syzkaller login: [ 61.200245] BUG: Bad rss-counter state mm:00000000fc4085d5 type:MM_FILEPAGES val:33 [ 61.201571] BUG: Bad rss-counter state mm:00000000fc4085d5 type:MM_ANONPAGES val:22 [ 61.371815] ================================================================== [ 61.372756] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.373716] Read of size 8 at addr ffff888018cffd08 by task sshd/228 [ 61.374710] [ 61.374939] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.375845] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.376886] Call Trace: [ 61.377216] [ 61.377504] dump_stack_lvl+0x91/0xf0 [ 61.378035] print_report+0xcc/0x620 [ 61.378532] ? __virt_addr_valid+0x102/0x340 [ 61.379106] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.379756] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.380391] kasan_report+0xbe/0xf0 [ 61.380891] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.381516] vma_interval_tree_remove+0xc75/0xec0 [ 61.382182] vma_prepare+0xc54/0x11a0 [ 61.382687] __split_vma+0x5af/0x950 [ 61.383163] ? __pfx___split_vma+0x10/0x10 [ 61.383708] ? find_held_lock+0x2c/0x110 [ 61.384234] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.384824] ? lock_is_held_type+0x9f/0x120 [ 61.385362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.386011] ? mtree_range_walk+0x632/0x900 [ 61.386577] ? mas_walk+0x5c7/0x7c0 [ 61.387080] do_vmi_munmap+0x1f1/0x2b0 [ 61.387580] mmap_region+0x1f9/0x2660 [ 61.388093] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.388627] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.389357] ? __pfx_lock_acquire+0x10/0x10 [ 61.389931] ? __pfx_mmap_region+0x10/0x10 [ 61.390470] ? security_mmap_addr+0x7d/0xa0 [ 61.391027] ? get_unmapped_area+0x1f5/0x3f0 [ 61.391614] do_mmap+0x854/0xf00 [ 61.392065] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.392563] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.393159] ksys_mmap_pgoff+0x3af/0x500 [ 61.393743] do_syscall_64+0x3f/0x90 [ 61.394407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.395271] RIP: 0033:0x7fcd1315ad82 [ 61.395872] 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 [ 61.398616] RSP: 002b:00007ffc8cd4fd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.399545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd1315ad82 [ 61.400418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd12594000 [ 61.401299] RBP: 00007fcd12594000 R08: 0000000000000009 R09: 0000000000001000 [ 61.402207] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642e2522ec0 [ 61.403097] R13: 00007ffc8cd4fd80 R14: 00007ffc8cd4fdb0 R15: 00007ffc8cd50110 [ 61.403977] [ 61.404272] [ 61.404488] Allocated by task 221: [ 61.404938] kasan_save_stack+0x22/0x50 [ 61.405448] kasan_set_track+0x25/0x30 [ 61.405987] __kasan_slab_alloc+0x59/0x70 [ 61.406525] kmem_cache_alloc+0x16b/0x370 [ 61.407067] vm_area_dup+0x20/0x160 [ 61.407534] __split_vma+0x170/0x950 [ 61.408020] split_vma+0xc6/0x110 [ 61.408479] mprotect_fixup+0x8d2/0xb30 [ 61.408997] do_mprotect_pkey+0x87e/0xd40 [ 61.409530] __x64_sys_mprotect+0x78/0xc0 [ 61.410089] do_syscall_64+0x3f/0x90 [ 61.410562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.411234] [ 61.411453] Freed by task 221: [ 61.411863] kasan_save_stack+0x22/0x50 [ 61.412381] kasan_set_track+0x25/0x30 [ 61.412889] kasan_save_free_info+0x2b/0x50 [ 61.413432] __kasan_slab_free+0x10a/0x190 [ 61.414011] kmem_cache_free+0x10d/0x4d0 [ 61.414535] rcu_core+0x8c8/0x2860 [ 61.415011] __do_softirq+0x1b7/0x7d4 [ 61.415552] [ 61.415811] Last potentially related work creation: [ 61.416410] kasan_save_stack+0x22/0x50 [ 61.416932] __kasan_record_aux_stack+0x8e/0xa0 [ 61.417524] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.418205] remove_vma+0x139/0x170 [ 61.418702] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.419287] do_vmi_munmap+0x1f1/0x2b0 [ 61.419785] __vm_munmap+0x138/0x3a0 [ 61.420264] __x64_sys_munmap+0x59/0x80 [ 61.420776] do_syscall_64+0x3f/0x90 [ 61.421264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.421936] [ 61.422156] The buggy address belongs to the object at ffff888018cffcb0 [ 61.422156] which belongs to the cache vm_area_struct of size 168 [ 61.423695] The buggy address is located 88 bytes inside of [ 61.423695] freed 168-byte region [ffff888018cffcb0, ffff888018cffd58) [ 61.425123] [ 61.425341] The buggy address belongs to the physical page: [ 61.426042] page:00000000a14b4262 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18cff [ 61.427170] memcg:ffff88801922f201 [ 61.427611] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.428277] page_type: 0xffffffff() [ 61.428749] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.429695] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801922f201 [ 61.430640] page dumped because: kasan: bad access detected [ 61.431330] [ 61.431550] Memory state around the buggy address: [ 61.432157] ffff888018cffc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 61.433027] ffff888018cffc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 61.433940] >ffff888018cffd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 61.434837] ^ [ 61.435284] ffff888018cffd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.436171] ffff888018cffe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.437051] ================================================================== [ 61.437992] Disabling lock debugging due to kernel taint [ 63.305760] BUG: Bad rss-counter state mm:00000000e2845aa3 type:MM_FILEPAGES val:33 [ 63.306858] BUG: Bad rss-counter state mm:00000000e2845aa3 type:MM_ANONPAGES val:22 [ 63.799632] BUG: Bad rss-counter state mm:00000000922c3154 type:MM_FILEPAGES val:33 [ 63.801181] BUG: Bad rss-counter state mm:00000000922c3154 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43866' (ECDSA) to the list of known hosts. 2023/06/19 20:32:28 fuzzer started 2023/06/19 20:32:28 dialing manager at localhost:44161 2023/06/19 20:32:28 checking machine... 2023/06/19 20:32:28 checking revisions... [ 64.481797] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:32:28 testing simple program... [ 64.526559] cgroup: Unknown subsys name 'net' [ 64.565074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:32:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888010008000 RCX=ffffffff81c61d01 RDX=ffff88800f9db680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016f0fa08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000008 R13=0000000000000c40 R14=ffff888019ecc948 R15=ffffffff87f3b160 RIP=ffffffff814c07e0 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 00007f3952d08700 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=00007f9554f8a2f0 CR3=0000000019302000 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=2037323a32333a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a32333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000450 RBX=0000561c436d5890 RCX=0000000000000000 RDX=0000561c436e9380 RSI=0000000000000004 RDI=0000561c436e9380 RBP=0000000000000000 RSP=00007ffd3b57c5c8 R8 =00007f2832566983 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000297 R12=0000000000000008 R13=0000561c436d1350 R14=0000000000000000 R15=0000561c436d67a0 RIP=00007f2831f8aad5 RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2831a37900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd3b576000 CR3=00000000102fa000 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=ffffff0000ff00000000000000000000 XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000