Rename README to README.md #6
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Changed README to README.md
ramacassis
reviewed
Mar 21, 2024
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Congrats for your first PR!
I personally think README is also valid, and actually used in many other places in the repo.
Also consider using the mailing list to submit patches
halstead
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Sep 6, 2024
In systemd/systemd@924453c ProtectHome was set to true for systemd-coredump in order to reduce risk, since an attacker could craft a malicious binary in order to compromise systemd-coredump. At that point the object analysis was done in the main systemd-coredump process. Because of this systemd-coredump is unable to product symbolicated call-stacks for binaries running under /home ("n/a" is shown instead of function names). However, later in systemd/systemd@61aea45 systemd-coredump was changed to do the object analysis in a forked process, covering those security concerns. Let's set ProtectHome to read-only so that systemd-coredump produces symbolicated call-stacks for processes running under /home. Note: it still does not work in /tmp (because of PrivateTmp=yes) and in /root (for unknown reasons). Before the change (with minidebuginfo enabled): root@qemux86-64:~# /home/sleep 1000 & [1] 426 root@qemux86-64:~# kill -11 $(pidof sleep) root@qemux86-64:~# coredumpctl info PID: 426 (sleep) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2024-09-06 17:25:18 UTC (3s ago) Command Line: /home/sleep 1000 Executable: /home/sleep Control Group: /system.slice/system-serial\x2dgetty.slice/serial-getty@ttyS0.service Unit: serial-getty@ttyS0.service Slice: system-serial\x2dgetty.slice Boot ID: 44ef4ddfaad249ceaa29d1e9f330d3b5 Machine ID: fb279f18f2c849c59768754c7a274ee3 Hostname: qemux86-64 Storage: /var/lib/systemd/coredump/core.sleep.0.44ef4ddfaad249ceaa29d1e9f330d3b5.426.1725643518000000.zst (present) Size on Disk: 16.5K Message: Process 426 (sleep) of user 0 dumped core. Stack trace of thread 426: #0 0x00007f365f3849a7 clock_nanosleep (libc.so.6 + 0xd49a7) #1 0x00007f365f38f667 __nanosleep (libc.so.6 + 0xdf667) #2 0x0000561fee703737 n/a (/home/sleep + 0x7737) #3 0x000000003a6227c5 n/a (n/a + 0x0) ELF object binary architecture: AMD x86-64 [1]+ Segmentation fault (core dumped) /home/sleep 1000 After the change (with minidebuginfo enabled): root@qemux86-64:~# /home/sleep 1000 & [1] 450 root@qemux86-64:~# kill -11 $(pidof sleep) root@qemux86-64:~# coredumpctl info PID: 450 (sleep) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2024-09-06 17:30:12 UTC (4s ago) Command Line: /home/sleep 1000 Executable: /home/sleep Control Group: /system.slice/system-serial\x2dgetty.slice/serial-getty@ttyS0.service Unit: serial-getty@ttyS0.service Slice: system-serial\x2dgetty.slice Boot ID: 44ef4ddfaad249ceaa29d1e9f330d3b5 Machine ID: fb279f18f2c849c59768754c7a274ee3 Hostname: qemux86-64 Storage: /var/lib/systemd/coredump/core.sleep.0.44ef4ddfaad249ceaa29d1e9f330d3b5.450.1725643812000000.zst (present) Size on Disk: 16.5K Message: Process 450 (sleep) of user 0 dumped core. Stack trace of thread 450: #0 0x00007f795dd689a7 clock_nanosleep (libc.so.6 + 0xd49a7) #1 0x00007f795dd73667 __nanosleep (libc.so.6 + 0xdf667) #2 0x0000561965c9d737 rpl_nanosleep (sleep + 0x7737) #3 0x0000561965c9d0c1 xnanosleep (sleep + 0x70c1) #4 0x0000561965c985c8 main (sleep + 0x25c8) #5 0x00007f795dcba01b __libc_start_call_main (libc.so.6 + 0x2601b) #6 0x00007f795dcba0d9 __libc_start_main (libc.so.6 + 0x260d9) #7 0x0000561965c98685 _start (sleep + 0x2685) ELF object binary architecture: AMD x86-64 [1]+ Segmentation fault (core dumped) /home/sleep 1000 (From OE-Core rev: e71443c75afc10008ecf1aae22d3155389b07d58) Signed-off-by: Etienne Cordonnier <ecordonnier@snap.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
halstead
pushed a commit
that referenced
this pull request
Sep 7, 2024
In systemd/systemd@924453c ProtectHome was set to true for systemd-coredump in order to reduce risk, since an attacker could craft a malicious binary in order to compromise systemd-coredump. At that point the object analysis was done in the main systemd-coredump process. Because of this systemd-coredump is unable to product symbolicated call-stacks for binaries running under /home ("n/a" is shown instead of function names). However, later in systemd/systemd@61aea45 systemd-coredump was changed to do the object analysis in a forked process, covering those security concerns. Let's set ProtectHome to read-only so that systemd-coredump produces symbolicated call-stacks for processes running under /home. Note: it still does not work in /tmp (because of PrivateTmp=yes) and in /root (for unknown reasons). Before the change (with minidebuginfo enabled): root@qemux86-64:~# /home/sleep 1000 & [1] 426 root@qemux86-64:~# kill -11 $(pidof sleep) root@qemux86-64:~# coredumpctl info PID: 426 (sleep) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2024-09-06 17:25:18 UTC (3s ago) Command Line: /home/sleep 1000 Executable: /home/sleep Control Group: /system.slice/system-serial\x2dgetty.slice/serial-getty@ttyS0.service Unit: serial-getty@ttyS0.service Slice: system-serial\x2dgetty.slice Boot ID: 44ef4ddfaad249ceaa29d1e9f330d3b5 Machine ID: fb279f18f2c849c59768754c7a274ee3 Hostname: qemux86-64 Storage: /var/lib/systemd/coredump/core.sleep.0.44ef4ddfaad249ceaa29d1e9f330d3b5.426.1725643518000000.zst (present) Size on Disk: 16.5K Message: Process 426 (sleep) of user 0 dumped core. Stack trace of thread 426: #0 0x00007f365f3849a7 clock_nanosleep (libc.so.6 + 0xd49a7) #1 0x00007f365f38f667 __nanosleep (libc.so.6 + 0xdf667) #2 0x0000561fee703737 n/a (/home/sleep + 0x7737) #3 0x000000003a6227c5 n/a (n/a + 0x0) ELF object binary architecture: AMD x86-64 [1]+ Segmentation fault (core dumped) /home/sleep 1000 After the change (with minidebuginfo enabled): root@qemux86-64:~# /home/sleep 1000 & [1] 450 root@qemux86-64:~# kill -11 $(pidof sleep) root@qemux86-64:~# coredumpctl info PID: 450 (sleep) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2024-09-06 17:30:12 UTC (4s ago) Command Line: /home/sleep 1000 Executable: /home/sleep Control Group: /system.slice/system-serial\x2dgetty.slice/serial-getty@ttyS0.service Unit: serial-getty@ttyS0.service Slice: system-serial\x2dgetty.slice Boot ID: 44ef4ddfaad249ceaa29d1e9f330d3b5 Machine ID: fb279f18f2c849c59768754c7a274ee3 Hostname: qemux86-64 Storage: /var/lib/systemd/coredump/core.sleep.0.44ef4ddfaad249ceaa29d1e9f330d3b5.450.1725643812000000.zst (present) Size on Disk: 16.5K Message: Process 450 (sleep) of user 0 dumped core. Stack trace of thread 450: #0 0x00007f795dd689a7 clock_nanosleep (libc.so.6 + 0xd49a7) #1 0x00007f795dd73667 __nanosleep (libc.so.6 + 0xdf667) #2 0x0000561965c9d737 rpl_nanosleep (sleep + 0x7737) #3 0x0000561965c9d0c1 xnanosleep (sleep + 0x70c1) #4 0x0000561965c985c8 main (sleep + 0x25c8) #5 0x00007f795dcba01b __libc_start_call_main (libc.so.6 + 0x2601b) #6 0x00007f795dcba0d9 __libc_start_main (libc.so.6 + 0x260d9) #7 0x0000561965c98685 _start (sleep + 0x2685) ELF object binary architecture: AMD x86-64 [1]+ Segmentation fault (core dumped) /home/sleep 1000 (From OE-Core rev: 13c416f8c689e8bae8460ec4aafc488ea62a5858) Signed-off-by: Etienne Cordonnier <ecordonnier@snap.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
halstead
pushed a commit
that referenced
this pull request
Sep 9, 2024
In systemd/systemd@924453c ProtectHome was set to true for systemd-coredump in order to reduce risk, since an attacker could craft a malicious binary in order to compromise systemd-coredump. At that point the object analysis was done in the main systemd-coredump process. Because of this systemd-coredump is unable to product symbolicated call-stacks for binaries running under /home ("n/a" is shown instead of function names). However, later in systemd/systemd@61aea45 systemd-coredump was changed to do the object analysis in a forked process, covering those security concerns. Let's set ProtectHome to read-only so that systemd-coredump produces symbolicated call-stacks for processes running under /home. Note: it still does not work in /tmp (because of PrivateTmp=yes) and in /root (for unknown reasons). Before the change (with minidebuginfo enabled): root@qemux86-64:~# /home/sleep 1000 & [1] 426 root@qemux86-64:~# kill -11 $(pidof sleep) root@qemux86-64:~# coredumpctl info PID: 426 (sleep) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2024-09-06 17:25:18 UTC (3s ago) Command Line: /home/sleep 1000 Executable: /home/sleep Control Group: /system.slice/system-serial\x2dgetty.slice/serial-getty@ttyS0.service Unit: serial-getty@ttyS0.service Slice: system-serial\x2dgetty.slice Boot ID: 44ef4ddfaad249ceaa29d1e9f330d3b5 Machine ID: fb279f18f2c849c59768754c7a274ee3 Hostname: qemux86-64 Storage: /var/lib/systemd/coredump/core.sleep.0.44ef4ddfaad249ceaa29d1e9f330d3b5.426.1725643518000000.zst (present) Size on Disk: 16.5K Message: Process 426 (sleep) of user 0 dumped core. Stack trace of thread 426: #0 0x00007f365f3849a7 clock_nanosleep (libc.so.6 + 0xd49a7) #1 0x00007f365f38f667 __nanosleep (libc.so.6 + 0xdf667) #2 0x0000561fee703737 n/a (/home/sleep + 0x7737) #3 0x000000003a6227c5 n/a (n/a + 0x0) ELF object binary architecture: AMD x86-64 [1]+ Segmentation fault (core dumped) /home/sleep 1000 After the change (with minidebuginfo enabled): root@qemux86-64:~# /home/sleep 1000 & [1] 450 root@qemux86-64:~# kill -11 $(pidof sleep) root@qemux86-64:~# coredumpctl info PID: 450 (sleep) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2024-09-06 17:30:12 UTC (4s ago) Command Line: /home/sleep 1000 Executable: /home/sleep Control Group: /system.slice/system-serial\x2dgetty.slice/serial-getty@ttyS0.service Unit: serial-getty@ttyS0.service Slice: system-serial\x2dgetty.slice Boot ID: 44ef4ddfaad249ceaa29d1e9f330d3b5 Machine ID: fb279f18f2c849c59768754c7a274ee3 Hostname: qemux86-64 Storage: /var/lib/systemd/coredump/core.sleep.0.44ef4ddfaad249ceaa29d1e9f330d3b5.450.1725643812000000.zst (present) Size on Disk: 16.5K Message: Process 450 (sleep) of user 0 dumped core. Stack trace of thread 450: #0 0x00007f795dd689a7 clock_nanosleep (libc.so.6 + 0xd49a7) #1 0x00007f795dd73667 __nanosleep (libc.so.6 + 0xdf667) #2 0x0000561965c9d737 rpl_nanosleep (sleep + 0x7737) #3 0x0000561965c9d0c1 xnanosleep (sleep + 0x70c1) #4 0x0000561965c985c8 main (sleep + 0x25c8) #5 0x00007f795dcba01b __libc_start_call_main (libc.so.6 + 0x2601b) #6 0x00007f795dcba0d9 __libc_start_main (libc.so.6 + 0x260d9) #7 0x0000561965c98685 _start (sleep + 0x2685) ELF object binary architecture: AMD x86-64 [1]+ Segmentation fault (core dumped) /home/sleep 1000 (From OE-Core rev: 3c37bf8e4844d676dde3d7ce6ad5b7de32196975) Signed-off-by: Etienne Cordonnier <ecordonnier@snap.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
halstead
pushed a commit
that referenced
this pull request
Sep 9, 2024
In systemd/systemd@924453c ProtectHome was set to true for systemd-coredump in order to reduce risk, since an attacker could craft a malicious binary in order to compromise systemd-coredump. At that point the object analysis was done in the main systemd-coredump process. Because of this systemd-coredump is unable to product symbolicated call-stacks for binaries running under /home ("n/a" is shown instead of function names). However, later in systemd/systemd@61aea45 systemd-coredump was changed to do the object analysis in a forked process, covering those security concerns. Let's set ProtectHome to read-only so that systemd-coredump produces symbolicated call-stacks for processes running under /home. Note: it still does not work in /tmp (because of PrivateTmp=yes) and in /root (for unknown reasons). Before the change (with minidebuginfo enabled): root@qemux86-64:~# /home/sleep 1000 & [1] 426 root@qemux86-64:~# kill -11 $(pidof sleep) root@qemux86-64:~# coredumpctl info PID: 426 (sleep) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2024-09-06 17:25:18 UTC (3s ago) Command Line: /home/sleep 1000 Executable: /home/sleep Control Group: /system.slice/system-serial\x2dgetty.slice/serial-getty@ttyS0.service Unit: serial-getty@ttyS0.service Slice: system-serial\x2dgetty.slice Boot ID: 44ef4ddfaad249ceaa29d1e9f330d3b5 Machine ID: fb279f18f2c849c59768754c7a274ee3 Hostname: qemux86-64 Storage: /var/lib/systemd/coredump/core.sleep.0.44ef4ddfaad249ceaa29d1e9f330d3b5.426.1725643518000000.zst (present) Size on Disk: 16.5K Message: Process 426 (sleep) of user 0 dumped core. Stack trace of thread 426: #0 0x00007f365f3849a7 clock_nanosleep (libc.so.6 + 0xd49a7) #1 0x00007f365f38f667 __nanosleep (libc.so.6 + 0xdf667) #2 0x0000561fee703737 n/a (/home/sleep + 0x7737) #3 0x000000003a6227c5 n/a (n/a + 0x0) ELF object binary architecture: AMD x86-64 [1]+ Segmentation fault (core dumped) /home/sleep 1000 After the change (with minidebuginfo enabled): root@qemux86-64:~# /home/sleep 1000 & [1] 450 root@qemux86-64:~# kill -11 $(pidof sleep) root@qemux86-64:~# coredumpctl info PID: 450 (sleep) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2024-09-06 17:30:12 UTC (4s ago) Command Line: /home/sleep 1000 Executable: /home/sleep Control Group: /system.slice/system-serial\x2dgetty.slice/serial-getty@ttyS0.service Unit: serial-getty@ttyS0.service Slice: system-serial\x2dgetty.slice Boot ID: 44ef4ddfaad249ceaa29d1e9f330d3b5 Machine ID: fb279f18f2c849c59768754c7a274ee3 Hostname: qemux86-64 Storage: /var/lib/systemd/coredump/core.sleep.0.44ef4ddfaad249ceaa29d1e9f330d3b5.450.1725643812000000.zst (present) Size on Disk: 16.5K Message: Process 450 (sleep) of user 0 dumped core. Stack trace of thread 450: #0 0x00007f795dd689a7 clock_nanosleep (libc.so.6 + 0xd49a7) #1 0x00007f795dd73667 __nanosleep (libc.so.6 + 0xdf667) #2 0x0000561965c9d737 rpl_nanosleep (sleep + 0x7737) #3 0x0000561965c9d0c1 xnanosleep (sleep + 0x70c1) #4 0x0000561965c985c8 main (sleep + 0x25c8) #5 0x00007f795dcba01b __libc_start_call_main (libc.so.6 + 0x2601b) #6 0x00007f795dcba0d9 __libc_start_main (libc.so.6 + 0x260d9) #7 0x0000561965c98685 _start (sleep + 0x2685) ELF object binary architecture: AMD x86-64 [1]+ Segmentation fault (core dumped) /home/sleep 1000 (From OE-Core rev: b8c1f999038b7cd6fc2e80ed215541c8a4d9e19f) Signed-off-by: Etienne Cordonnier <ecordonnier@snap.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Changed README to README.md