syzkaller login: [ 132.962601] BUG: Bad rss-counter state mm:000000007ecdaf29 type:MM_FILEPAGES val:33 [ 132.964217] BUG: Bad rss-counter state mm:000000007ecdaf29 type:MM_ANONPAGES val:22 [ 133.125790] ================================================================== [ 133.127264] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 133.128588] Read of size 8 at addr ffff88800ef80058 by task sshd/219 [ 133.129701] [ 133.130014] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 133.131492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 133.132746] Call Trace: [ 133.133127] [ 133.133467] dump_stack_lvl+0x91/0xf0 [ 133.134051] print_report+0xcc/0x620 [ 133.134629] ? __virt_addr_valid+0x102/0x340 [ 133.135296] ? vma_interval_tree_remove+0xc75/0xec0 [ 133.136031] ? vma_interval_tree_remove+0xc75/0xec0 [ 133.136756] kasan_report+0xbe/0xf0 [ 133.137324] ? vma_interval_tree_remove+0xc75/0xec0 [ 133.138061] vma_interval_tree_remove+0xc75/0xec0 [ 133.138779] vma_prepare+0xc54/0x11a0 [ 133.139375] __split_vma+0x5af/0x950 [ 133.139935] ? __pfx___split_vma+0x10/0x10 [ 133.140553] ? find_held_lock+0x2c/0x110 [ 133.141182] do_vmi_align_munmap+0x2ba/0x11f0 [ 133.141857] ? lock_is_held_type+0x9f/0x120 [ 133.142488] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 133.143223] ? mtree_range_walk+0x632/0x900 [ 133.143886] ? mas_walk+0x5c7/0x7c0 [ 133.144451] do_vmi_munmap+0x1f1/0x2b0 [ 133.145040] mmap_region+0x1f9/0x2660 [ 133.145620] ? vm_mmap_pgoff+0x15c/0x3a0 [ 133.146220] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 133.147084] ? __pfx_lock_acquire+0x10/0x10 [ 133.147739] ? __pfx_mmap_region+0x10/0x10 [ 133.148361] ? security_mmap_addr+0x7d/0xa0 [ 133.148996] ? get_unmapped_area+0x1f5/0x3f0 [ 133.149641] do_mmap+0x854/0xf00 [ 133.150158] vm_mmap_pgoff+0x1a6/0x3a0 [ 133.150742] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 133.151432] ksys_mmap_pgoff+0x3af/0x500 [ 133.152033] do_syscall_64+0x3f/0x90 [ 133.152605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 133.153369] RIP: 0033:0x7f468698ed82 [ 133.153925] 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 [ 133.156431] RSP: 002b:00007ffe2394ee08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 133.157494] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f468698ed82 [ 133.158488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4685dc8000 [ 133.159519] RBP: 00007f4685dc8000 R08: 0000000000000009 R09: 0000000000001000 [ 133.160496] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae8feebb20 [ 133.161485] R13: 00007ffe2394ee20 R14: 00007ffe2394ee50 R15: 00007ffe2394f1b0 [ 133.162493] [ 133.162834] [ 133.163090] Allocated by task 212: [ 133.163599] kasan_save_stack+0x22/0x50 [ 133.164185] kasan_set_track+0x25/0x30 [ 133.164770] __kasan_slab_alloc+0x59/0x70 [ 133.165379] kmem_cache_alloc+0x16b/0x370 [ 133.165987] vm_area_dup+0x20/0x160 [ 133.166517] __split_vma+0x170/0x950 [ 133.167083] split_vma+0xc6/0x110 [ 133.167604] mprotect_fixup+0x8d2/0xb30 [ 133.168271] do_mprotect_pkey+0x87e/0xd40 [ 133.168878] __x64_sys_mprotect+0x78/0xc0 [ 133.169493] do_syscall_64+0x3f/0x90 [ 133.170034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 133.170785] [ 133.171048] Freed by task 212: [ 133.171510] kasan_save_stack+0x22/0x50 [ 133.172093] kasan_set_track+0x25/0x30 [ 133.172663] kasan_save_free_info+0x2b/0x50 [ 133.173284] __kasan_slab_free+0x10a/0x190 [ 133.173893] kmem_cache_free+0x10d/0x4d0 [ 133.174487] rcu_core+0x8c8/0x2860 [ 133.175003] __do_softirq+0x1b7/0x7d4 [ 133.175569] [ 133.175816] Last potentially related work creation: [ 133.176486] kasan_save_stack+0x22/0x50 [ 133.177071] __kasan_record_aux_stack+0x8e/0xa0 [ 133.177712] __call_rcu_common.constprop.0+0x6a/0xb90 [ 133.178443] remove_vma+0x139/0x170 [ 133.178942] do_vmi_align_munmap+0xd4a/0x11f0 [ 133.179604] do_vmi_munmap+0x1f1/0x2b0 [ 133.180165] __vm_munmap+0x138/0x3a0 [ 133.180682] __x64_sys_munmap+0x59/0x80 [ 133.181242] do_syscall_64+0x3f/0x90 [ 133.181775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 133.182494] [ 133.182731] The buggy address belongs to the object at ffff88800ef80000 [ 133.182731] which belongs to the cache vm_area_struct of size 168 [ 133.184362] The buggy address is located 88 bytes inside of [ 133.184362] freed 168-byte region [ffff88800ef80000, ffff88800ef800a8) [ 133.185910] [ 133.186150] The buggy address belongs to the physical page: [ 133.186899] page:00000000926efbba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef80 [ 133.188138] memcg:ffff88800c567d01 [ 133.188628] flags: 0x100000000000200(slab|node=0|zone=1) [ 133.189343] page_type: 0xffffffff() [ 133.189848] raw: 0100000000000200 ffff88800879fc80 ffffea0000269300 dead000000000002 [ 133.190887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c567d01 [ 133.191916] page dumped because: kasan: bad access detected [ 133.192650] [ 133.192906] Memory state around the buggy address: [ 133.193565] ffff88800ef7ff00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 133.194525] ffff88800ef7ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 133.195496] >ffff88800ef80000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 133.196452] ^ [ 133.197263] ffff88800ef80080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 133.198204] ffff88800ef80100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 133.199183] ================================================================== [ 133.200321] Disabling lock debugging due to kernel taint [ 135.849021] BUG: Bad rss-counter state mm:00000000ea05dbc6 type:MM_FILEPAGES val:33 [ 135.850064] BUG: Bad rss-counter state mm:00000000ea05dbc6 type:MM_ANONPAGES val:22 [ 136.373829] BUG: Bad rss-counter state mm:00000000d541d7b0 type:MM_FILEPAGES val:33 [ 136.376024] BUG: Bad rss-counter state mm:00000000d541d7b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9654' (ECDSA) to the list of known hosts. 2023/06/20 04:21:19 fuzzer started 2023/06/20 04:21:19 dialing manager at localhost:44161 2023/06/20 04:21:19 checking machine... 2023/06/20 04:21:19 checking revisions... [ 137.093347] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:21:19 testing simple program... [ 137.142227] cgroup: Unknown subsys name 'net' [ 137.208834] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:19:38 Registers: info registers vcpu 0 RAX=ffff888015857d88 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11002b0afb1 RSI=ffffffff8199aeab RDI=ffff888015857bc8 RBP=ffff88800c787000 RSP=ffff888015857c30 R8 =0000000000000001 R9 =ffffed1002b0af79 R10=0000000000000003 R11=0000000000000000 R12=ffff888015857d88 R13=ffff88800c787130 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff814c07e0 RFL=00000046 [---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 00007f66a575e900 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=00007f66a4bbd0c0 CR3=000000000ca4a000 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=1ff80c99bb43aebe4c4f5eb2fd6f16b4 XMM02=ec2efd57dc4c00df0000000000130e20 XMM03=0a0356832a472d510000000000130ef0 XMM04=e703a399f73db2eb00000000000ae988 XMM05=639349e8142a311c0000000000148880 XMM06=806171799158d9670000000000147ca8 XMM07=e042d86d42eb936e00000000001385d8 XMM08=0a0356832a472d510000000000130ef0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007ffc6e379000 CR3=000000000e48e000 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=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