FAT-fs (loop4): Directory bread(block 128) failed IPVS: length: 39 != 8 FAT-fs (loop5): Directory bread(block 132) failed ================================================================== FAT-fs (loop4): Directory bread(block 129) failed BUG: KASAN: slab-out-of-bounds in put_unaligned_be32 include/linux/unaligned/access_ok.h:60 [inline] BUG: KASAN: slab-out-of-bounds in sha1_base_finish include/crypto/sha1_base.h:102 [inline] BUG: KASAN: slab-out-of-bounds in sha1_final+0x283/0x2e0 crypto/sha1_generic.c:58 Write of size 4 at addr ffff8801d7846018 by task syz-executor2/22993 CPU: 0 PID: 22993 Comm: syz-executor2 Not tainted 4.18.0-rc2+ #117 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 FAT-fs (loop5): Directory bread(block 133) failed Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 FAT-fs (loop4): Directory bread(block 130) failed print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 __asan_report_store4_noabort+0x17/0x20 mm/kasan/report.c:437 FAT-fs (loop5): Directory bread(block 134) failed put_unaligned_be32 include/linux/unaligned/access_ok.h:60 [inline] sha1_base_finish include/crypto/sha1_base.h:102 [inline] sha1_final+0x283/0x2e0 crypto/sha1_generic.c:58 crypto_shash_final+0x104/0x260 crypto/shash.c:152 kdf_ctr security/keys/dh.c:186 [inline] keyctl_dh_compute_kdf security/keys/dh.c:217 [inline] __keyctl_dh_compute+0x1198/0x1be0 security/keys/dh.c:389 FAT-fs (loop4): Directory bread(block 131) failed FAT-fs (loop5): Directory bread(block 135) failed FAT-fs (loop4): Directory bread(block 132) failed keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:425 __do_sys_keyctl security/keys/keyctl.c:1741 [inline] __se_sys_keyctl security/keys/keyctl.c:1637 [inline] __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637 FAT-fs (loop5): Directory bread(block 136) failed do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 FAT-fs (loop4): Directory bread(block 133) failed entry_SYSCALL_64_after_hwframe+0x49/0xbe FAT-fs (loop4): Directory bread(block 134) failed RIP: 0033:0x455a99 Code: 1d ba fb ff c3 66 2e 0f FAT-fs (loop5): Directory bread(block 137) failed 1f 84 00 00 00 00 00 66 90 48 89 FAT-fs (loop4): Directory bread(block 135) failed f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 FAT-fs (loop4): Directory bread(block 136) failed 4d 89 c8 4c 8b 4c 24 08 0f FAT-fs (loop4): Directory bread(block 137) failed 05 <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f130dcb2c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007f130dcb36d4 RCX: 0000000000455a99 RDX: 0000000020000300 RSI: 0000000020000100 RDI: 0000000000000017 RBP: 000000000072bea0 R08: 0000000020000140 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bfd68 R14: 00000000004cefb8 R15: 0000000000000000 Allocated by task 22993: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc mm/slab.c:3718 [inline] __kmalloc+0x14e/0x760 mm/slab.c:3727 kmalloc include/linux/slab.h:518 [inline] keyctl_dh_compute_kdf security/keys/dh.c:211 [inline] __keyctl_dh_compute+0x1000/0x1be0 security/keys/dh.c:389 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:425 __do_sys_keyctl security/keys/keyctl.c:1741 [inline] __se_sys_keyctl security/keys/keyctl.c:1637 [inline] __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 2416: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x260 mm/slab.c:3813 kernfs_fop_write+0x18c/0x480 fs/kernfs/file.c:330 __vfs_write+0x117/0x9f0 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801d7846000 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 24 bytes inside of 32-byte region [ffff8801d7846000, ffff8801d7846020) The buggy address belongs to the page: page:ffffea00075e1180 count:1 mapcount:0 mapping:ffff8801da8001c0 index:0xffff8801d7846fc1 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0007375488 ffffea00075d7908 ffff8801da8001c0 raw: ffff8801d7846fc1 ffff8801d7846000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d7845f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801d7845f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801d7846000: 00 00 00 fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff8801d7846080: fb fb fb fb fc fc fc fc 06 fc fc fc fc fc fc fc ffff8801d7846100: 00 fc fc fc fc fc fc fc 04 fc fc fc fc fc fc fc ==================================================================