kernel/linux.git/arch/xtensa/platforms, branch v6.6.131

xtensa: simdisk: add input size check in proc_write_simdisk

2025-10-19T14:30:52+00:00

commit 5d5f08fd0cd970184376bee07d59f635c8403f63 upstream. A malicious user could pass an arbitrarily bad value to memdup_user_nul(), potentially causing kernel crash. This follows the same pattern as commit ee76746387f6 ("netdevsim: prevent bad user input in nsim_dev_health_break_write()") Fixes: b6c7e873daf7 ("xtensa: ISS: add host file-based simulated disk") Fixes: 16e5c1fc3604 ("convert a bunch of open-coded instances of memdup_user_nul()") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin Message-Id: <20250829083015.1992751-1-linmq006@gmail.com> Signed-off-by: Max Filippov Signed-off-by: Greg Kroah-Hartman

xtensa: iss/network: make functions static

2023-09-20T12:03:21+00:00

Make 2 functions static to prevent build warnings: arch/xtensa/platforms/iss/network.c:204:16: warning: no previous prototype for 'tuntap_protocol' [-Wmissing-prototypes] 204 | unsigned short tuntap_protocol(struct sk_buff *skb) arch/xtensa/platforms/iss/network.c:444:6: warning: no previous prototype for 'iss_net_user_timer_expire' [-Wmissing-prototypes] 444 | void iss_net_user_timer_expire(struct timer_list *unused) Fixes: 7282bee78798 ("xtensa: Architecture support for Tensilica Xtensa Part 8") Fixes: d8479a21a98b ("xtensa: Convert timers to use timer_setup()") Signed-off-by: Randy Dunlap Cc: Chris Zankel Cc: Max Filippov Message-Id: <20230920052139.10570-14-rdunlap@infradead.org> Signed-off-by: Max Filippov

tty: make tty_operations::write()'s count size_t

2023-08-11T19:12:46+00:00

Unify with the rest of the code. Use size_t for counts and ssize_t for retval. Signed-off-by: "Jiri Slaby (SUSE)" Link: https://lore.kernel.org/r/20230810091510.13006-30-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman

tty: propagate u8 data to tty_operations::write()

2023-08-11T19:12:46+00:00

Data are now typed as u8. Propagate this change to tty_operations::write(). Signed-off-by: "Jiri Slaby (SUSE)" Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: Geert Uytterhoeven Cc: Richard Weinberger Cc: Anton Ivanov Cc: Johannes Berg Cc: Chris Zankel Cc: Max Filippov Cc: Arnd Bergmann Cc: Vaibhav Gupta Cc: Jens Taprogge Cc: Karsten Keil Cc: Scott Branden Cc: Ulf Hansson Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Alexander Gordeev Cc: Christian Borntraeger Cc: Sven Schnelle Cc: David Lin Cc: Johan Hovold Cc: Alex Elder Cc: Laurentiu Tudor Cc: Jiri Kosina Cc: David Sterba Cc: Shawn Guo Cc: Sascha Hauer Cc: Pengutronix Kernel Team Cc: Fabio Estevam Cc: NXP Linux Team Cc: Arnaud Pouliquen Cc: Oliver Neukum Cc: Mathias Nyman Cc: Marcel Holtmann Cc: Johan Hedberg Cc: Luiz Augusto von Dentz Link: https://lore.kernel.org/r/20230810091510.13006-28-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman

tty: xtensa/iss: drop unneeded tty_operations hooks

2023-08-11T19:12:44+00:00

All ::flush_chars(), ::hangup(), and ::wait_until_sent() from struct tty_operations are optional. There is no need to provide them with empty bodies. tty_operations::put_char() needs not be provided if it is the same as tty_operations::write(tty, &ch, 1). So drop all of them. Signed-off-by: "Jiri Slaby (SUSE)" Cc: Chris Zankel Cc: Max Filippov Acked-by: Max Filippov Link: https://lore.kernel.org/r/20230810091510.13006-2-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman

xtensa: ISS: fix call to split_if_spec

2023-07-11T04:41:00+00:00

split_if_spec expects a NULL-pointer as an end marker for the argument list, but tuntap_probe never supplied that terminating NULL. As a result incorrectly formatted interface specification string may cause a crash because of the random memory access. Fix that by adding NULL terminator to the split_if_spec argument list. Cc: stable@vger.kernel.org Fixes: 7282bee78798 ("[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 8") Signed-off-by: Max Filippov

xtensa: ISS: add comment about etherdev freeing

2023-07-11T04:40:58+00:00

iss_net_configure explicitly frees etherdev in all error return paths except one where register_netdevice fails. In that remaining error return path the etherdev is freed by the iss_net_pdev_release callback triggered by the platform_device_unregister call. Add a comment stating that. Signed-off-by: Max Filippov

Merge tag 'xtensa-20230627' of https://github.com/jcmvbkbc/linux-xtensa

2023-06-27T22:44:11+00:00

Pull xtensa updates from Max Filippov: - clean up platform_* interface of the xtensa architecture - enable HAVE_ASM_MODVERSIONS - drop ARCH_WANT_FRAME_POINTERS - clean up unaligned access exception handler - provide handler for load/store exceptions - various small fixes and cleanups * tag 'xtensa-20230627' of https://github.com/jcmvbkbc/linux-xtensa: xtensa: dump userspace code around the exception PC xtensa: rearrange show_stack output xtensa: add load/store exception handler xtensa: rearrange unaligned exception handler xtensa: always install slow handler for unaligned access exception xtensa: move early_trap_init from kasan_early_init to init_arch xtensa: drop ARCH_WANT_FRAME_POINTERS xtensa: report trax and perf counters in cpuinfo xtensa: add asm-prototypes.h xtensa: only build __strncpy_user with CONFIG_ARCH_HAS_STRNCPY_FROM_USER xtensa: drop bcopy implementation xtensa: drop EXPORT_SYMBOL for common_exception_return xtensa: boot-redboot: clean up Makefile xtensa: clean up default platform functions xtensa: drop platform_halt and platform_power_off xtensa: drop platform_restart xtensa: drop platform_heartbeat xtensa: xt2000: drop empty platform_init

xtensa: drop platform_halt and platform_power_off

2023-06-13T02:48:56+00:00

Instead of using xtensa-specific platform_halt and platform_power_off callbacks use do_kernel_power_off in the machine_halt and machine_power_off and reimplement existing platform_halt and platform_power_off users with register_sys_off_handler. Drop platform_halt and platform_power_off declarations and default implementations. Signed-off-by: Max Filippov

xtensa: drop platform_restart

2023-06-13T02:48:56+00:00

Instead of using xtensa-specific platform_restart callback use do_kernel_restart in the machine_restart implementation and reimplement existing platform_restart users with register_restart_handler. Drop platform_restart declaration and default implementation. Signed-off-by: Max Filippov