syzkaller login: [ 29.376859] BUG: Bad rss-counter state mm:00000000aad1e675 type:MM_FILEPAGES val:33 [ 29.378219] BUG: Bad rss-counter state mm:00000000aad1e675 type:MM_ANONPAGES val:22 [ 29.421233] ================================================================== [ 29.422161] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.423185] Read of size 8 at addr ffff88800f2a56b0 by task sshd/221 [ 29.423997] [ 29.424218] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.425113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.426112] Call Trace: [ 29.426462] [ 29.426754] dump_stack_lvl+0x91/0xf0 [ 29.427261] print_report+0xcc/0x620 [ 29.427772] ? __virt_addr_valid+0x102/0x340 [ 29.428344] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.428968] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.429615] kasan_report+0xbe/0xf0 [ 29.430106] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.430764] vma_interval_tree_remove+0xc75/0xec0 [ 29.431365] vma_prepare+0xc54/0x11a0 [ 29.431861] __split_vma+0x5af/0x950 [ 29.432354] ? __pfx___split_vma+0x10/0x10 [ 29.432893] ? find_held_lock+0x2c/0x110 [ 29.433416] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.433980] ? lock_is_held_type+0x9f/0x120 [ 29.434530] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.435138] ? mtree_range_walk+0x632/0x900 [ 29.435690] ? mas_walk+0x5c7/0x7c0 [ 29.436190] do_vmi_munmap+0x1f1/0x2b0 [ 29.436695] mmap_region+0x1f9/0x2660 [ 29.437195] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.437741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.438493] ? __pfx_lock_acquire+0x10/0x10 [ 29.439061] ? __pfx_mmap_region+0x10/0x10 [ 29.439620] ? security_mmap_addr+0x7d/0xa0 [ 29.440181] ? get_unmapped_area+0x1f5/0x3f0 [ 29.440763] do_mmap+0x854/0xf00 [ 29.441224] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.441742] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.442355] ksys_mmap_pgoff+0x3af/0x500 [ 29.442886] do_syscall_64+0x3f/0x90 [ 29.443391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.444078] RIP: 0033:0x7fbcd2fd6d82 [ 29.444564] 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 [ 29.446845] RSP: 002b:00007ffd784d4048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.447806] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbcd2fd6d82 [ 29.448720] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbcd2410000 [ 29.449619] RBP: 00007fbcd2410000 R08: 0000000000000009 R09: 0000000000001000 [ 29.450536] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564059fd9ec0 [ 29.451413] R13: 00007ffd784d4060 R14: 00007ffd784d4090 R15: 00007ffd784d43f0 [ 29.452312] [ 29.452624] [ 29.452855] Allocated by task 214: [ 29.453315] kasan_save_stack+0x22/0x50 [ 29.453849] kasan_set_track+0x25/0x30 [ 29.454378] __kasan_slab_alloc+0x59/0x70 [ 29.454932] kmem_cache_alloc+0x16b/0x370 [ 29.455482] vm_area_dup+0x20/0x160 [ 29.455961] __split_vma+0x170/0x950 [ 29.456461] split_vma+0xc6/0x110 [ 29.456922] mprotect_fixup+0x8d2/0xb30 [ 29.457462] do_mprotect_pkey+0x87e/0xd40 [ 29.458017] __x64_sys_mprotect+0x78/0xc0 [ 29.458572] do_syscall_64+0x3f/0x90 [ 29.459077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.459755] [ 29.459980] Freed by task 214: [ 29.460397] kasan_save_stack+0x22/0x50 [ 29.460930] kasan_set_track+0x25/0x30 [ 29.461457] kasan_save_free_info+0x2b/0x50 [ 29.462020] __kasan_slab_free+0x10a/0x190 [ 29.462599] kmem_cache_free+0x10d/0x4d0 [ 29.463136] rcu_core+0x8c8/0x2860 [ 29.463611] __do_softirq+0x1b7/0x7d4 [ 29.464114] [ 29.464340] Last potentially related work creation: [ 29.464962] kasan_save_stack+0x22/0x50 [ 29.465498] __kasan_record_aux_stack+0x8e/0xa0 [ 29.466100] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.466788] remove_vma+0x139/0x170 [ 29.467266] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.467854] do_vmi_munmap+0x1f1/0x2b0 [ 29.468366] __vm_munmap+0x138/0x3a0 [ 29.468858] __x64_sys_munmap+0x59/0x80 [ 29.469379] do_syscall_64+0x3f/0x90 [ 29.469876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.470563] [ 29.470788] The buggy address belongs to the object at ffff88800f2a5658 [ 29.470788] which belongs to the cache vm_area_struct of size 168 [ 29.472350] The buggy address is located 88 bytes inside of [ 29.472350] freed 168-byte region [ffff88800f2a5658, ffff88800f2a5700) [ 29.473841] [ 29.474068] The buggy address belongs to the physical page: [ 29.474779] page:0000000007badfce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2a5 [ 29.475934] memcg:ffff88800a3b2201 [ 29.476392] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.477077] page_type: 0xffffffff() [ 29.477555] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 29.478550] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a3b2201 [ 29.479516] page dumped because: kasan: bad access detected [ 29.480223] [ 29.480448] Memory state around the buggy address: [ 29.481058] ffff88800f2a5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.481973] ffff88800f2a5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.482902] >ffff88800f2a5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.483804] ^ [ 29.484421] ffff88800f2a5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.485334] ffff88800f2a5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.486251] ================================================================== [ 29.487721] Disabling lock debugging due to kernel taint [ 31.444677] BUG: Bad rss-counter state mm:0000000071be3f18 type:MM_FILEPAGES val:33 [ 31.446190] BUG: Bad rss-counter state mm:0000000071be3f18 type:MM_ANONPAGES val:22 [ 32.015017] BUG: Bad rss-counter state mm:000000007066f802 type:MM_FILEPAGES val:33 [ 32.016255] BUG: Bad rss-counter state mm:000000007066f802 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49429' (ECDSA) to the list of known hosts. 2023/06/19 18:16:34 fuzzer started 2023/06/19 18:16:34 dialing manager at localhost:44161 2023/06/19 18:16:34 checking machine... 2023/06/19 18:16:34 checking revisions... [ 32.653712] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:16:34 testing simple program... [ 32.705953] cgroup: Unknown subsys name 'net' [ 32.758176] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:16:33 Registers: info registers vcpu 0 RAX=ffffffff866059f9 RBX=ffffffff86054d5c RCX=ffffffff86605972 RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86054ca4 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86054e18 R13=ffffffff85d793d4 R14=ffffffff86054ca0 R15=dffffc0000000000 RIP=ffffffff8112fc99 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=00007fc07cc1a4e0 CR3=00000000101ea000 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=36313a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363431 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83634c40 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801ce0faf8 RSI=ffffffff83634c40 RDI=ffff88801ce0fab0 RBP=ffff88801ce0fb08 RSP=ffff88801ce0fa40 R8 =0000000000000001 R9 =ffff88801ce0faf0 R10=0000000000038001 R11=00000000000247ec R12=ffff88801ce0fb78 R13=ffff88801ce0faf8 R14=ffff8880101051c0 R15=ffff88801ce0fab0 RIP=ffffffff81130641 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 00007f37ddecd900 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=00007fffe9e89000 CR3=0000000015e4c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000