syzkaller login: [ 132.474400] BUG: Bad rss-counter state mm:00000000fb239750 type:MM_FILEPAGES val:33 [ 132.476231] BUG: Bad rss-counter state mm:00000000fb239750 type:MM_ANONPAGES val:22 [ 132.632446] ================================================================== [ 132.633585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 132.634835] Read of size 8 at addr ffff8880096e3df0 by task sshd/219 [ 132.635921] [ 132.636197] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 132.637526] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 132.638509] Call Trace: [ 132.638798] [ 132.639058] dump_stack_lvl+0x91/0xf0 [ 132.639513] print_report+0xcc/0x620 [ 132.639955] ? __virt_addr_valid+0x102/0x340 [ 132.640452] ? vma_interval_tree_remove+0xc75/0xec0 [ 132.641005] ? vma_interval_tree_remove+0xc75/0xec0 [ 132.641567] kasan_report+0xbe/0xf0 [ 132.642000] ? vma_interval_tree_remove+0xc75/0xec0 [ 132.642561] vma_interval_tree_remove+0xc75/0xec0 [ 132.643104] vma_prepare+0xc54/0x11a0 [ 132.643562] __split_vma+0x5af/0x950 [ 132.643995] ? __pfx___split_vma+0x10/0x10 [ 132.644475] ? find_held_lock+0x2c/0x110 [ 132.644943] do_vmi_align_munmap+0x2ba/0x11f0 [ 132.645456] ? lock_is_held_type+0x9f/0x120 [ 132.645945] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 132.646498] ? mtree_range_walk+0x632/0x900 [ 132.646994] ? mas_walk+0x5c7/0x7c0 [ 132.647424] do_vmi_munmap+0x1f1/0x2b0 [ 132.647897] mmap_region+0x1f9/0x2660 [ 132.648332] ? vm_mmap_pgoff+0x15c/0x3a0 [ 132.648794] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 132.649444] ? __pfx_lock_acquire+0x10/0x10 [ 132.649927] ? __pfx_mmap_region+0x10/0x10 [ 132.650422] ? security_mmap_addr+0x7d/0xa0 [ 132.650915] ? get_unmapped_area+0x1f5/0x3f0 [ 132.651422] do_mmap+0x854/0xf00 [ 132.651859] vm_mmap_pgoff+0x1a6/0x3a0 [ 132.652314] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 132.652826] ksys_mmap_pgoff+0x3af/0x500 [ 132.653294] do_syscall_64+0x3f/0x90 [ 132.653727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 132.654316] RIP: 0033:0x7f149e7bed82 [ 132.654731] 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 [ 132.656698] RSP: 002b:00007ffc3d294698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 132.657517] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f149e7bed82 [ 132.658285] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f149dbf8000 [ 132.659046] RBP: 00007f149dbf8000 R08: 0000000000000009 R09: 0000000000001000 [ 132.659854] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eea2fc3d90 [ 132.660631] R13: 00007ffc3d2946b0 R14: 00007ffc3d2946e0 R15: 00007ffc3d294a40 [ 132.661421] [ 132.661687] [ 132.661884] Allocated by task 212: [ 132.662280] kasan_save_stack+0x22/0x50 [ 132.662738] kasan_set_track+0x25/0x30 [ 132.663182] __kasan_slab_alloc+0x59/0x70 [ 132.663687] kmem_cache_alloc+0x16b/0x370 [ 132.664158] vm_area_dup+0x20/0x160 [ 132.664575] __split_vma+0x170/0x950 [ 132.665002] split_vma+0xc6/0x110 [ 132.665403] mprotect_fixup+0x8d2/0xb30 [ 132.665860] do_mprotect_pkey+0x87e/0xd40 [ 132.666341] __x64_sys_mprotect+0x78/0xc0 [ 132.666811] do_syscall_64+0x3f/0x90 [ 132.667237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 132.667851] [ 132.668042] Freed by task 212: [ 132.668395] kasan_save_stack+0x22/0x50 [ 132.668854] kasan_set_track+0x25/0x30 [ 132.669303] kasan_save_free_info+0x2b/0x50 [ 132.669797] __kasan_slab_free+0x10a/0x190 [ 132.670278] kmem_cache_free+0x10d/0x4d0 [ 132.670737] rcu_core+0x8c8/0x2860 [ 132.671127] __do_softirq+0x1b7/0x7d4 [ 132.671587] [ 132.671781] Last potentially related work creation: [ 132.672302] kasan_save_stack+0x22/0x50 [ 132.672752] __kasan_record_aux_stack+0x8e/0xa0 [ 132.673269] __call_rcu_common.constprop.0+0x6a/0xb90 [ 132.673847] remove_vma+0x139/0x170 [ 132.674254] do_vmi_align_munmap+0xd4a/0x11f0 [ 132.674759] do_vmi_munmap+0x1f1/0x2b0 [ 132.675196] __vm_munmap+0x138/0x3a0 [ 132.675732] __x64_sys_munmap+0x59/0x80 [ 132.676186] do_syscall_64+0x3f/0x90 [ 132.676613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 132.677191] [ 132.677387] The buggy address belongs to the object at ffff8880096e3d98 [ 132.677387] which belongs to the cache vm_area_struct of size 168 [ 132.678704] The buggy address is located 88 bytes inside of [ 132.678704] freed 168-byte region [ffff8880096e3d98, ffff8880096e3e40) [ 132.680005] [ 132.680200] The buggy address belongs to the physical page: [ 132.680789] page:00000000471017c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96e3 [ 132.681763] memcg:ffff88800ea39f01 [ 132.682142] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 132.682765] page_type: 0xffffffff() [ 132.683167] raw: 0100000000000200 ffff88800879fc80 ffffea000036b900 dead000000000003 [ 132.684013] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea39f01 [ 132.684821] page dumped because: kasan: bad access detected [ 132.685404] [ 132.685594] Memory state around the buggy address: [ 132.686110] ffff8880096e3c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 132.686861] ffff8880096e3d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 132.687648] >ffff8880096e3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 132.688405] ^ [ 132.689126] ffff8880096e3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 132.689878] ffff8880096e3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 132.690627] ================================================================== [ 132.691587] Disabling lock debugging due to kernel taint [ 134.617388] BUG: Bad rss-counter state mm:00000000a90fda7e type:MM_FILEPAGES val:33 [ 134.618308] BUG: Bad rss-counter state mm:00000000a90fda7e type:MM_ANONPAGES val:22 [ 135.212960] BUG: Bad rss-counter state mm:0000000074665e85 type:MM_FILEPAGES val:33 [ 135.214361] BUG: Bad rss-counter state mm:0000000074665e85 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24756' (ECDSA) to the list of known hosts. 2023/06/20 06:32:56 fuzzer started 2023/06/20 06:32:56 dialing manager at localhost:44161 2023/06/20 06:32:56 checking machine... 2023/06/20 06:32:56 checking revisions... [ 135.930969] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:32:56 testing simple program... [ 135.978746] cgroup: Unknown subsys name 'net' [ 136.078620] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:31:22 Registers: info registers vcpu 0 RAX=ffffffff8199e0f8 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffffffff8199e0f8 RDI=ffff88806ce09b18 RBP=ffff88806ce09ae8 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000277d5 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff8880068851c0 R15=ffff88800da47d00 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 00007f6f7e9e8900 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=00007f6f7de24ff0 CR3=000000000d5fc000 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=d675bd36d83c4e869b4c677d9086701b XMM02=0000000000128cd0d59e07bde36eea69 XMM03=0000000000128df8ec2efd57dc4c00df XMM04=5c50e608139970a700000000000ae988 XMM05=e01ac6d1b2e6153f0000000000140730 XMM06=806171799158d967000000000013f1b0 XMM07=fb795ef6d6577056000000000012fb70 XMM08=2c67c8bc2e329bc30000000000128df8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007ffea529bd28 CR3=000000000dd98000 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=2035353a32333a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a32333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000