syzkaller login: [ 30.868609] BUG: Bad rss-counter state mm:0000000035eae6e8 type:MM_FILEPAGES val:33 [ 30.870052] BUG: Bad rss-counter state mm:0000000035eae6e8 type:MM_ANONPAGES val:22 [ 30.921724] ================================================================== [ 30.922643] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.923561] Read of size 8 at addr ffff88800fd35058 by task sshd/220 [ 30.924309] [ 30.924540] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.925392] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.926348] Call Trace: [ 30.926666] [ 30.926954] dump_stack_lvl+0x91/0xf0 [ 30.927439] print_report+0xcc/0x620 [ 30.927917] ? __virt_addr_valid+0x102/0x340 [ 30.928463] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.929095] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.929733] kasan_report+0xbe/0xf0 [ 30.930188] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.930766] vma_interval_tree_remove+0xc75/0xec0 [ 30.931338] vma_prepare+0xc54/0x11a0 [ 30.931800] __split_vma+0x5af/0x950 [ 30.932246] ? __pfx___split_vma+0x10/0x10 [ 30.932758] ? find_held_lock+0x2c/0x110 [ 30.933250] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.933798] ? lock_is_held_type+0x9f/0x120 [ 30.934334] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.934943] ? mtree_range_walk+0x632/0x900 [ 30.935533] ? mas_walk+0x5c7/0x7c0 [ 30.936068] do_vmi_munmap+0x1f1/0x2b0 [ 30.936640] mmap_region+0x1f9/0x2660 [ 30.937169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.937721] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.938418] ? __pfx_lock_acquire+0x10/0x10 [ 30.938933] ? __pfx_mmap_region+0x10/0x10 [ 30.939447] ? security_mmap_addr+0x7d/0xa0 [ 30.939983] ? get_unmapped_area+0x1f5/0x3f0 [ 30.940514] do_mmap+0x854/0xf00 [ 30.940960] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.941504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.942093] ksys_mmap_pgoff+0x3af/0x500 [ 30.942637] do_syscall_64+0x3f/0x90 [ 30.943140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.943823] RIP: 0033:0x7f1505164d82 [ 30.944310] 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 [ 30.946552] RSP: 002b:00007ffe951c81a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.947485] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1505164d82 [ 30.948410] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f150459e000 [ 30.949306] RBP: 00007f150459e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.950229] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ade391d90 [ 30.951095] R13: 00007ffe951c81c0 R14: 00007ffe951c81f0 R15: 00007ffe951c8550 [ 30.952014] [ 30.952344] [ 30.952596] Allocated by task 213: [ 30.953068] kasan_save_stack+0x22/0x50 [ 30.953649] kasan_set_track+0x25/0x30 [ 30.954189] __kasan_slab_alloc+0x59/0x70 [ 30.954718] kmem_cache_alloc+0x16b/0x370 [ 30.955253] vm_area_dup+0x20/0x160 [ 30.955744] __split_vma+0x170/0x950 [ 30.956270] split_vma+0xc6/0x110 [ 30.956724] mprotect_fixup+0x8d2/0xb30 [ 30.957247] do_mprotect_pkey+0x87e/0xd40 [ 30.957807] __x64_sys_mprotect+0x78/0xc0 [ 30.958371] do_syscall_64+0x3f/0x90 [ 30.958853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.959515] [ 30.959761] Freed by task 213: [ 30.960192] kasan_save_stack+0x22/0x50 [ 30.960731] kasan_set_track+0x25/0x30 [ 30.961257] kasan_save_free_info+0x2b/0x50 [ 30.961824] __kasan_slab_free+0x10a/0x190 [ 30.962403] kmem_cache_free+0x10d/0x4d0 [ 30.962919] rcu_core+0x8c8/0x2860 [ 30.963389] __do_softirq+0x1b7/0x7d4 [ 30.963907] [ 30.964155] Last potentially related work creation: [ 30.964772] kasan_save_stack+0x22/0x50 [ 30.965297] __kasan_record_aux_stack+0x8e/0xa0 [ 30.965910] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.966617] remove_vma+0x139/0x170 [ 30.967083] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.967694] do_vmi_munmap+0x1f1/0x2b0 [ 30.968221] __vm_munmap+0x138/0x3a0 [ 30.968731] __x64_sys_munmap+0x59/0x80 [ 30.969263] do_syscall_64+0x3f/0x90 [ 30.969809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.970521] [ 30.970737] The buggy address belongs to the object at ffff88800fd35000 [ 30.970737] which belongs to the cache vm_area_struct of size 168 [ 30.972324] The buggy address is located 88 bytes inside of [ 30.972324] freed 168-byte region [ffff88800fd35000, ffff88800fd350a8) [ 30.973801] [ 30.974017] The buggy address belongs to the physical page: [ 30.974720] page:000000004b1aef02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd35 [ 30.975857] memcg:ffff88800e217201 [ 30.976335] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.977011] page_type: 0xffffffff() [ 30.977520] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.978513] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e217201 [ 30.979438] page dumped because: kasan: bad access detected [ 30.980174] [ 30.980396] Memory state around the buggy address: [ 30.981007] ffff88800fd34f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.981953] ffff88800fd34f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.982851] >ffff88800fd35000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.983743] ^ [ 30.984503] ffff88800fd35080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.985408] ffff88800fd35100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.986350] ================================================================== [ 30.987564] Disabling lock debugging due to kernel taint [ 33.262916] BUG: Bad rss-counter state mm:0000000095fd0d1a type:MM_FILEPAGES val:33 [ 33.263627] BUG: Bad rss-counter state mm:0000000095fd0d1a type:MM_ANONPAGES val:22 [ 33.671936] BUG: Bad rss-counter state mm:000000004b84a0dd type:MM_FILEPAGES val:33 [ 33.672722] BUG: Bad rss-counter state mm:000000004b84a0dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58712' (ECDSA) to the list of known hosts. 2023/06/21 10:05:55 fuzzer started 2023/06/21 10:05:56 dialing manager at localhost:36067 2023/06/21 10:05:56 checking machine... 2023/06/21 10:05:56 checking revisions... [ 34.349750] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:05:56 testing simple program... [ 34.396332] cgroup: Unknown subsys name 'net' [ 34.470523] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:05:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801457f770 RCX=ffff88801457f778 RDX=ffff888014580000 RSI=ffff88801457f6a8 RDI=ffff88801457f6d8 RBP=dffffc0000000000 RSP=ffff88801457f680 R8 =0000000000000001 R9 =ffff88801457f718 R10=0000000000038001 R11=0000000000006097 R12=ffffed10028afedd R13=ffffed10028afedc R14=ffff88801457f720 R15=ffff88801457f6d8 RIP=ffffffff811305de RFL=00000212 [----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 00007f0cf3dc1900 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=00007f0cf3d86008 CR3=000000000ec5a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1354 RSI=ffff888008e07db0 RDI=ffff88806cf09aa0 RBP=ffff888008e07db0 RSP=ffff88806cf099f0 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff888008e07db0 R15=ffff88806cf09a98 RIP=ffffffff81130445 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 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=00007f9200a27450 CR3=0000000019d04000 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=2035353a35303a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a35303a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000