syzkaller login: [ 30.591358] BUG: Bad rss-counter state mm:0000000078d12fdd type:MM_FILEPAGES val:33 [ 30.592474] BUG: Bad rss-counter state mm:0000000078d12fdd type:MM_ANONPAGES val:22 [ 30.764295] ================================================================== [ 30.765203] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.766150] Read of size 8 at addr ffff888015ae5968 by task sshd/221 [ 30.766936] [ 30.767156] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.768122] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.769088] Call Trace: [ 30.769404] [ 30.769722] dump_stack_lvl+0x91/0xf0 [ 30.770218] print_report+0xcc/0x620 [ 30.770718] ? __virt_addr_valid+0x102/0x340 [ 30.771274] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.771898] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772507] kasan_report+0xbe/0xf0 [ 30.772990] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773614] vma_interval_tree_remove+0xc75/0xec0 [ 30.774214] vma_prepare+0xc54/0x11a0 [ 30.774706] __split_vma+0x5af/0x950 [ 30.775179] ? __pfx___split_vma+0x10/0x10 [ 30.775704] ? find_held_lock+0x2c/0x110 [ 30.776226] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.776794] ? lock_is_held_type+0x9f/0x120 [ 30.777336] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.777941] ? mtree_range_walk+0x632/0x900 [ 30.778513] ? mas_walk+0x5c7/0x7c0 [ 30.778992] do_vmi_munmap+0x1f1/0x2b0 [ 30.779482] mmap_region+0x1f9/0x2660 [ 30.779963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.780472] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.781192] ? __pfx_lock_acquire+0x10/0x10 [ 30.781718] ? __pfx_mmap_region+0x10/0x10 [ 30.782247] ? security_mmap_addr+0x7d/0xa0 [ 30.782775] ? get_unmapped_area+0x1f5/0x3f0 [ 30.783323] do_mmap+0x854/0xf00 [ 30.783765] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.784265] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.784825] ksys_mmap_pgoff+0x3af/0x500 [ 30.785332] do_syscall_64+0x3f/0x90 [ 30.785814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786494] RIP: 0033:0x7fcadecead82 [ 30.786952] 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 [ 30.789057] RSP: 002b:00007ffe5557c628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.789954] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcadecead82 [ 30.790814] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcade124000 [ 30.791658] RBP: 00007fcade124000 R08: 0000000000000009 R09: 0000000000001000 [ 30.792487] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652c541eec0 [ 30.793328] R13: 00007ffe5557c640 R14: 00007ffe5557c670 R15: 00007ffe5557c9d0 [ 30.794176] [ 30.794476] [ 30.794691] Allocated by task 214: [ 30.795117] kasan_save_stack+0x22/0x50 [ 30.795626] kasan_set_track+0x25/0x30 [ 30.796121] __kasan_slab_alloc+0x59/0x70 [ 30.796651] kmem_cache_alloc+0x16b/0x370 [ 30.797173] vm_area_dup+0x20/0x160 [ 30.797634] __split_vma+0x170/0x950 [ 30.798098] split_vma+0xc6/0x110 [ 30.798558] mprotect_fixup+0x8d2/0xb30 [ 30.799064] do_mprotect_pkey+0x87e/0xd40 [ 30.799587] __x64_sys_mprotect+0x78/0xc0 [ 30.800113] do_syscall_64+0x3f/0x90 [ 30.800591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801228] [ 30.801445] Freed by task 211: [ 30.801833] kasan_save_stack+0x22/0x50 [ 30.802340] kasan_set_track+0x25/0x30 [ 30.802831] kasan_save_free_info+0x2b/0x50 [ 30.803370] __kasan_slab_free+0x10a/0x190 [ 30.803898] kmem_cache_free+0x10d/0x4d0 [ 30.804399] rcu_core+0x8c8/0x2860 [ 30.804846] __do_softirq+0x1b7/0x7d4 [ 30.805319] [ 30.805536] Last potentially related work creation: [ 30.806116] kasan_save_stack+0x22/0x50 [ 30.806619] __kasan_record_aux_stack+0x8e/0xa0 [ 30.807191] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.807836] remove_vma+0x139/0x170 [ 30.808294] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.808859] do_vmi_munmap+0x1f1/0x2b0 [ 30.809340] __vm_munmap+0x138/0x3a0 [ 30.809805] __x64_sys_munmap+0x59/0x80 [ 30.810325] do_syscall_64+0x3f/0x90 [ 30.810809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.811460] [ 30.811676] The buggy address belongs to the object at ffff888015ae5910 [ 30.811676] which belongs to the cache vm_area_struct of size 168 [ 30.813128] The buggy address is located 88 bytes inside of [ 30.813128] freed 168-byte region [ffff888015ae5910, ffff888015ae59b8) [ 30.814540] [ 30.814756] The buggy address belongs to the physical page: [ 30.815412] page:000000005194080a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ae5 [ 30.816494] memcg:ffff888017c16f01 [ 30.816923] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.817559] page_type: 0xffffffff() [ 30.818012] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.818951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017c16f01 [ 30.819850] page dumped because: kasan: bad access detected [ 30.820503] [ 30.820720] Memory state around the buggy address: [ 30.821304] ffff888015ae5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.822161] ffff888015ae5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.823033] >ffff888015ae5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.823886] ^ [ 30.824665] ffff888015ae5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.825520] ffff888015ae5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.826378] ================================================================== [ 30.827355] Disabling lock debugging due to kernel taint [ 32.793918] BUG: Bad rss-counter state mm:0000000050c4c052 type:MM_FILEPAGES val:33 [ 32.794860] BUG: Bad rss-counter state mm:0000000050c4c052 type:MM_ANONPAGES val:22 [ 33.316172] BUG: Bad rss-counter state mm:00000000240d762c type:MM_FILEPAGES val:33 [ 33.317388] BUG: Bad rss-counter state mm:00000000240d762c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58374' (ECDSA) to the list of known hosts. 2023/06/21 04:22:03 fuzzer started 2023/06/21 04:22:03 dialing manager at localhost:36067 2023/06/21 04:22:04 checking machine... 2023/06/21 04:22:04 checking revisions... [ 33.943695] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:22:04 testing simple program... [ 33.984574] cgroup: Unknown subsys name 'net' [ 34.020553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:22:03 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=0000000000000001 RCX=ffffffff83641156 RDX=0000000000000008 RSI=ffffffff863b4250 RDI=ffffffff85fa57f4 RBP=ffff8880146b7508 RSP=ffff8880146b7410 R8 =ffffffff863b4250 R9 =ffff8880146b74f0 R10=0000000000038001 R11=000000000008ab8c R12=ffffffff85fa5810 R13=ffff8880146b74f8 R14=ffff8880146b74f1 R15=ffff8880146b74b0 RIP=ffffffff8112fc20 RFL=00000212 [----A--] 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 00007f1b423f6900 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=00007f49606d8650 CR3=000000000d998000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0bea0a519937904400000000000ae988 XMM05=39a618e4303e3fe70000000000132c58 XMM06=e3c68adee1cd201e00000000001319f8 XMM07=fb795ef6d65770560000000000121c38 XMM08=4f5453444600273d67736d000d0a0920 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=ffff888008c04400 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=00007ffc50b8e568 CR3=0000000010074000 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=2033303a32323a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a32323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000