syzkaller login: [ 38.701147] BUG: Bad rss-counter state mm:0000000020babc52 type:MM_FILEPAGES val:33 [ 38.702395] BUG: Bad rss-counter state mm:0000000020babc52 type:MM_ANONPAGES val:22 [ 38.871936] ================================================================== [ 38.873001] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.874074] Read of size 8 at addr ffff88801a23adf0 by task sshd/219 [ 38.875011] [ 38.875262] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.876245] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.877376] Call Trace: [ 38.877743] [ 38.878071] dump_stack_lvl+0x91/0xf0 [ 38.878632] print_report+0xcc/0x620 [ 38.879185] ? __virt_addr_valid+0x102/0x340 [ 38.879821] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880543] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881279] kasan_report+0xbe/0xf0 [ 38.881848] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882582] vma_interval_tree_remove+0xc75/0xec0 [ 38.883292] vma_prepare+0xc54/0x11a0 [ 38.883863] __split_vma+0x5af/0x950 [ 38.884430] ? __pfx___split_vma+0x10/0x10 [ 38.885063] ? find_held_lock+0x2c/0x110 [ 38.885678] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.886343] ? lock_is_held_type+0x9f/0x120 [ 38.886972] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.887696] ? mtree_range_walk+0x632/0x900 [ 38.888358] ? mas_walk+0x5c7/0x7c0 [ 38.888924] do_vmi_munmap+0x1f1/0x2b0 [ 38.889493] mmap_region+0x1f9/0x2660 [ 38.890049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.890637] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.891476] ? __pfx_lock_acquire+0x10/0x10 [ 38.892108] ? __pfx_mmap_region+0x10/0x10 [ 38.892733] ? security_mmap_addr+0x7d/0xa0 [ 38.893367] ? get_unmapped_area+0x1f5/0x3f0 [ 38.894011] do_mmap+0x854/0xf00 [ 38.894520] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.895103] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.895762] ksys_mmap_pgoff+0x3af/0x500 [ 38.896373] do_syscall_64+0x3f/0x90 [ 38.896939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897704] RIP: 0033:0x7fdd28284d82 [ 38.898232] 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 [ 38.900774] RSP: 002b:00007ffe8aa00c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.901834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd28284d82 [ 38.902831] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd276be000 [ 38.903822] RBP: 00007fdd276be000 R08: 0000000000000009 R09: 0000000000001000 [ 38.904839] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e555b0fd90 [ 38.905833] R13: 00007ffe8aa00c90 R14: 00007ffe8aa00cc0 R15: 00007ffe8aa01020 [ 38.906846] [ 38.907186] [ 38.907434] Allocated by task 212: [ 38.907932] kasan_save_stack+0x22/0x50 [ 38.908540] kasan_set_track+0x25/0x30 [ 38.909112] __kasan_slab_alloc+0x59/0x70 [ 38.909723] kmem_cache_alloc+0x16b/0x370 [ 38.910323] vm_area_dup+0x20/0x160 [ 38.910849] __split_vma+0x170/0x950 [ 38.911393] split_vma+0xc6/0x110 [ 38.911903] mprotect_fixup+0x8d2/0xb30 [ 38.912502] do_mprotect_pkey+0x87e/0xd40 [ 38.913103] __x64_sys_mprotect+0x78/0xc0 [ 38.913707] do_syscall_64+0x3f/0x90 [ 38.914253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.915006] [ 38.915253] Freed by task 212: [ 38.915710] kasan_save_stack+0x22/0x50 [ 38.916294] kasan_set_track+0x25/0x30 [ 38.916892] kasan_save_free_info+0x2b/0x50 [ 38.917508] __kasan_slab_free+0x10a/0x190 [ 38.918124] kmem_cache_free+0x10d/0x4d0 [ 38.918713] rcu_core+0x8c8/0x2860 [ 38.919230] __do_softirq+0x1b7/0x7d4 [ 38.919788] [ 38.920041] Last potentially related work creation: [ 38.920741] kasan_save_stack+0x22/0x50 [ 38.921324] __kasan_record_aux_stack+0x8e/0xa0 [ 38.921990] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.922743] remove_vma+0x139/0x170 [ 38.923268] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.923925] do_vmi_munmap+0x1f1/0x2b0 [ 38.924475] __vm_munmap+0x138/0x3a0 [ 38.924998] __x64_sys_munmap+0x59/0x80 [ 38.925548] do_syscall_64+0x3f/0x90 [ 38.926079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.926796] [ 38.927046] The buggy address belongs to the object at ffff88801a23ad98 [ 38.927046] which belongs to the cache vm_area_struct of size 168 [ 38.928761] The buggy address is located 88 bytes inside of [ 38.928761] freed 168-byte region [ffff88801a23ad98, ffff88801a23ae40) [ 38.930406] [ 38.930655] The buggy address belongs to the physical page: [ 38.931431] page:0000000021272eec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a23a [ 38.932720] memcg:ffff888018ed1001 [ 38.933214] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.933964] page_type: 0xffffffff() [ 38.934483] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.935558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ed1001 [ 38.936636] page dumped because: kasan: bad access detected [ 38.937393] [ 38.937641] Memory state around the buggy address: [ 38.938317] ffff88801a23ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.939303] ffff88801a23ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.940303] >ffff88801a23ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.941315] ^ [ 38.942251] ffff88801a23ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.943242] ffff88801a23ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.944244] ================================================================== [ 38.945409] Disabling lock debugging due to kernel taint [ 40.532412] BUG: Bad rss-counter state mm:000000005f8862bf type:MM_FILEPAGES val:33 [ 40.533342] BUG: Bad rss-counter state mm:000000005f8862bf type:MM_ANONPAGES val:22 [ 40.959948] BUG: Bad rss-counter state mm:00000000599c11e4 type:MM_FILEPAGES val:33 [ 40.960737] BUG: Bad rss-counter state mm:00000000599c11e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64977' (ECDSA) to the list of known hosts. 2023/06/21 10:06:02 fuzzer started 2023/06/21 10:06:02 dialing manager at localhost:36067 2023/06/21 10:06:02 checking machine... 2023/06/21 10:06:02 checking revisions... [ 41.653515] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:06:02 testing simple program... [ 41.718658] cgroup: Unknown subsys name 'net' [ 41.816009] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:06:02 Registers: info registers vcpu 0 RAX=ffffed1002d73f10 RBX=ffff888016b9fa08 RCX=0000000000000000 RDX=ffff888014609b40 RSI=ffffffff8369a53e RDI=0000000000000005 RBP=ffff888014643000 RSP=ffff888016b9f850 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880145a1dc0 R13=ffff8880146431b8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8369a54d RFL=00000282 [--S----] 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 00007fd781145900 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=00007fd7816fc618 CR3=000000000ee12000 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=563412feff00545000000000000080fe 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=0000000000000002 RBX=0000000000000001 RCX=ffffffff810001cd RDX=0000000000000005 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff85d7a9c4 RSP=ffff88806cf099e0 R8 =ffffffff86073d08 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=ffffffff85d7a9d8 R13=ffffffff85d7a9c4 R14=ffffffff85d7a9c4 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000213 [----A-C] 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 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=00007eff2796aa40 CR3=000000000d546000 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=baae1a638eb3a48e474289239eea9e25 XMM02=ec2efd57dc4c00df000000000011a8a0 XMM03=17b9283820f7c698000000000011a970 XMM04=44344217694511d400000000000ae988 XMM05=0ae2972bdd46157b0000000000132048 XMM06=c291bd5c70af25b90000000000130d78 XMM07=e042d86d42eb936e0000000000121550 XMM08=17b9283820f7c698000000000011a970 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000