syzkaller login: [ 30.806892] BUG: Bad rss-counter state mm:00000000965400a5 type:MM_FILEPAGES val:33 [ 30.808441] BUG: Bad rss-counter state mm:00000000965400a5 type:MM_ANONPAGES val:22 [ 30.957570] ================================================================== [ 30.958439] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.959325] Read of size 8 at addr ffff88800eea0ed8 by task sshd/220 [ 30.960200] [ 30.960424] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.961233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.962169] Call Trace: [ 30.962491] [ 30.962762] dump_stack_lvl+0x91/0xf0 [ 30.963229] print_report+0xcc/0x620 [ 30.963690] ? __virt_addr_valid+0x102/0x340 [ 30.964214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.964803] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.965384] kasan_report+0xbe/0xf0 [ 30.965845] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.966435] vma_interval_tree_remove+0xc75/0xec0 [ 30.967002] vma_prepare+0xc54/0x11a0 [ 30.967454] __split_vma+0x5af/0x950 [ 30.967904] ? __pfx___split_vma+0x10/0x10 [ 30.968402] ? find_held_lock+0x2c/0x110 [ 30.968900] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.969440] ? lock_is_held_type+0x9f/0x120 [ 30.969991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.970595] ? mtree_range_walk+0x632/0x900 [ 30.971149] ? mas_walk+0x5c7/0x7c0 [ 30.971616] do_vmi_munmap+0x1f1/0x2b0 [ 30.972107] mmap_region+0x1f9/0x2660 [ 30.972597] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.973107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.973849] ? __pfx_lock_acquire+0x10/0x10 [ 30.974383] ? __pfx_mmap_region+0x10/0x10 [ 30.974905] ? security_mmap_addr+0x7d/0xa0 [ 30.975432] ? get_unmapped_area+0x1f5/0x3f0 [ 30.975984] do_mmap+0x854/0xf00 [ 30.976419] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.976910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.977469] ksys_mmap_pgoff+0x3af/0x500 [ 30.977983] do_syscall_64+0x3f/0x90 [ 30.978469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.979102] RIP: 0033:0x7eff2b1e8d82 [ 30.979557] 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 [ 30.981866] RSP: 002b:00007ffcd13e9628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.982994] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff2b1e8d82 [ 30.984044] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff2a622000 [ 30.985097] RBP: 00007eff2a622000 R08: 0000000000000009 R09: 0000000000001000 [ 30.986179] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd1dab1d90 [ 30.987230] R13: 00007ffcd13e9640 R14: 00007ffcd13e9670 R15: 00007ffcd13e99d0 [ 30.988289] [ 30.988655] [ 30.988922] Allocated by task 213: [ 30.989447] kasan_save_stack+0x22/0x50 [ 30.990094] kasan_set_track+0x25/0x30 [ 30.990706] __kasan_slab_alloc+0x59/0x70 [ 30.991361] kmem_cache_alloc+0x16b/0x370 [ 30.992007] vm_area_dup+0x20/0x160 [ 30.992549] __split_vma+0x170/0x950 [ 30.993103] split_vma+0xc6/0x110 [ 30.993630] mprotect_fixup+0x8d2/0xb30 [ 30.994216] do_mprotect_pkey+0x87e/0xd40 [ 30.994840] __x64_sys_mprotect+0x78/0xc0 [ 30.995457] do_syscall_64+0x3f/0x90 [ 30.996023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.996783] [ 30.997036] Freed by task 213: [ 30.997504] kasan_save_stack+0x22/0x50 [ 30.998124] kasan_set_track+0x25/0x30 [ 30.998643] kasan_save_free_info+0x2b/0x50 [ 30.999174] __kasan_slab_free+0x10a/0x190 [ 30.999697] kmem_cache_free+0x10d/0x4d0 [ 31.000200] rcu_core+0x8c8/0x2860 [ 31.000649] __do_softirq+0x1b7/0x7d4 [ 31.001211] [ 31.001446] Last potentially related work creation: [ 31.002039] kasan_save_stack+0x22/0x50 [ 31.002534] __kasan_record_aux_stack+0x8e/0xa0 [ 31.003099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.003737] remove_vma+0x139/0x170 [ 31.004192] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.004747] do_vmi_munmap+0x1f1/0x2b0 [ 31.005226] __vm_munmap+0x138/0x3a0 [ 31.005704] __x64_sys_munmap+0x59/0x80 [ 31.006203] do_syscall_64+0x3f/0x90 [ 31.006684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.007324] [ 31.007537] The buggy address belongs to the object at ffff88800eea0e80 [ 31.007537] which belongs to the cache vm_area_struct of size 168 [ 31.008982] The buggy address is located 88 bytes inside of [ 31.008982] freed 168-byte region [ffff88800eea0e80, ffff88800eea0f28) [ 31.010393] [ 31.010614] The buggy address belongs to the physical page: [ 31.011266] page:000000005f27de93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeea0 [ 31.012337] memcg:ffff88800ed64b01 [ 31.012759] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.013399] page_type: 0xffffffff() [ 31.013867] raw: 0100000000000200 ffff8880087a0c80 ffffea000038f0c0 dead000000000006 [ 31.014771] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed64b01 [ 31.015665] page dumped because: kasan: bad access detected [ 31.016316] [ 31.016540] Memory state around the buggy address: [ 31.017120] ffff88800eea0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.017979] ffff88800eea0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.018820] >ffff88800eea0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.019658] ^ [ 31.020371] ffff88800eea0f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.021208] ffff88800eea0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.022071] ================================================================== [ 31.023067] Disabling lock debugging due to kernel taint [ 33.230119] BUG: Bad rss-counter state mm:000000003bf4e91a type:MM_FILEPAGES val:33 [ 33.231173] BUG: Bad rss-counter state mm:000000003bf4e91a type:MM_ANONPAGES val:22 [ 33.634924] BUG: Bad rss-counter state mm:000000005b5804aa type:MM_FILEPAGES val:33 [ 33.636111] BUG: Bad rss-counter state mm:000000005b5804aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32131' (ECDSA) to the list of known hosts. 2023/06/20 16:17:19 fuzzer started 2023/06/20 16:17:19 dialing manager at localhost:36067 2023/06/20 16:17:19 checking machine... 2023/06/20 16:17:19 checking revisions... [ 34.333623] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:17:19 testing simple program... [ 34.375736] cgroup: Unknown subsys name 'net' [ 34.421600] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:17:19 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=0000000000000001 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=00007ffc99d7e848 CR3=0000000005482000 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=00007f2587710510000055f231848790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc1180 RBX=ffffffff85e08c00 RCX=ffffffff818abfa1 RDX=0000000000000000 RSI=ffffffff8614904a RDI=ffffffff85e08bf0 RBP=ffffffff85e08bf0 RSP=ffff888016d3f8d0 R8 =ffffffff8614904a R9 =ffff888016d3f9c8 R10=0000000000038001 R11=000000000002388b R12=ffffffff85e08c14 R13=ffffffff85e08bf0 R14=ffffffff85e08bf0 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007fc362a00900 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=00007ffd60246000 CR3=000000000e4e8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000