syzkaller login: [ 38.812174] BUG: Bad rss-counter state mm:00000000c20385eb type:MM_FILEPAGES val:33 [ 38.813769] BUG: Bad rss-counter state mm:00000000c20385eb type:MM_ANONPAGES val:22 [ 38.965560] ================================================================== [ 38.966508] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.967444] Read of size 8 at addr ffff88800b35bd08 by task sshd/219 [ 38.968369] [ 38.968585] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.969447] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.970446] Call Trace: [ 38.970773] [ 38.971062] dump_stack_lvl+0x91/0xf0 [ 38.971558] print_report+0xcc/0x620 [ 38.972045] ? __virt_addr_valid+0x102/0x340 [ 38.972605] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.973221] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.973863] kasan_report+0xbe/0xf0 [ 38.974355] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.974980] vma_interval_tree_remove+0xc75/0xec0 [ 38.975602] vma_prepare+0xc54/0x11a0 [ 38.976111] __split_vma+0x5af/0x950 [ 38.976607] ? __pfx___split_vma+0x10/0x10 [ 38.977132] ? find_held_lock+0x2c/0x110 [ 38.977687] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.978282] ? lock_is_held_type+0x9f/0x120 [ 38.978810] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.979414] ? mtree_range_walk+0x632/0x900 [ 38.979990] ? mas_walk+0x5c7/0x7c0 [ 38.980485] do_vmi_munmap+0x1f1/0x2b0 [ 38.980987] mmap_region+0x1f9/0x2660 [ 38.981470] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.981988] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.982703] ? __pfx_lock_acquire+0x10/0x10 [ 38.983235] ? __pfx_mmap_region+0x10/0x10 [ 38.983763] ? security_mmap_addr+0x7d/0xa0 [ 38.984295] ? get_unmapped_area+0x1f5/0x3f0 [ 38.984860] do_mmap+0x854/0xf00 [ 38.985312] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.985818] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.986387] ksys_mmap_pgoff+0x3af/0x500 [ 38.986907] do_syscall_64+0x3f/0x90 [ 38.987394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.988040] RIP: 0033:0x7f33ee85bd82 [ 38.988490] 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 [ 38.990670] RSP: 002b:00007ffd3c7c6e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.991570] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33ee85bd82 [ 38.992413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33edc95000 [ 38.993249] RBP: 00007f33edc95000 R08: 0000000000000009 R09: 0000000000001000 [ 38.994095] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561805633ec0 [ 38.994932] R13: 00007ffd3c7c6e80 R14: 00007ffd3c7c6eb0 R15: 00007ffd3c7c7210 [ 38.995779] [ 38.996067] [ 38.996282] Allocated by task 212: [ 38.996705] kasan_save_stack+0x22/0x50 [ 38.997206] kasan_set_track+0x25/0x30 [ 38.997699] __kasan_slab_alloc+0x59/0x70 [ 38.998215] kmem_cache_alloc+0x16b/0x370 [ 38.998725] vm_area_dup+0x20/0x160 [ 38.999176] __split_vma+0x170/0x950 [ 38.999639] split_vma+0xc6/0x110 [ 39.000072] mprotect_fixup+0x8d2/0xb30 [ 39.000565] do_mprotect_pkey+0x87e/0xd40 [ 39.001080] __x64_sys_mprotect+0x78/0xc0 [ 39.001597] do_syscall_64+0x3f/0x90 [ 39.002090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.002724] [ 39.002937] Freed by task 212: [ 39.003327] kasan_save_stack+0x22/0x50 [ 39.003825] kasan_set_track+0x25/0x30 [ 39.004318] kasan_save_free_info+0x2b/0x50 [ 39.004844] __kasan_slab_free+0x10a/0x190 [ 39.005369] kmem_cache_free+0x10d/0x4d0 [ 39.005882] rcu_core+0x8c8/0x2860 [ 39.006318] __do_softirq+0x1b7/0x7d4 [ 39.006790] [ 39.007003] Last potentially related work creation: [ 39.007591] kasan_save_stack+0x22/0x50 [ 39.008086] __kasan_record_aux_stack+0x8e/0xa0 [ 39.008658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.009296] remove_vma+0x139/0x170 [ 39.009807] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.010360] do_vmi_munmap+0x1f1/0x2b0 [ 39.010836] __vm_munmap+0x138/0x3a0 [ 39.011295] __x64_sys_munmap+0x59/0x80 [ 39.011787] do_syscall_64+0x3f/0x90 [ 39.012254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.012895] [ 39.013109] Second to last potentially related work creation: [ 39.013796] kasan_save_stack+0x22/0x50 [ 39.014290] __kasan_record_aux_stack+0x8e/0xa0 [ 39.014858] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.015496] remove_vma+0x139/0x170 [ 39.015937] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.016491] do_vmi_munmap+0x1f1/0x2b0 [ 39.016971] mmap_region+0x1f9/0x2660 [ 39.017442] do_mmap+0x854/0xf00 [ 39.017868] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.018352] ksys_mmap_pgoff+0x3af/0x500 [ 39.018849] do_syscall_64+0x3f/0x90 [ 39.019323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.019956] [ 39.020175] The buggy address belongs to the object at ffff88800b35bcb0 [ 39.020175] which belongs to the cache vm_area_struct of size 168 [ 39.021618] The buggy address is located 88 bytes inside of [ 39.021618] freed 168-byte region [ffff88800b35bcb0, ffff88800b35bd58) [ 39.023030] [ 39.023247] The buggy address belongs to the physical page: [ 39.023896] page:000000005c2e9af2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb35b [ 39.024971] memcg:ffff88800d359e01 [ 39.025401] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.026099] page_type: 0xffffffff() [ 39.026545] raw: 0100000000000200 ffff8880087a0c80 ffffea0000677c00 dead000000000003 [ 39.027460] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d359e01 [ 39.028356] page dumped because: kasan: bad access detected [ 39.029002] [ 39.029217] Memory state around the buggy address: [ 39.029795] ffff88800b35bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.030637] ffff88800b35bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.031482] >ffff88800b35bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.032333] ^ [ 39.032768] ffff88800b35bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.033613] ffff88800b35be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.034470] ================================================================== [ 39.035368] Disabling lock debugging due to kernel taint [ 41.239638] BUG: Bad rss-counter state mm:000000006b1dc408 type:MM_FILEPAGES val:33 [ 41.240798] BUG: Bad rss-counter state mm:000000006b1dc408 type:MM_ANONPAGES val:22 [ 41.733716] BUG: Bad rss-counter state mm:00000000070ced85 type:MM_FILEPAGES val:33 [ 41.734705] BUG: Bad rss-counter state mm:00000000070ced85 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32069' (ECDSA) to the list of known hosts. 2023/06/21 06:37:19 fuzzer started 2023/06/21 06:37:19 dialing manager at localhost:36067 2023/06/21 06:37:19 checking machine... 2023/06/21 06:37:19 checking revisions... [ 42.446504] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:37:19 testing simple program... [ 42.490789] cgroup: Unknown subsys name 'net' [ 42.535686] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:37:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86138e8c RDX=1ffff1100d9c135a RSI=1ffff1100d9c1359 RDI=1ffff1100d9c1359 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff86138e90 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09dc0 R15=ffff88806ce09a70 RIP=ffffffff811310ce 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 00007f0b664b1900 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=00005575c36b7b88 CR3=000000001cde8000 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=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 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=0000000000000001 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=00007f2d4bd5af20 CR3=000000000d90a000 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=971e988083c2d9af6d46cd85a8266294 XMM02=2c67c8bc2e329bc3000000000011d9f8 XMM03=fb795ef6d65770560000000000121970 XMM04=90db07950192ebb200000000000ae988 XMM05=dfcdbad4f1609c370000000000132858 XMM06=734ad1f785b468b90000000000131a30 XMM07=e042d86d42eb936e0000000000121c48 XMM08=e9fe04cefc6b627c000000000011da58 XMM09=00000000000000000000000000000000 XMM10=20200000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000