syzkaller login: [ 31.085397] BUG: Bad rss-counter state mm:00000000c7aac436 type:MM_FILEPAGES val:33 [ 31.086845] BUG: Bad rss-counter state mm:00000000c7aac436 type:MM_ANONPAGES val:22 [ 31.234628] ================================================================== [ 31.235697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.236934] Read of size 8 at addr ffff888009a5adf0 by task sshd/222 [ 31.237845] [ 31.238066] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.238965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.239950] Call Trace: [ 31.240270] [ 31.240561] dump_stack_lvl+0x91/0xf0 [ 31.241057] print_report+0xcc/0x620 [ 31.241551] ? __virt_addr_valid+0x102/0x340 [ 31.242117] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243376] kasan_report+0xbe/0xf0 [ 31.243852] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244476] vma_interval_tree_remove+0xc75/0xec0 [ 31.245086] vma_prepare+0xc54/0x11a0 [ 31.245565] __split_vma+0x5af/0x950 [ 31.246049] ? __pfx___split_vma+0x10/0x10 [ 31.246610] ? find_held_lock+0x2c/0x110 [ 31.247134] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.247701] ? lock_is_held_type+0x9f/0x120 [ 31.248255] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.248863] ? mtree_range_walk+0x632/0x900 [ 31.249425] ? mas_walk+0x5c7/0x7c0 [ 31.249914] do_vmi_munmap+0x1f1/0x2b0 [ 31.250430] mmap_region+0x1f9/0x2660 [ 31.250923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.251455] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.252178] ? __pfx_lock_acquire+0x10/0x10 [ 31.252717] ? __pfx_mmap_region+0x10/0x10 [ 31.253247] ? security_mmap_addr+0x7d/0xa0 [ 31.253779] ? get_unmapped_area+0x1f5/0x3f0 [ 31.254348] do_mmap+0x854/0xf00 [ 31.254787] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.255290] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.255852] ksys_mmap_pgoff+0x3af/0x500 [ 31.256360] do_syscall_64+0x3f/0x90 [ 31.256839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257489] RIP: 0033:0x7f5fb7311d82 [ 31.257955] 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 [ 31.260101] RSP: 002b:00007ffed3198418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.261004] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5fb7311d82 [ 31.261864] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5fb674b000 [ 31.262726] RBP: 00007f5fb674b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.263585] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c26e8ecec0 [ 31.264458] R13: 00007ffed3198430 R14: 00007ffed3198460 R15: 00007ffed31987c0 [ 31.265331] [ 31.265633] [ 31.265842] Allocated by task 215: [ 31.266270] kasan_save_stack+0x22/0x50 [ 31.266799] kasan_set_track+0x25/0x30 [ 31.267302] __kasan_slab_alloc+0x59/0x70 [ 31.267827] kmem_cache_alloc+0x16b/0x370 [ 31.268344] vm_area_dup+0x20/0x160 [ 31.268799] __split_vma+0x170/0x950 [ 31.269269] split_vma+0xc6/0x110 [ 31.269707] mprotect_fixup+0x8d2/0xb30 [ 31.270210] do_mprotect_pkey+0x87e/0xd40 [ 31.270746] __x64_sys_mprotect+0x78/0xc0 [ 31.271271] do_syscall_64+0x3f/0x90 [ 31.271751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272392] [ 31.272608] Freed by task 215: [ 31.273004] kasan_save_stack+0x22/0x50 [ 31.273508] kasan_set_track+0x25/0x30 [ 31.274001] kasan_save_free_info+0x2b/0x50 [ 31.274539] __kasan_slab_free+0x10a/0x190 [ 31.275067] kmem_cache_free+0x10d/0x4d0 [ 31.275576] rcu_core+0x8c8/0x2860 [ 31.276020] __do_softirq+0x1b7/0x7d4 [ 31.276501] [ 31.276719] Last potentially related work creation: [ 31.277298] kasan_save_stack+0x22/0x50 [ 31.277803] __kasan_record_aux_stack+0x8e/0xa0 [ 31.278400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.279048] remove_vma+0x139/0x170 [ 31.279505] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.280070] do_vmi_munmap+0x1f1/0x2b0 [ 31.280558] __vm_munmap+0x138/0x3a0 [ 31.281027] __x64_sys_munmap+0x59/0x80 [ 31.281525] do_syscall_64+0x3f/0x90 [ 31.282001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282644] [ 31.282861] The buggy address belongs to the object at ffff888009a5ad98 [ 31.282861] which belongs to the cache vm_area_struct of size 168 [ 31.284329] The buggy address is located 88 bytes inside of [ 31.284329] freed 168-byte region [ffff888009a5ad98, ffff888009a5ae40) [ 31.285719] [ 31.285937] The buggy address belongs to the physical page: [ 31.286604] page:00000000fefd696a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a5a [ 31.287686] memcg:ffff88801456f401 [ 31.288112] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.288762] page_type: 0xffffffff() [ 31.289211] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.290138] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801456f401 [ 31.291075] page dumped because: kasan: bad access detected [ 31.291731] [ 31.291946] Memory state around the buggy address: [ 31.292524] ffff888009a5ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.293389] ffff888009a5ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.294253] >ffff888009a5ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.295116] ^ [ 31.295927] ffff888009a5ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.296797] ffff888009a5ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.297655] ================================================================== [ 31.298778] Disabling lock debugging due to kernel taint [ 33.877434] BUG: Bad rss-counter state mm:00000000f523509f type:MM_FILEPAGES val:33 [ 33.878489] BUG: Bad rss-counter state mm:00000000f523509f type:MM_ANONPAGES val:22 [ 34.309766] BUG: Bad rss-counter state mm:00000000f4ce937f type:MM_FILEPAGES val:33 [ 34.310632] BUG: Bad rss-counter state mm:00000000f4ce937f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53276' (ECDSA) to the list of known hosts. 2023/06/20 15:06:26 fuzzer started 2023/06/20 15:06:26 dialing manager at localhost:36067 2023/06/20 15:06:26 checking machine... 2023/06/20 15:06:26 checking revisions... [ 34.945826] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:06:26 testing simple program... [ 34.996829] cgroup: Unknown subsys name 'net' [ 35.038589] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:06:26 Registers: info registers vcpu 0 RAX=00000000000000a0 RBX=00000000000000a0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800ba38000 RSP=ffff88800ba377d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffffed1001747001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff82191d9e RFL=00000093 [--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=00007f43d9a83100 CR3=000000000d564000 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=73e7296e8e0396b751450008503a5919 XMM02=000000000011b648eff9b2d0a8fce9cb XMM03=000000000011b7182c67c8bc2e329bc3 XMM04=c103bfa7ebb78d1c00000000000ae988 XMM05=50a4a9ea08b7efb30000000000133130 XMM06=00c3ffa147b8d85700000000001321d0 XMM07=e042d86d42eb936e00000000001226e0 XMM08=d9f5fbcc1b764eb5000000000011b718 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888016707568 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b980 RFL=00000286 [--S--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 00007f5240430900 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=00007f52403cd008 CR3=000000000ba0c000 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