248664f7322288522e2c94481540.tar.gz | |
MFC r332142:
pf: Improve ioctl validation
Ensure that multiplications for memory allocations cannot overflow, and
that we'll not try to allocate M_WAITOK for potentially overly large
allocations.
| -rw-r--r-- | sys/netpfil/pf/pf_ioctl.c | 73 |
1 files changed, 63 insertions, 10 deletions
diff --git a/sys/netpfil/pf/pf_ioctl.c b/sys/netpfil/pf/pf_ioctl.c index d1b211c..ec57472 100644 --- a/sys/netpfil/pf/pf_ioctl.c +++ b/sys/netpfil/pf/pf_ioctl.c @@ -2733,9 +2733,14 @@ DIOCCHANGEADDR_error: error = ENODEV; break; } + if (io->pfrio_size < 0 || + WOULD_OVERFLOW(io->pfrio_size, sizeof(struct pfr_addr))) { + error = EINVAL; + break; + } totlen = io->pfrio_size * sizeof(struct pfr_addr); pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), - M_TEMP, M_WAITOK); + M_TEMP, M_NOWAIT); if (! pfras) { error = ENOMEM; break; @@ -2765,9 +2770,14 @@ DIOCCHANGEADDR_error: error = ENODEV; break; } + if (io->pfrio_size < 0 || + WOULD_OVERFLOW(io->pfrio_size, sizeof(struct pfr_addr))) { + error = EINVAL; + break; + } totlen = io->pfrio_size * sizeof(struct pfr_addr); pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), - M_TEMP, M_WAITOK); + M_TEMP, M_NOWAIT); if (! pfras) { error = ENOMEM; break; @@ -2797,10 +2807,18 @@ DIOCCHANGEADDR_error: error = ENODEV; break; } + if (io->pfrio_size < 0 || io->pfrio_size2 < 0) { + error = EINVAL; + break; + } count = max(io->pfrio_size, io->pfrio_size2); + if (WOULD_OVERFLOW(count, sizeof(struct pfr_addr))) { + error = EINVAL; + break; + } totlen = count * sizeof(struct pfr_addr); pfras = mallocarray(count, sizeof(struct pfr_addr), M_TEMP, - M_WAITOK); + M_NOWAIT); if (! pfras) { error = ENOMEM; break; @@ -2831,9 +2849,14 @@ DIOCCHANGEADDR_error: error = ENODEV; break; } + if (io->pfrio_size < 0 || + WOULD_OVERFLOW(io->pfrio_size, sizeof(struct pfr_addr))) { + error = EINVAL; + break; + } totlen = io->pfrio_size * sizeof(struct pfr_addr); pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), - M_TEMP, M_WAITOK); + M_TEMP, M_NOWAIT); if (! pfras) { error = ENOMEM; break; @@ -2857,9 +2880,14 @@ DIOCCHANGEADDR_error: error = ENODEV; break; } + if (io->pfrio_size < 0 || + WOULD_OVERFLOW(io->pfrio_size, sizeof(struct pfr_astats))) { + error = EINVAL; + break; + } totlen = io->pfrio_size * sizeof(struct pfr_astats); pfrastats = mallocarray(io->pfrio_size, - sizeof(struct pfr_astats), M_TEMP, M_WAITOK); + sizeof(struct pfr_astats), M_TEMP, M_NOWAIT); if (! pfrastats) { error = ENOMEM; break; @@ -2883,9 +2911,14 @@ DIOCCHANGEADDR_error: error = ENODEV; break; } + if (io->pfrio_size < 0 || + WOULD_OVERFLOW(io->pfrio_size, sizeof(struct pfr_addr))) { + error = EINVAL; + break; + } totlen = io->pfrio_size * sizeof(struct pfr_addr); pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), - M_TEMP, M_WAITOK); + M_TEMP, M_NOWAIT); if (! pfras) { error = ENOMEM; break; @@ -2915,9 +2948,14 @@ DIOCCHANGEADDR_error: error = ENODEV; break; } + if (io->pfrio_size < 0 || + WOULD_OVERFLOW(io->pfrio_size, sizeof(struct pfr_addr))) { + error = EINVAL; + break; + } totlen = io->pfrio_size * sizeof(struct pfr_addr); pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), - M_TEMP, M_WAITOK); + M_TEMP, M_NOWAIT); if (! pfras) { error = ENOMEM; break; @@ -2947,9 +2985,14 @@ DIOCCHANGEADDR_error: error = ENODEV; break; } + if (io->pfrio_size < 0 || + WOULD_OVERFLOW(io->pfrio_size, sizeof(struct pfr_addr))) { + error = EINVAL; + break; + } totlen = io->pfrio_size * sizeof(struct pfr_addr); pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), - M_TEMP, M_WAITOK); + M_TEMP, M_NOWAIT); if (! pfras) { error = ENOMEM; break; @@ -2994,9 +3037,14 @@ DIOCCHANGEADDR_error: error = ENODEV; break; } + if (io->size < 0 || + WOULD_OVERFLOW(io->size, sizeof(struct pfioc_trans_e))) { + error = EINVAL; + break; + } totlen = sizeof(struct pfioc_trans_e) * io->size; ioes = mallocarray(io->size, sizeof(struct pfioc_trans_e), - M_TEMP, M_WAITOK); + M_TEMP, M_NOWAIT); if (! ioes) { error = ENOMEM; break; @@ -3065,9 +3113,14 @@ DIOCCHANGEADDR_error: error = ENODEV; break; } + if (io->size < 0 || + WOULD_OVERFLOW(io->size, sizeof(struct pfioc_trans_e))) { + error = EINVAL; + break; + } totlen = sizeof(struct pfioc_trans_e) * io->size; ioes = mallocarray(io->size, sizeof(struct pfioc_trans_e), - M_TEMP, M_WAITOK); + M_TEMP, M_NOWAIT); if (! ioes) { error = ENOMEM; break; |
