syzkaller login: [ 31.124821] BUG: Bad rss-counter state mm:0000000097041730 type:MM_FILEPAGES val:33 [ 31.125834] BUG: Bad rss-counter state mm:0000000097041730 type:MM_ANONPAGES val:22 [ 31.288904] ================================================================== [ 31.289921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.290957] Read of size 8 at addr ffff88800ba594e0 by task sshd/221 [ 31.291814] [ 31.292105] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.293084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.294156] Call Trace: [ 31.294504] [ 31.294821] dump_stack_lvl+0x91/0xf0 [ 31.295383] print_report+0xcc/0x620 [ 31.295912] ? __virt_addr_valid+0x102/0x340 [ 31.296521] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.297204] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.297890] kasan_report+0xbe/0xf0 [ 31.298420] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299112] vma_interval_tree_remove+0xc75/0xec0 [ 31.299793] vma_prepare+0xc54/0x11a0 [ 31.300323] __split_vma+0x5af/0x950 [ 31.300843] ? __pfx___split_vma+0x10/0x10 [ 31.301424] ? find_held_lock+0x2c/0x110 [ 31.302005] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.302628] ? lock_is_held_type+0x9f/0x120 [ 31.303247] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.303922] ? mtree_range_walk+0x632/0x900 [ 31.304541] ? mas_walk+0x5c7/0x7c0 [ 31.305070] do_vmi_munmap+0x1f1/0x2b0 [ 31.305616] mmap_region+0x1f9/0x2660 [ 31.306149] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.306733] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.307544] ? __pfx_lock_acquire+0x10/0x10 [ 31.308127] ? __pfx_mmap_region+0x10/0x10 [ 31.308715] ? security_mmap_addr+0x7d/0xa0 [ 31.309291] ? get_unmapped_area+0x1f5/0x3f0 [ 31.309892] do_mmap+0x854/0xf00 [ 31.310380] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.310936] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.311571] ksys_mmap_pgoff+0x3af/0x500 [ 31.312124] do_syscall_64+0x3f/0x90 [ 31.312659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313386] RIP: 0033:0x7f988b1d7d82 [ 31.313903] 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 [ 31.316278] RSP: 002b:00007ffd2799d958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.317299] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f988b1d7d82 [ 31.318242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f988a611000 [ 31.319191] RBP: 00007f988a611000 R08: 0000000000000009 R09: 0000000000001000 [ 31.320130] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c34ec48f60 [ 31.321052] R13: 00007ffd2799d970 R14: 00007ffd2799d9a0 R15: 00007ffd2799dd00 [ 31.322013] [ 31.322337] [ 31.322575] Allocated by task 214: [ 31.323043] kasan_save_stack+0x22/0x50 [ 31.323640] kasan_set_track+0x25/0x30 [ 31.324186] __kasan_slab_alloc+0x59/0x70 [ 31.324764] kmem_cache_alloc+0x16b/0x370 [ 31.325340] vm_area_dup+0x20/0x160 [ 31.325841] __split_vma+0x170/0x950 [ 31.326354] split_vma+0xc6/0x110 [ 31.326830] mprotect_fixup+0x8d2/0xb30 [ 31.327399] do_mprotect_pkey+0x87e/0xd40 [ 31.327978] __x64_sys_mprotect+0x78/0xc0 [ 31.328555] do_syscall_64+0x3f/0x90 [ 31.329069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.329783] [ 31.330021] Freed by task 214: [ 31.330457] kasan_save_stack+0x22/0x50 [ 31.331028] kasan_set_track+0x25/0x30 [ 31.331598] kasan_save_free_info+0x2b/0x50 [ 31.332153] __kasan_slab_free+0x10a/0x190 [ 31.332724] kmem_cache_free+0x10d/0x4d0 [ 31.333261] rcu_core+0x8c8/0x2860 [ 31.333740] __do_softirq+0x1b7/0x7d4 [ 31.334242] [ 31.334474] Last potentially related work creation: [ 31.335091] kasan_save_stack+0x22/0x50 [ 31.335627] __kasan_record_aux_stack+0x8e/0xa0 [ 31.336250] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.336935] remove_vma+0x139/0x170 [ 31.337407] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.337998] do_vmi_munmap+0x1f1/0x2b0 [ 31.338516] __vm_munmap+0x138/0x3a0 [ 31.339010] __x64_sys_munmap+0x59/0x80 [ 31.339548] do_syscall_64+0x3f/0x90 [ 31.340055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.340743] [ 31.340974] The buggy address belongs to the object at ffff88800ba59488 [ 31.340974] which belongs to the cache vm_area_struct of size 168 [ 31.342549] The buggy address is located 88 bytes inside of [ 31.342549] freed 168-byte region [ffff88800ba59488, ffff88800ba59530) [ 31.344055] [ 31.344293] The buggy address belongs to the physical page: [ 31.345007] page:00000000ffe8aeb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xba59 [ 31.346158] memcg:ffff88800b82fa01 [ 31.346608] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.347301] page_type: 0xffffffff() [ 31.347779] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.348764] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b82fa01 [ 31.349726] page dumped because: kasan: bad access detected [ 31.350422] [ 31.350654] Memory state around the buggy address: [ 31.351275] ffff88800ba59380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.352184] ffff88800ba59400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.353097] >ffff88800ba59480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.354006] ^ [ 31.354803] ffff88800ba59500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.355736] ffff88800ba59580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.356648] ================================================================== [ 31.357684] Disabling lock debugging due to kernel taint [ 33.264940] BUG: Bad rss-counter state mm:00000000e45b7481 type:MM_FILEPAGES val:33 [ 33.266444] BUG: Bad rss-counter state mm:00000000e45b7481 type:MM_ANONPAGES val:22 [ 33.664643] BUG: Bad rss-counter state mm:00000000bcd320a6 type:MM_FILEPAGES val:33 [ 33.665548] BUG: Bad rss-counter state mm:00000000bcd320a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14894' (ECDSA) to the list of known hosts. 2023/06/20 18:42:32 fuzzer started 2023/06/20 18:42:32 dialing manager at localhost:36067 2023/06/20 18:42:32 checking machine... 2023/06/20 18:42:32 checking revisions... [ 34.404126] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:42:32 testing simple program... [ 34.456983] cgroup: Unknown subsys name 'net' [ 34.506930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:42:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801ce2f1f0 RCX=ffff88801ce2f1f8 RDX=1ffff110039c5e2b RSI=ffff88801ce2f128 RDI=ffff88801ce2f158 RBP=dffffc0000000000 RSP=ffff88801ce2f098 R8 =0000000000000001 R9 =ffff88801ce2f198 R10=0000000000038001 R11=0000000000006097 R12=ffffed10039c5e2d R13=ffffed10039c5e2c R14=ffff88801ce2f1a0 R15=ffff88801ce2f158 RIP=ffffffff811305fa RFL=00000292 [--S-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 00007f959b7d9900 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=00007f959bd90618 CR3=0000000009878000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f383d13f620 CR3=000000001460c000 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=2031333a32343a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a32343a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000