ci starts bisection 2023-06-10 06:48:01.784909837 +0000 UTC m=+249794.073336719 bisecting cause commit starting from e7c5433c5aaab52ddd5448967a9a5db94a3939cc building syzkaller on 7086cdb95114c57c35cee9db87b80d4225d8795d ensuring issue is reproducible on original commit e7c5433c5aaab52ddd5448967a9a5db94a3939cc testing commit e7c5433c5aaab52ddd5448967a9a5db94a3939cc gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: ca3ccc7d56458a78780faa6ce935d05d16b1aa8fe55a05fef132586aaaf88458 all runs: crashed: KASAN: slab-out-of-bounds Read in extract_iter_to_sg testing release v6.3 testing commit 457391b0380335d5e9a5babdec90ac53928b23b4 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 482515dd6c0795f4919f3052888a1a53cb0d896962b2b46e86a702b5b5e5e109 all runs: OK # git bisect start e7c5433c5aaab52ddd5448967a9a5db94a3939cc 457391b0380335d5e9a5babdec90ac53928b23b4 Bisecting: 8059 revisions left to test after this (roughly 13 steps) [cb6fe2ceb667eb78f252d473b03deb23999ab1cf] Merge tag 'devicetree-for-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux testing commit cb6fe2ceb667eb78f252d473b03deb23999ab1cf gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: d3a2fd4cbe410621dc2cce22be838ac13f3f7c5abfd179ac67037b9868912696 all runs: OK # git bisect good cb6fe2ceb667eb78f252d473b03deb23999ab1cf Bisecting: 4031 revisions left to test after this (roughly 12 steps) [26c009dffca89b0f8fe7facc41d1ccf88a66825a] Merge tag '6.4-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6 testing commit 26c009dffca89b0f8fe7facc41d1ccf88a66825a gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e2023cc8708be6d2742e9634c9048f4cdeac2e090a128f4539253a3103b9bb6c all runs: OK # git bisect good 26c009dffca89b0f8fe7facc41d1ccf88a66825a Bisecting: 2015 revisions left to test after this (roughly 11 steps) [cba582631ee40772c6dbe24e945b9173572dfca0] Merge tag 'tpmdd-v6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd testing commit cba582631ee40772c6dbe24e945b9173572dfca0 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 49f404dbd0e00dc5f590051e7bfd79665b6675eb58c6f86ac9b93a493c8bcf26 all runs: OK # git bisect good cba582631ee40772c6dbe24e945b9173572dfca0 Bisecting: 1006 revisions left to test after this (roughly 10 steps) [9455b4b6db1e9b11d242595cc968332ecdd3cc91] Merge tag 'powerpc-6.4-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux testing commit 9455b4b6db1e9b11d242595cc968332ecdd3cc91 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 91d783972b37345de98624a9adbd342446dfbd8234cbfd05e32ec603780ccbc9 all runs: OK # git bisect good 9455b4b6db1e9b11d242595cc968332ecdd3cc91 Bisecting: 503 revisions left to test after this (roughly 9 steps) [ca33db4a86023f1158dc2b3587ca3c90d2a0705e] net: phy: microchip_t1s: modify driver description to be more generic testing commit ca33db4a86023f1158dc2b3587ca3c90d2a0705e gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 6a96fc89f00a6347cc4fc235050e247960efb4205836b56211d5d54ef6589585 all runs: OK # git bisect good ca33db4a86023f1158dc2b3587ca3c90d2a0705e Bisecting: 278 revisions left to test after this (roughly 8 steps) [25041a4c02c7cf774d8b6ed60586fd64f1cdaa81] Merge tag 'net-6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net testing commit 25041a4c02c7cf774d8b6ed60586fd64f1cdaa81 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 09ad2f7f9f1f8adc3e00b71b6ebd59c5cffb6c375e582f8e5a52953e89439eb4 all runs: OK # git bisect good 25041a4c02c7cf774d8b6ed60586fd64f1cdaa81 Bisecting: 143 revisions left to test after this (roughly 7 steps) [c422ac94e6daa3607319a08be89f133cb48aa42b] Merge branch 'drm-i915-use-ref_tracker-library-for-tracking-wakerefs' testing commit c422ac94e6daa3607319a08be89f133cb48aa42b gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 7540d29dac736de752f614a9be14e38338f5080e58139f72ddda53229f82e2dc all runs: OK # git bisect good c422ac94e6daa3607319a08be89f133cb48aa42b Bisecting: 71 revisions left to test after this (roughly 6 steps) [fb800fa4c1f5aee1238267252e88a7837e645c02] crypto: af_alg: Convert af_alg_sendpage() to use MSG_SPLICE_PAGES testing commit fb800fa4c1f5aee1238267252e88a7837e645c02 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 2aeb97348b5f0d4f0705d4e82ae173b3418fddaef350ebf302c62cc089076124 all runs: OK # git bisect good fb800fa4c1f5aee1238267252e88a7837e645c02 Bisecting: 41 revisions left to test after this (roughly 5 steps) [55b24334c0f2db55ca059848121939f59133bdb6] ethtool: ioctl: improve error checking for set_wol testing commit 55b24334c0f2db55ca059848121939f59133bdb6 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f3c7a38b6aef91135c5be517ef3fd99d15b7e19ad824cc13d3959545fa0c168e all runs: OK # git bisect good 55b24334c0f2db55ca059848121939f59133bdb6 Bisecting: 20 revisions left to test after this (roughly 4 steps) [df720d288dbb1793e82b6ccbfc670ec871e9def4] tls/sw: Use splice_eof() to flush testing commit df720d288dbb1793e82b6ccbfc670ec871e9def4 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: d42022b62ba3c37c13ae1bd0db025d9152d50f6f00080f0809231cc30285d041 all runs: crashed: KASAN: slab-out-of-bounds Read in extract_iter_to_sg # git bisect bad df720d288dbb1793e82b6ccbfc670ec871e9def4 Bisecting: 10 revisions left to test after this (roughly 3 steps) [f4692ab13a1f7ad2c2098b838c2820c113ce8a07] net/mlx5e: Remove RX page cache leftovers testing commit f4692ab13a1f7ad2c2098b838c2820c113ce8a07 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 1e5d3045d9c008da840ce7c6330bb38020440e5fde9faab211fd0488c726625a all runs: OK # git bisect good f4692ab13a1f7ad2c2098b838c2820c113ce8a07 Bisecting: 5 revisions left to test after this (roughly 3 steps) [f84ad5cffd889226e820a727211c0d0264fe7f34] Merge tag 'mlx5-updates-2023-06-06' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux testing commit f84ad5cffd889226e820a727211c0d0264fe7f34 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: b6c3157fdb0c0eb56c67069748b45b10287fb8b937404a6b791ba81b8383512c all runs: OK # git bisect good f84ad5cffd889226e820a727211c0d0264fe7f34 Bisecting: 2 revisions left to test after this (roughly 2 steps) [81840b3b91aad06053ad2712f3da5d0448eeb0e8] tls: Allow MSG_SPLICE_PAGES but treat it as normal sendmsg testing commit 81840b3b91aad06053ad2712f3da5d0448eeb0e8 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 322a8aca169bc9251d07629c2142f079d516bdc7f320cca9e59f8aa2228e9213 all runs: OK # git bisect good 81840b3b91aad06053ad2712f3da5d0448eeb0e8 Bisecting: 0 revisions left to test after this (roughly 1 step) [2bfc66850952b6921b2033b09729ec59eabbc81d] splice, net: Add a splice_eof op to file-ops and socket-ops testing commit 2bfc66850952b6921b2033b09729ec59eabbc81d gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 42205f16717f0f1739bfd06eed7c548be16dcac3476bd125bb6524e96928d561 all runs: crashed: KASAN: slab-out-of-bounds Read in extract_iter_to_sg # git bisect bad 2bfc66850952b6921b2033b09729ec59eabbc81d Bisecting: 0 revisions left to test after this (roughly 0 steps) [2dc334f1a63a8839b88483a3e73c0f27c9c1791c] splice, net: Use sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage() testing commit 2dc334f1a63a8839b88483a3e73c0f27c9c1791c gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 86ab8e6cbd2d7793193acedb895fa6b0a22a81b853315cb29050d2d8fc361986 all runs: crashed: KASAN: slab-out-of-bounds Read in extract_iter_to_sg # git bisect bad 2dc334f1a63a8839b88483a3e73c0f27c9c1791c 2dc334f1a63a8839b88483a3e73c0f27c9c1791c is the first bad commit commit 2dc334f1a63a8839b88483a3e73c0f27c9c1791c Author: David Howells Date: Wed Jun 7 19:19:09 2023 +0100 splice, net: Use sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage() Replace generic_splice_sendpage() + splice_from_pipe + pipe_to_sendpage() with a net-specific handler, splice_to_socket(), that calls sendmsg() with MSG_SPLICE_PAGES set instead of calling ->sendpage(). MSG_MORE is used to indicate if the sendmsg() is expected to be followed with more data. This allows multiple pipe-buffer pages to be passed in a single call in a BVEC iterator, allowing the processing to be pushed down to a loop in the protocol driver. This helps pave the way for passing multipage folios down too. Protocols that haven't been converted to handle MSG_SPLICE_PAGES yet should just ignore it and do a normal sendmsg() for now - although that may be a bit slower as it may copy everything. Signed-off-by: David Howells Reviewed-by: Jakub Kicinski cc: Jens Axboe cc: Matthew Wilcox Signed-off-by: Jakub Kicinski fs/splice.c | 158 +++++++++++++++++++++++++++++++++++++++---------- include/linux/fs.h | 2 - include/linux/splice.h | 2 + net/socket.c | 26 +------- 4 files changed, 131 insertions(+), 57 deletions(-) culprit signature: 86ab8e6cbd2d7793193acedb895fa6b0a22a81b853315cb29050d2d8fc361986 parent signature: 322a8aca169bc9251d07629c2142f079d516bdc7f320cca9e59f8aa2228e9213 revisions tested: 17, total time: 5h24m3.905136481s (build: 2h38m41.148058076s, test: 2h42m20.633679735s) first bad commit: 2dc334f1a63a8839b88483a3e73c0f27c9c1791c splice, net: Use sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage() recipients (to): ["dhowells@redhat.com" "kuba@kernel.org"] recipients (cc): [] crash: KASAN: slab-out-of-bounds Read in extract_iter_to_sg ================================================================== BUG: KASAN: slab-out-of-bounds in sg_assign_page include/linux/scatterlist.h:109 [inline] BUG: KASAN: slab-out-of-bounds in sg_set_page include/linux/scatterlist.h:139 [inline] BUG: KASAN: slab-out-of-bounds in extract_bvec_to_sg lib/scatterlist.c:1183 [inline] BUG: KASAN: slab-out-of-bounds in extract_iter_to_sg lib/scatterlist.c:1352 [inline] BUG: KASAN: slab-out-of-bounds in extract_iter_to_sg+0x1323/0x1650 lib/scatterlist.c:1339 Read of size 8 at addr ffff88802a696ff8 by task syz-executor.0/5516 CPU: 1 PID: 5516 Comm: syz-executor.0 Not tainted 6.4.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x64/0xb0 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 sg_assign_page include/linux/scatterlist.h:109 [inline] sg_set_page include/linux/scatterlist.h:139 [inline] extract_bvec_to_sg lib/scatterlist.c:1183 [inline] extract_iter_to_sg lib/scatterlist.c:1352 [inline] extract_iter_to_sg+0x1323/0x1650 lib/scatterlist.c:1339 af_alg_sendmsg+0x146c/0x2480 crypto/af_alg.c:1045 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg+0xc0/0x150 net/socket.c:745 splice_to_socket+0x738/0xd70 fs/splice.c:917 do_splice_from fs/splice.c:969 [inline] direct_splice_actor+0xff/0x1d0 fs/splice.c:1135 splice_direct_to_actor+0x2bf/0x790 fs/splice.c:1090 do_splice_direct+0x14c/0x260 fs/splice.c:1178 do_sendfile+0x93d/0x1170 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1316 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x11e/0x1d0 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5ff388c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5ff451f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f5ff39ac120 RCX: 00007f5ff388c169 RDX: 0000000020000180 RSI: 0000000000000003 RDI: 0000000000000005 RBP: 00007f5ff38e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff844034df R14: 00007f5ff451f300 R15: 0000000000022000 Allocated by task 5516: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0x5e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] sock_kmalloc+0x8a/0xd0 net/core/sock.c:2630 af_alg_alloc_tsgl crypto/af_alg.c:614 [inline] af_alg_sendmsg+0x1395/0x2480 crypto/af_alg.c:1028 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg+0xc0/0x150 net/socket.c:745 splice_to_socket+0x738/0xd70 fs/splice.c:917 do_splice_from fs/splice.c:969 [inline] direct_splice_actor+0xff/0x1d0 fs/splice.c:1135 splice_direct_to_actor+0x2bf/0x790 fs/splice.c:1090 do_splice_direct+0x14c/0x260 fs/splice.c:1178 do_sendfile+0x93d/0x1170 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1316 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x11e/0x1d0 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88802a696000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 0 bytes to the right of allocated 4088-byte region [ffff88802a696000, ffff88802a696ff8) The buggy address belongs to the physical page: page:ffffea0000a9a400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2a690 head:ffffea0000a9a400 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888011442140 ffffea0000aba600 dead000000000002 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4673, tgid 4673 (dhcpcd), ts 28200911031, free_ts 28191262479 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3192 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291 __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] tomoyo_realpath_from_path+0xa8/0x660 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x23f/0x2e0 security/tomoyo/file.c:771 security_file_open+0x38/0x80 security/security.c:2797 do_dentry_open+0x33e/0x1140 fs/open.c:907 do_open fs/namei.c:3636 [inline] path_openat+0x12a5/0x2280 fs/namei.c:3791 do_filp_open+0x1a9/0x3e0 fs/namei.c:3818 do_sys_openat2+0x11e/0x3f0 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x11f/0x1d0 fs/open.c:1383 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2564 free_unref_page+0x33/0x370 mm/page_alloc.c:2659 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2636 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3451 [inline] slab_alloc mm/slub.c:3459 [inline] __kmem_cache_alloc_lru mm/slub.c:3466 [inline] kmem_cache_alloc+0x17c/0x3b0 mm/slub.c:3475 getname_flags.part.0+0x4a/0x440 fs/namei.c:140 vfs_fstatat+0x39/0x70 fs/stat.c:275 __do_sys_newfstatat+0x6b/0xc0 fs/stat.c:446 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88802a696e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88802a696f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88802a696f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ^ ffff88802a697000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802a697080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================