kernel/linux.git/crypto/scompress.c, branch v6.19.11

crypto: remove nth_page() usage within SG entry

2025-09-21T21:22:09+00:00

It's no longer required to use nth_page() when iterating pages within a single SG entry, so let's drop the nth_page() usage. Link: https://lkml.kernel.org/r/20250901150359.867252-34-david@redhat.com Signed-off-by: David Hildenbrand Reviewed-by: Lorenzo Stoakes Acked-by: Herbert Xu Cc: "David S. Miller" Signed-off-by: Andrew Morton

crypto: api - Rename CRYPTO_ALG_REQ_CHAIN to CRYPTO_ALG_REQ_VIRT

2025-05-05T10:20:45+00:00

As chaining has been removed, all that remains of REQ_CHAIN is just virtual address support. Rename it before the reintroduction of batching creates confusion. Signed-off-by: Herbert Xu

Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2025-04-25T02:37:30+00:00

Merge crypto tree to pick up the scompress scratch refcount fix. The merge resolution is slightly non-trivial as the context has shifted.

crypto: scompress - increment scomp_scratch_users when already allocated

2025-04-25T02:33:30+00:00

Commit ddd0a42671c0 only increments scomp_scratch_users when it was 0, causing a panic when using ipcomp: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 619 Comm: ping Tainted: G N 6.15.0-rc3-net-00032-ga79be02bba5c #41 PREEMPT(full) Tainted: [N]=TEST Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 RIP: 0010:inflate_fast+0x5a2/0x1b90 [...] Call Trace: zlib_inflate+0x2d60/0x6620 deflate_sdecompress+0x166/0x350 scomp_acomp_comp_decomp+0x45f/0xa10 scomp_acomp_decompress+0x21/0x120 acomp_do_req_chain+0x3e5/0x4e0 ipcomp_input+0x212/0x550 xfrm_input+0x2de2/0x72f0 [...] Kernel panic - not syncing: Fatal exception in interrupt Kernel Offset: disabled ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]--- Instead, let's keep the old increment, and decrement back to 0 if the scratch allocation fails. Fixes: ddd0a42671c0 ("crypto: scompress - Fix scratch allocation failure handling") Signed-off-by: Sabrina Dubroca Signed-off-by: Herbert Xu

Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2025-04-23T01:36:39+00:00

Merge crypto tree to pick up scompress off-by-one patch. The merge resolution is non-trivial as the dst handling code has been moved in front of the src.

crypto: scomp - Fix off-by-one bug when calculating last page

2025-04-23T01:32:57+00:00

Fix off-by-one bug in the last page calculation for src and dst. Reported-by: Nhat Pham Fixes: 2d3553ecb4e3 ("crypto: scomp - Remove support for some non-trivial SG lists") Signed-off-by: Herbert Xu

crypto: api - Add support for duplicating algorithms before registration

2025-04-16T07:36:24+00:00

If the bit CRYPTO_ALG_DUP_FIRST is set, an algorithm will be duplicated by kmemdup before registration. This is inteded for hardware-based algorithms that may be unplugged at will. Do not use this if the algorithm data structure is embedded in a bigger data structure. Perform the duplication in the driver instead. Signed-off-by: Herbert Xu

crypto: acomp - Simplify folio handling

2025-04-16T07:16:21+00:00

Rather than storing the folio as is and handling it later, convert it to a scatterlist right away. Signed-off-by: Herbert Xu

crypto: acomp - Remove request chaining

2025-04-16T07:16:20+00:00

Request chaining requires the user to do too much book keeping. Remove it from acomp. Signed-off-by: Herbert Xu

crypto: scomp - Fix wild memory accesses in scomp_free_streams

2025-04-12T01:33:09+00:00

In order to use scomp_free_streams to free the partially allocted streams in the allocation error path, move the alg->stream assignment to the beginning. Also check for error pointers in scomp_free_streams before freeing the ctx. Finally set alg->stream to NULL to not break subsequent attempts to allocate the streams. Fixes: 3d72ad46a23a ("crypto: acomp - Move stream management into scomp layer") Reported-by: syzkaller Co-developed-by: Kuniyuki Iwashima Signed-off-by: Kuniyuki Iwashima Co-developed-by: Herbert Xu Signed-off-by: Herbert Xu