syzkaller login: [ 23.853053] BUG: Bad rss-counter state mm:0000000094073e86 type:MM_FILEPAGES val:33 [ 23.854269] BUG: Bad rss-counter state mm:0000000094073e86 type:MM_ANONPAGES val:22 [ 23.896364] ================================================================== [ 23.897437] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.898416] Read of size 8 at addr ffff88800ffdc6b0 by task sshd/221 [ 23.899223] [ 23.899446] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 23.900329] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.901321] Call Trace: [ 23.901661] [ 23.901980] dump_stack_lvl+0x91/0xf0 [ 23.902493] print_report+0xcc/0x620 [ 23.902999] ? __virt_addr_valid+0x102/0x340 [ 23.903555] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.904193] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.904846] kasan_report+0xbe/0xf0 [ 23.905331] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.906061] vma_interval_tree_remove+0xc75/0xec0 [ 23.906898] vma_prepare+0xc54/0x11a0 [ 23.907440] __split_vma+0x5af/0x950 [ 23.907934] ? __pfx___split_vma+0x10/0x10 [ 23.908649] ? find_held_lock+0x2c/0x110 [ 23.909356] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.910157] ? lock_is_held_type+0x9f/0x120 [ 23.910829] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.911438] ? mtree_range_walk+0x632/0x900 [ 23.912003] ? mas_walk+0x5c7/0x7c0 [ 23.912479] do_vmi_munmap+0x1f1/0x2b0 [ 23.913003] mmap_region+0x1f9/0x2660 [ 23.913508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.914043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.914806] ? __pfx_lock_acquire+0x10/0x10 [ 23.915347] ? __pfx_mmap_region+0x10/0x10 [ 23.915903] ? security_mmap_addr+0x7d/0xa0 [ 23.916454] ? get_unmapped_area+0x1f5/0x3f0 [ 23.917023] do_mmap+0x854/0xf00 [ 23.917485] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.918002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.918589] ksys_mmap_pgoff+0x3af/0x500 [ 23.919112] do_syscall_64+0x3f/0x90 [ 23.919599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.920257] RIP: 0033:0x7f3cd12e1d82 [ 23.920738] 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 [ 23.922937] RSP: 002b:00007ffca6738648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.923858] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cd12e1d82 [ 23.924728] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3cd071b000 [ 23.925586] RBP: 00007f3cd071b000 R08: 0000000000000009 R09: 0000000000001000 [ 23.926442] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601649b8ec0 [ 23.927316] R13: 00007ffca6738660 R14: 00007ffca6738690 R15: 00007ffca67389f0 [ 23.928199] [ 23.928492] [ 23.928730] Allocated by task 214: [ 23.929164] kasan_save_stack+0x22/0x50 [ 23.929697] kasan_set_track+0x25/0x30 [ 23.930191] __kasan_slab_alloc+0x59/0x70 [ 23.930729] kmem_cache_alloc+0x16b/0x370 [ 23.931265] vm_area_dup+0x20/0x160 [ 23.931740] __split_vma+0x170/0x950 [ 23.932220] split_vma+0xc6/0x110 [ 23.932675] mprotect_fixup+0x8d2/0xb30 [ 23.933197] do_mprotect_pkey+0x87e/0xd40 [ 23.933760] __x64_sys_mprotect+0x78/0xc0 [ 23.934278] do_syscall_64+0x3f/0x90 [ 23.934770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.935424] [ 23.935638] Freed by task 212: [ 23.936045] kasan_save_stack+0x22/0x50 [ 23.936551] kasan_set_track+0x25/0x30 [ 23.937071] kasan_save_free_info+0x2b/0x50 [ 23.937614] __kasan_slab_free+0x10a/0x190 [ 23.938166] kmem_cache_free+0x10d/0x4d0 [ 23.938683] rcu_core+0x8c8/0x2860 [ 23.939140] __do_softirq+0x1b7/0x7d4 [ 23.939630] [ 23.939855] Last potentially related work creation: [ 23.940441] kasan_save_stack+0x22/0x50 [ 23.941015] __kasan_record_aux_stack+0x8e/0xa0 [ 23.941617] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.942279] remove_vma+0x139/0x170 [ 23.942754] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.943312] do_vmi_munmap+0x1f1/0x2b0 [ 23.943813] __vm_munmap+0x138/0x3a0 [ 23.944288] __x64_sys_munmap+0x59/0x80 [ 23.944816] do_syscall_64+0x3f/0x90 [ 23.945299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.945976] [ 23.946195] The buggy address belongs to the object at ffff88800ffdc658 [ 23.946195] which belongs to the cache vm_area_struct of size 168 [ 23.947720] The buggy address is located 88 bytes inside of [ 23.947720] freed 168-byte region [ffff88800ffdc658, ffff88800ffdc700) [ 23.949174] [ 23.949399] The buggy address belongs to the physical page: [ 23.950082] page:000000001ef22f44 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ffdc570 pfn:0xffdc [ 23.951334] memcg:ffff88800df23701 [ 23.951774] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.952425] page_type: 0xffffffff() [ 23.952897] raw: 0100000000000200 ffff88800879fc80 ffffea0000355100 dead000000000004 [ 23.953856] raw: ffff88800ffdc570 000000008011000d 00000001ffffffff ffff88800df23701 [ 23.954788] page dumped because: kasan: bad access detected [ 23.955450] [ 23.955681] Memory state around the buggy address: [ 23.956283] ffff88800ffdc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.957201] ffff88800ffdc600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.958118] >ffff88800ffdc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.959001] ^ [ 23.959599] ffff88800ffdc700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 23.960470] ffff88800ffdc780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 23.961360] ================================================================== [ 23.962351] Disabling lock debugging due to kernel taint [ 26.494846] BUG: Bad rss-counter state mm:000000005e48f969 type:MM_FILEPAGES val:33 [ 26.496240] BUG: Bad rss-counter state mm:000000005e48f969 type:MM_ANONPAGES val:22 [ 26.977229] BUG: Bad rss-counter state mm:00000000156baf13 type:MM_FILEPAGES val:33 [ 26.978563] BUG: Bad rss-counter state mm:00000000156baf13 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4479' (ECDSA) to the list of known hosts. 2023/06/20 04:45:30 fuzzer started 2023/06/20 04:45:30 dialing manager at localhost:44161 2023/06/20 04:45:30 checking machine... 2023/06/20 04:45:30 checking revisions... [ 27.658299] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:45:30 testing simple program... [ 27.719808] cgroup: Unknown subsys name 'net' [ 27.774002] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:45:29 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09920 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff88800cad3180 RIP=ffffffff8180f009 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 00007f0c73c5a900 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=00007f0c7308bf30 CR3=000000000d754000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d951ba587474490600000000000ae988 XMM05=962e49ef60c0e4e50000000000135210 XMM06=c291bd5c70af25b90000000000133c90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000070 RBX=ffff888016bd03c0 RCX=00000000000995c1 RDX=0000000000099581 RSI=0000000000000cc0 RDI=0000000000099581 RBP=ffff88801cac75e0 RSP=ffff88801cac7590 R8 =0000000000042a50 R9 =fffffbfff0ba77da R10=0000000000000000 R11=ffff888016bd0280 R12=ffff888008fce000 R13=0000000000000000 R14=0000000000000cc0 R15=ffffffff8366cd3c RIP=ffffffff81808200 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 00007fda4609b900 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=00007ffe768f5000 CR3=000000000defa000 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