syzkaller login: [ 39.100818] BUG: Bad rss-counter state mm:00000000870423de type:MM_FILEPAGES val:33 [ 39.102399] BUG: Bad rss-counter state mm:00000000870423de type:MM_ANONPAGES val:22 [ 39.259742] ================================================================== [ 39.260803] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.261925] Read of size 8 at addr ffff88800eef5798 by task sshd/219 [ 39.262750] [ 39.262958] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.263768] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.264690] Call Trace: [ 39.265002] [ 39.265274] dump_stack_lvl+0x91/0xf0 [ 39.265737] print_report+0xcc/0x620 [ 39.266195] ? __virt_addr_valid+0x102/0x340 [ 39.266715] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.267292] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.267869] kasan_report+0xbe/0xf0 [ 39.268320] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.268908] vma_interval_tree_remove+0xc75/0xec0 [ 39.269493] vma_prepare+0xc54/0x11a0 [ 39.269960] __split_vma+0x5af/0x950 [ 39.270438] ? __pfx___split_vma+0x10/0x10 [ 39.270968] ? find_held_lock+0x2c/0x110 [ 39.271484] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.272050] ? lock_is_held_type+0x9f/0x120 [ 39.272582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.273215] ? mtree_range_walk+0x632/0x900 [ 39.273766] ? mas_walk+0x5c7/0x7c0 [ 39.274243] do_vmi_munmap+0x1f1/0x2b0 [ 39.274743] mmap_region+0x1f9/0x2660 [ 39.275225] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.275742] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.276458] ? __pfx_lock_acquire+0x10/0x10 [ 39.277001] ? __pfx_mmap_region+0x10/0x10 [ 39.277542] ? security_mmap_addr+0x7d/0xa0 [ 39.278079] ? get_unmapped_area+0x1f5/0x3f0 [ 39.278624] do_mmap+0x854/0xf00 [ 39.279058] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.279549] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.280103] ksys_mmap_pgoff+0x3af/0x500 [ 39.280612] do_syscall_64+0x3f/0x90 [ 39.281111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.281754] RIP: 0033:0x7f38a2c68d82 [ 39.282201] 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 [ 39.284317] RSP: 002b:00007ffce2c09e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.285234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38a2c68d82 [ 39.286089] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38a20a2000 [ 39.286934] RBP: 00007f38a20a2000 R08: 0000000000000009 R09: 0000000000001000 [ 39.287773] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626ce639b20 [ 39.288618] R13: 00007ffce2c09e20 R14: 00007ffce2c09e50 R15: 00007ffce2c0a1b0 [ 39.289489] [ 39.289781] [ 39.289989] Allocated by task 212: [ 39.290412] kasan_save_stack+0x22/0x50 [ 39.290926] kasan_set_track+0x25/0x30 [ 39.291419] __kasan_slab_alloc+0x59/0x70 [ 39.291938] kmem_cache_alloc+0x16b/0x370 [ 39.292455] vm_area_dup+0x20/0x160 [ 39.292910] __split_vma+0x170/0x950 [ 39.293387] split_vma+0xc6/0x110 [ 39.293827] mprotect_fixup+0x8d2/0xb30 [ 39.294329] do_mprotect_pkey+0x87e/0xd40 [ 39.294845] __x64_sys_mprotect+0x78/0xc0 [ 39.295358] do_syscall_64+0x3f/0x90 [ 39.295837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.296471] [ 39.296684] Freed by task 212: [ 39.297084] kasan_save_stack+0x22/0x50 [ 39.297592] kasan_set_track+0x25/0x30 [ 39.298078] kasan_save_free_info+0x2b/0x50 [ 39.298602] __kasan_slab_free+0x10a/0x190 [ 39.299144] kmem_cache_free+0x10d/0x4d0 [ 39.299655] rcu_core+0x8c8/0x2860 [ 39.300092] __do_softirq+0x1b7/0x7d4 [ 39.300574] [ 39.300783] Last potentially related work creation: [ 39.301381] kasan_save_stack+0x22/0x50 [ 39.301882] __kasan_record_aux_stack+0x8e/0xa0 [ 39.302448] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.303080] remove_vma+0x139/0x170 [ 39.303529] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.304090] do_vmi_munmap+0x1f1/0x2b0 [ 39.304566] __vm_munmap+0x138/0x3a0 [ 39.305034] __x64_sys_munmap+0x59/0x80 [ 39.305532] do_syscall_64+0x3f/0x90 [ 39.305997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.306634] [ 39.306854] Second to last potentially related work creation: [ 39.307523] kasan_save_stack+0x22/0x50 [ 39.308034] __kasan_record_aux_stack+0x8e/0xa0 [ 39.308614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.309260] remove_vma+0x139/0x170 [ 39.309705] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.310256] do_vmi_munmap+0x1f1/0x2b0 [ 39.310732] mmap_region+0x1f9/0x2660 [ 39.311204] do_mmap+0x854/0xf00 [ 39.311639] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.312120] ksys_mmap_pgoff+0x3af/0x500 [ 39.312621] do_syscall_64+0x3f/0x90 [ 39.313107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.313740] [ 39.313954] The buggy address belongs to the object at ffff88800eef5740 [ 39.313954] which belongs to the cache vm_area_struct of size 168 [ 39.315422] The buggy address is located 88 bytes inside of [ 39.315422] freed 168-byte region [ffff88800eef5740, ffff88800eef57e8) [ 39.316833] [ 39.317059] The buggy address belongs to the physical page: [ 39.317723] page:0000000029d46609 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeef5 [ 39.318789] memcg:ffff8880095c8b01 [ 39.319216] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.319866] page_type: 0xffffffff() [ 39.320316] raw: 0100000000000200 ffff88800879fc80 ffffea0000382240 dead000000000008 [ 39.321241] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095c8b01 [ 39.322135] page dumped because: kasan: bad access detected [ 39.322797] [ 39.323012] Memory state around the buggy address: [ 39.323590] ffff88800eef5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.324453] ffff88800eef5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.325336] >ffff88800eef5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.326180] ^ [ 39.326666] ffff88800eef5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.327530] ffff88800eef5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.328385] ================================================================== [ 39.329718] Disabling lock debugging due to kernel taint [ 41.932278] BUG: Bad rss-counter state mm:000000005d6fc7e3 type:MM_FILEPAGES val:33 [ 41.933811] BUG: Bad rss-counter state mm:000000005d6fc7e3 type:MM_ANONPAGES val:22 [ 42.497838] BUG: Bad rss-counter state mm:00000000c54063c0 type:MM_FILEPAGES val:33 [ 42.499061] BUG: Bad rss-counter state mm:00000000c54063c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42132' (ECDSA) to the list of known hosts. 2023/06/20 01:55:26 fuzzer started 2023/06/20 01:55:27 dialing manager at localhost:44161 2023/06/20 01:55:27 checking machine... 2023/06/20 01:55:27 checking revisions... [ 43.153726] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:55:27 testing simple program... [ 43.207103] cgroup: Unknown subsys name 'net' [ 43.280143] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:55:26 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888016617540 RSP=ffff888016617428 R8 =ffffffff86088c1e R9 =ffff888016617528 R10=0000000000038001 R11=0000000000003c0d R12=ffff888016617548 R13=ffff888016617530 R14=ffff888016617580 R15=ffff8880166174e8 RIP=ffffffff81131770 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 00007ffa77719700 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=00007fc185f0a530 CR3=000000000f684000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34393838342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343938 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=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880165451c0 RSI=ffffffff8386b8c9 RDI=ffffffff85d3bed0 RBP=ffff888016bd7c48 RSP=ffff888016bd7b20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=00000000000000e6 R14=0000000000000000 R15=ffff88800f3a5a00 RIP=ffffffff814c0800 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 00007f2577a3c900 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=00007ffcdb32c000 CR3=000000001be64000 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=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000