syzkaller login: [ 30.675598] sshd (212) used greatest stack depth: 24128 bytes left [ 30.676463] BUG: Bad rss-counter state mm:00000000a8fdcb37 type:MM_FILEPAGES val:33 [ 30.677647] BUG: Bad rss-counter state mm:00000000a8fdcb37 type:MM_ANONPAGES val:22 [ 30.847691] ================================================================== [ 30.848786] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.850016] Read of size 8 at addr ffff88800da83880 by task sshd/219 [ 30.850960] [ 30.851236] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.852308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.853512] Call Trace: [ 30.853894] [ 30.854238] dump_stack_lvl+0x91/0xf0 [ 30.854821] print_report+0xcc/0x620 [ 30.855406] ? __virt_addr_valid+0x102/0x340 [ 30.856074] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.856832] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.857589] kasan_report+0xbe/0xf0 [ 30.858176] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.858925] vma_interval_tree_remove+0xc75/0xec0 [ 30.859681] vma_prepare+0xc54/0x11a0 [ 30.860264] __split_vma+0x5af/0x950 [ 30.860841] ? __pfx___split_vma+0x10/0x10 [ 30.861480] ? find_held_lock+0x2c/0x110 [ 30.862100] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.862782] ? lock_is_held_type+0x9f/0x120 [ 30.863436] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.864176] ? mtree_range_walk+0x632/0x900 [ 30.864848] ? mas_walk+0x5c7/0x7c0 [ 30.865422] do_vmi_munmap+0x1f1/0x2b0 [ 30.866016] mmap_region+0x1f9/0x2660 [ 30.866601] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.867239] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.868113] ? __pfx_lock_acquire+0x10/0x10 [ 30.868751] ? __pfx_mmap_region+0x10/0x10 [ 30.869389] ? security_mmap_addr+0x7d/0xa0 [ 30.870039] ? get_unmapped_area+0x1f5/0x3f0 [ 30.870717] do_mmap+0x854/0xf00 [ 30.871261] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.871855] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.872538] ksys_mmap_pgoff+0x3af/0x500 [ 30.873151] do_syscall_64+0x3f/0x90 [ 30.873727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874506] RIP: 0033:0x7fd54b8eed82 [ 30.875055] 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 [ 30.877699] RSP: 002b:00007ffea22f80c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.878797] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd54b8eed82 [ 30.879854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd54ad28000 [ 30.880894] RBP: 00007fd54ad28000 R08: 0000000000000009 R09: 0000000000001000 [ 30.881929] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c54eac1ec0 [ 30.882977] R13: 00007ffea22f80e0 R14: 00007ffea22f8110 R15: 00007ffea22f8470 [ 30.884059] [ 30.884416] [ 30.884671] Allocated by task 212: [ 30.885183] kasan_save_stack+0x22/0x50 [ 30.885765] kasan_set_track+0x25/0x30 [ 30.886357] __kasan_slab_alloc+0x59/0x70 [ 30.886923] kmem_cache_alloc+0x16b/0x370 [ 30.887474] vm_area_dup+0x20/0x160 [ 30.888011] __split_vma+0x170/0x950 [ 30.888545] split_vma+0xc6/0x110 [ 30.889069] mprotect_fixup+0x8d2/0xb30 [ 30.889693] do_mprotect_pkey+0x87e/0xd40 [ 30.890300] __x64_sys_mprotect+0x78/0xc0 [ 30.890937] do_syscall_64+0x3f/0x90 [ 30.891525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.892403] [ 30.892692] Freed by task 212: [ 30.893231] kasan_save_stack+0x22/0x50 [ 30.893921] kasan_set_track+0x25/0x30 [ 30.894593] kasan_save_free_info+0x2b/0x50 [ 30.895334] __kasan_slab_free+0x10a/0x190 [ 30.896062] kmem_cache_free+0x10d/0x4d0 [ 30.896763] rcu_core+0x8c8/0x2860 [ 30.897375] __do_softirq+0x1b7/0x7d4 [ 30.898038] [ 30.898325] Last potentially related work creation: [ 30.899056] kasan_save_stack+0x22/0x50 [ 30.899701] __kasan_record_aux_stack+0x8e/0xa0 [ 30.900420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.901226] remove_vma+0x139/0x170 [ 30.901792] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.902487] do_vmi_munmap+0x1f1/0x2b0 [ 30.903095] __vm_munmap+0x138/0x3a0 [ 30.903704] __x64_sys_munmap+0x59/0x80 [ 30.904327] do_syscall_64+0x3f/0x90 [ 30.904920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.905723] [ 30.905994] The buggy address belongs to the object at ffff88800da83828 [ 30.905994] which belongs to the cache vm_area_struct of size 168 [ 30.907845] The buggy address is located 88 bytes inside of [ 30.907845] freed 168-byte region [ffff88800da83828, ffff88800da838d0) [ 30.909612] [ 30.909880] The buggy address belongs to the physical page: [ 30.910707] page:00000000c1297995 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda83 [ 30.912086] memcg:ffff88800e279001 [ 30.912621] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.913425] page_type: 0xffffffff() [ 30.913987] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.915157] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e279001 [ 30.916302] page dumped because: kasan: bad access detected [ 30.917132] [ 30.917403] Memory state around the buggy address: [ 30.918132] ffff88800da83780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.919223] ffff88800da83800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.920299] >ffff88800da83880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.921376] ^ [ 30.921893] ffff88800da83900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.922968] ffff88800da83980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.924064] ================================================================== [ 30.925294] Disabling lock debugging due to kernel taint [ 33.175574] BUG: Bad rss-counter state mm:00000000ca556788 type:MM_FILEPAGES val:33 [ 33.176558] BUG: Bad rss-counter state mm:00000000ca556788 type:MM_ANONPAGES val:22 [ 33.728878] BUG: Bad rss-counter state mm:000000007218c70e type:MM_FILEPAGES val:33 [ 33.730071] BUG: Bad rss-counter state mm:000000007218c70e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12697' (ECDSA) to the list of known hosts. 2023/06/20 23:14:24 fuzzer started 2023/06/20 23:14:24 dialing manager at localhost:36067 2023/06/20 23:14:24 checking machine... 2023/06/20 23:14:24 checking revisions... [ 34.362358] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:14:24 testing simple program... [ 34.421136] cgroup: Unknown subsys name 'net' [ 34.483574] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:14:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019c47e00 RCX=0000000000000000 RDX=1ffff1100198fc38 RSI=ffffffff81af9c10 RDI=ffff88800cc7e1c0 RBP=0000000000000010 RSP=ffff888019c47be8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00000000000000c0 R13=ffff88800cc7e000 R14=0000000000000000 R15=ffff888019c47e00 RIP=ffffffff81af9c2c 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 00007f1e36ab6700 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=00007f13de9d8880 CR3=000000000e4c8000 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=2033323a34313a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a34313a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b3be1 RBX=0000000000000001 RCX=ffffffff863b3bde RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff863b3be0 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008aa79 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88801ca3ff08 R15=ffff88806cf09a50 RIP=ffffffff811311e5 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 00007f1e1db28900 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=00007f1e1e0df618 CR3=0000000017d2a000 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=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