syzkaller login: [ 58.390072] BUG: Bad rss-counter state mm:00000000db8276b9 type:MM_FILEPAGES val:33 [ 58.391246] BUG: Bad rss-counter state mm:00000000db8276b9 type:MM_ANONPAGES val:22 [ 58.424730] ================================================================== [ 58.425765] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.426801] Read of size 8 at addr ffff8880169fc4e0 by task sshd/220 [ 58.427664] [ 58.427926] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 58.429027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.430130] Call Trace: [ 58.430460] [ 58.430743] dump_stack_lvl+0x91/0xf0 [ 58.431229] print_report+0xcc/0x620 [ 58.431714] ? __virt_addr_valid+0x102/0x340 [ 58.432401] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.433036] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.433898] kasan_report+0xbe/0xf0 [ 58.434445] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.435125] vma_interval_tree_remove+0xc75/0xec0 [ 58.435750] vma_prepare+0xc54/0x11a0 [ 58.436300] __split_vma+0x5af/0x950 [ 58.436862] ? __pfx___split_vma+0x10/0x10 [ 58.437486] ? find_held_lock+0x2c/0x110 [ 58.438003] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.438568] ? lock_is_held_type+0x9f/0x120 [ 58.439106] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.439710] ? mtree_range_walk+0x632/0x900 [ 58.440264] ? mas_walk+0x5c7/0x7c0 [ 58.440738] do_vmi_munmap+0x1f1/0x2b0 [ 58.441228] mmap_region+0x1f9/0x2660 [ 58.441719] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.442229] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.442946] ? __pfx_lock_acquire+0x10/0x10 [ 58.443471] ? __pfx_mmap_region+0x10/0x10 [ 58.443998] ? security_mmap_addr+0x7d/0xa0 [ 58.444555] ? get_unmapped_area+0x1f5/0x3f0 [ 58.445104] do_mmap+0x854/0xf00 [ 58.445539] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.446039] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.446601] ksys_mmap_pgoff+0x3af/0x500 [ 58.447113] do_syscall_64+0x3f/0x90 [ 58.447595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.448246] RIP: 0033:0x7fd95a15dd82 [ 58.448716] 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 [ 58.450841] RSP: 002b:00007ffd34ef0ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.451765] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd95a15dd82 [ 58.452624] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd959597000 [ 58.453652] RBP: 00007fd959597000 R08: 0000000000000009 R09: 0000000000001000 [ 58.454498] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556725fa6ec0 [ 58.455340] R13: 00007ffd34ef0cc0 R14: 00007ffd34ef0cf0 R15: 00007ffd34ef1050 [ 58.456212] [ 58.456504] [ 58.456718] Allocated by task 213: [ 58.457148] kasan_save_stack+0x22/0x50 [ 58.457653] kasan_set_track+0x25/0x30 [ 58.458142] __kasan_slab_alloc+0x59/0x70 [ 58.458664] kmem_cache_alloc+0x16b/0x370 [ 58.459176] vm_area_dup+0x20/0x160 [ 58.459630] __split_vma+0x170/0x950 [ 58.460107] split_vma+0xc6/0x110 [ 58.460548] mprotect_fixup+0x8d2/0xb30 [ 58.461041] do_mprotect_pkey+0x87e/0xd40 [ 58.461560] __x64_sys_mprotect+0x78/0xc0 [ 58.462082] do_syscall_64+0x3f/0x90 [ 58.462552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.463183] [ 58.463396] Freed by task 213: [ 58.463782] kasan_save_stack+0x22/0x50 [ 58.464294] kasan_set_track+0x25/0x30 [ 58.464783] kasan_save_free_info+0x2b/0x50 [ 58.465306] __kasan_slab_free+0x10a/0x190 [ 58.465836] kmem_cache_free+0x10d/0x4d0 [ 58.466347] rcu_core+0x8c8/0x2860 [ 58.466789] __do_softirq+0x1b7/0x7d4 [ 58.467259] [ 58.467474] Last potentially related work creation: [ 58.468072] kasan_save_stack+0x22/0x50 [ 58.468578] __kasan_record_aux_stack+0x8e/0xa0 [ 58.469148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.469782] remove_vma+0x139/0x170 [ 58.470229] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.470784] do_vmi_munmap+0x1f1/0x2b0 [ 58.471265] __vm_munmap+0x138/0x3a0 [ 58.471734] __x64_sys_munmap+0x59/0x80 [ 58.472238] do_syscall_64+0x3f/0x90 [ 58.472708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.473343] [ 58.473556] Second to last potentially related work creation: [ 58.474233] kasan_save_stack+0x22/0x50 [ 58.474737] __kasan_record_aux_stack+0x8e/0xa0 [ 58.475305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.475939] remove_vma+0x139/0x170 [ 58.476408] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.476973] do_vmi_munmap+0x1f1/0x2b0 [ 58.477463] mmap_region+0x1f9/0x2660 [ 58.477939] do_mmap+0x854/0xf00 [ 58.478365] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.478855] ksys_mmap_pgoff+0x3af/0x500 [ 58.479350] do_syscall_64+0x3f/0x90 [ 58.479816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.480466] [ 58.480681] The buggy address belongs to the object at ffff8880169fc488 [ 58.480681] which belongs to the cache vm_area_struct of size 168 [ 58.482151] The buggy address is located 88 bytes inside of [ 58.482151] freed 168-byte region [ffff8880169fc488, ffff8880169fc530) [ 58.483556] [ 58.483772] The buggy address belongs to the physical page: [ 58.484472] page:00000000bc0972cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169fc [ 58.485613] memcg:ffff88801a110f01 [ 58.486067] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 58.486800] page_type: 0xffffffff() [ 58.487269] raw: 0100000000000200 ffff88800879fc80 ffffea0000684440 dead000000000003 [ 58.488256] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a110f01 [ 58.489233] page dumped because: kasan: bad access detected [ 58.489940] [ 58.490166] Memory state around the buggy address: [ 58.490793] ffff8880169fc380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.491717] ffff8880169fc400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 58.492649] >ffff8880169fc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.493550] ^ [ 58.494318] ffff8880169fc500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 58.495261] ffff8880169fc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.496162] ================================================================== [ 58.497098] Disabling lock debugging due to kernel taint [ 61.225557] BUG: Bad rss-counter state mm:00000000136e4377 type:MM_FILEPAGES val:33 [ 61.226514] BUG: Bad rss-counter state mm:00000000136e4377 type:MM_ANONPAGES val:22 [ 61.676428] BUG: Bad rss-counter state mm:000000005f2f226e type:MM_FILEPAGES val:33 [ 61.677412] BUG: Bad rss-counter state mm:000000005f2f226e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39234' (ECDSA) to the list of known hosts. 2023/06/20 07:44:35 fuzzer started 2023/06/20 07:44:35 dialing manager at localhost:44161 2023/06/20 07:44:35 checking machine... 2023/06/20 07:44:35 checking revisions... [ 62.389106] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:44:35 testing simple program... [ 62.440990] cgroup: Unknown subsys name 'net' [ 62.491823] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:44:08 Registers: info registers vcpu 0 RAX=ffff88801a3f7f58 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801a3f7f01 RSI=ffff88801a3f7f18 RDI=ffff88801a3f7f18 RBP=ffff88801a3f7af0 RSP=ffff88801a3f7a28 R8 =0000000000000001 R9 =ffff88801a3f7ad8 R10=0000000000038001 R11=000000000001047e R12=ffff88801a3f7af8 R13=ffff88801a3f7ae0 R14=ffff88801a3f7f18 R15=ffff88801a3f7a98 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f968ae88900 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=00007ffedfb4a000 CR3=0000000014732000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fe38e3d03b0 CR3=000000000d678000 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=4e2fbe7706d31d8798416bb3f818e7f9 XMM02=0000000000123a58ec2efd57dc4c00df XMM03=000000000012a358e6a79cd7933cbd00 XMM04=9bfe6cc5718924ea00000000000ae988 XMM05=b1d207be64fcd5c1000000000013c358 XMM06=4fda316b135da52b000000000013b780 XMM07=e042d86d42eb936e000000000012ad40 XMM08=e6a79cd7933cbd000000000000123ab8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000