syzkaller login: [ 30.989796] BUG: Bad rss-counter state mm:000000005a9b2167 type:MM_FILEPAGES val:33 [ 30.990995] BUG: Bad rss-counter state mm:000000005a9b2167 type:MM_ANONPAGES val:22 [ 31.130953] ================================================================== [ 31.131614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.132265] Read of size 8 at addr ffff888019e36968 by task sshd/228 [ 31.132799] [ 31.132952] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.133548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.134260] Call Trace: [ 31.134487] [ 31.134687] dump_stack_lvl+0x91/0xf0 [ 31.135031] print_report+0xcc/0x620 [ 31.135544] ? __virt_addr_valid+0x102/0x340 [ 31.135934] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.136369] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.136807] kasan_report+0xbe/0xf0 [ 31.137140] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.137589] vma_interval_tree_remove+0xc75/0xec0 [ 31.138028] vma_prepare+0xc54/0x11a0 [ 31.138366] __split_vma+0x5af/0x950 [ 31.138699] ? __pfx___split_vma+0x10/0x10 [ 31.139071] ? find_held_lock+0x2c/0x110 [ 31.139431] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.139825] ? lock_is_held_type+0x9f/0x120 [ 31.140205] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.140625] ? mtree_range_walk+0x632/0x900 [ 31.141008] ? mas_walk+0x5c7/0x7c0 [ 31.141343] do_vmi_munmap+0x1f1/0x2b0 [ 31.141717] mmap_region+0x1f9/0x2660 [ 31.142044] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.142397] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.142898] ? __pfx_lock_acquire+0x10/0x10 [ 31.143266] ? __pfx_mmap_region+0x10/0x10 [ 31.143635] ? security_mmap_addr+0x7d/0xa0 [ 31.144003] ? get_unmapped_area+0x1f5/0x3f0 [ 31.144384] do_mmap+0x854/0xf00 [ 31.144688] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.145026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.145432] ksys_mmap_pgoff+0x3af/0x500 [ 31.145816] do_syscall_64+0x3f/0x90 [ 31.146153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.146605] RIP: 0033:0x7f2b9cae4d82 [ 31.146920] 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 [ 31.148406] RSP: 002b:00007ffef862ffa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.149034] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b9cae4d82 [ 31.149623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b9bf1e000 [ 31.150240] RBP: 00007f2b9bf1e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.150829] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611d88ebb20 [ 31.151407] R13: 00007ffef862ffc0 R14: 00007ffef862fff0 R15: 00007ffef8630350 [ 31.152007] [ 31.152211] [ 31.152362] Allocated by task 221: [ 31.152665] kasan_save_stack+0x22/0x50 [ 31.153025] kasan_set_track+0x25/0x30 [ 31.153366] __kasan_slab_alloc+0x59/0x70 [ 31.153753] kmem_cache_alloc+0x16b/0x370 [ 31.154099] vm_area_dup+0x20/0x160 [ 31.154414] __split_vma+0x170/0x950 [ 31.154739] split_vma+0xc6/0x110 [ 31.155051] mprotect_fixup+0x8d2/0xb30 [ 31.155397] do_mprotect_pkey+0x87e/0xd40 [ 31.155756] __x64_sys_mprotect+0x78/0xc0 [ 31.156117] do_syscall_64+0x3f/0x90 [ 31.156447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.156892] [ 31.157041] Freed by task 221: [ 31.157308] kasan_save_stack+0x22/0x50 [ 31.157701] kasan_set_track+0x25/0x30 [ 31.158045] kasan_save_free_info+0x2b/0x50 [ 31.158415] __kasan_slab_free+0x10a/0x190 [ 31.158787] kmem_cache_free+0x10d/0x4d0 [ 31.159134] rcu_core+0x8c8/0x2860 [ 31.159440] __do_softirq+0x1b7/0x7d4 [ 31.159769] [ 31.159920] Last potentially related work creation: [ 31.160323] kasan_save_stack+0x22/0x50 [ 31.160670] __kasan_record_aux_stack+0x8e/0xa0 [ 31.161066] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.161509] remove_vma+0x139/0x170 [ 31.161842] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.162225] do_vmi_munmap+0x1f1/0x2b0 [ 31.162569] __vm_munmap+0x138/0x3a0 [ 31.162893] __x64_sys_munmap+0x59/0x80 [ 31.163234] do_syscall_64+0x3f/0x90 [ 31.163568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.164016] [ 31.164165] The buggy address belongs to the object at ffff888019e36910 [ 31.164165] which belongs to the cache vm_area_struct of size 168 [ 31.165184] The buggy address is located 88 bytes inside of [ 31.165184] freed 168-byte region [ffff888019e36910, ffff888019e369b8) [ 31.166181] [ 31.166331] The buggy address belongs to the physical page: [ 31.166784] page:00000000e978afaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e36 [ 31.167537] memcg:ffff88800e938401 [ 31.167834] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.168315] page_type: 0xffffffff() [ 31.168628] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.169252] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e938401 [ 31.169930] page dumped because: kasan: bad access detected [ 31.170398] [ 31.170553] Memory state around the buggy address: [ 31.170964] ffff888019e36800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.171571] ffff888019e36880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.172180] >ffff888019e36900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.172778] ^ [ 31.173323] ffff888019e36980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.173943] ffff888019e36a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.174540] ================================================================== [ 31.175202] Disabling lock debugging due to kernel taint [ 32.690233] BUG: Bad rss-counter state mm:00000000c13d5ea8 type:MM_FILEPAGES val:33 [ 32.691156] BUG: Bad rss-counter state mm:00000000c13d5ea8 type:MM_ANONPAGES val:22 [ 33.069815] BUG: Bad rss-counter state mm:00000000f6a24a81 type:MM_FILEPAGES val:33 [ 33.070551] BUG: Bad rss-counter state mm:00000000f6a24a81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27817' (ECDSA) to the list of known hosts. 2023/06/21 09:05:45 fuzzer started 2023/06/21 09:05:45 dialing manager at localhost:36067 2023/06/21 09:05:45 checking machine... 2023/06/21 09:05:45 checking revisions... [ 33.622461] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:05:45 testing simple program... [ 33.660484] cgroup: Unknown subsys name 'net' [ 33.694195] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:05:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce39500 RCX=00000007b1211dbb RDX=1ffff1100d9c4fdd RSI=0000000000000006 RDI=ffffffff852c7900 RBP=ffff88806ce27ee8 RSP=ffff8880165ffc88 R8 =ffff88806ce39f40 R9 =ffffed1002cbff8c R10=0000000000000003 R11=000000168051dd94 R12=0000000000086b7d R13=0000000000000000 R14=ffff88806ce39f08 R15=ffff88800e513680 RIP=ffffffff8123620c RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f89536fa900 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=00007f8953cb1618 CR3=000000000b8ec000 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=00000000000000000000000000000000 XMM02=0000000000000000ffffffffff000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=656e696c203a7325000000000075252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007fd0e19068d0 CR3=000000000d612000 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=ab7823539e7e5fbd7942428f23de76bf XMM02=000000000011ae50ec2efd57dc4c00df XMM03=00000000001223c8b35100437c3ba6fa XMM04=b88c3585dd217b4f00000000000ae988 XMM05=1a58cb52dc18f6d70000000000132250 XMM06=bfded7d077c5a66900000000001310b8 XMM07=e042d86d42eb936e0000000000122648 XMM08=b35100437c3ba6fa000000000011aeb0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000