syzkaller login: [ 68.760132] BUG: Bad rss-counter state mm:000000001223d1fd type:MM_FILEPAGES val:33 [ 68.761599] BUG: Bad rss-counter state mm:000000001223d1fd type:MM_ANONPAGES val:22 [ 68.922054] ================================================================== [ 68.922949] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.923889] Read of size 8 at addr ffff888016ab85c8 by task sshd/226 [ 68.924680] [ 68.924904] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.925931] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.926922] Call Trace: [ 68.927241] [ 68.927526] dump_stack_lvl+0x91/0xf0 [ 68.928030] print_report+0xcc/0x620 [ 68.928542] ? __virt_addr_valid+0x102/0x340 [ 68.929094] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.929716] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.930344] kasan_report+0xbe/0xf0 [ 68.930825] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.931447] vma_interval_tree_remove+0xc75/0xec0 [ 68.932061] vma_prepare+0xc54/0x11a0 [ 68.932560] __split_vma+0x5af/0x950 [ 68.933046] ? __pfx___split_vma+0x10/0x10 [ 68.933580] ? find_held_lock+0x2c/0x110 [ 68.934103] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.934686] ? lock_is_held_type+0x9f/0x120 [ 68.935236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.935843] ? mtree_range_walk+0x632/0x900 [ 68.936408] ? mas_walk+0x5c7/0x7c0 [ 68.936893] do_vmi_munmap+0x1f1/0x2b0 [ 68.937388] mmap_region+0x1f9/0x2660 [ 68.937877] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.938392] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.939116] ? __pfx_lock_acquire+0x10/0x10 [ 68.939646] ? __pfx_mmap_region+0x10/0x10 [ 68.940175] ? security_mmap_addr+0x7d/0xa0 [ 68.940718] ? get_unmapped_area+0x1f5/0x3f0 [ 68.941273] do_mmap+0x854/0xf00 [ 68.941718] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.942219] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.942782] ksys_mmap_pgoff+0x3af/0x500 [ 68.943293] do_syscall_64+0x3f/0x90 [ 68.943773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.944433] RIP: 0033:0x7fa294cedd82 [ 68.944892] 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 [ 68.947006] RSP: 002b:00007ffdfc978108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.947915] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa294cedd82 [ 68.948773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa294127000 [ 68.949626] RBP: 00007fa294127000 R08: 0000000000000009 R09: 0000000000001000 [ 68.950470] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565011250ec0 [ 68.951318] R13: 00007ffdfc978120 R14: 00007ffdfc978150 R15: 00007ffdfc9784b0 [ 68.952179] [ 68.952481] [ 68.952698] Allocated by task 219: [ 68.953133] kasan_save_stack+0x22/0x50 [ 68.953636] kasan_set_track+0x25/0x30 [ 68.954132] __kasan_slab_alloc+0x59/0x70 [ 68.954661] kmem_cache_alloc+0x16b/0x370 [ 68.955182] vm_area_dup+0x20/0x160 [ 68.955649] __split_vma+0x170/0x950 [ 68.956120] split_vma+0xc6/0x110 [ 68.956585] mprotect_fixup+0x8d2/0xb30 [ 68.957092] do_mprotect_pkey+0x87e/0xd40 [ 68.957615] __x64_sys_mprotect+0x78/0xc0 [ 68.958139] do_syscall_64+0x3f/0x90 [ 68.958618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.959262] [ 68.959486] Freed by task 219: [ 68.959883] kasan_save_stack+0x22/0x50 [ 68.960406] kasan_set_track+0x25/0x30 [ 68.960910] kasan_save_free_info+0x2b/0x50 [ 68.961452] __kasan_slab_free+0x10a/0x190 [ 68.961991] kmem_cache_free+0x10d/0x4d0 [ 68.962511] rcu_core+0x8c8/0x2860 [ 68.962958] __do_softirq+0x1b7/0x7d4 [ 68.963444] [ 68.963662] Last potentially related work creation: [ 68.964241] kasan_save_stack+0x22/0x50 [ 68.964765] __kasan_record_aux_stack+0x8e/0xa0 [ 68.965340] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.965989] remove_vma+0x139/0x170 [ 68.966561] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.967137] do_vmi_munmap+0x1f1/0x2b0 [ 68.967736] __vm_munmap+0x138/0x3a0 [ 68.968294] __x64_sys_munmap+0x59/0x80 [ 68.968790] do_syscall_64+0x3f/0x90 [ 68.969273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.969925] [ 68.970145] The buggy address belongs to the object at ffff888016ab8570 [ 68.970145] which belongs to the cache vm_area_struct of size 168 [ 68.971638] The buggy address is located 88 bytes inside of [ 68.971638] freed 168-byte region [ffff888016ab8570, ffff888016ab8618) [ 68.973087] [ 68.973312] The buggy address belongs to the physical page: [ 68.973968] page:00000000a57630e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ab8 [ 68.975054] memcg:ffff88800f5d8c01 [ 68.975481] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.976124] page_type: 0xffffffff() [ 68.976602] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.977521] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5d8c01 [ 68.978426] page dumped because: kasan: bad access detected [ 68.979082] [ 68.979298] Memory state around the buggy address: [ 68.979874] ffff888016ab8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.980731] ffff888016ab8500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 68.981594] >ffff888016ab8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.982443] ^ [ 68.983110] ffff888016ab8600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 68.983972] ffff888016ab8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.984843] ================================================================== [ 68.985750] Disabling lock debugging due to kernel taint [ 70.744222] BUG: Bad rss-counter state mm:00000000f304cb92 type:MM_FILEPAGES val:33 [ 70.745450] BUG: Bad rss-counter state mm:00000000f304cb92 type:MM_ANONPAGES val:22 [ 71.085865] BUG: Bad rss-counter state mm:00000000078434e6 type:MM_FILEPAGES val:33 [ 71.086965] BUG: Bad rss-counter state mm:00000000078434e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32878' (ECDSA) to the list of known hosts. 2023/06/20 13:50:35 fuzzer started 2023/06/20 13:50:35 dialing manager at localhost:36067 2023/06/20 13:50:35 checking machine... 2023/06/20 13:50:35 checking revisions... [ 71.713446] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:50:35 testing simple program... [ 71.751543] cgroup: Unknown subsys name 'net' [ 71.802153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:50:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fe8d16fa1b0 CR3=00000000099b0000 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=2035333a30353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a30353a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000002 RCX=ffffffff81892f88 RDX=ffff888016efd1c0 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000001 RSP=ffff888019f07a60 R8 =0000000000000004 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000001 R12=0000000000000001 R13=ffff888019f07c50 R14=ffff888019f07c80 R15=ffff888019f07c48 RIP=ffffffff814c086b 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 00007f46ae8ad900 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=00007ffc3e6d8000 CR3=0000000016562000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000