syzkaller login: [ 31.849547] BUG: Bad rss-counter state mm:0000000049b095d6 type:MM_FILEPAGES val:33 [ 31.850723] BUG: Bad rss-counter state mm:0000000049b095d6 type:MM_ANONPAGES val:22 [ 31.888355] ================================================================== [ 31.889376] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.890459] Read of size 8 at addr ffff888017ddd3f8 by task sshd/222 [ 31.891320] [ 31.891605] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.892551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.893675] Call Trace: [ 31.894031] [ 31.894349] dump_stack_lvl+0x91/0xf0 [ 31.894913] print_report+0xcc/0x620 [ 31.895551] ? __virt_addr_valid+0x102/0x340 [ 31.896112] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.896768] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.897530] kasan_report+0xbe/0xf0 [ 31.898004] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.898634] vma_interval_tree_remove+0xc75/0xec0 [ 31.899298] vma_prepare+0xc54/0x11a0 [ 31.899912] __split_vma+0x5af/0x950 [ 31.900507] ? __pfx___split_vma+0x10/0x10 [ 31.901056] ? find_held_lock+0x2c/0x110 [ 31.901632] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.902302] ? lock_is_held_type+0x9f/0x120 [ 31.903001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.903679] ? mtree_range_walk+0x632/0x900 [ 31.904232] ? mas_walk+0x5c7/0x7c0 [ 31.904702] do_vmi_munmap+0x1f1/0x2b0 [ 31.905190] mmap_region+0x1f9/0x2660 [ 31.905671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.906181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.906891] ? __pfx_lock_acquire+0x10/0x10 [ 31.907445] ? __pfx_mmap_region+0x10/0x10 [ 31.907975] ? security_mmap_addr+0x7d/0xa0 [ 31.908498] ? get_unmapped_area+0x1f5/0x3f0 [ 31.909050] do_mmap+0x854/0xf00 [ 31.909485] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.909983] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.910537] ksys_mmap_pgoff+0x3af/0x500 [ 31.911043] do_syscall_64+0x3f/0x90 [ 31.911534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.912175] RIP: 0033:0x7faae3cbdd82 [ 31.912634] 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 [ 31.914732] RSP: 002b:00007fffe2983bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.915633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faae3cbdd82 [ 31.916633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faae30f7000 [ 31.917465] RBP: 00007faae30f7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.918303] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e43720cf70 [ 31.919162] R13: 00007fffe2983bd0 R14: 00007fffe2983c00 R15: 00007fffe2983f60 [ 31.920016] [ 31.920304] [ 31.920518] Allocated by task 215: [ 31.920950] kasan_save_stack+0x22/0x50 [ 31.921451] kasan_set_track+0x25/0x30 [ 31.921942] __kasan_slab_alloc+0x59/0x70 [ 31.922460] kmem_cache_alloc+0x16b/0x370 [ 31.922972] vm_area_dup+0x20/0x160 [ 31.923436] __split_vma+0x170/0x950 [ 31.923901] split_vma+0xc6/0x110 [ 31.924336] mprotect_fixup+0x8d2/0xb30 [ 31.924833] do_mprotect_pkey+0x87e/0xd40 [ 31.925348] __x64_sys_mprotect+0x78/0xc0 [ 31.925872] do_syscall_64+0x3f/0x90 [ 31.926340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.926972] [ 31.927185] Freed by task 215: [ 31.927589] kasan_save_stack+0x22/0x50 [ 31.928088] kasan_set_track+0x25/0x30 [ 31.928576] kasan_save_free_info+0x2b/0x50 [ 31.929097] __kasan_slab_free+0x10a/0x190 [ 31.929626] kmem_cache_free+0x10d/0x4d0 [ 31.930129] rcu_core+0x8c8/0x2860 [ 31.930564] __do_softirq+0x1b7/0x7d4 [ 31.931038] [ 31.931251] Last potentially related work creation: [ 31.931831] kasan_save_stack+0x22/0x50 [ 31.932326] __kasan_record_aux_stack+0x8e/0xa0 [ 31.932891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.933525] remove_vma+0x139/0x170 [ 31.933971] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.934517] do_vmi_munmap+0x1f1/0x2b0 [ 31.934995] __vm_munmap+0x138/0x3a0 [ 31.935458] __x64_sys_munmap+0x59/0x80 [ 31.935945] do_syscall_64+0x3f/0x90 [ 31.936409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.937040] [ 31.937254] The buggy address belongs to the object at ffff888017ddd3a0 [ 31.937254] which belongs to the cache vm_area_struct of size 168 [ 31.938703] The buggy address is located 88 bytes inside of [ 31.938703] freed 168-byte region [ffff888017ddd3a0, ffff888017ddd448) [ 31.940105] [ 31.940319] The buggy address belongs to the physical page: [ 31.940964] page:00000000b22e32dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17ddd [ 31.942038] memcg:ffff88801462d201 [ 31.942456] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.943092] page_type: 0xffffffff() [ 31.943545] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.944448] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801462d201 [ 31.945335] page dumped because: kasan: bad access detected [ 31.945985] [ 31.946197] Memory state around the buggy address: [ 31.946769] ffff888017ddd280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.947615] ffff888017ddd300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.948458] >ffff888017ddd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.949297] ^ [ 31.950124] ffff888017ddd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.950966] ffff888017ddd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.951823] ================================================================== [ 31.952801] Disabling lock debugging due to kernel taint [ 33.769692] BUG: Bad rss-counter state mm:0000000059ee6118 type:MM_FILEPAGES val:33 [ 33.770475] BUG: Bad rss-counter state mm:0000000059ee6118 type:MM_ANONPAGES val:22 [ 34.217457] BUG: Bad rss-counter state mm:0000000068f2c3f0 type:MM_FILEPAGES val:33 [ 34.218238] BUG: Bad rss-counter state mm:0000000068f2c3f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55342' (ECDSA) to the list of known hosts. 2023/06/20 07:28:05 fuzzer started 2023/06/20 07:28:06 dialing manager at localhost:44161 2023/06/20 07:28:06 checking machine... 2023/06/20 07:28:06 checking revisions... [ 34.929540] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:28:06 testing simple program... [ 34.973406] cgroup: Unknown subsys name 'net' [ 35.009268] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:28:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f91e1b91163 RSP=ffff88806ce09a48 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f91e1b91000 R11=00000000000b6996 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888018231b40 R15=ffff88800ee142e0 RIP=ffffffff8135b910 RFL=00000216 [----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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f91e169e900 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=00007f91e1c55618 CR3=000000000ef2e000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f67c960c870 CR3=000000000c6d8000 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=4d627f5e28d3169be44144112e8db13b XMM02=000000000011d218eff9b2d0a8fce9cb XMM03=000000000011d2e82c67c8bc2e329bc3 XMM04=194271009b3ebf5e00000000000ae988 XMM05=59d5b690e0af863b0000000000133be0 XMM06=585feb98686b8dd00000000000132a48 XMM07=e042d86d42eb936e00000000001242b0 XMM08=0f91b6216b560136000000000011d2e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000