syzkaller login: [ 31.547891] BUG: Bad rss-counter state mm:00000000776fa2ec type:MM_FILEPAGES val:33 [ 31.549553] BUG: Bad rss-counter state mm:00000000776fa2ec type:MM_ANONPAGES val:22 [ 31.708479] ================================================================== [ 31.709482] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.710413] Read of size 8 at addr ffff8880147da3f8 by task sshd/221 [ 31.711322] [ 31.711551] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.712403] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.713376] Call Trace: [ 31.713695] [ 31.713978] dump_stack_lvl+0x91/0xf0 [ 31.714466] print_report+0xcc/0x620 [ 31.714947] ? __virt_addr_valid+0x102/0x340 [ 31.715491] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716108] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716736] kasan_report+0xbe/0xf0 [ 31.717213] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.717837] vma_interval_tree_remove+0xc75/0xec0 [ 31.718438] vma_prepare+0xc54/0x11a0 [ 31.718916] __split_vma+0x5af/0x950 [ 31.719392] ? __pfx___split_vma+0x10/0x10 [ 31.719921] ? find_held_lock+0x2c/0x110 [ 31.720459] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.721022] ? lock_is_held_type+0x9f/0x120 [ 31.721562] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.722166] ? mtree_range_walk+0x632/0x900 [ 31.722723] ? mas_walk+0x5c7/0x7c0 [ 31.723202] do_vmi_munmap+0x1f1/0x2b0 [ 31.723691] mmap_region+0x1f9/0x2660 [ 31.724176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.724693] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.725411] ? __pfx_lock_acquire+0x10/0x10 [ 31.725949] ? __pfx_mmap_region+0x10/0x10 [ 31.726480] ? security_mmap_addr+0x7d/0xa0 [ 31.727011] ? get_unmapped_area+0x1f5/0x3f0 [ 31.727562] do_mmap+0x854/0xf00 [ 31.728000] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.728518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.729078] ksys_mmap_pgoff+0x3af/0x500 [ 31.729584] do_syscall_64+0x3f/0x90 [ 31.730065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.730708] RIP: 0033:0x7f36c0920d82 [ 31.731166] 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 [ 31.733303] RSP: 002b:00007ffebf9fbfb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.734204] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36c0920d82 [ 31.735066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36bfd5a000 [ 31.735919] RBP: 00007f36bfd5a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.736766] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645e074dec0 [ 31.737615] R13: 00007ffebf9fbfd0 R14: 00007ffebf9fc000 R15: 00007ffebf9fc360 [ 31.738463] [ 31.738754] [ 31.738969] Allocated by task 214: [ 31.739394] kasan_save_stack+0x22/0x50 [ 31.739899] kasan_set_track+0x25/0x30 [ 31.740392] __kasan_slab_alloc+0x59/0x70 [ 31.740931] kmem_cache_alloc+0x16b/0x370 [ 31.741445] vm_area_dup+0x20/0x160 [ 31.741898] __split_vma+0x170/0x950 [ 31.742365] split_vma+0xc6/0x110 [ 31.742805] mprotect_fixup+0x8d2/0xb30 [ 31.743308] do_mprotect_pkey+0x87e/0xd40 [ 31.743827] __x64_sys_mprotect+0x78/0xc0 [ 31.744342] do_syscall_64+0x3f/0x90 [ 31.744824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.745471] [ 31.745683] Freed by task 214: [ 31.746075] kasan_save_stack+0x22/0x50 [ 31.746576] kasan_set_track+0x25/0x30 [ 31.747069] kasan_save_free_info+0x2b/0x50 [ 31.747601] __kasan_slab_free+0x10a/0x190 [ 31.748136] kmem_cache_free+0x10d/0x4d0 [ 31.748650] rcu_core+0x8c8/0x2860 [ 31.749097] __do_softirq+0x1b7/0x7d4 [ 31.749575] [ 31.749790] Last potentially related work creation: [ 31.750373] kasan_save_stack+0x22/0x50 [ 31.750879] __kasan_record_aux_stack+0x8e/0xa0 [ 31.751449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.752089] remove_vma+0x139/0x170 [ 31.752622] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.753177] do_vmi_munmap+0x1f1/0x2b0 [ 31.753675] __vm_munmap+0x138/0x3a0 [ 31.754138] __x64_sys_munmap+0x59/0x80 [ 31.754641] do_syscall_64+0x3f/0x90 [ 31.755116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.755758] [ 31.755977] The buggy address belongs to the object at ffff8880147da3a0 [ 31.755977] which belongs to the cache vm_area_struct of size 168 [ 31.757471] The buggy address is located 88 bytes inside of [ 31.757471] freed 168-byte region [ffff8880147da3a0, ffff8880147da448) [ 31.758895] [ 31.759115] The buggy address belongs to the physical page: [ 31.759791] page:00000000839a60fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147da [ 31.760896] memcg:ffff88800e972801 [ 31.761325] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.761981] page_type: 0xffffffff() [ 31.762427] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.763340] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e972801 [ 31.764246] page dumped because: kasan: bad access detected [ 31.764909] [ 31.765122] Memory state around the buggy address: [ 31.765709] ffff8880147da280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.766570] ffff8880147da300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.767430] >ffff8880147da380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.768276] ^ [ 31.769140] ffff8880147da400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.769991] ffff8880147da480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.770850] ================================================================== [ 31.771865] Disabling lock debugging due to kernel taint [ 33.642693] BUG: Bad rss-counter state mm:000000001c2d7177 type:MM_FILEPAGES val:33 [ 33.643869] BUG: Bad rss-counter state mm:000000001c2d7177 type:MM_ANONPAGES val:22 [ 34.052148] BUG: Bad rss-counter state mm:000000002f450b8c type:MM_FILEPAGES val:33 [ 34.053478] BUG: Bad rss-counter state mm:000000002f450b8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42219' (ECDSA) to the list of known hosts. 2023/06/21 04:28:52 fuzzer started 2023/06/21 04:28:52 dialing manager at localhost:36067 2023/06/21 04:28:52 checking machine... 2023/06/21 04:28:52 checking revisions... [ 34.800394] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:28:52 testing simple program... [ 34.844089] cgroup: Unknown subsys name 'net' [ 34.881690] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:28:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fbd71bd1500 CR3=000000000d6fe000 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=d33b4f135bda4ca8f141ff2357da1644 XMM02=2c67c8bc2e329bc3000000000011d760 XMM03=fb795ef6d65770560000000000121f00 XMM04=7238c4068705aed100000000000ae988 XMM05=81ec4a75772c7b140000000000132bd8 XMM06=c291bd5c70af25b90000000000131c78 XMM07=e042d86d42eb936e0000000000122180 XMM08=202f88d2e9be07d2000000000011d7c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000002 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88806cf099e0 R8 =ffffffff860d8256 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc73 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 00007f4040aef900 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=00007f40410a6618 CR3=000000001719a000 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