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| author | Greg Kroah-Hartman <gregkh@google.com> | 2021-06-16 12:05:35 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2021-06-16 12:05:35 +0200 |
| commit | 28a3d5b101b3adfe4eef230ead62d824a103199e (patch) | |
| tree | 27c1a50aa74d3a3c65a7e4c2dfc383d693a48f30 /fs/proc/base.c | |
| parent | 8e20329c9797fabc6c2cade73b4371509b58e18b (diff) | |
| parent | 78fba0641f54c8dc3624eba7cbc1252be35fa18e (diff) | |
Merge 4.4.273 into android-4.4-p
Changes in 4.4.273
proc: Track /proc/$pid/attr/ opener mm_struct
net/nfc/rawsock.c: fix a permission check bug
ASoC: sti-sas: add missing MODULE_DEVICE_TABLE
isdn: mISDN: netjet: Fix crash in nj_probe:
bonding: init notify_work earlier to avoid uninitialized use
netlink: disable IRQs for netlink_lock_table()
net: mdiobus: get rid of a BUG_ON()
net/qla3xxx: fix schedule while atomic in ql_sem_spinlock
scsi: vmw_pvscsi: Set correct residual data length
scsi: target: qla2xxx: Wait for stop_phase1 at WWN removal
net: macb: ensure the device is available before accessing GEMGXL control registers
net: appletalk: cops: Fix data race in cops_probe1
MIPS: Fix kernel hang under FUNCTION_GRAPH_TRACER and PREEMPT_TRACER
bnx2x: Fix missing error code in bnx2x_iov_init_one()
powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers
powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P1010 i2c controllers
i2c: mpc: Make use of i2c_recover_bus()
i2c: mpc: implement erratum A-004447 workaround
kvm: avoid speculation-based attacks from out-of-range memslot accesses
btrfs: return value from btrfs_mark_extent_written() in case of error
cgroup1: don't allow '\n' in renaming
USB: f_ncm: ncm_bitrate (speed) is unsigned
usb: dwc3: ep0: fix NULL pointer exception
USB: serial: ftdi_sio: add NovaTech OrionMX product ID
USB: serial: omninet: add device id for Zyxel Omni 56K Plus
USB: serial: quatech2: fix control-request directions
usb: gadget: eem: fix wrong eem header operation
perf: Fix data race between pin_count increment/decrement
NFS: Fix a potential NULL dereference in nfs_get_client()
perf session: Correct buffer copying when peeking events
kvm: fix previous commit for 32-bit builds
NFSv4: nfs4_proc_set_acl needs to restore NFS_CAP_UIDGID_NOMAP on error.
scsi: core: Only put parent device if host state differs from SHOST_CREATED
ftrace: Do not blindly read the ip address in ftrace_bug()
proc: only require mm_struct for writing
Linux 4.4.273
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I97fdaeb60b62a57bf34ecceabda8be5cee23a0e7
Diffstat (limited to 'fs/proc/base.c')
| -rw-r--r-- | fs/proc/base.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 60490877986e..7137daebbe06 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -2471,6 +2471,13 @@ out: } #ifdef CONFIG_SECURITY +static int proc_pid_attr_open(struct inode *inode, struct file *file) +{ + file->private_data = NULL; + __mem_open(inode, file, PTRACE_MODE_READ_FSCREDS); + return 0; +} + static ssize_t proc_pid_attr_read(struct file * file, char __user * buf, size_t count, loff_t *ppos) { @@ -2501,7 +2508,7 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf, struct task_struct *task = get_proc_task(inode); /* A task may only write when it was the opener. */ - if (file->f_cred != current_real_cred()) + if (file->private_data != current->mm) return -EPERM; length = -ESRCH; @@ -2542,9 +2549,11 @@ out_no_task: } static const struct file_operations proc_pid_attr_operations = { + .open = proc_pid_attr_open, .read = proc_pid_attr_read, .write = proc_pid_attr_write, .llseek = generic_file_llseek, + .release = mem_release, }; static const struct pid_entry attr_dir_stuff[] = { |