syzkaller login: [ 32.628199] BUG: Bad rss-counter state mm:000000007a6b2958 type:MM_FILEPAGES val:33 [ 32.629374] BUG: Bad rss-counter state mm:000000007a6b2958 type:MM_ANONPAGES val:22 [ 32.723459] ================================================================== [ 32.724382] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.725327] Read of size 8 at addr ffff888016672310 by task sshd/219 [ 32.726100] [ 32.726382] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.727310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.728295] Call Trace: [ 32.728616] [ 32.728903] dump_stack_lvl+0x91/0xf0 [ 32.729402] print_report+0xcc/0x620 [ 32.729885] ? __virt_addr_valid+0x102/0x340 [ 32.730474] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.731102] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.731723] kasan_report+0xbe/0xf0 [ 32.732202] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.732833] vma_interval_tree_remove+0xc75/0xec0 [ 32.733440] vma_prepare+0xc54/0x11a0 [ 32.733923] __split_vma+0x5af/0x950 [ 32.734405] ? __pfx___split_vma+0x10/0x10 [ 32.734942] ? find_held_lock+0x2c/0x110 [ 32.735469] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.736041] ? lock_is_held_type+0x9f/0x120 [ 32.736580] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.737184] ? mtree_range_walk+0x632/0x900 [ 32.737733] ? mas_walk+0x5c7/0x7c0 [ 32.738213] do_vmi_munmap+0x1f1/0x2b0 [ 32.738710] mmap_region+0x1f9/0x2660 [ 32.739200] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.739710] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.740433] ? __pfx_lock_acquire+0x10/0x10 [ 32.740963] ? __pfx_mmap_region+0x10/0x10 [ 32.741494] ? security_mmap_addr+0x7d/0xa0 [ 32.742029] ? get_unmapped_area+0x1f5/0x3f0 [ 32.742596] do_mmap+0x854/0xf00 [ 32.743040] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.743534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.744102] ksys_mmap_pgoff+0x3af/0x500 [ 32.744611] do_syscall_64+0x3f/0x90 [ 32.745087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.745729] RIP: 0033:0x7ffb9cf2bd82 [ 32.746186] 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 [ 32.748300] RSP: 002b:00007ffda6839618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.749210] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb9cf2bd82 [ 32.750060] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb9c365000 [ 32.750928] RBP: 00007ffb9c365000 R08: 0000000000000009 R09: 0000000000001000 [ 32.751779] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8c38f4d90 [ 32.752624] R13: 00007ffda6839630 R14: 00007ffda6839660 R15: 00007ffda68399c0 [ 32.753480] [ 32.753773] [ 32.753990] Allocated by task 212: [ 32.754434] kasan_save_stack+0x22/0x50 [ 32.754945] kasan_set_track+0x25/0x30 [ 32.755437] __kasan_slab_alloc+0x59/0x70 [ 32.755967] kmem_cache_alloc+0x16b/0x370 [ 32.756481] vm_area_dup+0x20/0x160 [ 32.756939] __split_vma+0x170/0x950 [ 32.757404] split_vma+0xc6/0x110 [ 32.757845] mprotect_fixup+0x8d2/0xb30 [ 32.758359] do_mprotect_pkey+0x87e/0xd40 [ 32.758892] __x64_sys_mprotect+0x78/0xc0 [ 32.759420] do_syscall_64+0x3f/0x90 [ 32.759904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.760560] [ 32.760776] Freed by task 212: [ 32.761166] kasan_save_stack+0x22/0x50 [ 32.761683] kasan_set_track+0x25/0x30 [ 32.762206] kasan_save_free_info+0x2b/0x50 [ 32.762741] __kasan_slab_free+0x10a/0x190 [ 32.763285] kmem_cache_free+0x10d/0x4d0 [ 32.763798] rcu_core+0x8c8/0x2860 [ 32.764247] __do_softirq+0x1b7/0x7d4 [ 32.764736] [ 32.764951] Last potentially related work creation: [ 32.765534] kasan_save_stack+0x22/0x50 [ 32.766047] __kasan_record_aux_stack+0x8e/0xa0 [ 32.766629] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.767323] remove_vma+0x139/0x170 [ 32.767783] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.768342] do_vmi_munmap+0x1f1/0x2b0 [ 32.768824] __vm_munmap+0x138/0x3a0 [ 32.769295] __x64_sys_munmap+0x59/0x80 [ 32.769800] do_syscall_64+0x3f/0x90 [ 32.770299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.770940] [ 32.771156] The buggy address belongs to the object at ffff8880166722b8 [ 32.771156] which belongs to the cache vm_area_struct of size 168 [ 32.772631] The buggy address is located 88 bytes inside of [ 32.772631] freed 168-byte region [ffff8880166722b8, ffff888016672360) [ 32.774039] [ 32.774267] The buggy address belongs to the physical page: [ 32.774934] page:000000002aab7941 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16672 [ 32.776022] memcg:ffff88800ea27801 [ 32.776444] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.777097] page_type: 0xffffffff() [ 32.777549] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.778481] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea27801 [ 32.779382] page dumped because: kasan: bad access detected [ 32.780039] [ 32.780256] Memory state around the buggy address: [ 32.780843] ffff888016672200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.781698] ffff888016672280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.782566] >ffff888016672300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.783424] ^ [ 32.783896] ffff888016672380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.784748] ffff888016672400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.785604] ================================================================== [ 32.786573] Disabling lock debugging due to kernel taint [ 35.555033] BUG: Bad rss-counter state mm:000000008a69c3fd type:MM_FILEPAGES val:33 [ 35.556137] BUG: Bad rss-counter state mm:000000008a69c3fd type:MM_ANONPAGES val:22 [ 35.989271] BUG: Bad rss-counter state mm:00000000524ed372 type:MM_FILEPAGES val:33 [ 35.990356] BUG: Bad rss-counter state mm:00000000524ed372 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9276' (ECDSA) to the list of known hosts. 2023/06/19 13:14:33 fuzzer started 2023/06/19 13:14:33 dialing manager at localhost:44161 2023/06/19 13:14:33 checking machine... 2023/06/19 13:14:33 checking revisions... [ 36.664321] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:14:33 testing simple program... [ 36.723658] cgroup: Unknown subsys name 'net' [ 36.758210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:14:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000c RCX=ffffffff8184cd3c RDX=ffff888017cb3680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016437954 RSP=ffff888016437838 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000002 R11=322e322e302e3031 R12=ffff888016437948 R13=0000000000000001 R14=0000000000000002 R15=00007f635e607860 RIP=ffffffff8184cd3c 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 00007f635e60b700 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=00007fa3f2c29b60 CR3=0000000016956000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303933 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff84493a87 RDX=ffff888015d28000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffff84e39aa0 RSP=ffff888015c4f4b8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff888015c4fe70 R13=ffff888015c4fe70 R14=ffff888015c4fea9 R15=0000000000000002 RIP=ffffffff814c01fc 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 00007f6e4595a900 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=00007f6e45939020 CR3=000000001ce1a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000