dup_mmap kernel/fork.c:475 [inline] dup_mm kernel/fork.c:1243 [inline] copy_mm kernel/fork.c:1297 [inline] copy_process.part.39+0x4fed/0x7220 kernel/fork.c:1803 Unknown ioctl 1079006226 ================================================================== BUG: KASAN: slab-out-of-bounds in put_unaligned_le64 include/linux/unaligned/access_ok.h:50 [inline] BUG: KASAN: slab-out-of-bounds in crypto_sha3_final+0xefa/0x10a0 crypto/sha3_generic.c:235 Write of size 8 at addr ffff8801bc21d69c by task syz-executor5/11140 copy_process kernel/fork.c:1616 [inline] _do_fork+0x291/0x12a0 kernel/fork.c:2099 __do_compat_sys_x86_clone arch/x86/ia32/sys_ia32.c:240 [inline] __se_compat_sys_x86_clone arch/x86/ia32/sys_ia32.c:236 [inline] __ia32_compat_sys_x86_clone+0xbc/0x140 arch/x86/ia32/sys_ia32.c:236 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fa5cb9 Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5fa10ac EFLAGS: 00000282 ORIG_RAX: 0000000000000078 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000200007c0 RDX: 0000000020000040 RSI: 0000000020000000 RDI: 0000000020000300 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 CPU: 0 PID: 11140 Comm: syz-executor5 Not tainted 4.18.0-rc2+ #20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 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_store8_noabort+0x17/0x20 mm/kasan/report.c:438 put_unaligned_le64 include/linux/unaligned/access_ok.h:50 [inline] crypto_sha3_final+0xefa/0x10a0 crypto/sha3_generic.c:235 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 compat_keyctl_dh_compute+0x2d0/0x400 security/keys/compat_dh.c:39 __do_compat_sys_keyctl security/keys/compat.c:136 [inline] __se_compat_sys_keyctl security/keys/compat.c:59 [inline] __ia32_compat_sys_keyctl+0x137/0x3b0 security/keys/compat.c:59 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff0cb9 Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5fec0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000120 RAX: ffffffffffffffda RBX: 0000000000000017 RCX: 00000000200003c0 RDX: 00000000200004c0 RSI: 000000000000009b RDI: 0000000020000600 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 11140: 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 compat_keyctl_dh_compute+0x2d0/0x400 security/keys/compat_dh.c:39 __do_compat_sys_keyctl security/keys/compat.c:136 [inline] __se_compat_sys_keyctl security/keys/compat.c:59 [inline] __ia32_compat_sys_keyctl+0x137/0x3b0 security/keys/compat.c:59 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Freed by task 6618: 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 free_kthread_struct+0xc7/0xf0 kernel/kthread.c:88 free_task+0x1ac/0x1f0 kernel/fork.c:389 __put_task_struct+0x2e6/0x620 kernel/fork.c:666 put_task_struct include/linux/sched/task.h:96 [inline] delayed_put_task_struct+0x37f/0x490 kernel/exit.c:180 __rcu_reclaim kernel/rcu/rcu.h:178 [inline] rcu_do_batch kernel/rcu/tree.c:2558 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2818 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2785 [inline] rcu_process_callbacks+0xed5/0x1850 kernel/rcu/tree.c:2802 __do_softirq+0x2e8/0xb17 kernel/softirq.c:288 The buggy address belongs to the object at ffff8801bc21d600 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 156 bytes inside of 192-byte region [ffff8801bc21d600, ffff8801bc21d6c0) The buggy address belongs to the page: page:ffffea0006f08740 count:1 mapcount:0 mapping:ffff8801da800040 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0006cae348 ffffea00075ffc88 ffff8801da800040 raw: 0000000000000000 ffff8801bc21d000 0000000100000010 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801bc21d580: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8801bc21d600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801bc21d680: 00 00 00 04 fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801bc21d700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801bc21d780: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ==================================================================