syzkaller login: [ 30.198813] BUG: Bad rss-counter state mm:00000000166f2079 type:MM_FILEPAGES val:33 [ 30.200035] BUG: Bad rss-counter state mm:00000000166f2079 type:MM_ANONPAGES val:22 [ 30.235231] ================================================================== [ 30.236327] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.237408] Read of size 8 at addr ffff888015950df0 by task sshd/219 [ 30.238321] [ 30.238601] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.239573] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.240736] Call Trace: [ 30.241076] [ 30.241443] dump_stack_lvl+0x91/0xf0 [ 30.241947] print_report+0xcc/0x620 [ 30.242524] ? __virt_addr_valid+0x102/0x340 [ 30.243153] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.243768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.244394] kasan_report+0xbe/0xf0 [ 30.244869] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.245502] vma_interval_tree_remove+0xc75/0xec0 [ 30.246104] vma_prepare+0xc54/0x11a0 [ 30.246586] __split_vma+0x5af/0x950 [ 30.247060] ? __pfx___split_vma+0x10/0x10 [ 30.247602] ? find_held_lock+0x2c/0x110 [ 30.248130] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.248703] ? lock_is_held_type+0x9f/0x120 [ 30.249258] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.249866] ? mtree_range_walk+0x632/0x900 [ 30.250437] ? mas_walk+0x5c7/0x7c0 [ 30.250918] do_vmi_munmap+0x1f1/0x2b0 [ 30.251415] mmap_region+0x1f9/0x2660 [ 30.251899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.252415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.253144] ? __pfx_lock_acquire+0x10/0x10 [ 30.253672] ? __pfx_mmap_region+0x10/0x10 [ 30.254200] ? security_mmap_addr+0x7d/0xa0 [ 30.254729] ? get_unmapped_area+0x1f5/0x3f0 [ 30.255271] do_mmap+0x854/0xf00 [ 30.255708] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.256197] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.256754] ksys_mmap_pgoff+0x3af/0x500 [ 30.257270] do_syscall_64+0x3f/0x90 [ 30.257743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.258389] RIP: 0033:0x7f6e99e04d82 [ 30.258845] 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 [ 30.260944] RSP: 002b:00007ffd1913a958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.261847] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e99e04d82 [ 30.262679] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e9923e000 [ 30.263755] RBP: 00007f6e9923e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.264598] R10: 0000000000000812 R11: 0000000000000206 R12: 000055669c66fec0 [ 30.265457] R13: 00007ffd1913a970 R14: 00007ffd1913a9a0 R15: 00007ffd1913ad00 [ 30.266306] [ 30.266602] [ 30.266819] Allocated by task 212: [ 30.267247] kasan_save_stack+0x22/0x50 [ 30.267747] kasan_set_track+0x25/0x30 [ 30.268239] __kasan_slab_alloc+0x59/0x70 [ 30.268765] kmem_cache_alloc+0x16b/0x370 [ 30.269304] vm_area_dup+0x20/0x160 [ 30.269761] __split_vma+0x170/0x950 [ 30.270235] split_vma+0xc6/0x110 [ 30.270673] mprotect_fixup+0x8d2/0xb30 [ 30.271166] do_mprotect_pkey+0x87e/0xd40 [ 30.271681] __x64_sys_mprotect+0x78/0xc0 [ 30.272199] do_syscall_64+0x3f/0x90 [ 30.272674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.273350] [ 30.273570] Freed by task 212: [ 30.273960] kasan_save_stack+0x22/0x50 [ 30.274464] kasan_set_track+0x25/0x30 [ 30.274956] kasan_save_free_info+0x2b/0x50 [ 30.275487] __kasan_slab_free+0x10a/0x190 [ 30.276023] kmem_cache_free+0x10d/0x4d0 [ 30.276526] rcu_core+0x8c8/0x2860 [ 30.276969] __do_softirq+0x1b7/0x7d4 [ 30.277449] [ 30.277666] Last potentially related work creation: [ 30.278248] kasan_save_stack+0x22/0x50 [ 30.278748] __kasan_record_aux_stack+0x8e/0xa0 [ 30.279318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.279958] remove_vma+0x139/0x170 [ 30.280405] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.280959] do_vmi_munmap+0x1f1/0x2b0 [ 30.281451] __vm_munmap+0x138/0x3a0 [ 30.281919] __x64_sys_munmap+0x59/0x80 [ 30.282417] do_syscall_64+0x3f/0x90 [ 30.282892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.283535] [ 30.283747] The buggy address belongs to the object at ffff888015950d98 [ 30.283747] which belongs to the cache vm_area_struct of size 168 [ 30.285221] The buggy address is located 88 bytes inside of [ 30.285221] freed 168-byte region [ffff888015950d98, ffff888015950e40) [ 30.286629] [ 30.286843] The buggy address belongs to the physical page: [ 30.287501] page:000000000f2c4747 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15950 [ 30.288588] memcg:ffff88800dd68e01 [ 30.289006] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.289651] page_type: 0xffffffff() [ 30.290102] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.291004] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd68e01 [ 30.291906] page dumped because: kasan: bad access detected [ 30.292570] [ 30.292789] Memory state around the buggy address: [ 30.293387] ffff888015950c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.294237] ffff888015950d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.295087] >ffff888015950d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.295937] ^ [ 30.296745] ffff888015950e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.297608] ffff888015950e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.298458] ================================================================== [ 30.299587] Disabling lock debugging due to kernel taint [ 32.256922] BUG: Bad rss-counter state mm:000000008facac22 type:MM_FILEPAGES val:33 [ 32.257956] BUG: Bad rss-counter state mm:000000008facac22 type:MM_ANONPAGES val:22 [ 32.836383] BUG: Bad rss-counter state mm:00000000c8bf8fcf type:MM_FILEPAGES val:31 [ 32.837444] BUG: Bad rss-counter state mm:00000000c8bf8fcf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30283' (ECDSA) to the list of known hosts. 2023/06/21 05:25:47 fuzzer started 2023/06/21 05:25:47 dialing manager at localhost:36067 2023/06/21 05:25:47 checking machine... 2023/06/21 05:25:47 checking revisions... [ 33.513206] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:25:47 testing simple program... [ 33.560626] cgroup: Unknown subsys name 'net' [ 33.599466] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:25:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016722e80 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=000055f8162c9654 RSP=ffff888019d8fde0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000007 R13=000055f8162c9654 R14=0000000000000040 R15=ffff888016722e40 RIP=ffffffff817168f8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fedd5224900 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=000055f8162c9654 CR3=000000000e6fc000 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=0000000000000000000055f814b42060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffd5fcc2ab8 CR3=0000000005482000 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=00007f5f97630510000055e20d884790 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