syzkaller login: [ 58.901279] BUG: Bad rss-counter state mm:000000005a661626 type:MM_FILEPAGES val:33 [ 58.902299] BUG: Bad rss-counter state mm:000000005a661626 type:MM_ANONPAGES val:22 [ 59.006900] ================================================================== [ 59.007617] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.008326] Read of size 8 at addr ffff8880100b9798 by task sshd/221 [ 59.008921] [ 59.009090] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 59.009763] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.010737] Call Trace: [ 59.010984] [ 59.011206] dump_stack_lvl+0x91/0xf0 [ 59.011588] print_report+0xcc/0x620 [ 59.011968] ? __virt_addr_valid+0x102/0x340 [ 59.012396] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.013061] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.013926] kasan_report+0xbe/0xf0 [ 59.014561] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.015320] vma_interval_tree_remove+0xc75/0xec0 [ 59.016059] vma_prepare+0xc54/0x11a0 [ 59.016642] __split_vma+0x5af/0x950 [ 59.017229] ? __pfx___split_vma+0x10/0x10 [ 59.017883] ? find_held_lock+0x2c/0x110 [ 59.018533] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.019236] ? lock_is_held_type+0x9f/0x120 [ 59.019911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.020656] ? mtree_range_walk+0x632/0x900 [ 59.021343] ? mas_walk+0x5c7/0x7c0 [ 59.021949] do_vmi_munmap+0x1f1/0x2b0 [ 59.022489] mmap_region+0x1f9/0x2660 [ 59.023023] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.023584] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.024378] ? __pfx_lock_acquire+0x10/0x10 [ 59.024944] ? __pfx_mmap_region+0x10/0x10 [ 59.025588] ? security_mmap_addr+0x7d/0xa0 [ 59.026197] ? get_unmapped_area+0x1f5/0x3f0 [ 59.026816] do_mmap+0x854/0xf00 [ 59.027319] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.027879] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.028511] ksys_mmap_pgoff+0x3af/0x500 [ 59.029089] do_syscall_64+0x3f/0x90 [ 59.029641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.030379] RIP: 0033:0x7fdd0d41bd82 [ 59.030901] 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 [ 59.033327] RSP: 002b:00007ffdca69d6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.034350] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd0d41bd82 [ 59.035323] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd0c855000 [ 59.036291] RBP: 00007fdd0c855000 R08: 0000000000000009 R09: 0000000000001000 [ 59.037196] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577aeedab20 [ 59.038194] R13: 00007ffdca69d6e0 R14: 00007ffdca69d710 R15: 00007ffdca69da70 [ 59.039174] [ 59.039512] [ 59.039756] Allocated by task 214: [ 59.040260] kasan_save_stack+0x22/0x50 [ 59.040836] kasan_set_track+0x25/0x30 [ 59.041408] __kasan_slab_alloc+0x59/0x70 [ 59.042013] kmem_cache_alloc+0x16b/0x370 [ 59.042608] vm_area_dup+0x20/0x160 [ 59.043153] __split_vma+0x170/0x950 [ 59.043624] split_vma+0xc6/0x110 [ 59.044113] mprotect_fixup+0x8d2/0xb30 [ 59.044710] do_mprotect_pkey+0x87e/0xd40 [ 59.045316] __x64_sys_mprotect+0x78/0xc0 [ 59.045937] do_syscall_64+0x3f/0x90 [ 59.046483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.047226] [ 59.047448] Freed by task 210: [ 59.047841] kasan_save_stack+0x22/0x50 [ 59.048453] kasan_set_track+0x25/0x30 [ 59.049017] kasan_save_free_info+0x2b/0x50 [ 59.049655] __kasan_slab_free+0x10a/0x190 [ 59.050274] kmem_cache_free+0x10d/0x4d0 [ 59.050864] rcu_core+0x8c8/0x2860 [ 59.051366] __do_softirq+0x1b7/0x7d4 [ 59.051943] [ 59.052201] Last potentially related work creation: [ 59.052896] kasan_save_stack+0x22/0x50 [ 59.053510] __kasan_record_aux_stack+0x8e/0xa0 [ 59.054177] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.054916] remove_vma+0x139/0x170 [ 59.055414] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.055991] do_vmi_munmap+0x1f1/0x2b0 [ 59.056577] __vm_munmap+0x138/0x3a0 [ 59.057120] __x64_sys_munmap+0x59/0x80 [ 59.057706] do_syscall_64+0x3f/0x90 [ 59.058256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.059016] [ 59.059261] The buggy address belongs to the object at ffff8880100b9740 [ 59.059261] which belongs to the cache vm_area_struct of size 168 [ 59.060869] The buggy address is located 88 bytes inside of [ 59.060869] freed 168-byte region [ffff8880100b9740, ffff8880100b97e8) [ 59.062532] [ 59.062785] The buggy address belongs to the physical page: [ 59.063555] page:0000000083480c14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100b9 [ 59.064835] memcg:ffff88800e71f601 [ 59.065321] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.066012] page_type: 0xffffffff() [ 59.066517] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 59.067430] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e71f601 [ 59.068357] page dumped because: kasan: bad access detected [ 59.069020] [ 59.069238] Memory state around the buggy address: [ 59.069832] ffff8880100b9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.070690] ffff8880100b9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 59.071551] >ffff8880100b9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 59.072395] ^ [ 59.072888] ffff8880100b9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 59.073754] ffff8880100b9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 59.074621] ================================================================== [ 59.075682] Disabling lock debugging due to kernel taint [ 60.773809] BUG: Bad rss-counter state mm:00000000f71946ec type:MM_FILEPAGES val:33 [ 60.774437] BUG: Bad rss-counter state mm:00000000f71946ec type:MM_ANONPAGES val:22 [ 61.233286] BUG: Bad rss-counter state mm:000000006d99cd32 type:MM_FILEPAGES val:33 [ 61.234298] BUG: Bad rss-counter state mm:000000006d99cd32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12569' (ECDSA) to the list of known hosts. 2023/06/20 18:23:17 fuzzer started 2023/06/20 18:23:17 dialing manager at localhost:36067 2023/06/20 18:23:17 checking machine... 2023/06/20 18:23:17 checking revisions... [ 61.970938] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:23:17 testing simple program... [ 62.022383] cgroup: Unknown subsys name 'net' [ 62.067773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:23:16 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88800aaf0800 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000002 RDI=0000000000000005 RBP=ffff8880147dfda8 RSP=ffff8880147dfbd0 R8 =0000000000000001 R9 =0000000000000003 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000002 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c03d4 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 00007f6736a2a900 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=00007f6735e21ee0 CR3=0000000008c6e000 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=508bc2fe56a073a11849052d52a08b85 XMM02=ec2efd57dc4c00df000000000011d918 XMM03=ef76045d6cfbbd14000000000011d9e8 XMM04=09815f9eb8ce9e4500000000000ae988 XMM05=e4cb8bb95a7664b60000000000132578 XMM06=e70caf075ab894bb00000000001314c8 XMM07=e042d86d42eb936e0000000000122c80 XMM08=ef76045d6cfbbd14000000000011d9e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000091afa RBX=0000000000000001 RCX=ffffffff83868345 RDX=0000000000091afa RSI=0000000000028683 RDI=ffffffff8658b400 RBP=ffff88801bc8f410 RSP=ffff88801bc8f348 R8 =0000000000000000 R9 =ffff88801bc8f3f8 R10=0000000000038001 R11=0000000000091afa R12=ffff88801bc8f418 R13=ffff88801bc8f400 R14=ffff88801bc8f3f9 R15=ffff88801bc8f3b8 RIP=ffffffff81130837 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 00007fb2e1b8d900 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=00007fffa101b000 CR3=0000000009f60000 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