syzkaller login: [ 28.683039] BUG: Bad rss-counter state mm:00000000b997021a type:MM_FILEPAGES val:33 [ 28.684272] BUG: Bad rss-counter state mm:00000000b997021a type:MM_ANONPAGES val:22 [ 28.844361] ================================================================== [ 28.845473] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.846612] Read of size 8 at addr ffff88800dffa880 by task sshd/221 [ 28.847641] [ 28.847862] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.848763] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.849814] Call Trace: [ 28.850147] [ 28.850440] dump_stack_lvl+0x91/0xf0 [ 28.850972] print_report+0xcc/0x620 [ 28.851482] ? __virt_addr_valid+0x102/0x340 [ 28.852049] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.852713] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.853348] kasan_report+0xbe/0xf0 [ 28.853852] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.854521] vma_interval_tree_remove+0xc75/0xec0 [ 28.855170] vma_prepare+0xc54/0x11a0 [ 28.855693] __split_vma+0x5af/0x950 [ 28.856183] ? __pfx___split_vma+0x10/0x10 [ 28.856749] ? find_held_lock+0x2c/0x110 [ 28.857289] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.857910] ? lock_is_held_type+0x9f/0x120 [ 28.858486] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.859144] ? mtree_range_walk+0x632/0x900 [ 28.859735] ? mas_walk+0x5c7/0x7c0 [ 28.860231] do_vmi_munmap+0x1f1/0x2b0 [ 28.860759] mmap_region+0x1f9/0x2660 [ 28.861259] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.861833] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.862593] ? __pfx_lock_acquire+0x10/0x10 [ 28.863166] ? __pfx_mmap_region+0x10/0x10 [ 28.863737] ? security_mmap_addr+0x7d/0xa0 [ 28.864291] ? get_unmapped_area+0x1f5/0x3f0 [ 28.864881] do_mmap+0x854/0xf00 [ 28.865341] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.865870] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.866465] ksys_mmap_pgoff+0x3af/0x500 [ 28.867050] do_syscall_64+0x3f/0x90 [ 28.867577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.868249] RIP: 0033:0x7f0d33579d82 [ 28.868733] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 28.871008] RSP: 002b:00007ffe0a3d5dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.871983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d33579d82 [ 28.872880] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d329b3000 [ 28.873779] RBP: 00007f0d329b3000 R08: 0000000000000009 R09: 0000000000001000 [ 28.874694] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a213646ec0 [ 28.875621] R13: 00007ffe0a3d5df0 R14: 00007ffe0a3d5e20 R15: 00007ffe0a3d6180 [ 28.876525] [ 28.876831] [ 28.877053] Allocated by task 214: [ 28.877517] kasan_save_stack+0x22/0x50 [ 28.878045] kasan_set_track+0x25/0x30 [ 28.878592] __kasan_slab_alloc+0x59/0x70 [ 28.879166] kmem_cache_alloc+0x16b/0x370 [ 28.879723] vm_area_dup+0x20/0x160 [ 28.880196] __split_vma+0x170/0x950 [ 28.880757] split_vma+0xc6/0x110 [ 28.881359] mprotect_fixup+0x8d2/0xb30 [ 28.882067] do_mprotect_pkey+0x87e/0xd40 [ 28.882797] __x64_sys_mprotect+0x78/0xc0 [ 28.883526] do_syscall_64+0x3f/0x90 [ 28.884182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.885064] [ 28.885356] Freed by task 13: [ 28.885881] kasan_save_stack+0x22/0x50 [ 28.886572] kasan_set_track+0x25/0x30 [ 28.887272] kasan_save_free_info+0x2b/0x50 [ 28.888004] __kasan_slab_free+0x10a/0x190 [ 28.888742] kmem_cache_free+0x10d/0x4d0 [ 28.889445] rcu_core+0x8c8/0x2860 [ 28.890065] __do_softirq+0x1b7/0x7d4 [ 28.890721] [ 28.891020] Last potentially related work creation: [ 28.891809] kasan_save_stack+0x22/0x50 [ 28.892479] __kasan_record_aux_stack+0x8e/0xa0 [ 28.893252] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.894154] remove_vma+0x139/0x170 [ 28.894779] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.895567] do_vmi_munmap+0x1f1/0x2b0 [ 28.896246] __vm_munmap+0x138/0x3a0 [ 28.896902] __x64_sys_munmap+0x59/0x80 [ 28.897578] do_syscall_64+0x3f/0x90 [ 28.898232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.899113] [ 28.899400] Second to last potentially related work creation: [ 28.900324] kasan_save_stack+0x22/0x50 [ 28.901015] __kasan_record_aux_stack+0x8e/0xa0 [ 28.901791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.902664] remove_vma+0x139/0x170 [ 28.903295] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.904069] do_vmi_munmap+0x1f1/0x2b0 [ 28.904724] __vm_munmap+0x138/0x3a0 [ 28.905352] elf_map+0x26f/0x310 [ 28.905956] load_elf_binary+0x3417/0x5030 [ 28.906670] bprm_execve+0x803/0x1940 [ 28.907313] do_execveat_common+0x734/0x8e0 [ 28.908023] __x64_sys_execve+0x93/0xc0 [ 28.908689] do_syscall_64+0x3f/0x90 [ 28.909325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.910218] [ 28.910513] The buggy address belongs to the object at ffff88800dffa828 [ 28.910513] which belongs to the cache vm_area_struct of size 168 [ 28.912505] The buggy address is located 88 bytes inside of [ 28.912505] freed 168-byte region [ffff88800dffa828, ffff88800dffa8d0) [ 28.914454] [ 28.914758] The buggy address belongs to the physical page: [ 28.915552] page:0000000010423d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdffa [ 28.916685] memcg:ffff88800dfaa801 [ 28.917131] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.917865] page_type: 0xffffffff() [ 28.918332] raw: 0100000000000200 ffff8880087a0c80 ffffea0000390940 dead000000000005 [ 28.919331] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfaa801 [ 28.920282] page dumped because: kasan: bad access detected [ 28.920974] [ 28.921193] Memory state around the buggy address: [ 28.921796] ffff88800dffa780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.922685] ffff88800dffa800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.923591] >ffff88800dffa880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.924475] ^ [ 28.924903] ffff88800dffa900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.925797] ffff88800dffa980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 28.926688] ================================================================== [ 28.927742] Disabling lock debugging due to kernel taint [ 30.672498] BUG: Bad rss-counter state mm:00000000c6a65e66 type:MM_FILEPAGES val:33 [ 30.673165] BUG: Bad rss-counter state mm:00000000c6a65e66 type:MM_ANONPAGES val:22 [ 31.083089] BUG: Bad rss-counter state mm:00000000b237e724 type:MM_FILEPAGES val:33 [ 31.084153] BUG: Bad rss-counter state mm:00000000b237e724 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6871' (ECDSA) to the list of known hosts. 2023/06/20 23:28:21 fuzzer started 2023/06/20 23:28:21 dialing manager at localhost:36067 2023/06/20 23:28:21 checking machine... 2023/06/20 23:28:21 checking revisions... [ 31.791639] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:28:21 testing simple program... [ 31.847611] cgroup: Unknown subsys name 'net' [ 31.899511] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:28:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff8608a55a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000004 R15=ffff88806ce09a98 RIP=ffffffff81130b1f RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f5a132b7860 CR3=0000000008ed0000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=b21296a0d766b282f642c521372f3677 XMM02=ec2efd57dc4c00df000000000011d4b0 XMM03=4e5601531d2d0f57000000000011d580 XMM04=35312d341be65d6200000000000ae988 XMM05=e4cb8bb95a7664b60000000000133198 XMM06=625dcc93a583e43a0000000000132000 XMM07=e042d86d42eb936e0000000000121f40 XMM08=4e5601531d2d0f57000000000011d580 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015f5ef98 RCX=0000000000000001 RDX=1ffff11002bebdf4 RSI=ffff888015f5f3a8 RDI=ffff888015f5efa0 RBP=ffff888015f5f3a8 RSP=ffff888015f5eef0 R8 =0000000000000001 R9 =ffff888015f5efd8 R10=0000000000038001 R11=0000000000021ee8 R12=0000000000000008 R13=ffff888015f5efe0 R14=ffff888015f5f3a8 R15=ffff888015f5ef98 RIP=ffffffff81130445 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f09eef2b900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f09eef0a020 CR3=0000000019eb6000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000