syzkaller login: [ 30.649856] BUG: Bad rss-counter state mm:0000000054966b43 type:MM_FILEPAGES val:33 [ 30.651115] BUG: Bad rss-counter state mm:0000000054966b43 type:MM_ANONPAGES val:22 [ 30.815901] ================================================================== [ 30.816807] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.817756] Read of size 8 at addr ffff8880171b4a50 by task sshd/222 [ 30.818542] [ 30.818776] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.819771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.820730] Call Trace: [ 30.821055] [ 30.821363] dump_stack_lvl+0x91/0xf0 [ 30.821851] print_report+0xcc/0x620 [ 30.822332] ? __virt_addr_valid+0x102/0x340 [ 30.822891] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823501] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.824113] kasan_report+0xbe/0xf0 [ 30.824592] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.825205] vma_interval_tree_remove+0xc75/0xec0 [ 30.825799] vma_prepare+0xc54/0x11a0 [ 30.826269] __split_vma+0x5af/0x950 [ 30.826747] ? __pfx___split_vma+0x10/0x10 [ 30.827271] ? find_held_lock+0x2c/0x110 [ 30.827789] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.828358] ? lock_is_held_type+0x9f/0x120 [ 30.828894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.829497] ? mtree_range_walk+0x632/0x900 [ 30.830048] ? mas_walk+0x5c7/0x7c0 [ 30.830518] do_vmi_munmap+0x1f1/0x2b0 [ 30.831038] mmap_region+0x1f9/0x2660 [ 30.831521] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.832032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.832768] ? __pfx_lock_acquire+0x10/0x10 [ 30.833301] ? __pfx_mmap_region+0x10/0x10 [ 30.833827] ? security_mmap_addr+0x7d/0xa0 [ 30.834355] ? get_unmapped_area+0x1f5/0x3f0 [ 30.834915] do_mmap+0x854/0xf00 [ 30.835353] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.835846] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.836403] ksys_mmap_pgoff+0x3af/0x500 [ 30.836909] do_syscall_64+0x3f/0x90 [ 30.837392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.838034] RIP: 0033:0x7f47d2cbad82 [ 30.838489] 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 [ 30.840619] RSP: 002b:00007ffd216f54e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.841513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47d2cbad82 [ 30.842354] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47d20f4000 [ 30.843224] RBP: 00007f47d20f4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.844070] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e253bdaec0 [ 30.844905] R13: 00007ffd216f5500 R14: 00007ffd216f5530 R15: 00007ffd216f5890 [ 30.845750] [ 30.846050] [ 30.846263] Allocated by task 215: [ 30.846701] kasan_save_stack+0x22/0x50 [ 30.847203] kasan_set_track+0x25/0x30 [ 30.847693] __kasan_slab_alloc+0x59/0x70 [ 30.848214] kmem_cache_alloc+0x16b/0x370 [ 30.848723] vm_area_dup+0x20/0x160 [ 30.849174] __split_vma+0x170/0x950 [ 30.849636] split_vma+0xc6/0x110 [ 30.850073] mprotect_fixup+0x8d2/0xb30 [ 30.850572] do_mprotect_pkey+0x87e/0xd40 [ 30.851112] __x64_sys_mprotect+0x78/0xc0 [ 30.851626] do_syscall_64+0x3f/0x90 [ 30.852104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.852741] [ 30.852955] Freed by task 13: [ 30.853334] kasan_save_stack+0x22/0x50 [ 30.853832] kasan_set_track+0x25/0x30 [ 30.854322] kasan_save_free_info+0x2b/0x50 [ 30.854861] __kasan_slab_free+0x10a/0x190 [ 30.855398] kmem_cache_free+0x10d/0x4d0 [ 30.855903] rcu_core+0x8c8/0x2860 [ 30.856343] __do_softirq+0x1b7/0x7d4 [ 30.856818] [ 30.857032] Last potentially related work creation: [ 30.857608] kasan_save_stack+0x22/0x50 [ 30.858111] __kasan_record_aux_stack+0x8e/0xa0 [ 30.858678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.859342] remove_vma+0x139/0x170 [ 30.859793] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.860351] do_vmi_munmap+0x1f1/0x2b0 [ 30.860837] __vm_munmap+0x138/0x3a0 [ 30.861305] __x64_sys_munmap+0x59/0x80 [ 30.861805] do_syscall_64+0x3f/0x90 [ 30.862282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862926] [ 30.863148] The buggy address belongs to the object at ffff8880171b49f8 [ 30.863148] which belongs to the cache vm_area_struct of size 168 [ 30.864597] The buggy address is located 88 bytes inside of [ 30.864597] freed 168-byte region [ffff8880171b49f8, ffff8880171b4aa0) [ 30.865987] [ 30.866204] The buggy address belongs to the physical page: [ 30.866861] page:0000000009bdf93b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x171b4 [ 30.867958] memcg:ffff888015baa301 [ 30.868386] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.869035] page_type: 0xffffffff() [ 30.869486] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.870419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015baa301 [ 30.871367] page dumped because: kasan: bad access detected [ 30.872050] [ 30.872267] Memory state around the buggy address: [ 30.872860] ffff8880171b4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.873718] ffff8880171b4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.874581] >ffff8880171b4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.875441] ^ [ 30.876138] ffff8880171b4a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.876993] ffff8880171b4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.877850] ================================================================== [ 30.878975] Disabling lock debugging due to kernel taint [ 33.152352] BUG: Bad rss-counter state mm:00000000a7b33cce type:MM_FILEPAGES val:33 [ 33.153488] BUG: Bad rss-counter state mm:00000000a7b33cce type:MM_ANONPAGES val:22 [ 33.546257] BUG: Bad rss-counter state mm:00000000ddd98d0c type:MM_FILEPAGES val:33 [ 33.547472] BUG: Bad rss-counter state mm:00000000ddd98d0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14233' (ECDSA) to the list of known hosts. 2023/06/20 22:34:35 fuzzer started 2023/06/20 22:34:35 dialing manager at localhost:36067 2023/06/20 22:34:35 checking machine... 2023/06/20 22:34:35 checking revisions... [ 34.124877] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:34:35 testing simple program... [ 34.155763] cgroup: Unknown subsys name 'net' [ 34.190878] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:34:35 Registers: info registers vcpu 0 RAX=ffffffff866212df RBX=ffffffff813ad470 RCX=ffffffff812d86ea RDX=1ffff1100d9c135e RSI=ffffffff866212df RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801a263080 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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=00007f5500094870 CR3=0000000016830000 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=2034333a34333a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a34333a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000f RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016a01b40 RSI=ffffffff84499e4f RDI=0000000000000007 RBP=000000000000000d RSP=ffff88800fc770e8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88800c4e8d98 R12=000000000000000d R13=000000000000000d R14=ffff88800fc77768 R15=0000000000000000 RIP=ffffffff84499e54 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 00007f84f48a5900 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=00007f84f486a008 CR3=000000001a164000 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