syzkaller login: [ 30.032687] BUG: Bad rss-counter state mm:000000006b17fde8 type:MM_FILEPAGES val:33 [ 30.034021] BUG: Bad rss-counter state mm:000000006b17fde8 type:MM_ANONPAGES val:22 [ 30.212147] ================================================================== [ 30.213253] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.214373] Read of size 8 at addr ffff888006aa2d08 by task sshd/220 [ 30.215436] [ 30.215700] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.216761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.217806] Call Trace: [ 30.218131] [ 30.218416] dump_stack_lvl+0x91/0xf0 [ 30.218918] print_report+0xcc/0x620 [ 30.219419] ? __virt_addr_valid+0x102/0x340 [ 30.219986] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.220624] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.221248] kasan_report+0xbe/0xf0 [ 30.221722] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.222338] vma_interval_tree_remove+0xc75/0xec0 [ 30.222937] vma_prepare+0xc54/0x11a0 [ 30.223413] __split_vma+0x5af/0x950 [ 30.223884] ? __pfx___split_vma+0x10/0x10 [ 30.224431] ? find_held_lock+0x2c/0x110 [ 30.224952] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.225519] ? lock_is_held_type+0x9f/0x120 [ 30.226057] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.226671] ? mtree_range_walk+0x632/0x900 [ 30.227230] ? mas_walk+0x5c7/0x7c0 [ 30.227708] do_vmi_munmap+0x1f1/0x2b0 [ 30.228199] mmap_region+0x1f9/0x2660 [ 30.228699] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.229215] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.229929] ? __pfx_lock_acquire+0x10/0x10 [ 30.230477] ? __pfx_mmap_region+0x10/0x10 [ 30.231014] ? security_mmap_addr+0x7d/0xa0 [ 30.231563] ? get_unmapped_area+0x1f5/0x3f0 [ 30.232118] do_mmap+0x854/0xf00 [ 30.232580] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.233096] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.233677] ksys_mmap_pgoff+0x3af/0x500 [ 30.234198] do_syscall_64+0x3f/0x90 [ 30.234688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.235346] RIP: 0033:0x7fa747bb5d82 [ 30.235812] 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 [ 30.237988] RSP: 002b:00007ffe9f3dbd28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.238894] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa747bb5d82 [ 30.239735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa746fef000 [ 30.240589] RBP: 00007fa746fef000 R08: 0000000000000009 R09: 0000000000001000 [ 30.241428] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652f7d09d90 [ 30.242281] R13: 00007ffe9f3dbd40 R14: 00007ffe9f3dbd70 R15: 00007ffe9f3dc0d0 [ 30.243133] [ 30.243423] [ 30.243641] Allocated by task 213: [ 30.244065] kasan_save_stack+0x22/0x50 [ 30.244581] kasan_set_track+0x25/0x30 [ 30.245094] __kasan_slab_alloc+0x59/0x70 [ 30.245622] kmem_cache_alloc+0x16b/0x370 [ 30.246145] vm_area_dup+0x20/0x160 [ 30.246595] __split_vma+0x170/0x950 [ 30.247061] split_vma+0xc6/0x110 [ 30.247500] mprotect_fixup+0x8d2/0xb30 [ 30.247999] do_mprotect_pkey+0x87e/0xd40 [ 30.248542] __x64_sys_mprotect+0x78/0xc0 [ 30.249061] do_syscall_64+0x3f/0x90 [ 30.249536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.250181] [ 30.250398] Freed by task 19: [ 30.250786] kasan_save_stack+0x22/0x50 [ 30.251291] kasan_set_track+0x25/0x30 [ 30.251796] kasan_save_free_info+0x2b/0x50 [ 30.252336] __kasan_slab_free+0x10a/0x190 [ 30.252868] kmem_cache_free+0x10d/0x4d0 [ 30.253379] rcu_core+0x8c8/0x2860 [ 30.253824] __do_softirq+0x1b7/0x7d4 [ 30.254303] [ 30.254519] Last potentially related work creation: [ 30.255116] kasan_save_stack+0x22/0x50 [ 30.255623] __kasan_record_aux_stack+0x8e/0xa0 [ 30.256258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.256943] remove_vma+0x139/0x170 [ 30.257404] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.257991] do_vmi_munmap+0x1f1/0x2b0 [ 30.258479] __vm_munmap+0x138/0x3a0 [ 30.258952] __x64_sys_munmap+0x59/0x80 [ 30.259466] do_syscall_64+0x3f/0x90 [ 30.259966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.260624] [ 30.260847] The buggy address belongs to the object at ffff888006aa2cb0 [ 30.260847] which belongs to the cache vm_area_struct of size 168 [ 30.262341] The buggy address is located 88 bytes inside of [ 30.262341] freed 168-byte region [ffff888006aa2cb0, ffff888006aa2d58) [ 30.263778] [ 30.264003] The buggy address belongs to the physical page: [ 30.264698] page:00000000913c5801 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6aa2 [ 30.265825] memcg:ffff888006aa3001 [ 30.266270] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.266944] page_type: 0xffffffff() [ 30.267414] raw: 0100000000000200 ffff8880087a0c80 ffffea000035b3c0 0000000000000004 [ 30.268404] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006aa3001 [ 30.269353] page dumped because: kasan: bad access detected [ 30.270039] [ 30.270262] Memory state around the buggy address: [ 30.270868] ffff888006aa2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.271762] ffff888006aa2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.272667] >ffff888006aa2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.273553] ^ [ 30.274010] ffff888006aa2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.274902] ffff888006aa2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.275790] ================================================================== [ 30.276795] Disabling lock debugging due to kernel taint [ 32.283130] BUG: Bad rss-counter state mm:0000000098e3b200 type:MM_FILEPAGES val:32 [ 32.284297] BUG: Bad rss-counter state mm:0000000098e3b200 type:MM_ANONPAGES val:22 [ 32.720293] BUG: Bad rss-counter state mm:00000000ace08d48 type:MM_FILEPAGES val:33 [ 32.721772] BUG: Bad rss-counter state mm:00000000ace08d48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53218' (ECDSA) to the list of known hosts. 2023/06/20 21:34:39 fuzzer started 2023/06/20 21:34:40 dialing manager at localhost:36067 2023/06/20 21:34:40 checking machine... 2023/06/20 21:34:40 checking revisions... [ 33.442408] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:34:40 testing simple program... [ 33.487052] cgroup: Unknown subsys name 'net' [ 33.533764] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:34:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85d899fc RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff8880168df600 R8 =ffffffff8608a556 R9 =ffff8880168df748 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d899f8 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc6b 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 00007f3a31875900 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=00007ffd5d825000 CR3=000000001893e000 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=6720646572637465733a4d41503d706f 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=ffff888008c04400 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=00007f40e1b198d0 CR3=000000000d742000 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=c9c7ea0c9759bab4f444c79f9325ee99 XMM02=000000000011d6d8eff9b2d0a8fce9cb XMM03=000000000011d7a82c67c8bc2e329bc3 XMM04=4e0a9b487ef1722400000000000ae988 XMM05=19e9129bd510f2350000000000131da8 XMM06=4fda316b135da52b0000000000131c30 XMM07=e042d86d42eb936e0000000000121e98 XMM08=b30de2f711126331000000000011d7a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000