syzkaller login: [ 50.044550] BUG: Bad rss-counter state mm:0000000066b80c0f type:MM_FILEPAGES val:33 [ 50.045636] BUG: Bad rss-counter state mm:0000000066b80c0f type:MM_ANONPAGES val:22 [ 50.087562] ================================================================== [ 50.088714] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.089922] Read of size 8 at addr ffff888015b74ed8 by task sshd/221 [ 50.090830] [ 50.091097] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.092155] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.093378] Call Trace: [ 50.093737] [ 50.094093] dump_stack_lvl+0x91/0xf0 [ 50.094698] print_report+0xcc/0x620 [ 50.095278] ? __virt_addr_valid+0x102/0x340 [ 50.095827] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.096619] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.097252] kasan_report+0xbe/0xf0 [ 50.097739] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.098383] vma_interval_tree_remove+0xc75/0xec0 [ 50.099134] vma_prepare+0xc54/0x11a0 [ 50.099710] __split_vma+0x5af/0x950 [ 50.100311] ? __pfx___split_vma+0x10/0x10 [ 50.100928] ? find_held_lock+0x2c/0x110 [ 50.101456] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.102024] ? lock_is_held_type+0x9f/0x120 [ 50.102574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.103174] ? mtree_range_walk+0x632/0x900 [ 50.103723] ? mas_walk+0x5c7/0x7c0 [ 50.104203] do_vmi_munmap+0x1f1/0x2b0 [ 50.104692] mmap_region+0x1f9/0x2660 [ 50.105188] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.105706] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.106418] ? __pfx_lock_acquire+0x10/0x10 [ 50.106951] ? __pfx_mmap_region+0x10/0x10 [ 50.107493] ? security_mmap_addr+0x7d/0xa0 [ 50.108023] ? get_unmapped_area+0x1f5/0x3f0 [ 50.108580] do_mmap+0x854/0xf00 [ 50.109046] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.109547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.110115] ksys_mmap_pgoff+0x3af/0x500 [ 50.110624] do_syscall_64+0x3f/0x90 [ 50.111105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.111750] RIP: 0033:0x7fe1004d0d82 [ 50.112204] 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 [ 50.114340] RSP: 002b:00007ffdd49d9c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.115279] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1004d0d82 [ 50.116140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe0ff90a000 [ 50.117001] RBP: 00007fe0ff90a000 R08: 0000000000000009 R09: 0000000000001000 [ 50.117853] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614f2b9cd90 [ 50.118699] R13: 00007ffdd49d9cb0 R14: 00007ffdd49d9ce0 R15: 00007ffdd49da040 [ 50.119569] [ 50.119877] [ 50.120090] Allocated by task 214: [ 50.120534] kasan_save_stack+0x22/0x50 [ 50.121061] kasan_set_track+0x25/0x30 [ 50.121559] __kasan_slab_alloc+0x59/0x70 [ 50.122085] kmem_cache_alloc+0x16b/0x370 [ 50.122610] vm_area_dup+0x20/0x160 [ 50.123071] __split_vma+0x170/0x950 [ 50.123539] split_vma+0xc6/0x110 [ 50.123975] mprotect_fixup+0x8d2/0xb30 [ 50.124481] do_mprotect_pkey+0x87e/0xd40 [ 50.125017] __x64_sys_mprotect+0x78/0xc0 [ 50.125537] do_syscall_64+0x3f/0x90 [ 50.126016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.126658] [ 50.126872] Freed by task 203: [ 50.127268] kasan_save_stack+0x22/0x50 [ 50.127768] kasan_set_track+0x25/0x30 [ 50.128265] kasan_save_free_info+0x2b/0x50 [ 50.128906] __kasan_slab_free+0x10a/0x190 [ 50.129437] kmem_cache_free+0x10d/0x4d0 [ 50.129941] rcu_core+0x8c8/0x2860 [ 50.130389] __do_softirq+0x1b7/0x7d4 [ 50.130862] [ 50.131084] Last potentially related work creation: [ 50.131665] kasan_save_stack+0x22/0x50 [ 50.132167] __kasan_record_aux_stack+0x8e/0xa0 [ 50.132739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.133393] remove_vma+0x139/0x170 [ 50.133844] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.134408] do_vmi_munmap+0x1f1/0x2b0 [ 50.134889] __vm_munmap+0x138/0x3a0 [ 50.135356] __x64_sys_munmap+0x59/0x80 [ 50.135855] do_syscall_64+0x3f/0x90 [ 50.136332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.136977] [ 50.137191] The buggy address belongs to the object at ffff888015b74e80 [ 50.137191] which belongs to the cache vm_area_struct of size 168 [ 50.138654] The buggy address is located 88 bytes inside of [ 50.138654] freed 168-byte region [ffff888015b74e80, ffff888015b74f28) [ 50.140059] [ 50.140274] The buggy address belongs to the physical page: [ 50.140947] page:00000000c309311e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b74 [ 50.142043] memcg:ffff88800de9ad01 [ 50.142479] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.143129] page_type: 0xffffffff() [ 50.143577] raw: 0100000000000200 ffff88800879fc80 ffffea00003a13c0 dead000000000004 [ 50.144498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de9ad01 [ 50.145413] page dumped because: kasan: bad access detected [ 50.146067] [ 50.146282] Memory state around the buggy address: [ 50.146864] ffff888015b74d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 50.147723] ffff888015b74e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 50.148585] >ffff888015b74e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.149447] ^ [ 50.150178] ffff888015b74f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 50.151029] ffff888015b74f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.151884] ================================================================== [ 50.152902] Disabling lock debugging due to kernel taint [ 52.306322] BUG: Bad rss-counter state mm:000000006fcff542 type:MM_FILEPAGES val:33 [ 52.307496] BUG: Bad rss-counter state mm:000000006fcff542 type:MM_ANONPAGES val:22 [ 52.756458] BUG: Bad rss-counter state mm:000000002278f1b8 type:MM_FILEPAGES val:33 [ 52.757922] BUG: Bad rss-counter state mm:000000002278f1b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11417' (ECDSA) to the list of known hosts. 2023/06/19 18:01:05 fuzzer started 2023/06/19 18:01:06 dialing manager at localhost:44161 2023/06/19 18:01:06 checking machine... 2023/06/19 18:01:06 checking revisions... [ 53.470220] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:01:06 testing simple program... [ 53.514779] cgroup: Unknown subsys name 'net' [ 53.566557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:00:46 Registers: info registers vcpu 0 RAX=00000000000000ba RBX=000056481c545360 RCX=00007fd268430d47 RDX=00000000ffffffff RSI=ffffffffffffffff RDI=000056481c545360 RBP=0000000000000058 RSP=00007ffd2152d5b8 R8 =00000000649097e1 R9 =00007ffd215c2080 R10=00007ffd215c2080 R11=0000000000000202 R12=0000000000000058 R13=ffffffffffffffff R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84600007 RFL=00000002 [-------] 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 00007fd267b67900 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=00007fd266f6ef40 CR3=000000000d68a000 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=b3285ca56c489dff000000000010d370 XMM01=385f73d3c255c68ec342e784cb61174e XMM02=ec2efd57dc4c00df000000000011cc20 XMM03=f38bab84ed706c30000000000011ccf0 XMM04=843e3858e6567daf00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134178 XMM06=7273deb834c68d730000000000132fe0 XMM07=e042d86d42eb936e0000000000124858 XMM08=f38bab84ed706c30000000000011ccf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8136ab8d RBP=ffffffff8136ab8d RSP=ffff888008e57d00 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffffffff85616740 R13=0000000000000246 R14=0000000000007919 R15=ffff88806cf3a2d2 RIP=ffffffff8153422b RFL=00000046 [---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 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=00007ffe5eda9000 CR3=000000000e484000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000