syzkaller login: [ 29.897759] sshd (214) used greatest stack depth: 24128 bytes left [ 29.898872] BUG: Bad rss-counter state mm:0000000040a77768 type:MM_FILEPAGES val:33 [ 29.899607] BUG: Bad rss-counter state mm:0000000040a77768 type:MM_ANONPAGES val:22 [ 30.031136] ================================================================== [ 30.031820] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.032508] Read of size 8 at addr ffff88800d4745c8 by task sshd/221 [ 30.033047] [ 30.033229] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.033820] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.034484] Call Trace: [ 30.034710] [ 30.034910] dump_stack_lvl+0x91/0xf0 [ 30.035437] print_report+0xcc/0x620 [ 30.035883] ? __virt_addr_valid+0x102/0x340 [ 30.036259] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.036686] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.037112] kasan_report+0xbe/0xf0 [ 30.037460] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.037899] vma_interval_tree_remove+0xc75/0xec0 [ 30.038320] vma_prepare+0xc54/0x11a0 [ 30.038654] __split_vma+0x5af/0x950 [ 30.038987] ? __pfx___split_vma+0x10/0x10 [ 30.039327] ? find_held_lock+0x2c/0x110 [ 30.039706] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.040117] ? lock_is_held_type+0x9f/0x120 [ 30.040485] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.040895] ? mtree_range_walk+0x632/0x900 [ 30.041300] ? mas_walk+0x5c7/0x7c0 [ 30.041631] do_vmi_munmap+0x1f1/0x2b0 [ 30.041989] mmap_region+0x1f9/0x2660 [ 30.042329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.042683] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.043177] ? __pfx_lock_acquire+0x10/0x10 [ 30.043554] ? __pfx_mmap_region+0x10/0x10 [ 30.043936] ? security_mmap_addr+0x7d/0xa0 [ 30.044309] ? get_unmapped_area+0x1f5/0x3f0 [ 30.044698] do_mmap+0x854/0xf00 [ 30.045008] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.045401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.045795] ksys_mmap_pgoff+0x3af/0x500 [ 30.046152] do_syscall_64+0x3f/0x90 [ 30.046490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.046938] RIP: 0033:0x7f9adc39cd82 [ 30.047258] 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 [ 30.048740] RSP: 002b:00007ffd723c8328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.049392] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9adc39cd82 [ 30.049969] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9adb7d6000 [ 30.050546] RBP: 00007f9adb7d6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.051174] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d5296eec0 [ 30.051758] R13: 00007ffd723c8340 R14: 00007ffd723c8370 R15: 00007ffd723c86d0 [ 30.052378] [ 30.052584] [ 30.052730] Allocated by task 214: [ 30.053029] kasan_save_stack+0x22/0x50 [ 30.053436] kasan_set_track+0x25/0x30 [ 30.053771] __kasan_slab_alloc+0x59/0x70 [ 30.054127] kmem_cache_alloc+0x16b/0x370 [ 30.054477] vm_area_dup+0x20/0x160 [ 30.054799] __split_vma+0x170/0x950 [ 30.055119] split_vma+0xc6/0x110 [ 30.055424] mprotect_fixup+0x8d2/0xb30 [ 30.055777] do_mprotect_pkey+0x87e/0xd40 [ 30.056133] __x64_sys_mprotect+0x78/0xc0 [ 30.056487] do_syscall_64+0x3f/0x90 [ 30.056819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.057278] [ 30.057429] Freed by task 204: [ 30.057700] kasan_save_stack+0x22/0x50 [ 30.058037] kasan_set_track+0x25/0x30 [ 30.058377] kasan_save_free_info+0x2b/0x50 [ 30.058745] __kasan_slab_free+0x10a/0x190 [ 30.059106] kmem_cache_free+0x10d/0x4d0 [ 30.059461] rcu_core+0x8c8/0x2860 [ 30.059771] __do_softirq+0x1b7/0x7d4 [ 30.060099] [ 30.060252] Last potentially related work creation: [ 30.060655] kasan_save_stack+0x22/0x50 [ 30.061008] __kasan_record_aux_stack+0x8e/0xa0 [ 30.061458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.061907] remove_vma+0x139/0x170 [ 30.062218] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.062599] do_vmi_munmap+0x1f1/0x2b0 [ 30.062928] __vm_munmap+0x138/0x3a0 [ 30.063245] __x64_sys_munmap+0x59/0x80 [ 30.063580] do_syscall_64+0x3f/0x90 [ 30.063910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.064354] [ 30.064500] The buggy address belongs to the object at ffff88800d474570 [ 30.064500] which belongs to the cache vm_area_struct of size 168 [ 30.065540] The buggy address is located 88 bytes inside of [ 30.065540] freed 168-byte region [ffff88800d474570, ffff88800d474618) [ 30.066500] [ 30.066651] The buggy address belongs to the physical page: [ 30.067095] page:00000000d426330f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd474 [ 30.067848] memcg:ffff88800f132901 [ 30.068141] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.068579] page_type: 0xffffffff() [ 30.068891] raw: 0100000000000200 ffff8880087a0c80 ffffea0000266a80 dead000000000008 [ 30.069566] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f132901 [ 30.070195] page dumped because: kasan: bad access detected [ 30.070671] [ 30.070823] Memory state around the buggy address: [ 30.071234] ffff88800d474480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.071825] ffff88800d474500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.072412] >ffff88800d474580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.072988] ^ [ 30.073491] ffff88800d474600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.074068] ffff88800d474680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.074655] ================================================================== [ 30.075379] Disabling lock debugging due to kernel taint [ 31.547458] BUG: Bad rss-counter state mm:0000000007446343 type:MM_FILEPAGES val:33 [ 31.548177] BUG: Bad rss-counter state mm:0000000007446343 type:MM_ANONPAGES val:22 [ 31.921506] BUG: Bad rss-counter state mm:000000007aade40a type:MM_FILEPAGES val:33 [ 31.922182] BUG: Bad rss-counter state mm:000000007aade40a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10463' (ECDSA) to the list of known hosts. 2023/06/21 09:32:19 fuzzer started 2023/06/21 09:32:20 dialing manager at localhost:36067 2023/06/21 09:32:20 checking machine... 2023/06/21 09:32:20 checking revisions... [ 32.504925] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:32:20 testing simple program... [ 32.544156] cgroup: Unknown subsys name 'net' [ 32.578607] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:32:19 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88801a26ec00 RCX=ffff88801a26ec00 RDX=0000000000100010 RSI=ffff88801a26ec00 RDI=ffff8880084c6140 RBP=ffff888015bff908 RSP=ffff888015bff870 R8 =000000008010000f R9 =0000000000000000 R10=ffffea0000689b80 R11=000000000010000f R12=ffffea0000689b80 R13=0000000000000000 R14=000000000010000f R15=ffff8880084c6140 RIP=ffffffff81809672 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 00007f7553fff700 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=00007fbc1939e650 CR3=000000000e622000 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=2039313a32333a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a32333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800cc602c8 RCX=ffffffff812e0135 RDX=1ffff1100198c05b RSI=ffffffff87b89f80 RDI=ffff88800cc602d8 RBP=ffff88800cc602c8 RSP=ffff88800f197868 R8 =0000000000000001 R9 =ffffed1001e32f05 R10=0000000000000003 R11=00030009ff02000a R12=ffff88800cc602c8 R13=ffff88801420e8b8 R14=0000000000000000 R15=ffffffff87b89f80 RIP=ffffffff844d29cb 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 00007fbc18de9900 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=00007fbc193a0618 CR3=000000000dad8000 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