syzkaller login: [ 32.141542] BUG: Bad rss-counter state mm:000000005a869612 type:MM_FILEPAGES val:33 [ 32.142608] BUG: Bad rss-counter state mm:000000005a869612 type:MM_ANONPAGES val:22 [ 32.322148] ================================================================== [ 32.323079] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.324029] Read of size 8 at addr ffff88800e6f8a50 by task sshd/220 [ 32.324886] [ 32.325113] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.325982] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.326997] Call Trace: [ 32.327317] [ 32.327604] dump_stack_lvl+0x91/0xf0 [ 32.328098] print_report+0xcc/0x620 [ 32.328594] ? __virt_addr_valid+0x102/0x340 [ 32.329151] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.329779] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.330403] kasan_report+0xbe/0xf0 [ 32.330878] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.331498] vma_interval_tree_remove+0xc75/0xec0 [ 32.332095] vma_prepare+0xc54/0x11a0 [ 32.332579] __split_vma+0x5af/0x950 [ 32.333075] ? __pfx___split_vma+0x10/0x10 [ 32.333606] ? find_held_lock+0x2c/0x110 [ 32.334135] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.334694] ? lock_is_held_type+0x9f/0x120 [ 32.335228] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.335836] ? mtree_range_walk+0x632/0x900 [ 32.336390] ? mas_walk+0x5c7/0x7c0 [ 32.336879] do_vmi_munmap+0x1f1/0x2b0 [ 32.337379] mmap_region+0x1f9/0x2660 [ 32.337863] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.338387] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.339103] ? __pfx_lock_acquire+0x10/0x10 [ 32.339639] ? __pfx_mmap_region+0x10/0x10 [ 32.340177] ? security_mmap_addr+0x7d/0xa0 [ 32.340709] ? get_unmapped_area+0x1f5/0x3f0 [ 32.341290] do_mmap+0x854/0xf00 [ 32.341734] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.342224] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.342783] ksys_mmap_pgoff+0x3af/0x500 [ 32.343289] do_syscall_64+0x3f/0x90 [ 32.343769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.344406] RIP: 0033:0x7fdd21ef3d82 [ 32.344873] 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 [ 32.346971] RSP: 002b:00007fff1a5d70c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.347869] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd21ef3d82 [ 32.348706] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd2132d000 [ 32.349559] RBP: 00007fdd2132d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.350404] R10: 0000000000000812 R11: 0000000000000206 R12: 000055644bcdeec0 [ 32.351239] R13: 00007fff1a5d70e0 R14: 00007fff1a5d7110 R15: 00007fff1a5d7470 [ 32.352089] [ 32.352382] [ 32.352603] Allocated by task 213: [ 32.353059] kasan_save_stack+0x22/0x50 [ 32.353569] kasan_set_track+0x25/0x30 [ 32.354063] __kasan_slab_alloc+0x59/0x70 [ 32.354588] kmem_cache_alloc+0x16b/0x370 [ 32.355109] vm_area_dup+0x20/0x160 [ 32.355564] __split_vma+0x170/0x950 [ 32.356032] split_vma+0xc6/0x110 [ 32.356471] mprotect_fixup+0x8d2/0xb30 [ 32.356982] do_mprotect_pkey+0x87e/0xd40 [ 32.357499] __x64_sys_mprotect+0x78/0xc0 [ 32.358020] do_syscall_64+0x3f/0x90 [ 32.358489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.359133] [ 32.359346] Freed by task 13: [ 32.359729] kasan_save_stack+0x22/0x50 [ 32.360227] kasan_set_track+0x25/0x30 [ 32.360724] kasan_save_free_info+0x2b/0x50 [ 32.361281] __kasan_slab_free+0x10a/0x190 [ 32.361821] kmem_cache_free+0x10d/0x4d0 [ 32.362326] rcu_core+0x8c8/0x2860 [ 32.362770] __do_softirq+0x1b7/0x7d4 [ 32.363248] [ 32.363462] Last potentially related work creation: [ 32.364052] kasan_save_stack+0x22/0x50 [ 32.364555] __kasan_record_aux_stack+0x8e/0xa0 [ 32.365140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.365778] remove_vma+0x139/0x170 [ 32.366226] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.366781] do_vmi_munmap+0x1f1/0x2b0 [ 32.367262] __vm_munmap+0x138/0x3a0 [ 32.367726] __x64_sys_munmap+0x59/0x80 [ 32.368222] do_syscall_64+0x3f/0x90 [ 32.368696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.369362] [ 32.369579] The buggy address belongs to the object at ffff88800e6f89f8 [ 32.369579] which belongs to the cache vm_area_struct of size 168 [ 32.371046] The buggy address is located 88 bytes inside of [ 32.371046] freed 168-byte region [ffff88800e6f89f8, ffff88800e6f8aa0) [ 32.372453] [ 32.372669] The buggy address belongs to the physical page: [ 32.373354] page:00000000385b6e3b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6f8 [ 32.374449] memcg:ffff88800c655c01 [ 32.374884] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.375545] page_type: 0xffffffff() [ 32.375996] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.376936] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c655c01 [ 32.377854] page dumped because: kasan: bad access detected [ 32.378512] [ 32.378728] Memory state around the buggy address: [ 32.379307] ffff88800e6f8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.380157] ffff88800e6f8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.381029] >ffff88800e6f8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.381869] ^ [ 32.382559] ffff88800e6f8a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.383406] ffff88800e6f8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.384249] ================================================================== [ 32.385271] Disabling lock debugging due to kernel taint [ 34.354738] BUG: Bad rss-counter state mm:00000000ffcf338e type:MM_FILEPAGES val:33 [ 34.355682] BUG: Bad rss-counter state mm:00000000ffcf338e type:MM_ANONPAGES val:22 [ 34.828510] BUG: Bad rss-counter state mm:00000000063ca575 type:MM_FILEPAGES val:33 [ 34.830672] BUG: Bad rss-counter state mm:00000000063ca575 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54030' (ECDSA) to the list of known hosts. 2023/06/20 01:15:23 fuzzer started 2023/06/20 01:15:23 dialing manager at localhost:44161 2023/06/20 01:15:23 checking machine... 2023/06/20 01:15:23 checking revisions... [ 35.534299] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:15:23 testing simple program... [ 35.576756] cgroup: Unknown subsys name 'net' [ 35.619794] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:15:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000053 RCX=ffff88801581fe70 RDX=ffff888015820000 RSI=ffffffff8369868a RDI=ffff888018333490 RBP=0000000000000053 RSP=ffff88801581f8e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000053 R11=0000000000000000 R12=ffff88800ee32800 R13=0000000000000053 R14=ffff88801581fe70 R15=ffff8880183333c0 RIP=ffffffff8369868f RFL=00000293 [--S-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 00007f1cd9e09900 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=00007f1cd9276960 CR3=000000001418a000 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=5df6471401a19f8e614eb85e48de80d2 XMM02=eff9b2d0a8fce9cb000000000011c6f0 XMM03=2c67c8bc2e329bc3000000000011c818 XMM04=1e2b3498a1bd34a400000000000ae988 XMM05=56d3d537919e932700000000001348e8 XMM06=19e9129bd510f2350000000000133780 XMM07=fb795ef6d65770560000000000123c80 XMM08=2c67c8bc2e329bc3000000000011c818 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016bb4ab0 RCX=ffff88800844f780 RDX=ffffea00005aed00 RSI=ffff888016bb4850 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88800f05fa38 R8 =ffff888016bb4720 R9 =0000000000000000 R10=ffffea00005aed00 R11=00000000000d0005 R12=dffffc0000000000 R13=ffff88800f05fa78 R14=ffff88800844f780 R15=ffff888016bb4850 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007fe6ee428900 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=00007ffcecefb000 CR3=000000000e544000 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