syzkaller login: [ 135.127580] BUG: Bad rss-counter state mm:0000000060f1a6ad type:MM_FILEPAGES val:33 [ 135.128825] BUG: Bad rss-counter state mm:0000000060f1a6ad type:MM_ANONPAGES val:22 [ 135.169709] ================================================================== [ 135.170801] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 135.171876] Read of size 8 at addr ffff88800d6a3d08 by task sshd/220 [ 135.172816] [ 135.173103] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 135.174327] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 135.175373] Call Trace: [ 135.175725] [ 135.176100] dump_stack_lvl+0x91/0xf0 [ 135.176689] print_report+0xcc/0x620 [ 135.177296] ? __virt_addr_valid+0x102/0x340 [ 135.177869] ? vma_interval_tree_remove+0xc75/0xec0 [ 135.178510] ? vma_interval_tree_remove+0xc75/0xec0 [ 135.179147] kasan_report+0xbe/0xf0 [ 135.179663] ? vma_interval_tree_remove+0xc75/0xec0 [ 135.180307] vma_interval_tree_remove+0xc75/0xec0 [ 135.180922] vma_prepare+0xc54/0x11a0 [ 135.181414] __split_vma+0x5af/0x950 [ 135.181909] ? __pfx___split_vma+0x10/0x10 [ 135.182458] ? find_held_lock+0x2c/0x110 [ 135.182992] do_vmi_align_munmap+0x2ba/0x11f0 [ 135.183586] ? lock_is_held_type+0x9f/0x120 [ 135.184148] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 135.184775] ? mtree_range_walk+0x632/0x900 [ 135.185349] ? mas_walk+0x5c7/0x7c0 [ 135.185831] do_vmi_munmap+0x1f1/0x2b0 [ 135.186342] mmap_region+0x1f9/0x2660 [ 135.186846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 135.187389] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 135.188130] ? __pfx_lock_acquire+0x10/0x10 [ 135.188677] ? __pfx_mmap_region+0x10/0x10 [ 135.189223] ? security_mmap_addr+0x7d/0xa0 [ 135.189776] ? get_unmapped_area+0x1f5/0x3f0 [ 135.190339] do_mmap+0x854/0xf00 [ 135.190792] vm_mmap_pgoff+0x1a6/0x3a0 [ 135.191322] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 135.191912] ksys_mmap_pgoff+0x3af/0x500 [ 135.192437] do_syscall_64+0x3f/0x90 [ 135.192931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 135.193595] RIP: 0033:0x7f049108bd82 [ 135.194067] 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 [ 135.196292] RSP: 002b:00007ffe6265d7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 135.197226] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f049108bd82 [ 135.198122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04904c5000 [ 135.199014] RBP: 00007f04904c5000 R08: 0000000000000009 R09: 0000000000001000 [ 135.199894] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556aa69d7d90 [ 135.200780] R13: 00007ffe6265d800 R14: 00007ffe6265d830 R15: 00007ffe6265db90 [ 135.201677] [ 135.201978] [ 135.202201] Allocated by task 213: [ 135.202648] kasan_save_stack+0x22/0x50 [ 135.203175] kasan_set_track+0x25/0x30 [ 135.203697] __kasan_slab_alloc+0x59/0x70 [ 135.204234] kmem_cache_alloc+0x16b/0x370 [ 135.204766] vm_area_dup+0x20/0x160 [ 135.205231] __split_vma+0x170/0x950 [ 135.205723] split_vma+0xc6/0x110 [ 135.206185] mprotect_fixup+0x8d2/0xb30 [ 135.206714] do_mprotect_pkey+0x87e/0xd40 [ 135.207251] __x64_sys_mprotect+0x78/0xc0 [ 135.207818] do_syscall_64+0x3f/0x90 [ 135.208307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 135.208968] [ 135.209188] Freed by task 213: [ 135.209595] kasan_save_stack+0x22/0x50 [ 135.210124] kasan_set_track+0x25/0x30 [ 135.210631] kasan_save_free_info+0x2b/0x50 [ 135.211184] __kasan_slab_free+0x10a/0x190 [ 135.211749] kmem_cache_free+0x10d/0x4d0 [ 135.212278] rcu_core+0x8c8/0x2860 [ 135.212748] __do_softirq+0x1b7/0x7d4 [ 135.213240] [ 135.213457] Last potentially related work creation: [ 135.214068] kasan_save_stack+0x22/0x50 [ 135.214655] __kasan_record_aux_stack+0x8e/0xa0 [ 135.215255] __call_rcu_common.constprop.0+0x6a/0xb90 [ 135.215936] remove_vma+0x139/0x170 [ 135.216401] do_vmi_align_munmap+0xd4a/0x11f0 [ 135.216980] do_vmi_munmap+0x1f1/0x2b0 [ 135.217487] __vm_munmap+0x138/0x3a0 [ 135.217980] __x64_sys_munmap+0x59/0x80 [ 135.218495] do_syscall_64+0x3f/0x90 [ 135.218989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 135.219663] [ 135.219885] The buggy address belongs to the object at ffff88800d6a3cb0 [ 135.219885] which belongs to the cache vm_area_struct of size 168 [ 135.221424] The buggy address is located 88 bytes inside of [ 135.221424] freed 168-byte region [ffff88800d6a3cb0, ffff88800d6a3d58) [ 135.222895] [ 135.223121] The buggy address belongs to the physical page: [ 135.223815] page:000000005a46a3f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6a3 [ 135.224947] memcg:ffff88800b8a0a01 [ 135.225385] flags: 0x100000000000200(slab|node=0|zone=1) [ 135.226053] page_type: 0xffffffff() [ 135.226516] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 135.227492] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b8a0a01 [ 135.228444] page dumped because: kasan: bad access detected [ 135.229141] [ 135.229361] Memory state around the buggy address: [ 135.229975] ffff88800d6a3c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 135.230869] ffff88800d6a3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 135.231779] >ffff88800d6a3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 135.232673] ^ [ 135.233126] ffff88800d6a3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 135.234015] ffff88800d6a3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 135.234900] ================================================================== [ 135.235875] Disabling lock debugging due to kernel taint [ 137.151263] BUG: Bad rss-counter state mm:00000000164780b4 type:MM_FILEPAGES val:33 [ 137.152281] BUG: Bad rss-counter state mm:00000000164780b4 type:MM_ANONPAGES val:22 [ 137.744829] BUG: Bad rss-counter state mm:000000003421f21c type:MM_FILEPAGES val:33 [ 137.745990] BUG: Bad rss-counter state mm:000000003421f21c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45070' (ECDSA) to the list of known hosts. 2023/06/19 19:57:19 fuzzer started 2023/06/19 19:57:19 dialing manager at localhost:44161 2023/06/19 19:57:19 checking machine... 2023/06/19 19:57:19 checking revisions... [ 138.378654] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:57:19 testing simple program... [ 138.422094] cgroup: Unknown subsys name 'net' [ 138.464852] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:56:05 Registers: info registers vcpu 0 RAX=1ffff110027cc51d RBX=ffff888013e628b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888013e628e8 RBP=ffff88800b5a22f0 RSP=ffff888018fafa38 R8 =0000000000000001 R9 =ffffed10031f5f3b R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800b856400 R14=ffffffff83677d48 R15=0000000000000024 RIP=ffffffff81846362 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 00007fc49f48f900 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=00007ffe1dc07000 CR3=000000000e486000 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=00007f0e53a3aff0 CR3=000000000c7ec000 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=443aabcfb21942987e4dc7f755d726a8 XMM02=0000000000125820ec2efd57dc4c00df XMM03=000000000012ccc8f0ed144f3ff04a71 XMM04=47f45a8c7eb7f15a00000000000ae988 XMM05=8166b598df87a01c000000000013d460 XMM06=00c3ffa147b8d857000000000013c500 XMM07=e042d86d42eb936e000000000012cf48 XMM08=f0ed144f3ff04a710000000000125880 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000