syzkaller login: [ 30.907647] BUG: Bad rss-counter state mm:00000000179e73d9 type:MM_FILEPAGES val:33 [ 30.908655] BUG: Bad rss-counter state mm:00000000179e73d9 type:MM_ANONPAGES val:22 [ 31.030777] ================================================================== [ 31.031349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.031884] Read of size 8 at addr ffff88801738fa50 by task sshd/221 [ 31.032302] [ 31.032421] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.032894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.033471] Call Trace: [ 31.033646] [ 31.033800] dump_stack_lvl+0x91/0xf0 [ 31.034069] print_report+0xcc/0x620 [ 31.034333] ? __virt_addr_valid+0x102/0x340 [ 31.034631] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.034962] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035294] kasan_report+0xbe/0xf0 [ 31.035557] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.036178] vma_interval_tree_remove+0xc75/0xec0 [ 31.036606] vma_prepare+0xc54/0x11a0 [ 31.036953] __split_vma+0x5af/0x950 [ 31.037309] ? __pfx___split_vma+0x10/0x10 [ 31.037673] ? find_held_lock+0x2c/0x110 [ 31.038043] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.038442] ? lock_is_held_type+0x9f/0x120 [ 31.038815] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.039238] ? mtree_range_walk+0x632/0x900 [ 31.039631] ? mas_walk+0x5c7/0x7c0 [ 31.039958] do_vmi_munmap+0x1f1/0x2b0 [ 31.040294] mmap_region+0x1f9/0x2660 [ 31.040634] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.040990] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.041530] ? __pfx_lock_acquire+0x10/0x10 [ 31.041902] ? __pfx_mmap_region+0x10/0x10 [ 31.042258] ? security_mmap_addr+0x7d/0xa0 [ 31.042623] ? get_unmapped_area+0x1f5/0x3f0 [ 31.043000] do_mmap+0x854/0xf00 [ 31.043299] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.043661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.044048] ksys_mmap_pgoff+0x3af/0x500 [ 31.044407] do_syscall_64+0x3f/0x90 [ 31.044775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.045238] RIP: 0033:0x7fe3fd33ed82 [ 31.045546] 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 [ 31.046991] RSP: 002b:00007ffcbb93b928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.047603] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3fd33ed82 [ 31.048160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3fc778000 [ 31.048733] RBP: 00007fe3fc778000 R08: 0000000000000009 R09: 0000000000001000 [ 31.049325] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563724191f70 [ 31.049935] R13: 00007ffcbb93b940 R14: 00007ffcbb93b970 R15: 00007ffcbb93bcd0 [ 31.050514] [ 31.050745] [ 31.050912] Allocated by task 214: [ 31.051193] kasan_save_stack+0x22/0x50 [ 31.051551] kasan_set_track+0x25/0x30 [ 31.051881] __kasan_slab_alloc+0x59/0x70 [ 31.052251] kmem_cache_alloc+0x16b/0x370 [ 31.052614] vm_area_dup+0x20/0x160 [ 31.052916] __split_vma+0x170/0x950 [ 31.053274] split_vma+0xc6/0x110 [ 31.053581] mprotect_fixup+0x8d2/0xb30 [ 31.053912] do_mprotect_pkey+0x87e/0xd40 [ 31.054262] __x64_sys_mprotect+0x78/0xc0 [ 31.054630] do_syscall_64+0x3f/0x90 [ 31.054963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.055407] [ 31.055563] Freed by task 19: [ 31.055832] kasan_save_stack+0x22/0x50 [ 31.056181] kasan_set_track+0x25/0x30 [ 31.056526] kasan_save_free_info+0x2b/0x50 [ 31.056891] __kasan_slab_free+0x10a/0x190 [ 31.057292] kmem_cache_free+0x10d/0x4d0 [ 31.057642] rcu_core+0x8c8/0x2860 [ 31.057962] __do_softirq+0x1b7/0x7d4 [ 31.058302] [ 31.058455] Last potentially related work creation: [ 31.058865] kasan_save_stack+0x22/0x50 [ 31.059220] __kasan_record_aux_stack+0x8e/0xa0 [ 31.059668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.060124] remove_vma+0x139/0x170 [ 31.060442] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.060858] do_vmi_munmap+0x1f1/0x2b0 [ 31.061223] __vm_munmap+0x138/0x3a0 [ 31.061564] __x64_sys_munmap+0x59/0x80 [ 31.061930] do_syscall_64+0x3f/0x90 [ 31.062264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.062704] [ 31.062853] Second to last potentially related work creation: [ 31.063343] kasan_save_stack+0x22/0x50 [ 31.063728] __kasan_record_aux_stack+0x8e/0xa0 [ 31.064128] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.064601] remove_vma+0x139/0x170 [ 31.064909] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.065334] do_vmi_munmap+0x1f1/0x2b0 [ 31.065714] mmap_region+0x1f9/0x2660 [ 31.066079] do_mmap+0x854/0xf00 [ 31.066375] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.066716] ksys_mmap_pgoff+0x3af/0x500 [ 31.067055] do_syscall_64+0x3f/0x90 [ 31.067435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.067890] [ 31.068036] The buggy address belongs to the object at ffff88801738f9f8 [ 31.068036] which belongs to the cache vm_area_struct of size 168 [ 31.069063] The buggy address is located 88 bytes inside of [ 31.069063] freed 168-byte region [ffff88801738f9f8, ffff88801738faa0) [ 31.070116] [ 31.070271] The buggy address belongs to the physical page: [ 31.070740] page:000000003e6f54a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1738f [ 31.071538] memcg:ffff88800cb8d701 [ 31.071836] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.072293] page_type: 0xffffffff() [ 31.072656] raw: 0100000000000200 ffff8880087a0c80 ffffea000031ad40 dead000000000002 [ 31.073343] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb8d701 [ 31.073979] page dumped because: kasan: bad access detected [ 31.074454] [ 31.074608] Memory state around the buggy address: [ 31.075002] ffff88801738f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.075607] ffff88801738f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.076206] >ffff88801738fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.076879] ^ [ 31.077397] ffff88801738fa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.078003] ffff88801738fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.078595] ================================================================== [ 31.079268] Disabling lock debugging due to kernel taint [ 32.636137] BUG: Bad rss-counter state mm:00000000a5713492 type:MM_FILEPAGES val:33 [ 32.636848] BUG: Bad rss-counter state mm:00000000a5713492 type:MM_ANONPAGES val:22 [ 33.116540] BUG: Bad rss-counter state mm:00000000c4e7a621 type:MM_FILEPAGES val:33 [ 33.117209] BUG: Bad rss-counter state mm:00000000c4e7a621 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28913' (ECDSA) to the list of known hosts. 2023/06/21 09:44:21 fuzzer started 2023/06/21 09:44:21 dialing manager at localhost:36067 2023/06/21 09:44:21 checking machine... 2023/06/21 09:44:21 checking revisions... [ 33.613996] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:44:21 testing simple program... [ 33.658869] cgroup: Unknown subsys name 'net' [ 33.696271] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:44:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffed100d9c1368 RCX=0000000000000000 RDX=ffffffff8542a6c0 RSI=ffff88806ce09b60 RDI=ffffffff813ad470 RBP=ffff88806ce09b30 RSP=ffff88806ce09b20 R8 =0000000000000130 R9 =0000000000000000 R10=ffffed1001bdc9c8 R11=0000000000000000 R12=0000000000000000 R13=ffff88800844f780 R14=ffffffff8542a6c0 R15=ffff88800dee4ec0 RIP=ffffffff810bcfdf RFL=00000246 [---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 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=00007ffd3b2cb588 CR3=0000000015be2000 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=2030323a34343a3930203132206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a363135333420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a34343a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007ffdbb034220 RBX=0000000000000001 RCX=0000000000000070 RDX=0000000040000040 RSI=00007ffdbb034060 RDI=0000000000000000 RBP=00007ffdbb0344b0 RSP=00007ffdbb034020 R8 =0000000000000000 R9 =00007ffdbb166080 R10=00007ffdbb1660f0 R11=0000000000000000 R12=00007ffdbb0343e8 R13=0000560358149360 R14=0000000000000053 R15=0000000000000003 RIP=00005603574b8a9d RFL=00000212 [----A--] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff9b4c90900 00000000 00000000 GS =0000 0000000000000000 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=00007fcb6043d650 CR3=000000000d788000 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=a9be2e65a2fcbb806c4c6470f89173f8 XMM02=ec2efd57dc4c00df000000000011a740 XMM03=f0353ba66f3ffc87000000000011a810 XMM04=dfe3578e1b75073d00000000000ae988 XMM05=072040945e51e23e0000000000133fb8 XMM06=c291bd5c70af25b90000000000132da8 XMM07=fb795ef6d65770560000000000121cf0 XMM08=2c67c8bc2e329bc3000000000011a7b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000