syzkaller login: [ 38.803935] BUG: Bad rss-counter state mm:0000000065972986 type:MM_FILEPAGES val:33 [ 38.804959] BUG: Bad rss-counter state mm:0000000065972986 type:MM_ANONPAGES val:22 [ 38.913406] ================================================================== [ 38.914292] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.914933] Read of size 8 at addr ffff88800cba64e0 by task sshd/218 [ 38.915447] [ 38.915589] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.916145] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.916834] Call Trace: [ 38.917040] <TASK> [ 38.917225] dump_stack_lvl+0x91/0xf0 [ 38.917952] print_report+0xcc/0x620 [ 38.918310] ? __virt_addr_valid+0x102/0x340 [ 38.918683] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919080] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919480] kasan_report+0xbe/0xf0 [ 38.919790] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.920200] vma_interval_tree_remove+0xc75/0xec0 [ 38.920617] vma_prepare+0xc54/0x11a0 [ 38.920929] __split_vma+0x5af/0x950 [ 38.921233] ? __pfx___split_vma+0x10/0x10 [ 38.921598] ? find_held_lock+0x2c/0x110 [ 38.921939] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.922362] ? lock_is_held_type+0x9f/0x120 [ 38.922797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.923303] ? mtree_range_walk+0x632/0x900 [ 38.923761] ? mas_walk+0x5c7/0x7c0 [ 38.924085] do_vmi_munmap+0x1f1/0x2b0 [ 38.924427] mmap_region+0x1f9/0x2660 [ 38.924771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.925115] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.925739] ? __pfx_lock_acquire+0x10/0x10 [ 38.926131] ? __pfx_mmap_region+0x10/0x10 [ 38.926471] ? security_mmap_addr+0x7d/0xa0 [ 38.926819] ? get_unmapped_area+0x1f5/0x3f0 [ 38.927183] do_mmap+0x854/0xf00 [ 38.927499] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.927848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.928236] ksys_mmap_pgoff+0x3af/0x500 [ 38.928575] do_syscall_64+0x3f/0x90 [ 38.928870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929304] RIP: 0033:0x7f3b7fde6d82 [ 38.929735] 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 [ 38.931220] RSP: 002b:00007ffda84bbb98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.931805] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b7fde6d82 [ 38.932386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b7f220000 [ 38.932967] RBP: 00007f3b7f220000 R08: 0000000000000009 R09: 0000000000001000 [ 38.933605] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b04a65ec0 [ 38.934137] R13: 00007ffda84bbbb0 R14: 00007ffda84bbbe0 R15: 00007ffda84bbf40 [ 38.934717] </TASK> [ 38.934924] [ 38.935071] Allocated by task 211: [ 38.935380] kasan_save_stack+0x22/0x50 [ 38.935732] kasan_set_track+0x25/0x30 [ 38.936043] __kasan_slab_alloc+0x59/0x70 [ 38.936368] kmem_cache_alloc+0x16b/0x370 [ 38.936729] vm_area_dup+0x20/0x160 [ 38.937052] __split_vma+0x170/0x950 [ 38.937375] split_vma+0xc6/0x110 [ 38.937718] mprotect_fixup+0x8d2/0xb30 [ 38.938068] do_mprotect_pkey+0x87e/0xd40 [ 38.938424] __x64_sys_mprotect+0x78/0xc0 [ 38.938830] do_syscall_64+0x3f/0x90 [ 38.939151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939576] [ 38.939723] Freed by task 13: [ 38.939985] kasan_save_stack+0x22/0x50 [ 38.940346] kasan_set_track+0x25/0x30 [ 38.940690] kasan_save_free_info+0x2b/0x50 [ 38.941038] __kasan_slab_free+0x10a/0x190 [ 38.941386] kmem_cache_free+0x10d/0x4d0 [ 38.941819] rcu_core+0x8c8/0x2860 [ 38.942146] __do_softirq+0x1b7/0x7d4 [ 38.942488] [ 38.942645] Last potentially related work creation: [ 38.943063] kasan_save_stack+0x22/0x50 [ 38.943423] __kasan_record_aux_stack+0x8e/0xa0 [ 38.943792] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.944208] remove_vma+0x139/0x170 [ 38.944510] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.944868] do_vmi_munmap+0x1f1/0x2b0 [ 38.945196] __vm_munmap+0x138/0x3a0 [ 38.945484] __x64_sys_munmap+0x59/0x80 [ 38.945854] do_syscall_64+0x3f/0x90 [ 38.946181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.946677] [ 38.946809] Second to last potentially related work creation: [ 38.947242] kasan_save_stack+0x22/0x50 [ 38.947560] __kasan_record_aux_stack+0x8e/0xa0 [ 38.947957] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.948379] remove_vma+0x139/0x170 [ 38.948675] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.949045] do_vmi_munmap+0x1f1/0x2b0 [ 38.949349] __vm_munmap+0x138/0x3a0 [ 38.949679] __x64_sys_munmap+0x59/0x80 [ 38.950010] do_syscall_64+0x3f/0x90 [ 38.950333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.950766] [ 38.950912] The buggy address belongs to the object at ffff88800cba6488 [ 38.950912] which belongs to the cache vm_area_struct of size 168 [ 38.951912] The buggy address is located 88 bytes inside of [ 38.951912] freed 168-byte region [ffff88800cba6488, ffff88800cba6530) [ 38.952875] [ 38.953016] The buggy address belongs to the physical page: [ 38.953447] page:0000000060718c48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcba6 [ 38.954271] memcg:ffff88800e146001 [ 38.954602] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.955055] page_type: 0xffffffff() [ 38.955352] raw: 0100000000000200 ffff8880087a0c80 ffffea0000663100 dead000000000008 [ 38.955968] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e146001 [ 38.956559] page dumped because: kasan: bad access detected [ 38.956991] [ 38.957140] Memory state around the buggy address: [ 38.957528] ffff88800cba6380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.958120] ffff88800cba6400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.958730] >ffff88800cba6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.959298] ^ [ 38.959794] ffff88800cba6500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.960370] ffff88800cba6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.960959] ================================================================== [ 38.961727] Disabling lock debugging due to kernel taint [ 40.926567] BUG: Bad rss-counter state mm:00000000e0ba6a26 type:MM_FILEPAGES val:33 [ 40.927241] BUG: Bad rss-counter state mm:00000000e0ba6a26 type:MM_ANONPAGES val:22 [ 41.316984] BUG: Bad rss-counter state mm:00000000461fe1e6 type:MM_FILEPAGES val:33 [ 41.317663] BUG: Bad rss-counter state mm:00000000461fe1e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46061' (ECDSA) to the list of known hosts. 2023/06/21 09:45:39 fuzzer started 2023/06/21 09:45:39 dialing manager at localhost:36067 2023/06/21 09:45:39 checking machine... 2023/06/21 09:45:39 checking revisions... [ 41.891194] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:45:39 testing simple program... [ 41.925986] cgroup: Unknown subsys name 'net' [ 41.980688] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:45:39 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=0000000000000001 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=00007fffc33b1a28 CR3=0000000005482000 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=00007f4405a3d5100000555cb46e8790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801994fdf0 RCX=0000000000000000 RDX=ffff8880169c0000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88801994fd80 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000008000 R13=ffff88801994fea8 R14=0000000000000004 R15=0000000000000000 RIP=ffffffff814c0434 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 00007fef1aeab900 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=00007ffc13fe6000 CR3=000000001cacc000 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