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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org,
	Thadeu Lima de Souza Cascardo <cascardo@canonical.com>,
	Borislav Petkov <bp@suse.de>,
	Josh Poimboeuf <jpoimboe@kernel.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Linux Kernel Functional Testing <lkft@linaro.org>,
	Jack Wang <jinpu.wang@ionos.com>,
	Peter Zijlstra <peterz@infradead.org>
Subject: [PATCH 5.15 83/89] x86/kvm: fix FASTOP_SIZE when return thunks are enabled
Date: Fri, 22 Jul 2022 11:11:57 +0200	[thread overview]
Message-ID: <20220722091137.984544806@linuxfoundation.org> (raw)
In-Reply-To: <20220722091133.320803732@linuxfoundation.org>

From: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

commit 84e7051c0bc1f2a13101553959b3a9d9a8e24939 upstream.

The return thunk call makes the fastop functions larger, just like IBT
does. Consider a 16-byte FASTOP_SIZE when CONFIG_RETHUNK is enabled.

Otherwise, functions will be incorrectly aligned and when computing their
position for differently sized operators, they will executed in the middle
or end of a function, which may as well be an int3, leading to a crash
like:

[   36.091116] int3: 0000 [#1] SMP NOPTI
[   36.091119] CPU: 3 PID: 1371 Comm: qemu-system-x86 Not tainted 5.15.0-41-generic #44
[   36.091120] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014
[   36.091121] RIP: 0010:xaddw_ax_dx+0x9/0x10 [kvm]
[   36.091185] Code: 00 0f bb d0 c3 cc cc cc cc 48 0f bb d0 c3 cc cc cc cc 0f 1f 80 00 00 00 00 0f c0 d0 c3 cc cc cc cc 66 0f c1 d0 c3 cc cc cc cc <0f> 1f 80 00 00 00 00 0f c1 d0 c3 cc cc cc cc 48 0f c1 d0 c3 cc cc
[   36.091186] RSP: 0018:ffffb1f541143c98 EFLAGS: 00000202
[   36.091188] RAX: 0000000089abcdef RBX: 0000000000000001 RCX: 0000000000000000
[   36.091188] RDX: 0000000076543210 RSI: ffffffffc073c6d0 RDI: 0000000000000200
[   36.091189] RBP: ffffb1f541143ca0 R08: ffff9f1803350a70 R09: 0000000000000002
[   36.091190] R10: ffff9f1803350a70 R11: 0000000000000000 R12: ffff9f1803350a70
[   36.091190] R13: ffffffffc077fee0 R14: 0000000000000000 R15: 0000000000000000
[   36.091191] FS:  00007efdfce8d640(0000) GS:ffff9f187dd80000(0000) knlGS:0000000000000000
[   36.091192] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   36.091192] CR2: 0000000000000000 CR3: 0000000009b62002 CR4: 0000000000772ee0
[   36.091195] PKRU: 55555554
[   36.091195] Call Trace:
[   36.091197]  <TASK>
[   36.091198]  ? fastop+0x5a/0xa0 [kvm]
[   36.091222]  x86_emulate_insn+0x7b8/0xe90 [kvm]
[   36.091244]  x86_emulate_instruction+0x2f4/0x630 [kvm]
[   36.091263]  ? kvm_arch_vcpu_load+0x7c/0x230 [kvm]
[   36.091283]  ? vmx_prepare_switch_to_host+0xf7/0x190 [kvm_intel]
[   36.091290]  complete_emulated_mmio+0x297/0x320 [kvm]
[   36.091310]  kvm_arch_vcpu_ioctl_run+0x32f/0x550 [kvm]
[   36.091330]  kvm_vcpu_ioctl+0x29e/0x6d0 [kvm]
[   36.091344]  ? kvm_vcpu_ioctl+0x120/0x6d0 [kvm]
[   36.091357]  ? __fget_files+0x86/0xc0
[   36.091362]  ? __fget_files+0x86/0xc0
[   36.091363]  __x64_sys_ioctl+0x92/0xd0
[   36.091366]  do_syscall_64+0x59/0xc0
[   36.091369]  ? syscall_exit_to_user_mode+0x27/0x50
[   36.091370]  ? do_syscall_64+0x69/0xc0
[   36.091371]  ? syscall_exit_to_user_mode+0x27/0x50
[   36.091372]  ? __x64_sys_writev+0x1c/0x30
[   36.091374]  ? do_syscall_64+0x69/0xc0
[   36.091374]  ? exit_to_user_mode_prepare+0x37/0xb0
[   36.091378]  ? syscall_exit_to_user_mode+0x27/0x50
[   36.091379]  ? do_syscall_64+0x69/0xc0
[   36.091379]  ? do_syscall_64+0x69/0xc0
[   36.091380]  ? do_syscall_64+0x69/0xc0
[   36.091381]  ? do_syscall_64+0x69/0xc0
[   36.091381]  entry_SYSCALL_64_after_hwframe+0x61/0xcb
[   36.091384] RIP: 0033:0x7efdfe6d1aff
[   36.091390] Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 77 1f 48 8b 44 24 18 64 48 2b 04 25 28 00
[   36.091391] RSP: 002b:00007efdfce8c460 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   36.091393] RAX: ffffffffffffffda RBX: 000000000000ae80 RCX: 00007efdfe6d1aff
[   36.091393] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000000c
[   36.091394] RBP: 0000558f1609e220 R08: 0000558f13fb8190 R09: 00000000ffffffff
[   36.091394] R10: 0000558f16b5e950 R11: 0000000000000246 R12: 0000000000000000
[   36.091394] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
[   36.091396]  </TASK>
[   36.091397] Modules linked in: isofs nls_iso8859_1 kvm_intel joydev kvm input_leds serio_raw sch_fq_codel dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua ipmi_devintf ipmi_msghandler drm msr ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel virtio_net net_failover crypto_simd ahci xhci_pci cryptd psmouse virtio_blk libahci xhci_pci_renesas failover
[   36.123271] ---[ end trace db3c0ab5a48fabcc ]---
[   36.123272] RIP: 0010:xaddw_ax_dx+0x9/0x10 [kvm]
[   36.123319] Code: 00 0f bb d0 c3 cc cc cc cc 48 0f bb d0 c3 cc cc cc cc 0f 1f 80 00 00 00 00 0f c0 d0 c3 cc cc cc cc 66 0f c1 d0 c3 cc cc cc cc <0f> 1f 80 00 00 00 00 0f c1 d0 c3 cc cc cc cc 48 0f c1 d0 c3 cc cc
[   36.123320] RSP: 0018:ffffb1f541143c98 EFLAGS: 00000202
[   36.123321] RAX: 0000000089abcdef RBX: 0000000000000001 RCX: 0000000000000000
[   36.123321] RDX: 0000000076543210 RSI: ffffffffc073c6d0 RDI: 0000000000000200
[   36.123322] RBP: ffffb1f541143ca0 R08: ffff9f1803350a70 R09: 0000000000000002
[   36.123322] R10: ffff9f1803350a70 R11: 0000000000000000 R12: ffff9f1803350a70
[   36.123323] R13: ffffffffc077fee0 R14: 0000000000000000 R15: 0000000000000000
[   36.123323] FS:  00007efdfce8d640(0000) GS:ffff9f187dd80000(0000) knlGS:0000000000000000
[   36.123324] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   36.123325] CR2: 0000000000000000 CR3: 0000000009b62002 CR4: 0000000000772ee0
[   36.123327] PKRU: 55555554
[   36.123328] Kernel panic - not syncing: Fatal exception in interrupt
[   36.123410] Kernel Offset: 0x1400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[   36.135305] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---

Fixes: aa3d480315ba ("x86: Use return-thunk in asm code")
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Co-developed-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Message-Id: <20220713171241.184026-1-cascardo@canonical.com>
Tested-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/kvm/emulate.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -187,8 +187,12 @@
 #define X8(x...) X4(x), X4(x)
 #define X16(x...) X8(x), X8(x)
 
-#define NR_FASTOP (ilog2(sizeof(ulong)) + 1)
-#define FASTOP_SIZE 8
+#define NR_FASTOP	(ilog2(sizeof(ulong)) + 1)
+#define RET_LENGTH	(1 + (4 * IS_ENABLED(CONFIG_RETHUNK)) + \
+			 IS_ENABLED(CONFIG_SLS))
+#define FASTOP_LENGTH	(ENDBR_INSN_SIZE + 7 + RET_LENGTH)
+#define FASTOP_SIZE	(8 << ((FASTOP_LENGTH > 8) & 1) << ((FASTOP_LENGTH > 16) & 1))
+static_assert(FASTOP_LENGTH <= FASTOP_SIZE);
 
 struct opcode {
 	u64 flags : 56;
@@ -437,8 +441,6 @@ static int fastop(struct x86_emulate_ctx
  * RET | JMP __x86_return_thunk	[1,5 bytes; CONFIG_RETHUNK]
  * INT3				[1 byte; CONFIG_SLS]
  */
-#define RET_LENGTH	(1 + (4 * IS_ENABLED(CONFIG_RETHUNK)) + \
-			 IS_ENABLED(CONFIG_SLS))
 #define SETCC_LENGTH	(3 + RET_LENGTH)
 #define SETCC_ALIGN	(4 << ((SETCC_LENGTH > 4) & 1) << ((SETCC_LENGTH > 8) & 1))
 static_assert(SETCC_LENGTH <= SETCC_ALIGN);



  parent reply	other threads:[~2022-07-22  9:30 UTC|newest]

Thread overview: 96+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-22  9:10 [PATCH 5.15 00/89] 5.15.57-rc1 review Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 01/89] x86/traps: Use pt_regs directly in fixup_bad_iret() Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 02/89] x86/entry: Switch the stack after error_entry() returns Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 03/89] x86/entry: Move PUSH_AND_CLEAR_REGS out of error_entry() Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 04/89] x86/entry: Dont call error_entry() for XENPV Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 05/89] objtool: Classify symbols Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 06/89] objtool: Explicitly avoid self modifying code in .altinstr_replacement Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 07/89] objtool: Shrink struct instruction Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 08/89] objtool,x86: Replace alternatives with .retpoline_sites Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 09/89] objtool: Introduce CFI hash Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 10/89] x86/retpoline: Remove unused replacement symbols Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 11/89] x86/asm: Fix register order Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 12/89] x86/asm: Fixup odd GEN-for-each-reg.h usage Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 13/89] x86/retpoline: Move the retpoline thunk declarations to nospec-branch.h Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 14/89] x86/retpoline: Create a retpoline thunk array Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 15/89] x86/alternative: Implement .retpoline_sites support Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 16/89] x86/alternative: Handle Jcc __x86_indirect_thunk_\reg Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 17/89] x86/alternative: Try inline spectre_v2=retpoline,amd Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 18/89] x86/alternative: Add debug prints to apply_retpolines() Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 19/89] bpf,x86: Simplify computing label offsets Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 20/89] bpf,x86: Respect X86_FEATURE_RETPOLINE* Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 21/89] objtool: Default ignore INT3 for unreachable Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 22/89] x86/entry: Remove skip_r11rcx Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 23/89] x86/realmode: build with -D__DISABLE_EXPORTS Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 24/89] x86/kvm/vmx: Make noinstr clean Greg Kroah-Hartman
2022-07-22  9:10 ` [PATCH 5.15 25/89] x86/cpufeatures: Move RETPOLINE flags to word 11 Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 26/89] x86/retpoline: Cleanup some #ifdefery Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 27/89] x86/retpoline: Swizzle retpoline thunk Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 28/89] x86/retpoline: Use -mfunction-return Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 29/89] x86: Undo return-thunk damage Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 30/89] x86,objtool: Create .return_sites Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 31/89] objtool: skip non-text sections when adding return-thunk sites Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 32/89] x86,static_call: Use alternative RET encoding Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 33/89] x86/ftrace: " Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 34/89] x86/bpf: " Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 35/89] x86/kvm: Fix SETcc emulation for return thunks Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 36/89] x86/vsyscall_emu/64: Dont use RET in vsyscall emulation Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 37/89] x86/sev: Avoid using __x86_return_thunk Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 38/89] x86: Use return-thunk in asm code Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 39/89] x86/entry: Avoid very early RET Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 40/89] objtool: Treat .text.__x86.* as noinstr Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 41/89] x86: Add magic AMD return-thunk Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 42/89] x86/bugs: Report AMD retbleed vulnerability Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 43/89] x86/bugs: Add AMD retbleed= boot parameter Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 44/89] x86/bugs: Enable STIBP for JMP2RET Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 45/89] x86/bugs: Keep a per-CPU IA32_SPEC_CTRL value Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 46/89] x86/entry: Add kernel IBRS implementation Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 47/89] x86/bugs: Optimize SPEC_CTRL MSR writes Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 48/89] x86/speculation: Add spectre_v2=ibrs option to support Kernel IBRS Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 49/89] x86/bugs: Split spectre_v2_select_mitigation() and spectre_v2_user_select_mitigation() Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 50/89] x86/bugs: Report Intel retbleed vulnerability Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 51/89] intel_idle: Disable IBRS during long idle Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 52/89] objtool: Update Retpoline validation Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 53/89] x86/xen: Rename SYS* entry points Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 54/89] x86/xen: Add UNTRAIN_RET Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 55/89] x86/bugs: Add retbleed=ibpb Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 56/89] x86/bugs: Do IBPB fallback check only once Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 57/89] objtool: Add entry UNRET validation Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 58/89] x86/cpu/amd: Add Spectral Chicken Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 59/89] x86/speculation: Fix RSB filling with CONFIG_RETPOLINE=n Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 60/89] x86/speculation: Fix firmware entry SPEC_CTRL handling Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 61/89] x86/speculation: Fix SPEC_CTRL write on SMT state change Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 62/89] x86/speculation: Use cached host SPEC_CTRL value for guest entry/exit Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 63/89] x86/speculation: Remove x86_spec_ctrl_mask Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 64/89] objtool: Re-add UNWIND_HINT_{SAVE_RESTORE} Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 65/89] KVM: VMX: Flatten __vmx_vcpu_run() Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 66/89] KVM: VMX: Convert launched argument to flags Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 67/89] KVM: VMX: Prevent guest RSB poisoning attacks with eIBRS Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 68/89] KVM: VMX: Fix IBRS handling after vmexit Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 69/89] x86/speculation: Fill RSB on vmexit for IBRS Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 70/89] x86/common: Stamp out the stepping madness Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 71/89] x86/cpu/amd: Enumerate BTC_NO Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 72/89] x86/retbleed: Add fine grained Kconfig knobs Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 73/89] x86/bugs: Add Cannon lake to RETBleed affected CPU list Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 74/89] x86/entry: Move PUSH_AND_CLEAR_REGS() back into error_entry Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 75/89] x86/bugs: Do not enable IBPB-on-entry when IBPB is not supported Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 76/89] x86/kexec: Disable RET on kexec Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 77/89] x86/speculation: Disable RRSBA behavior Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 78/89] x86/static_call: Serialize __static_call_fixup() properly Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 79/89] x86/xen: Fix initialisation in hypercall_page after rethunk Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 80/89] x86/asm/32: Fix ANNOTATE_UNRET_SAFE use on 32-bit Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 81/89] x86/speculation: Use DECLARE_PER_CPU for x86_spec_ctrl_current Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 82/89] efi/x86: use naked RET on mixed mode call wrapper Greg Kroah-Hartman
2022-07-22  9:11 ` Greg Kroah-Hartman [this message]
2022-07-22  9:11 ` [PATCH 5.15 84/89] KVM: emulate: do not adjust size of fastop and setcc subroutines Greg Kroah-Hartman
2022-07-22  9:11 ` [PATCH 5.15 85/89] tools arch x86: Sync the msr-index.h copy with the kernel sources Greg Kroah-Hartman
2022-07-22  9:12 ` [PATCH 5.15 86/89] tools headers cpufeatures: Sync " Greg Kroah-Hartman
2022-07-22  9:12 ` [PATCH 5.15 87/89] x86/bugs: Remove apostrophe typo Greg Kroah-Hartman
2022-07-22  9:12 ` [PATCH 5.15 88/89] um: Add missing apply_returns() Greg Kroah-Hartman
2022-07-22  9:12 ` [PATCH 5.15 89/89] x86: Use -mindirect-branch-cs-prefix for RETPOLINE builds Greg Kroah-Hartman
2022-07-22 12:14 ` [PATCH 5.15 00/89] 5.15.57-rc1 review Bagas Sanjaya
2022-07-22 17:58 ` Florian Fainelli
2022-07-22 19:36 ` Naresh Kamboju
2022-07-22 21:59 ` Guenter Roeck
2022-07-23  4:21 ` Ron Economos
2022-07-23  8:55 ` Sudip Mukherjee (Codethink)

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