syzkaller login: [ 30.983950] BUG: Bad rss-counter state mm:0000000018f1ebb3 type:MM_FILEPAGES val:33 [ 30.985292] BUG: Bad rss-counter state mm:0000000018f1ebb3 type:MM_ANONPAGES val:22 [ 31.021234] ================================================================== [ 31.022155] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.023110] Read of size 8 at addr ffff88800fe6fdf0 by task sshd/220 [ 31.023891] [ 31.024109] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.024995] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.026001] Call Trace: [ 31.026324] [ 31.026611] dump_stack_lvl+0x91/0xf0 [ 31.027113] print_report+0xcc/0x620 [ 31.027608] ? __virt_addr_valid+0x102/0x340 [ 31.028176] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.028809] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.029462] kasan_report+0xbe/0xf0 [ 31.029944] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.030575] vma_interval_tree_remove+0xc75/0xec0 [ 31.031187] vma_prepare+0xc54/0x11a0 [ 31.031673] __split_vma+0x5af/0x950 [ 31.032159] ? __pfx___split_vma+0x10/0x10 [ 31.032698] ? find_held_lock+0x2c/0x110 [ 31.033245] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.033824] ? lock_is_held_type+0x9f/0x120 [ 31.034374] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.034985] ? mtree_range_walk+0x632/0x900 [ 31.035550] ? mas_walk+0x5c7/0x7c0 [ 31.036031] do_vmi_munmap+0x1f1/0x2b0 [ 31.036533] mmap_region+0x1f9/0x2660 [ 31.037048] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.037569] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.038307] ? __pfx_lock_acquire+0x10/0x10 [ 31.038840] ? __pfx_mmap_region+0x10/0x10 [ 31.039374] ? security_mmap_addr+0x7d/0xa0 [ 31.039918] ? get_unmapped_area+0x1f5/0x3f0 [ 31.040465] do_mmap+0x854/0xf00 [ 31.040912] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.041419] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.041983] ksys_mmap_pgoff+0x3af/0x500 [ 31.042489] do_syscall_64+0x3f/0x90 [ 31.042973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.043632] RIP: 0033:0x7f2fca143d82 [ 31.044089] 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 [ 31.046249] RSP: 002b:00007ffdd981ead8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.047199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2fca143d82 [ 31.048067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2fc957d000 [ 31.048923] RBP: 00007f2fc957d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.049782] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d671200ec0 [ 31.050816] R13: 00007ffdd981eaf0 R14: 00007ffdd981eb20 R15: 00007ffdd981ee80 [ 31.051660] [ 31.051958] [ 31.052172] Allocated by task 213: [ 31.052612] kasan_save_stack+0x22/0x50 [ 31.053137] kasan_set_track+0x25/0x30 [ 31.053639] __kasan_slab_alloc+0x59/0x70 [ 31.054169] kmem_cache_alloc+0x16b/0x370 [ 31.054686] vm_area_dup+0x20/0x160 [ 31.055138] __split_vma+0x170/0x950 [ 31.055599] split_vma+0xc6/0x110 [ 31.056034] mprotect_fixup+0x8d2/0xb30 [ 31.056532] do_mprotect_pkey+0x87e/0xd40 [ 31.057059] __x64_sys_mprotect+0x78/0xc0 [ 31.057597] do_syscall_64+0x3f/0x90 [ 31.058087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058727] [ 31.058946] Freed by task 213: [ 31.059338] kasan_save_stack+0x22/0x50 [ 31.059839] kasan_set_track+0x25/0x30 [ 31.060325] kasan_save_free_info+0x2b/0x50 [ 31.060857] __kasan_slab_free+0x10a/0x190 [ 31.061402] kmem_cache_free+0x10d/0x4d0 [ 31.061912] rcu_core+0x8c8/0x2860 [ 31.062358] __do_softirq+0x1b7/0x7d4 [ 31.062831] [ 31.063043] Last potentially related work creation: [ 31.063617] kasan_save_stack+0x22/0x50 [ 31.064127] __kasan_record_aux_stack+0x8e/0xa0 [ 31.064690] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.065341] remove_vma+0x139/0x170 [ 31.065794] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.066351] do_vmi_munmap+0x1f1/0x2b0 [ 31.066828] __vm_munmap+0x138/0x3a0 [ 31.067289] __x64_sys_munmap+0x59/0x80 [ 31.067785] do_syscall_64+0x3f/0x90 [ 31.068255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.068894] [ 31.069112] The buggy address belongs to the object at ffff88800fe6fd98 [ 31.069112] which belongs to the cache vm_area_struct of size 168 [ 31.070567] The buggy address is located 88 bytes inside of [ 31.070567] freed 168-byte region [ffff88800fe6fd98, ffff88800fe6fe40) [ 31.071960] [ 31.072174] The buggy address belongs to the physical page: [ 31.072829] page:00000000582c89b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe6f [ 31.073935] memcg:ffff8880191f6001 [ 31.074361] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.074997] page_type: 0xffffffff() [ 31.075441] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.076352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880191f6001 [ 31.077294] page dumped because: kasan: bad access detected [ 31.077947] [ 31.078160] Memory state around the buggy address: [ 31.078729] ffff88800fe6fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.079575] ffff88800fe6fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.080428] >ffff88800fe6fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.081285] ^ [ 31.082082] ffff88800fe6fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.082948] ffff88800fe6fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.083792] ================================================================== [ 31.084803] Disabling lock debugging due to kernel taint [ 32.831505] BUG: Bad rss-counter state mm:00000000200334cc type:MM_FILEPAGES val:33 [ 32.832160] BUG: Bad rss-counter state mm:00000000200334cc type:MM_ANONPAGES val:22 [ 33.428086] BUG: Bad rss-counter state mm:00000000ddfeabda type:MM_FILEPAGES val:33 [ 33.429317] BUG: Bad rss-counter state mm:00000000ddfeabda type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8251' (ECDSA) to the list of known hosts. 2023/06/20 20:14:23 fuzzer started 2023/06/20 20:14:23 dialing manager at localhost:36067 2023/06/20 20:14:23 checking machine... 2023/06/20 20:14:23 checking revisions... [ 34.085926] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:14:23 testing simple program... [ 34.136195] cgroup: Unknown subsys name 'net' [ 34.174506] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:14:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800e75fe88 RCX=0000000000000001 RDX=1ffff11001cebeca RSI=ffff88800e75fe58 RDI=ffff88800e75f650 RBP=1ffff11001cebfd1 RSP=ffff88800e75f5d8 R8 =0000000000000001 R9 =ffff88800e75f688 R10=0000000000038001 R11=00000000000223eb R12=ffff88800e75f6a8 R13=ffff88800e75f690 R14=ffff88800e75fe58 R15=ffff88800e75f648 RIP=ffffffff81131c83 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 00007f6993496900 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=00007f6993a4b650 CR3=0000000015b36000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=0000000000000000 RBX=0000000000000002 RCX=ffffffff864b2f3e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b2f42 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130ad6 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 00007f39c6954900 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=00007f39c5d80250 CR3=00000000145f6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f20f24df92f3c56800000000000ae988 XMM05=e4f929fd8b9e19c50000000000132f68 XMM06=19e9129bd510f2350000000000131e00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000