syzkaller login: [ 68.753181] BUG: Bad rss-counter state mm:0000000090a511e6 type:MM_FILEPAGES val:33 [ 68.754871] BUG: Bad rss-counter state mm:0000000090a511e6 type:MM_ANONPAGES val:22 [ 68.913440] ================================================================== [ 68.914352] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.915338] Read of size 8 at addr ffff888017dc3c20 by task sshd/227 [ 68.916094] [ 68.916442] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.917314] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.918303] Call Trace: [ 68.918633] [ 68.918916] dump_stack_lvl+0x91/0xf0 [ 68.919403] print_report+0xcc/0x620 [ 68.919877] ? __virt_addr_valid+0x102/0x340 [ 68.920423] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.921037] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.921653] kasan_report+0xbe/0xf0 [ 68.922126] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.922740] vma_interval_tree_remove+0xc75/0xec0 [ 68.923350] vma_prepare+0xc54/0x11a0 [ 68.923826] __split_vma+0x5af/0x950 [ 68.924291] ? __pfx___split_vma+0x10/0x10 [ 68.924817] ? find_held_lock+0x2c/0x110 [ 68.925336] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.925903] ? lock_is_held_type+0x9f/0x120 [ 68.926435] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.927039] ? mtree_range_walk+0x632/0x900 [ 68.927591] ? mas_walk+0x5c7/0x7c0 [ 68.928065] do_vmi_munmap+0x1f1/0x2b0 [ 68.928554] mmap_region+0x1f9/0x2660 [ 68.929030] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.929555] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.930260] ? __pfx_lock_acquire+0x10/0x10 [ 68.930787] ? __pfx_mmap_region+0x10/0x10 [ 68.931313] ? security_mmap_addr+0x7d/0xa0 [ 68.931837] ? get_unmapped_area+0x1f5/0x3f0 [ 68.932380] do_mmap+0x854/0xf00 [ 68.932817] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.933308] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.933874] ksys_mmap_pgoff+0x3af/0x500 [ 68.934378] do_syscall_64+0x3f/0x90 [ 68.934853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.935496] RIP: 0033:0x7f5d9edecd82 [ 68.935951] 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 [ 68.938052] RSP: 002b:00007ffc21df7c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.938941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d9edecd82 [ 68.939788] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d9e226000 [ 68.940616] RBP: 00007f5d9e226000 R08: 0000000000000009 R09: 0000000000001000 [ 68.941454] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583a495cec0 [ 68.942285] R13: 00007ffc21df7cb0 R14: 00007ffc21df7ce0 R15: 00007ffc21df8040 [ 68.943135] [ 68.943426] [ 68.943642] Allocated by task 220: [ 68.944066] kasan_save_stack+0x22/0x50 [ 68.944564] kasan_set_track+0x25/0x30 [ 68.945053] __kasan_slab_alloc+0x59/0x70 [ 68.945578] kmem_cache_alloc+0x16b/0x370 [ 68.946095] vm_area_dup+0x20/0x160 [ 68.946547] __split_vma+0x170/0x950 [ 68.947013] split_vma+0xc6/0x110 [ 68.947446] mprotect_fixup+0x8d2/0xb30 [ 68.947949] do_mprotect_pkey+0x87e/0xd40 [ 68.948470] __x64_sys_mprotect+0x78/0xc0 [ 68.948983] do_syscall_64+0x3f/0x90 [ 68.949475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.950122] [ 68.950337] Freed by task 220: [ 68.950729] kasan_save_stack+0x22/0x50 [ 68.951229] kasan_set_track+0x25/0x30 [ 68.951717] kasan_save_free_info+0x2b/0x50 [ 68.952250] __kasan_slab_free+0x10a/0x190 [ 68.952778] kmem_cache_free+0x10d/0x4d0 [ 68.953297] rcu_core+0x8c8/0x2860 [ 68.953744] __do_softirq+0x1b7/0x7d4 [ 68.954228] [ 68.954439] Last potentially related work creation: [ 68.955013] kasan_save_stack+0x22/0x50 [ 68.955516] __kasan_record_aux_stack+0x8e/0xa0 [ 68.956086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.956723] remove_vma+0x139/0x170 [ 68.957288] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.957866] do_vmi_munmap+0x1f1/0x2b0 [ 68.958360] __vm_munmap+0x138/0x3a0 [ 68.958818] __x64_sys_munmap+0x59/0x80 [ 68.959309] do_syscall_64+0x3f/0x90 [ 68.959785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.960431] [ 68.960644] The buggy address belongs to the object at ffff888017dc3bc8 [ 68.960644] which belongs to the cache vm_area_struct of size 168 [ 68.962097] The buggy address is located 88 bytes inside of [ 68.962097] freed 168-byte region [ffff888017dc3bc8, ffff888017dc3c70) [ 68.963486] [ 68.963699] The buggy address belongs to the physical page: [ 68.964352] page:00000000d6199815 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17dc3 [ 68.965449] memcg:ffff88801655dd01 [ 68.965874] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.966528] page_type: 0xffffffff() [ 68.966977] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.967894] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801655dd01 [ 68.968796] page dumped because: kasan: bad access detected [ 68.969473] [ 68.969685] Memory state around the buggy address: [ 68.970262] ffff888017dc3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.971118] ffff888017dc3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 68.971973] >ffff888017dc3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 68.972828] ^ [ 68.973370] ffff888017dc3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 68.974267] ffff888017dc3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 68.975137] ================================================================== [ 68.976091] Disabling lock debugging due to kernel taint [ 71.743645] BUG: Bad rss-counter state mm:0000000019333cde type:MM_FILEPAGES val:33 [ 71.744970] BUG: Bad rss-counter state mm:0000000019333cde type:MM_ANONPAGES val:22 [ 72.191631] BUG: Bad rss-counter state mm:0000000079e58bfa type:MM_FILEPAGES val:33 [ 72.192892] BUG: Bad rss-counter state mm:0000000079e58bfa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62575' (ECDSA) to the list of known hosts. 2023/06/20 16:35:20 fuzzer started 2023/06/20 16:35:20 dialing manager at localhost:36067 2023/06/20 16:35:20 checking machine... 2023/06/20 16:35:20 checking revisions... [ 72.792345] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:35:20 testing simple program... [ 72.839735] cgroup: Unknown subsys name 'net' [ 72.877834] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:35:20 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=00007ffc5e407aa8 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=00007fc7957be5100000555ce6bb2790 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=0000000000000001 RBX=0000000000000001 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84512060 RSP=ffff888019e47f18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888019e47f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff815343fe RFL=00000047 [---Z-PC] 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 00007f33f3d53900 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=00007f33f4308650 CR3=00000000094d2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000