The patch titled net: convert %p usage to %pK has been removed from the -mm tree. Its filename was net-convert-%p-usage-to-%pk.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: net: convert %p usage to %pK From: Dan Rosenberg <drosenberg@xxxxxxxxxxxxx> The %pK format specifier is designed to hide exposed kernel pointers, specifically via /proc interfaces. Exposing these pointers provides an easy target for kernel write vulnerabilities, since they reveal the locations of writable structures containing easily triggerable function pointers. The behavior of %pK depends on the kptr_restrict sysctl. If kptr_restrict is set to 0, no deviation from the standard %p behavior occurs. If kptr_restrict is set to 1, the default, if the current user (intended to be a reader via seq_printf(), etc.) does not have CAP_SYSLOG (currently in the LSM tree), kernel pointers using %pK are printed as 0's. If kptr_restrict is set to 2, kernel pointers using %pK are printed as 0's regardless of privileges. Replacing with 0's was chosen over the default "(null)", which cannot be parsed by userland %p, which expects "(nil)". The supporting code for kptr_restrict and %pK are currently in the -mm tree. This patch converts users of %p in net/ to %pK. Cases of printing pointers to the syslog are not covered, since this would eliminate useful information for postmortem debugging and the reading of the syslog is already optionally protected by the dmesg_restrict sysctl. Signed-off-by: Dan Rosenberg <drosenberg@xxxxxxxxxxxxx> Cc: James Morris <jmorris@xxxxxxxxx> Cc: Eric Dumazet <eric.dumazet@xxxxxxxxx> Cc: Thomas Graf <tgraf@xxxxxxxxxxxxx> Cc: Eugene Teo <eugeneteo@xxxxxxxxxx> Cc: Kees Cook <kees.cook@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: David S. Miller <davem@xxxxxxxxxxxxx> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Cc: Eric Paris <eparis@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- net/atm/proc.c | 4 ++-- net/can/bcm.c | 6 +++--- net/ipv4/raw.c | 2 +- net/ipv4/tcp_ipv4.c | 6 +++--- net/ipv4/udp.c | 2 +- net/ipv6/raw.c | 2 +- net/ipv6/tcp_ipv6.c | 6 +++--- net/ipv6/udp.c | 2 +- net/key/af_key.c | 2 +- net/netlink/af_netlink.c | 2 +- net/packet/af_packet.c | 2 +- net/phonet/socket.c | 2 +- net/sctp/proc.c | 4 ++-- net/unix/af_unix.c | 2 +- 14 files changed, 22 insertions(+), 22 deletions(-) diff -puN net/atm/proc.c~net-convert-%p-usage-to-%pk net/atm/proc.c --- a/net/atm/proc.c~net-convert-%p-usage-to-%pk +++ a/net/atm/proc.c @@ -191,7 +191,7 @@ static void vcc_info(struct seq_file *se { struct sock *sk = sk_atm(vcc); - seq_printf(seq, "%p ", vcc); + seq_printf(seq, "%pK ", vcc); if (!vcc->dev) seq_printf(seq, "Unassigned "); else @@ -218,7 +218,7 @@ static void svc_info(struct seq_file *se { if (!vcc->dev) seq_printf(seq, sizeof(void *) == 4 ? - "N/A@%p%10s" : "N/A@%p%2s", vcc, ""); + "N/A@%pK%10s" : "N/A@%pK%2s", vcc, ""); else seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi, vcc->vci); diff -puN net/can/bcm.c~net-convert-%p-usage-to-%pk net/can/bcm.c --- a/net/can/bcm.c~net-convert-%p-usage-to-%pk +++ a/net/can/bcm.c @@ -165,9 +165,9 @@ static int bcm_proc_show(struct seq_file struct bcm_sock *bo = bcm_sk(sk); struct bcm_op *op; - seq_printf(m, ">>> socket %p", sk->sk_socket); - seq_printf(m, " / sk %p", sk); - seq_printf(m, " / bo %p", bo); + seq_printf(m, ">>> socket %pK", sk->sk_socket); + seq_printf(m, " / sk %pK", sk); + seq_printf(m, " / bo %pK", bo); seq_printf(m, " / dropped %lu", bo->dropped_usr_msgs); seq_printf(m, " / bound %s", bcm_proc_getifname(ifname, bo->ifindex)); seq_printf(m, " <<<\n"); diff -puN net/ipv4/raw.c~net-convert-%p-usage-to-%pk net/ipv4/raw.c --- a/net/ipv4/raw.c~net-convert-%p-usage-to-%pk +++ a/net/ipv4/raw.c @@ -979,7 +979,7 @@ static void raw_sock_seq_show(struct seq srcp = inet->inet_num; seq_printf(seq, "%4d: %08X:%04X %08X:%04X" - " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", + " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n", i, src, srcp, dest, destp, sp->sk_state, sk_wmem_alloc_get(sp), sk_rmem_alloc_get(sp), diff -puN net/ipv4/tcp_ipv4.c~net-convert-%p-usage-to-%pk net/ipv4/tcp_ipv4.c --- a/net/ipv4/tcp_ipv4.c~net-convert-%p-usage-to-%pk +++ a/net/ipv4/tcp_ipv4.c @@ -2371,7 +2371,7 @@ static void get_openreq4(struct sock *sk int ttd = req->expires - jiffies; seq_printf(f, "%4d: %08X:%04X %08X:%04X" - " %02X %08X:%08X %02X:%08lX %08X %5d %8d %u %d %p%n", + " %02X %08X:%08X %02X:%08lX %08X %5d %8d %u %d %pK%n", i, ireq->loc_addr, ntohs(inet_sk(sk)->inet_sport), @@ -2426,7 +2426,7 @@ static void get_tcp4_sock(struct sock *s rx_queue = max_t(int, tp->rcv_nxt - tp->copied_seq, 0); seq_printf(f, "%4d: %08X:%04X %08X:%04X %02X %08X:%08X %02X:%08lX " - "%08X %5d %8d %lu %d %p %lu %lu %u %u %d%n", + "%08X %5d %8d %lu %d %pK %lu %lu %u %u %d%n", i, src, srcp, dest, destp, sk->sk_state, tp->write_seq - tp->snd_una, rx_queue, @@ -2461,7 +2461,7 @@ static void get_timewait4_sock(struct in srcp = ntohs(tw->tw_sport); seq_printf(f, "%4d: %08X:%04X %08X:%04X" - " %02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %p%n", + " %02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %pK%n", i, src, srcp, dest, destp, tw->tw_substate, 0, 0, 3, jiffies_to_clock_t(ttd), 0, 0, 0, 0, atomic_read(&tw->tw_refcnt), tw, len); diff -puN net/ipv4/udp.c~net-convert-%p-usage-to-%pk net/ipv4/udp.c --- a/net/ipv4/udp.c~net-convert-%p-usage-to-%pk +++ a/net/ipv4/udp.c @@ -2090,7 +2090,7 @@ static void udp4_format_sock(struct sock __u16 srcp = ntohs(inet->inet_sport); seq_printf(f, "%5d: %08X:%04X %08X:%04X" - " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d%n", + " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d%n", bucket, src, srcp, dest, destp, sp->sk_state, sk_wmem_alloc_get(sp), sk_rmem_alloc_get(sp), diff -puN net/ipv6/raw.c~net-convert-%p-usage-to-%pk net/ipv6/raw.c --- a/net/ipv6/raw.c~net-convert-%p-usage-to-%pk +++ a/net/ipv6/raw.c @@ -1240,7 +1240,7 @@ static void raw6_sock_seq_show(struct se srcp = inet_sk(sp)->inet_num; seq_printf(seq, "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " - "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", + "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n", i, src->s6_addr32[0], src->s6_addr32[1], src->s6_addr32[2], src->s6_addr32[3], srcp, diff -puN net/ipv6/tcp_ipv6.c~net-convert-%p-usage-to-%pk net/ipv6/tcp_ipv6.c --- a/net/ipv6/tcp_ipv6.c~net-convert-%p-usage-to-%pk +++ a/net/ipv6/tcp_ipv6.c @@ -2036,7 +2036,7 @@ static void get_openreq6(struct seq_file seq_printf(seq, "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " - "%02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %p\n", + "%02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %pK\n", i, src->s6_addr32[0], src->s6_addr32[1], src->s6_addr32[2], src->s6_addr32[3], @@ -2087,7 +2087,7 @@ static void get_tcp6_sock(struct seq_fil seq_printf(seq, "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " - "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %lu %lu %u %u %d\n", + "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %lu %lu %u %u %d\n", i, src->s6_addr32[0], src->s6_addr32[1], src->s6_addr32[2], src->s6_addr32[3], srcp, @@ -2129,7 +2129,7 @@ static void get_timewait6_sock(struct se seq_printf(seq, "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " - "%02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %p\n", + "%02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %pK\n", i, src->s6_addr32[0], src->s6_addr32[1], src->s6_addr32[2], src->s6_addr32[3], srcp, diff -puN net/ipv6/udp.c~net-convert-%p-usage-to-%pk net/ipv6/udp.c --- a/net/ipv6/udp.c~net-convert-%p-usage-to-%pk +++ a/net/ipv6/udp.c @@ -1391,7 +1391,7 @@ static void udp6_sock_seq_show(struct se srcp = ntohs(inet->inet_sport); seq_printf(seq, "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " - "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", + "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n", bucket, src->s6_addr32[0], src->s6_addr32[1], src->s6_addr32[2], src->s6_addr32[3], srcp, diff -puN net/key/af_key.c~net-convert-%p-usage-to-%pk net/key/af_key.c --- a/net/key/af_key.c~net-convert-%p-usage-to-%pk +++ a/net/key/af_key.c @@ -3656,7 +3656,7 @@ static int pfkey_seq_show(struct seq_fil if (v == SEQ_START_TOKEN) seq_printf(f ,"sk RefCnt Rmem Wmem User Inode\n"); else - seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n", + seq_printf(f, "%pK %-6d %-6u %-6u %-6u %-6lu\n", s, atomic_read(&s->sk_refcnt), sk_rmem_alloc_get(s), diff -puN net/netlink/af_netlink.c~net-convert-%p-usage-to-%pk net/netlink/af_netlink.c --- a/net/netlink/af_netlink.c~net-convert-%p-usage-to-%pk +++ a/net/netlink/af_netlink.c @@ -1985,7 +1985,7 @@ static int netlink_seq_show(struct seq_f struct sock *s = v; struct netlink_sock *nlk = nlk_sk(s); - seq_printf(seq, "%p %-3d %-6d %08x %-8d %-8d %p %-8d %-8d %-8lu\n", + seq_printf(seq, "%pK %-3d %-6d %08x %-8d %-8d %pK %-8d %-8d %-8lu\n", s, s->sk_protocol, nlk->pid, diff -puN net/packet/af_packet.c~net-convert-%p-usage-to-%pk net/packet/af_packet.c --- a/net/packet/af_packet.c~net-convert-%p-usage-to-%pk +++ a/net/packet/af_packet.c @@ -2706,7 +2706,7 @@ static int packet_seq_show(struct seq_fi const struct packet_sock *po = pkt_sk(s); seq_printf(seq, - "%p %-6d %-4d %04x %-5d %1d %-6u %-6u %-6lu\n", + "%pK %-6d %-4d %04x %-5d %1d %-6u %-6u %-6lu\n", s, atomic_read(&s->sk_refcnt), s->sk_type, diff -puN net/phonet/socket.c~net-convert-%p-usage-to-%pk net/phonet/socket.c --- a/net/phonet/socket.c~net-convert-%p-usage-to-%pk +++ a/net/phonet/socket.c @@ -607,7 +607,7 @@ static int pn_sock_seq_show(struct seq_f struct pn_sock *pn = pn_sk(sk); seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu " - "%d %p %d%n", + "%d %pK %d%n", sk->sk_protocol, pn->sobject, pn->dobject, pn->resource, sk->sk_state, sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk), diff -puN net/sctp/proc.c~net-convert-%p-usage-to-%pk net/sctp/proc.c --- a/net/sctp/proc.c~net-convert-%p-usage-to-%pk +++ a/net/sctp/proc.c @@ -212,7 +212,7 @@ static int sctp_eps_seq_show(struct seq_ sctp_for_each_hentry(epb, node, &head->chain) { ep = sctp_ep(epb); sk = epb->sk; - seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk, + seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk, sctp_sk(sk)->type, sk->sk_state, hash, epb->bind_addr.port, sock_i_uid(sk), sock_i_ino(sk)); @@ -316,7 +316,7 @@ static int sctp_assocs_seq_show(struct s assoc = sctp_assoc(epb); sk = epb->sk; seq_printf(seq, - "%8p %8p %-3d %-3d %-2d %-4d " + "%8pK %8pK %-3d %-3d %-2d %-4d " "%4d %8d %8d %7d %5lu %-5d %5d ", assoc, sk, sctp_sk(sk)->type, sk->sk_state, assoc->state, hash, diff -puN net/unix/af_unix.c~net-convert-%p-usage-to-%pk net/unix/af_unix.c --- a/net/unix/af_unix.c~net-convert-%p-usage-to-%pk +++ a/net/unix/af_unix.c @@ -2254,7 +2254,7 @@ static int unix_seq_show(struct seq_file struct unix_sock *u = unix_sk(s); unix_state_lock(s); - seq_printf(seq, "%p: %08X %08X %08X %04X %02X %5lu", + seq_printf(seq, "%pK: %08X %08X %08X %04X %02X %5lu", s, atomic_read(&s->sk_refcnt), 0, _ Patches currently in -mm which might be from drosenberg@xxxxxxxxxxxxx are linux-next.patch drivers-scsi-pmcraid-reject-negative-request-size.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html