Puranjay Mohan 7a433e5193 bpf: Support negative offsets, BPF_SUB, and alu32 for linked register tracking ... Previously, the verifier only tracked positive constant deltas between linked registers using BPF_ADD. This limitation meant patterns like: r1 = r0; r1 += -4; if r1 s>= 0 goto l0_%=; // r1 >= 0 implies r0 >= 4 // verifier couldn't propagate bounds back to r0 if r0 != 0 goto l0_%=; r0 /= 0; // Verifier thinks this is reachable l0_%=: Similar limitation exists for 32-bit registers. With this change, the verifier can now track negative deltas in reg->off enabling bound propagation for the above pattern. For alu32, we make sure the destination register has the upper 32 bits as 0s before creating the link. BPF_ADD_CONST is split into BPF_ADD_CONST64 and BPF_ADD_CONST32, the latter is used in case of alu32 and sync_linked_regs uses this to zext the result if known_reg has this flag. Signed-off-by: Puranjay Mohan <puranjay@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20260204151741.2678118-2-puranjay@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2026-02-04 13:35:28 -08:00
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acct	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
alsa	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
amd-pstate	…
arm64	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
bpf	bpf: Support negative offsets, BPF_SUB, and alu32 for linked register tracking	2026-02-04 13:35:28 -08:00
breakpoints	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
cachestat	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
capabilities	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
cgroup	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
clone3	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
connector	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
core	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
coredump	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
cpu-hotplug	…
cpufreq	…
damon	selftests/damon/sysfs.py: merge DAMON status dumping into commitment assertion	2025-11-20 13:44:01 -08:00
devices	…
dmabuf-heaps	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
drivers	selftests: netdevsim: add carrier state consistency test	2026-01-06 18:04:01 -08:00
dt	…
efivarfs	…
exec	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
fchmodat2	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
filelock	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
filesystems	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
firmware	…
fpu	…
ftrace	selftests/tracing: Fix test_multiple_writes stall	2026-01-09 15:49:32 -07:00
futex	Futex changes for v6.19:	2025-12-10 17:21:30 +09:00
gpio	…
hid	HID: Use bpf_wq_set_callback kernel function	2026-01-20 16:15:57 -08:00
ia64	…
intel_pstate	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
iommu	iommufd/selftest: Make it clearer to gcc that the access is not out of bounds	2025-12-15 20:34:41 -04:00
ipc	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
ir	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
kcmp	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
kexec	selftests/kexec: Ignore selftest binary	2025-09-25 13:43:28 -06:00
kho	kho: make debugfs interface optional	2025-11-27 14:24:31 -08:00
kmod	…
kselftest	selftests/run_kselftest.sh: exit with error if tests fail	2025-11-19 15:00:22 -07:00
kselftest_harness	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
kvm	selftests: kvm: Verify TILELOADD actually #NM faults when XFD[18]=1	2026-01-10 07:17:30 +01:00
landlock	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
lib	…
livepatch	selftests: livepatch: use canonical ftrace path	2025-10-15 14:50:46 +02:00
liveupdate	selftests/liveupdate: add kexec test for multiple and empty sessions	2025-11-27 14:24:42 -08:00
lkdtm	lkdtm/bugs: Add cases for BUG and PANIC occurring in hardirq context	2025-12-15 12:05:37 +00:00
locking	…
lsm	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
media_tests	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
membarrier	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
memfd	…
memory-hotplug	…
mincore	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
mm	selftests/mm: fix thread state check in uffd-unit-tests	2025-12-23 11:23:14 -08:00
module	…
mount	…
mount_setattr	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
move_mount_set_group	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
mqueue	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
mseal_system_mappings	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
namespaces	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
nci	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
net	selftests: drv-net: Bring back tool() to driver __init__s	2026-01-06 17:52:08 -08:00
nolibc	nolibc changes for v6.19	2025-12-03 09:23:25 -08:00
ntb	…
openat2	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
pci_endpoint	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
pcie_bwctrl	…
perf_events	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
pid_namespace	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
pidfd	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
power_supply	…
powerpc	selftests/powerpc/pmu/: Add check_extended_reg_test to .gitignore	2025-12-22 17:55:07 +05:30
prctl	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
proc	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
pstore	…
ptp	…
ptrace	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
rcutorture	Merge branch 'rcu/misc' into next	2025-11-30 22:20:33 +01:00
resctrl	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
ring-buffer	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
riscv	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
rlimits	…
rseq	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
rtc	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
rust	…
safesetid	…
sched	…
sched_ext	selftests/sched_ext: flush stdout before test to avoid log spam	2025-12-12 08:18:32 -10:00
seccomp	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
sgx	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
signal	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
size	…
sparc64	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
splice	…
static_keys	…
sync	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
syscall_user_dispatch	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
sysctl	…
tc-testing	selftests/tc-testing: Add test case redirecting to self on egress	2026-01-05 16:23:43 -08:00
tdx	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
thermal/intel	…
timens	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
timers	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
tmpfs	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
tpm2	selftests: tpm2: Fix ill defined assertions	2025-12-03 22:55:27 +02:00
tty	TTY/Serial changes for 6.19-rc1	2025-12-06 18:38:19 -08:00
turbostat	…
ublk	selftests/ublk: fix Makefile to rebuild on header changes	2025-12-28 09:25:26 -07:00
uevent	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
user_events	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
vDSO	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
verification	selftests/verification: Add initial RV tests	2025-11-11 13:18:55 +01:00
vfio	vfio: selftests: Drop <uapi/linux/types.h> includes	2025-12-23 14:17:13 -07:00
vsock	selftests/vsock: disable shellcheck SC2317 and SC2119	2025-11-12 06:19:40 -08:00
watchdog	…
wireguard	hung_task: panic when there are more than N hung tasks at the same time	2025-11-12 10:00:14 -08:00
x86	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
zram	mm: remove unused zpool layer	2025-09-21 14:21:59 -07:00
.gitignore	…
Makefile	selftests/liveupdate: add userspace API selftests	2025-11-27 14:24:41 -08:00
gen_kselftest_tar.sh	…
kselftest.h	Summary of significant series in this pull request:	2025-10-02 18:18:33 -07:00
kselftest_deps.sh	…
kselftest_harness.h	kselftest/harness: Use helper to avoid zero-size memset warning	2025-12-31 13:27:36 -07:00
kselftest_install.sh	…
kselftest_module.h	…
lib.mk	selftests: complete kselftest include centralization	2025-11-27 14:24:31 -08:00
run_kselftest.sh	selftests/run_kselftest.sh: exit with error if tests fail	2025-11-19 15:00:22 -07:00