Shakeel Butt 777a8560fd lib/buildid: use __kernel_read() for sleepable context ... Prevent a "BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio". For the sleepable context, convert freader to use __kernel_read() instead of direct page cache access via read_cache_folio(). This simplifies the faultable code path by using the standard kernel file reading interface which handles all the complexity of reading file data. At the moment we are not changing the code for non-sleepable context which uses filemap_get_folio() and only succeeds if the target folios are already in memory and up-to-date. The reason is to keep the patch simple and easier to backport to stable kernels. Syzbot repro does not crash the kernel anymore and the selftests run successfully. In the follow up we will make __kernel_read() with IOCB_NOWAIT work for non-sleepable contexts. In addition, I would like to replace the secretmem check with a more generic approach and will add fstest for the buildid code. Link: https://lkml.kernel.org/r/20251222205859.3968077-1-shakeel.butt@linux.dev Fixes: ad41251c29 ("lib/buildid: implement sleepable build_id_parse() API") Reported-by: syzbot+09b7d050e4806540153d@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=09b7d050e4806540153d Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev> Reviewed-by: Christoph Hellwig <hch@lst.de> Tested-by: Jinchao Wang <wangjinchao600@gmail.com> Link: https://lkml.kernel.org/r/aUteBPWPYzVWIZFH@ndev Reviewed-by: Christian Brauner <brauner@kernel.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Daniel Borkman <daniel@iogearbox.net> Cc: "Darrick J. Wong" <djwong@kernel.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2026-01-14 22:16:21 -08:00
..
842	lib: 842: Improve error handling in sw842_compress()	2025-02-09 18:08:11 +08:00
crc	lib/crc: Switch ARM and arm64 to 'ksimd' scoped guard API	2025-11-12 09:52:01 +01:00
crypto	lib/crypto: aes: Fix missing MMU protection for AES S-box	2026-01-08 11:14:59 -08:00
dim	…
fonts	lib/fonts: Add Terminus 10x18 console font	2025-12-02 19:57:01 +01:00
kunit	kunit: make FAULT_TEST default to n when PANIC_ON_OOPS	2025-12-15 09:27:19 -07:00
lz4	…
lzo	lib/lzo: add unlikely hints to overrun checks	2025-08-16 17:24:31 +08:00
math	lib: test_mul_u64_u64_div_u64(): test the 32bit code on 64bit	2025-11-20 14:03:42 -08:00
pldmfw	pldmfw: Don't require send_package_data or send_component_table to be defined	2025-05-15 12:59:18 +02:00
raid6	First set of RISC-V updates for v6.19-rc1	2025-12-05 16:26:57 -08:00
reed_solomon	treewide: Update email address	2026-01-11 06:09:11 -10:00
test_fortify	kbuild: require gcc-8 and binutils-2.30	2025-04-30 21:53:35 +02:00
tests	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
vdso	vdso: Gate VDSO_GETRANDOM behind HAVE_GENERIC_VDSO	2025-09-04 11:23:51 +02:00
xz	lib/xz: remove dead IA-64 (Itanium) support code	2025-11-12 10:00:15 -08:00
zlib_deflate	lib/zlib: drop EQUAL macro	2025-03-16 22:30:49 -07:00
zlib_dfltcc	…
zlib_inflate	zlib: add module description	2025-04-11 17:32:38 -07:00
zstd	Update zstd to the latest upstream release v1.5.7. Imported cleanly from the	2025-03-26 21:35:28 -07:00
.gitignore	…
Kconfig	standalone cache drivers for v6.19	2025-11-27 23:00:45 +01:00
Kconfig.debug	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
Kconfig.kasan	kasan: introduce ARCH_DEFER_KASAN and unify static key across modes	2025-09-21 14:21:58 -07:00
Kconfig.kcsan	objtool: Drop noinstr hack for KCSAN_WEAK_MEMORY	2025-08-28 16:58:46 -07:00
Kconfig.kfence	…
Kconfig.kgdb	…
Kconfig.kmsan	KMSAN: Restore dynamic check for '-fsanitize=kernel-memory'	2025-10-27 16:22:02 -07:00
Kconfig.ubsan	hardening fixes for v6.16-rc1 (take 2)	2025-06-01 11:37:01 -07:00
Makefile	standalone cache drivers for v6.19	2025-11-27 23:00:45 +01:00
alloc_tag.c	lib/alloc_tag: use %pe format specifier	2025-11-20 13:43:57 -08:00
argv_split.c	…
ashldi3.c	…
ashrdi3.c	…
asn1_decoder.c	ASN.1: add module description	2025-04-11 17:32:37 -07:00
asn1_encoder.c	…
assoc_array.c	…
atomic64.c	…
atomic64_test.c	x86/cpufeatures: Rename X86_CMPXCHG64 to X86_CX8	2025-02-28 11:42:34 +01:00
audit.c	…
base64.c	lib/base64: rework encode/decode for speed and stricter validation	2025-11-20 14:03:44 -08:00
bcd.c	…
bch.c	…
bitmap-str.c	…
bitmap.c	cpumask: Introduce cpumask_weighted_or()	2025-11-20 12:14:54 +01:00
bitrev.c	…
bootconfig-data.S	…
bootconfig.c	…
bsearch.c	…
btree.c	btree: simplify merge logic by using btree_last() return value	2025-09-13 17:32:53 -07:00
bucket_locks.c	…
bug.c	bug: Hush suggest-attribute=format for __warn_printf()	2025-12-12 10:26:26 +01:00
build_OID_registry	…
buildid.c	lib/buildid: use __kernel_read() for sleepable context	2026-01-14 22:16:21 -08:00
bust_spinlocks.c	…
cache_maint.c	lib: Support ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION	2025-11-21 18:42:01 +00:00
check_signature.c	…
checksum.c	…
closure.c	…
clz_ctz.c	bitops: Add __attribute_const__ to generic ffs()-family implementations	2025-09-08 14:58:50 -07:00
clz_tab.c	…
cmdline.c	…
cmpdi2.c	…
cmpxchg-emu.c	…
codetag.c	alloc_tag: add sequence number for module and iterator	2025-07-09 22:42:06 -07:00
compat_audit.c	…
cpu_rmap.c	net: move aRFS rmap management and CPU affinity to core	2025-02-26 19:51:37 -08:00
cpumask.c	cpumask: drop cpumask_next_wrap_old()	2025-02-24 16:37:23 -05:00
ctype.c	…
debug_info.c	…
debug_locks.c	…
debugobjects.c	treewide: Update email address	2026-01-11 06:09:11 -10:00
dec_and_lock.c	…
decompress.c	lib/decompress: use designated initializers for struct compress_format	2025-09-22 20:10:58 -07:00
decompress_bunzip2.c	…
decompress_inflate.c	…
decompress_unlz4.c	…
decompress_unlzma.c	…
decompress_unlzo.c	…
decompress_unxz.c	…
decompress_unzstd.c	…
devmem_is_allowed.c	…
devres.c	devres: Export devm_ioremap_resource_wc()	2025-05-05 16:18:09 -05:00
dhry.h	…
dhry_1.c	…
dhry_2.c	…
dhry_run.c	…
digsig.c	integrity-v6.18	2025-10-05 10:48:33 -07:00
dump_stack.c	panic/printk: replace this_cpu_in_panic() with panic_on_this_cpu()	2025-09-13 17:32:52 -07:00
dynamic_debug.c	dynamic_debug: add support for print stack	2025-11-12 10:00:16 -08:00
dynamic_queue_limits.c	dql: Fix dql->limit value when reset.	2025-03-25 06:26:55 -07:00
earlycpio.c	…
errname.c	…
error-inject.c	…
errseq.c	errseq: eliminate special limitation for macro MAX_ERRNO	2025-05-11 17:54:06 -07:00
extable.c	…
fault-inject-usercopy.c	lib/fault-inject-usercopy.c: use PTR_ERR_OR_ZERO() to simplify code	2025-09-13 17:32:46 -07:00
fault-inject.c	…
fdt.c	…
fdt_addresses.c	…
fdt_empty_tree.c	…
fdt_ro.c	…
fdt_rw.c	…
fdt_strerror.c	…
fdt_sw.c	…
fdt_wip.c	…
find_bit.c	bitmap: generalize node_random()	2025-07-08 19:11:57 -04:00
find_bit_benchmark.c	…
find_bit_benchmark_rust.rs	rust: add find_bit_benchmark_rust module.	2025-09-22 15:52:44 -04:00
flex_proportions.c	…
fw_table.c	…
genalloc.c	lib/genalloc: fix device leak in of_gen_pool_get()	2025-09-28 11:36:13 -07:00
generic-radix-tree.c	…
glob.c	…
globtest.c	…
group_cpus.c	lib/group_cpus: Let group_cpu_evenly() return the number of initialized masks	2025-07-01 10:24:11 -06:00
hexdump.c	…
hweight.c	bitops: Update kernel-doc in hweight.c to fix the issues with it	2025-11-06 11:51:04 -05:00
idr.c	idr: fix idr_alloc() returning an ID out of range	2025-12-23 11:23:11 -08:00
inflate.c	…
interval_tree.c	interval_tree: Fix ITSTATIC usage for *_subtree_search()	2025-10-14 14:45:22 -07:00
interval_tree_test.c	lib/interval_tree: add test case for span iteration	2025-03-17 12:17:01 -07:00
iomap.c	asm-generic/io.h: rework split ioread64/iowrite64 helpers	2025-03-01 21:00:22 +01:00
iomap_copy.c	…
iomem_copy.c	…
iommu-helper.c	…
iov_iter.c	iov_iter: Add missing speculation barrier to copy_from_user_iter()	2025-11-18 15:27:34 +01:00
irq_poll.c	…
irq_regs.c	…
is_single_threaded.c	…
kasprintf.c	…
kfifo.c	kfifo: add kfifo_alloc_node() helper for NUMA awareness	2025-11-28 09:20:13 -07:00
klist.c	…
kobject.c	…
kobject_uevent.c	uevent: mv uevent_helper into kobject_uevent.c	2025-07-23 11:56:02 +02:00
kstrtox.c	kstrtox: add support for enabled and disabled in kstrtobool()	2025-05-11 17:54:06 -07:00
kstrtox.h	…
linear_ranges.c	…
list_debug.c	…
list_sort.c	…
llist.c	llist: make llist_add_batch() a static inline	2025-05-27 19:40:34 -07:00
locking-selftest-hardirq.h	…
locking-selftest-mutex.h	…
locking-selftest-rlock-hardirq.h	…
locking-selftest-rlock-softirq.h	…
locking-selftest-rlock.h	…
locking-selftest-rsem.h	…
locking-selftest-rtmutex.h	…
locking-selftest-softirq.h	…
locking-selftest-spin-hardirq.h	…
locking-selftest-spin-softirq.h	…
locking-selftest-spin.h	…
locking-selftest-wlock-hardirq.h	…
locking-selftest-wlock-softirq.h	…
locking-selftest-wlock.h	…
locking-selftest-wsem.h	…
locking-selftest.c	treewide: Remove in_irq()	2025-10-24 21:39:27 +02:00
lockref.c	lockref: add a __cond_lock annotation for lockref_put_or_lock	2025-12-10 05:58:51 +09:00
logic_iomem.c	…
logic_pio.c	…
lru_cache.c	…
lshrdi3.c	…
lwq.c	…
maple_tree.c	maple_tree: fix tracepoint string pointers	2025-11-09 21:19:45 -08:00
memcat_p.c	…
memory-notifier-error-inject.c	…
memregion.c	…
memweight.c	…
min_heap.c	lib min_heap: use size_t for array size and index variables	2025-03-16 23:24:14 -07:00
muldi3.c	…
net_utils.c	net, treewide: define and use MAC_ADDR_STR_LEN	2025-03-19 19:17:58 +01:00
netdev-notifier-error-inject.c	…
nlattr.c	…
nmi_backtrace.c	…
notifier-error-inject.c	…
notifier-error-inject.h	…
objagg.c	…
objpool.c	…
of-reconfig-notifier-error-inject.c	…
oid_registry.c	lib/oid_registry.c: remove unused sprint_OID	2025-05-11 17:54:13 -07:00
once.c	…
packing.c	…
packing_test.c	…
parman.c	…
parser.c	…
percpu-refcount.c	…
percpu_counter.c	…
percpu_test.c	…
plist.c	treewide: Update email address	2026-01-11 06:09:11 -10:00
pm-notifier-error-inject.c	…
polynomial.c	…
radix-tree.c	…
radix-tree.h	…
random32.c	…
ratelimit.c	lib: ratelimit: fix spelling mistake 'seperately'	2025-11-20 14:03:45 -08:00
rbtree.c	rbtree: inline rb_last()	2025-11-27 14:24:30 -08:00
rbtree_test.c	lib/rbtree: add random seed	2025-03-17 12:17:00 -07:00
rcuref.c	rcuref: Plug slowpath race in rcuref_put()	2025-01-29 15:21:31 +01:00
ref_tracker.c	ref_tracker: remove redundant __GFP_NOWARN	2025-09-13 17:32:43 -07:00
refcount.c	…
rhashtable.c	mm/slub: allow to set node and align in k[v]realloc	2025-09-13 16:54:45 -07:00
sbitmap.c	lib/sbitmap: make sbitmap_get_shallow() internal	2025-08-07 06:30:17 -06:00
scatterlist.c	scatterlist: fix extraneous '@'-sign kernel-doc notation	2025-06-11 22:42:35 -07:00
seq_buf.c	…
sg_pool.c	…
sg_split.c	lib: scatterlist: fix sg_split_phys to preserve original scatterlist offsets	2025-04-01 15:20:46 -07:00
siphash.c	…
smp_processor_id.c	lib/smp_processor_id: Make migration check unconditional of SMP	2025-07-10 17:52:13 +02:00
sort.c	lib/sort.c: add _nonatomic() variants with cond_resched()	2025-04-01 15:20:46 -07:00
stackdepot.c	stackdepot: make max number of pools boot-time configurable	2025-08-02 12:01:38 -07:00
stmp_device.c	…
string.c	string: Add load_unaligned_zeropad() code path to sized_strscpy()	2025-04-15 13:50:17 -07:00
string_helpers.c	lib/string_helpers: Introduce parse_int_array()	2025-04-07 15:07:56 +01:00
strncpy_from_user.c	lib/strn*,uaccess: Use masked_user_{read/write}_access_begin when required	2025-11-18 15:27:35 +01:00
strnlen_user.c	lib/strn*,uaccess: Use masked_user_{read/write}_access_begin when required	2025-11-18 15:27:35 +01:00
sys_info.c	sys_info: add a default kernel sys_info mask	2025-11-20 14:03:43 -08:00
syscall.c	…
test-kstrtox.c	…
test_bitmap.c	bitmap: remove _check_eq_u32_array	2025-02-18 11:51:21 -05:00
test_bitops.c	…
test_bpf.c	…
test_debug_virtual.c	…
test_dynamic_debug.c	…
test_firmware.c	test_firmware: use str_true_false() helper	2025-09-13 17:32:46 -07:00
test_fpu.h	…
test_fpu_glue.c	…
test_fpu_impl.c	…
test_free_pages.c	…
test_hexdump.c	…
test_hmm.c	mm/hmm/test: fix error handling in dmirror_device_init	2025-11-24 15:08:50 -08:00
test_hmm_uapi.h	lib/test_hmm: add large page allocation failure testing	2025-11-24 15:08:48 -08:00
test_ida.c	ida: Add ida_find_first_range()	2025-03-25 10:18:31 -03:00
test_kho.c	test_kho: always print restore status	2025-11-27 14:24:42 -08:00
test_kmod.c	lib/test_kmod: do not hardcode/depend on any filesystem	2025-05-11 17:54:09 -07:00
test_lockup.c	…
test_maple_tree.c	Summary of significant series in this pull request:	2025-10-02 18:18:33 -07:00
test_memcat_p.c	…
test_meminit.c	…
test_min_heap.c	…
test_module.c	…
test_objagg.c	lib: test_objagg: split test_hints_case() into two functions	2025-07-09 22:57:55 -07:00
test_objpool.c	lib: test_objpool: Avoid direct access to hrtimer clockbase	2025-09-09 12:27:18 +02:00
test_parman.c	…
test_ref_tracker.c	ref_tracker: eliminate the ref_tracker_dir name field	2025-06-19 17:02:04 -07:00
test_rhashtable.c	…
test_static_key_base.c	…
test_static_keys.c	…
test_sysctl.c	sysctl: Close test ctl_headers with a for loop	2025-04-14 14:13:41 +02:00
test_ubsan.c	ubsan: Fix panic from test_ubsan_out_of_bounds	2025-04-15 13:50:17 -07:00
test_uuid.c	…
test_vmalloc.c	lib/test_vmalloc: remove xfail condition check	2025-11-16 17:27:53 -08:00
test_xarray.c	xarray: make xa_alloc_cyclic() return 0 on all success cases	2025-05-11 17:48:19 -07:00
textsearch.c	…
timerqueue.c	…
trace_readwrite.c	…
ts_bm.c	…
ts_fsm.c	…
ts_kmp.c	…
ubsan.c	ubsan: Fix incorrect hand-side used in handle	2025-08-25 06:11:06 -07:00
ubsan.h	ubsan/overflow: Rework integer overflow sanitizer option to turn on everything	2025-03-07 19:58:05 -08:00
ucmpdi2.c	…
ucs2_string.c	ucs2_string: add module description	2025-04-11 17:32:38 -07:00
union_find.c	…
usercopy.c	uaccess: decouple INLINE_COPY_FROM_USER and CONFIG_RUST	2025-11-12 10:00:16 -08:00
uuid.c	…
vsprintf.c	Merge branch 'for-6.19-vsprintf-timespec64' into for-linus	2025-12-01 14:14:34 +01:00
win_minmax.c	…
xarray.c	xarray: remove redundant __GFP_NOWARN	2025-09-13 16:54:46 -07:00
xxhash.c	lib/xxhash: remove more unused xxh functions	2025-11-12 10:00:17 -08:00