syzkaller login: [ 30.048775] BUG: Bad rss-counter state mm:0000000092745ca3 type:MM_FILEPAGES val:33 [ 30.050161] BUG: Bad rss-counter state mm:0000000092745ca3 type:MM_ANONPAGES val:22 [ 30.218596] ================================================================== [ 30.219696] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.220747] Read of size 8 at addr ffff88800e928880 by task sshd/219 [ 30.221715] [ 30.221936] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.222779] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.223774] Call Trace: [ 30.224091] [ 30.224371] dump_stack_lvl+0x91/0xf0 [ 30.224860] print_report+0xcc/0x620 [ 30.225343] ? __virt_addr_valid+0x102/0x340 [ 30.225884] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.226486] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.227101] kasan_report+0xbe/0xf0 [ 30.227571] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.228198] vma_interval_tree_remove+0xc75/0xec0 [ 30.228787] vma_prepare+0xc54/0x11a0 [ 30.229261] __split_vma+0x5af/0x950 [ 30.229725] ? __pfx___split_vma+0x10/0x10 [ 30.230246] ? find_held_lock+0x2c/0x110 [ 30.230756] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.231312] ? lock_is_held_type+0x9f/0x120 [ 30.231867] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.232470] ? mtree_range_walk+0x632/0x900 [ 30.233014] ? mas_walk+0x5c7/0x7c0 [ 30.233483] do_vmi_munmap+0x1f1/0x2b0 [ 30.233965] mmap_region+0x1f9/0x2660 [ 30.234438] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.234945] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.235667] ? __pfx_lock_acquire+0x10/0x10 [ 30.236236] ? __pfx_mmap_region+0x10/0x10 [ 30.236763] ? security_mmap_addr+0x7d/0xa0 [ 30.237290] ? get_unmapped_area+0x1f5/0x3f0 [ 30.237838] do_mmap+0x854/0xf00 [ 30.238276] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.238766] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.239318] ksys_mmap_pgoff+0x3af/0x500 [ 30.239825] do_syscall_64+0x3f/0x90 [ 30.240303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.240949] RIP: 0033:0x7fa8731bad82 [ 30.241398] 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 [ 30.243462] RSP: 002b:00007ffe1e1830a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.244372] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8731bad82 [ 30.245218] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8725f4000 [ 30.246050] RBP: 00007fa8725f4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.246877] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558fac28b20 [ 30.247713] R13: 00007ffe1e1830c0 R14: 00007ffe1e1830f0 R15: 00007ffe1e183450 [ 30.248550] [ 30.248829] [ 30.249031] Allocated by task 212: [ 30.249433] kasan_save_stack+0x22/0x50 [ 30.249911] kasan_set_track+0x25/0x30 [ 30.250377] __kasan_slab_alloc+0x59/0x70 [ 30.250865] kmem_cache_alloc+0x16b/0x370 [ 30.251349] vm_area_dup+0x20/0x160 [ 30.251786] __split_vma+0x170/0x950 [ 30.252227] split_vma+0xc6/0x110 [ 30.252640] mprotect_fixup+0x8d2/0xb30 [ 30.253114] do_mprotect_pkey+0x87e/0xd40 [ 30.253604] __x64_sys_mprotect+0x78/0xc0 [ 30.254102] do_syscall_64+0x3f/0x90 [ 30.254565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.255174] [ 30.255382] Freed by task 212: [ 30.255773] kasan_save_stack+0x22/0x50 [ 30.256247] kasan_set_track+0x25/0x30 [ 30.256712] kasan_save_free_info+0x2b/0x50 [ 30.257214] __kasan_slab_free+0x10a/0x190 [ 30.257720] kmem_cache_free+0x10d/0x4d0 [ 30.258198] rcu_core+0x8c8/0x2860 [ 30.258618] __do_softirq+0x1b7/0x7d4 [ 30.259069] [ 30.259273] Last potentially related work creation: [ 30.259830] kasan_save_stack+0x22/0x50 [ 30.260309] __kasan_record_aux_stack+0x8e/0xa0 [ 30.260850] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.261454] remove_vma+0x139/0x170 [ 30.261877] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.262402] do_vmi_munmap+0x1f1/0x2b0 [ 30.262859] __vm_munmap+0x138/0x3a0 [ 30.263306] __x64_sys_munmap+0x59/0x80 [ 30.263791] do_syscall_64+0x3f/0x90 [ 30.264240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.264843] [ 30.265049] The buggy address belongs to the object at ffff88800e928828 [ 30.265049] which belongs to the cache vm_area_struct of size 168 [ 30.266427] The buggy address is located 88 bytes inside of [ 30.266427] freed 168-byte region [ffff88800e928828, ffff88800e9288d0) [ 30.267779] [ 30.267984] The buggy address belongs to the physical page: [ 30.268603] page:00000000683b4719 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe928 [ 30.269629] memcg:ffff88800e5d5a01 [ 30.270033] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.270639] page_type: 0xffffffff() [ 30.271070] raw: 0100000000000200 ffff8880087a0c80 ffffea000037aa00 dead000000000002 [ 30.271957] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5d5a01 [ 30.272819] page dumped because: kasan: bad access detected [ 30.273451] [ 30.273657] Memory state around the buggy address: [ 30.274222] ffff88800e928780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.275035] ffff88800e928800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.275869] >ffff88800e928880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.276679] ^ [ 30.277068] ffff88800e928900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.277874] ffff88800e928980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.278683] ================================================================== [ 30.279890] Disabling lock debugging due to kernel taint [ 32.313402] BUG: Bad rss-counter state mm:000000009967877e type:MM_FILEPAGES val:33 [ 32.315019] BUG: Bad rss-counter state mm:000000009967877e type:MM_ANONPAGES val:22 [ 32.883587] BUG: Bad rss-counter state mm:00000000c5f7500c type:MM_FILEPAGES val:33 [ 32.884584] BUG: Bad rss-counter state mm:00000000c5f7500c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21939' (ECDSA) to the list of known hosts. 2023/06/21 00:51:19 fuzzer started 2023/06/21 00:51:19 dialing manager at localhost:36067 2023/06/21 00:51:19 checking machine... 2023/06/21 00:51:19 checking revisions... [ 33.512202] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:51:19 testing simple program... [ 33.569144] cgroup: Unknown subsys name 'net' [ 33.617790] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:51:19 Registers: info registers vcpu 0 RAX=000000000008aa79 RBX=0000000000000001 RCX=ffffffff8363e063 RDX=000000000008aa82 RSI=00000000000263e0 RDI=000000000019ff6b RBP=ffff888016e376f0 RSP=ffff888016e37628 R8 =ffffffff863b3bde R9 =ffff888016e376d8 R10=0000000000038001 R11=000000000008aa79 R12=ffff888016e376f8 R13=ffff888016e376e0 R14=ffff888016e376d9 R15=ffff888016e37698 RIP=ffffffff81130853 RFL=00000287 [--S--PC] 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 00007f30b9f32900 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=00007f30ba4e9618 CR3=000000001bc02000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000256 RBX=ffff88801a206e80 RCX=ffffffff812e0135 RDX=0000000000110001 RSI=0000000000000004 RDI=ffff88801470f7f0 RBP=ffff88801470f918 RSP=ffff88801470f880 R8 =0000000000110000 R9 =ffff8880084d4e40 R10=0000000000000003 R11=0000000080120000 R12=ffffea0000688180 R13=ffff88801a206d98 R14=0000000000110000 R15=ffff8880087a0c80 RIP=ffffffff81809672 RFL=00000096 [--S-AP-] 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 00007fa846651900 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=00007fa845b6e000 CR3=000000000cace000 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=00000000000aead06b1e99b806172e3b XMM01=00000000000f827080f09f19808d26a3 XMM02=00000000000f85b02e86c1e8fc577532 XMM03=00000000000fac48ac585006bc0bee6f XMM04=4938bd5439dab0e500000000000ae988 XMM05=d7ddb578931ca56b0000000000131268 XMM06=806171799158d9670000000000130198 XMM07=e042d86d42eb936e0000000000120ed8 XMM08=7a33dc42cddb7736000000000011c078 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000