syzkaller login: [ 31.878370] BUG: Bad rss-counter state mm:000000000547651b type:MM_FILEPAGES val:33 [ 31.879680] BUG: Bad rss-counter state mm:000000000547651b type:MM_ANONPAGES val:22 [ 31.921703] ================================================================== [ 31.922597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.923534] Read of size 8 at addr ffff8880168493f8 by task sshd/219 [ 31.924291] [ 31.924517] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.925484] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.926444] Call Trace: [ 31.926763] [ 31.927049] dump_stack_lvl+0x91/0xf0 [ 31.927530] print_report+0xcc/0x620 [ 31.928007] ? __virt_addr_valid+0x102/0x340 [ 31.928551] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.929164] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.929773] kasan_report+0xbe/0xf0 [ 31.930251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.930868] vma_interval_tree_remove+0xc75/0xec0 [ 31.931464] vma_prepare+0xc54/0x11a0 [ 31.931947] __split_vma+0x5af/0x950 [ 31.932414] ? __pfx___split_vma+0x10/0x10 [ 31.932935] ? find_held_lock+0x2c/0x110 [ 31.933469] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.934085] ? lock_is_held_type+0x9f/0x120 [ 31.934704] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.935351] ? mtree_range_walk+0x632/0x900 [ 31.935904] ? mas_walk+0x5c7/0x7c0 [ 31.936378] do_vmi_munmap+0x1f1/0x2b0 [ 31.936869] mmap_region+0x1f9/0x2660 [ 31.937360] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.937867] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.938569] ? __pfx_lock_acquire+0x10/0x10 [ 31.939098] ? __pfx_mmap_region+0x10/0x10 [ 31.939627] ? security_mmap_addr+0x7d/0xa0 [ 31.940161] ? get_unmapped_area+0x1f5/0x3f0 [ 31.940714] do_mmap+0x854/0xf00 [ 31.941163] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.941654] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.942208] ksys_mmap_pgoff+0x3af/0x500 [ 31.942710] do_syscall_64+0x3f/0x90 [ 31.943183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.943829] RIP: 0033:0x7f5d3d748d82 [ 31.944289] 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 [ 31.946473] RSP: 002b:00007ffca1fe6418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.947408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d3d748d82 [ 31.948261] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d3cb82000 [ 31.949108] RBP: 00007f5d3cb82000 R08: 0000000000000009 R09: 0000000000001000 [ 31.949956] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3e56dad90 [ 31.950790] R13: 00007ffca1fe6430 R14: 00007ffca1fe6460 R15: 00007ffca1fe67c0 [ 31.951643] [ 31.951935] [ 31.952148] Allocated by task 212: [ 31.952579] kasan_save_stack+0x22/0x50 [ 31.953108] kasan_set_track+0x25/0x30 [ 31.953619] __kasan_slab_alloc+0x59/0x70 [ 31.954143] kmem_cache_alloc+0x16b/0x370 [ 31.954658] vm_area_dup+0x20/0x160 [ 31.955112] __split_vma+0x170/0x950 [ 31.955573] split_vma+0xc6/0x110 [ 31.956010] mprotect_fixup+0x8d2/0xb30 [ 31.956507] do_mprotect_pkey+0x87e/0xd40 [ 31.957029] __x64_sys_mprotect+0x78/0xc0 [ 31.957550] do_syscall_64+0x3f/0x90 [ 31.958024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.958668] [ 31.958884] Freed by task 212: [ 31.959273] kasan_save_stack+0x22/0x50 [ 31.959767] kasan_set_track+0x25/0x30 [ 31.960252] kasan_save_free_info+0x2b/0x50 [ 31.960773] __kasan_slab_free+0x10a/0x190 [ 31.961305] kmem_cache_free+0x10d/0x4d0 [ 31.961812] rcu_core+0x8c8/0x2860 [ 31.962251] __do_softirq+0x1b7/0x7d4 [ 31.962726] [ 31.962938] Last potentially related work creation: [ 31.963520] kasan_save_stack+0x22/0x50 [ 31.964042] __kasan_record_aux_stack+0x8e/0xa0 [ 31.964615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.965275] remove_vma+0x139/0x170 [ 31.965722] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.966278] do_vmi_munmap+0x1f1/0x2b0 [ 31.966762] __vm_munmap+0x138/0x3a0 [ 31.967230] __x64_sys_munmap+0x59/0x80 [ 31.967725] do_syscall_64+0x3f/0x90 [ 31.968223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.968862] [ 31.969091] The buggy address belongs to the object at ffff8880168493a0 [ 31.969091] which belongs to the cache vm_area_struct of size 168 [ 31.970562] The buggy address is located 88 bytes inside of [ 31.970562] freed 168-byte region [ffff8880168493a0, ffff888016849448) [ 31.971968] [ 31.972180] The buggy address belongs to the physical page: [ 31.972839] page:00000000ce6640bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16849 [ 31.973937] memcg:ffff88801a045001 [ 31.974364] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.975008] page_type: 0xffffffff() [ 31.975456] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.976365] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a045001 [ 31.977271] page dumped because: kasan: bad access detected [ 31.977929] [ 31.978144] Memory state around the buggy address: [ 31.978719] ffff888016849280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.979565] ffff888016849300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.980407] >ffff888016849380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.981276] ^ [ 31.982127] ffff888016849400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.982984] ffff888016849480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.983826] ================================================================== [ 31.984943] Disabling lock debugging due to kernel taint [ 33.844346] BUG: Bad rss-counter state mm:0000000039a53a22 type:MM_FILEPAGES val:33 [ 33.845318] BUG: Bad rss-counter state mm:0000000039a53a22 type:MM_ANONPAGES val:22 [ 34.352189] BUG: Bad rss-counter state mm:00000000feaf7207 type:MM_FILEPAGES val:33 [ 34.353178] BUG: Bad rss-counter state mm:00000000feaf7207 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47327' (ECDSA) to the list of known hosts. 2023/06/19 11:44:35 fuzzer started 2023/06/19 11:44:36 dialing manager at localhost:44161 2023/06/19 11:44:36 checking machine... 2023/06/19 11:44:36 checking revisions... [ 35.059904] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:44:36 testing simple program... [ 35.111234] cgroup: Unknown subsys name 'net' [ 35.167736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:44:34 Registers: info registers vcpu 0 RAX=0000000000091967 RBX=0000000000000001 RCX=ffffffff83863942 RDX=0000000000091967 RSI=0000000000028639 RDI=00000000001b4c35 RBP=ffff88801c8e78a0 RSP=ffff88801c8e77d8 R8 =ffffffff863dbc36 R9 =ffff88801c8e7888 R10=0000000000038001 R11=0000000000091967 R12=ffff88801c8e78a8 R13=ffff88801c8e7890 R14=ffff88801c8e7889 R15=ffff88801c8e7848 RIP=ffffffff81130843 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 00007f6e192bb900 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=00007fffeaa24000 CR3=00000000165ba000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fc282c0a9c0 CR3=00000000097e2000 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=880f5f75e7fced8b6945fbcc55334e13 XMM02=000000000011cb68ec2efd57dc4c00df XMM03=00000000001240e0fa5c32576dc1590e XMM04=497811cfca8c59ba00000000000ae988 XMM05=dfcdbad4f1609c370000000000133cf8 XMM06=806171799158d9670000000000133b80 XMM07=e042d86d42eb936e0000000000124360 XMM08=fa5c32576dc1590e000000000011cbc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000