syzkaller login: [ 31.060156] BUG: Bad rss-counter state mm:00000000feda6383 type:MM_FILEPAGES val:33 [ 31.061634] BUG: Bad rss-counter state mm:00000000feda6383 type:MM_ANONPAGES val:22 [ 31.227458] ================================================================== [ 31.228544] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.229784] Read of size 8 at addr ffff88801660ed08 by task sshd/220 [ 31.230644] [ 31.230862] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.231760] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.232733] Call Trace: [ 31.233067] [ 31.233354] dump_stack_lvl+0x91/0xf0 [ 31.233849] print_report+0xcc/0x620 [ 31.234337] ? __virt_addr_valid+0x102/0x340 [ 31.234884] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235526] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.236142] kasan_report+0xbe/0xf0 [ 31.236614] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.237235] vma_interval_tree_remove+0xc75/0xec0 [ 31.237836] vma_prepare+0xc54/0x11a0 [ 31.238323] __split_vma+0x5af/0x950 [ 31.238798] ? __pfx___split_vma+0x10/0x10 [ 31.239343] ? find_held_lock+0x2c/0x110 [ 31.239888] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.240526] ? lock_is_held_type+0x9f/0x120 [ 31.241098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.241713] ? mtree_range_walk+0x632/0x900 [ 31.242266] ? mas_walk+0x5c7/0x7c0 [ 31.242740] do_vmi_munmap+0x1f1/0x2b0 [ 31.243234] mmap_region+0x1f9/0x2660 [ 31.243727] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.244241] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.244954] ? __pfx_lock_acquire+0x10/0x10 [ 31.245484] ? __pfx_mmap_region+0x10/0x10 [ 31.246010] ? security_mmap_addr+0x7d/0xa0 [ 31.246540] ? get_unmapped_area+0x1f5/0x3f0 [ 31.247087] do_mmap+0x854/0xf00 [ 31.247548] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.248049] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.248609] ksys_mmap_pgoff+0x3af/0x500 [ 31.249116] do_syscall_64+0x3f/0x90 [ 31.249598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250255] RIP: 0033:0x7f0b94ed6d82 [ 31.250717] 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 [ 31.252852] RSP: 002b:00007fff9f011788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.253759] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b94ed6d82 [ 31.254610] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b94310000 [ 31.255464] RBP: 00007f0b94310000 R08: 0000000000000009 R09: 0000000000001000 [ 31.256317] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4c261af70 [ 31.257167] R13: 00007fff9f0117a0 R14: 00007fff9f0117d0 R15: 00007fff9f011b30 [ 31.258020] [ 31.258312] [ 31.258526] Allocated by task 213: [ 31.258960] kasan_save_stack+0x22/0x50 [ 31.259477] kasan_set_track+0x25/0x30 [ 31.259974] __kasan_slab_alloc+0x59/0x70 [ 31.260510] kmem_cache_alloc+0x16b/0x370 [ 31.261024] vm_area_dup+0x20/0x160 [ 31.261479] __split_vma+0x170/0x950 [ 31.261947] split_vma+0xc6/0x110 [ 31.262385] mprotect_fixup+0x8d2/0xb30 [ 31.262894] do_mprotect_pkey+0x87e/0xd40 [ 31.263421] __x64_sys_mprotect+0x78/0xc0 [ 31.263958] do_syscall_64+0x3f/0x90 [ 31.264438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265088] [ 31.265304] Freed by task 213: [ 31.265700] kasan_save_stack+0x22/0x50 [ 31.266204] kasan_set_track+0x25/0x30 [ 31.266698] kasan_save_free_info+0x2b/0x50 [ 31.267231] __kasan_slab_free+0x10a/0x190 [ 31.267790] kmem_cache_free+0x10d/0x4d0 [ 31.268299] rcu_core+0x8c8/0x2860 [ 31.268747] __do_softirq+0x1b7/0x7d4 [ 31.269220] [ 31.269435] Last potentially related work creation: [ 31.270013] kasan_save_stack+0x22/0x50 [ 31.270515] __kasan_record_aux_stack+0x8e/0xa0 [ 31.271091] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.271749] remove_vma+0x139/0x170 [ 31.272201] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.272752] do_vmi_munmap+0x1f1/0x2b0 [ 31.273235] __vm_munmap+0x138/0x3a0 [ 31.273699] __x64_sys_munmap+0x59/0x80 [ 31.274194] do_syscall_64+0x3f/0x90 [ 31.274677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275316] [ 31.275535] The buggy address belongs to the object at ffff88801660ecb0 [ 31.275535] which belongs to the cache vm_area_struct of size 168 [ 31.277012] The buggy address is located 88 bytes inside of [ 31.277012] freed 168-byte region [ffff88801660ecb0, ffff88801660ed58) [ 31.278440] [ 31.278661] The buggy address belongs to the physical page: [ 31.279333] page:000000003db7b894 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1660e [ 31.280452] memcg:ffff8880094c0301 [ 31.280883] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.281549] page_type: 0xffffffff() [ 31.282015] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.282948] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094c0301 [ 31.283884] page dumped because: kasan: bad access detected [ 31.284560] [ 31.284776] Memory state around the buggy address: [ 31.285369] ffff88801660ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.286224] ffff88801660ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.287086] >ffff88801660ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.287951] ^ [ 31.288390] ffff88801660ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.289255] ffff88801660ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.290102] ================================================================== [ 31.291132] Disabling lock debugging due to kernel taint [ 33.303672] BUG: Bad rss-counter state mm:00000000b63b8abb type:MM_FILEPAGES val:33 [ 33.305051] BUG: Bad rss-counter state mm:00000000b63b8abb type:MM_ANONPAGES val:22 [ 33.682022] BUG: Bad rss-counter state mm:0000000024334144 type:MM_FILEPAGES val:33 [ 33.684038] BUG: Bad rss-counter state mm:0000000024334144 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54672' (ECDSA) to the list of known hosts. 2023/06/21 07:31:15 fuzzer started 2023/06/21 07:31:15 dialing manager at localhost:36067 2023/06/21 07:31:15 checking machine... 2023/06/21 07:31:15 checking revisions... [ 34.439621] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:31:15 testing simple program... [ 34.497432] cgroup: Unknown subsys name 'net' [ 34.551378] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:31:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016787e18 RCX=0000000000000000 RDX=0000000000800000 RSI=ffffffff81879c56 RDI=ffff888016787e40 RBP=1ffff11002cf0f96 RSP=ffff888016787cb0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=00007ffc71eb7960 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81879ca1 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 00007fdf2755f900 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=00007fdf27b170b0 CR3=0000000016f4a000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=0000563786737000 CR3=0000000019e4a000 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=2034313a31333a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a31333a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000