syzkaller login: [ 92.921132] BUG: Bad rss-counter state mm:00000000c9a1bad8 type:MM_FILEPAGES val:33 [ 92.922622] BUG: Bad rss-counter state mm:00000000c9a1bad8 type:MM_ANONPAGES val:22 [ 93.091441] ================================================================== [ 93.092509] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 93.093705] Read of size 8 at addr ffff8880167fc6b0 by task sshd/227 [ 93.094597] [ 93.094848] CPU: 0 PID: 227 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 93.096080] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 93.097207] Call Trace: [ 93.097588] [ 93.097909] dump_stack_lvl+0x91/0xf0 [ 93.098465] print_report+0xcc/0x620 [ 93.099037] ? __virt_addr_valid+0x102/0x340 [ 93.099670] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.100381] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.101085] kasan_report+0xbe/0xf0 [ 93.101635] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.102329] vma_interval_tree_remove+0xc75/0xec0 [ 93.103033] vma_prepare+0xc54/0x11a0 [ 93.103602] __split_vma+0x5af/0x950 [ 93.104163] ? __pfx___split_vma+0x10/0x10 [ 93.104786] ? find_held_lock+0x2c/0x110 [ 93.105371] do_vmi_align_munmap+0x2ba/0x11f0 [ 93.106042] ? lock_is_held_type+0x9f/0x120 [ 93.106694] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 93.107406] ? mtree_range_walk+0x632/0x900 [ 93.108087] ? mas_walk+0x5c7/0x7c0 [ 93.108656] do_vmi_munmap+0x1f1/0x2b0 [ 93.109243] mmap_region+0x1f9/0x2660 [ 93.109830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 93.110445] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 93.111293] ? __pfx_lock_acquire+0x10/0x10 [ 93.111955] ? __pfx_mmap_region+0x10/0x10 [ 93.112616] ? security_mmap_addr+0x7d/0xa0 [ 93.113243] ? get_unmapped_area+0x1f5/0x3f0 [ 93.113914] do_mmap+0x854/0xf00 [ 93.114429] vm_mmap_pgoff+0x1a6/0x3a0 [ 93.115021] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 93.115708] ksys_mmap_pgoff+0x3af/0x500 [ 93.116314] do_syscall_64+0x3f/0x90 [ 93.116910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.117688] RIP: 0033:0x7fb76471ed82 [ 93.118220] 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 [ 93.120795] RSP: 002b:00007ffc82a078c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 93.121887] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb76471ed82 [ 93.122880] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb763b58000 [ 93.123881] RBP: 00007fb763b58000 R08: 0000000000000009 R09: 0000000000001000 [ 93.124886] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d4e347d90 [ 93.125885] R13: 00007ffc82a078e0 R14: 00007ffc82a07910 R15: 00007ffc82a07c70 [ 93.126913] [ 93.127249] [ 93.127511] Allocated by task 220: [ 93.128022] kasan_save_stack+0x22/0x50 [ 93.128627] kasan_set_track+0x25/0x30 [ 93.129197] __kasan_slab_alloc+0x59/0x70 [ 93.129838] kmem_cache_alloc+0x16b/0x370 [ 93.130439] vm_area_dup+0x20/0x160 [ 93.130979] __split_vma+0x170/0x950 [ 93.131547] split_vma+0xc6/0x110 [ 93.132088] mprotect_fixup+0x8d2/0xb30 [ 93.132691] do_mprotect_pkey+0x87e/0xd40 [ 93.133300] __x64_sys_mprotect+0x78/0xc0 [ 93.133915] do_syscall_64+0x3f/0x90 [ 93.134479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.135234] [ 93.135499] Freed by task 220: [ 93.135969] kasan_save_stack+0x22/0x50 [ 93.136598] kasan_set_track+0x25/0x30 [ 93.137170] kasan_save_free_info+0x2b/0x50 [ 93.137803] __kasan_slab_free+0x10a/0x190 [ 93.138422] kmem_cache_free+0x10d/0x4d0 [ 93.139032] rcu_core+0x8c8/0x2860 [ 93.139565] __do_softirq+0x1b7/0x7d4 [ 93.140137] [ 93.140390] Last potentially related work creation: [ 93.141077] kasan_save_stack+0x22/0x50 [ 93.141702] __kasan_record_aux_stack+0x8e/0xa0 [ 93.142372] __call_rcu_common.constprop.0+0x6a/0xb90 [ 93.143135] remove_vma+0x139/0x170 [ 93.143677] do_vmi_align_munmap+0xd4a/0x11f0 [ 93.144342] do_vmi_munmap+0x1f1/0x2b0 [ 93.144927] __vm_munmap+0x138/0x3a0 [ 93.145480] __x64_sys_munmap+0x59/0x80 [ 93.146046] do_syscall_64+0x3f/0x90 [ 93.146623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.147363] [ 93.147625] The buggy address belongs to the object at ffff8880167fc658 [ 93.147625] which belongs to the cache vm_area_struct of size 168 [ 93.149347] The buggy address is located 88 bytes inside of [ 93.149347] freed 168-byte region [ffff8880167fc658, ffff8880167fc700) [ 93.151013] [ 93.151259] The buggy address belongs to the physical page: [ 93.152085] page:000000003c73ebdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167fc [ 93.153361] memcg:ffff88801695b201 [ 93.153857] flags: 0x100000000000200(slab|node=0|zone=1) [ 93.154607] page_type: 0xffffffff() [ 93.155127] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 93.156177] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801695b201 [ 93.157258] page dumped because: kasan: bad access detected [ 93.158033] [ 93.158282] Memory state around the buggy address: [ 93.158965] ffff8880167fc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 93.159989] ffff8880167fc600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 93.160996] >ffff8880167fc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 93.162009] ^ [ 93.162697] ffff8880167fc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 93.163705] ffff8880167fc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 93.164728] ================================================================== [ 93.165871] Disabling lock debugging due to kernel taint [ 95.815881] BUG: Bad rss-counter state mm:000000008e8330d4 type:MM_FILEPAGES val:33 [ 95.817682] BUG: Bad rss-counter state mm:000000008e8330d4 type:MM_ANONPAGES val:22 [ 96.313000] BUG: Bad rss-counter state mm:00000000e88a31f8 type:MM_FILEPAGES val:33 [ 96.314232] BUG: Bad rss-counter state mm:00000000e88a31f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61256' (ECDSA) to the list of known hosts. 2023/06/19 10:51:53 fuzzer started 2023/06/19 10:51:54 dialing manager at localhost:44161 2023/06/19 10:51:54 checking machine... 2023/06/19 10:51:54 checking revisions... [ 97.003348] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:51:54 testing simple program... [ 97.052362] cgroup: Unknown subsys name 'net' [ 97.102284] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:50:52 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800f222670 RCX=ffffffff81370fff RDX=1ffff1100d9c747b RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81371069 RSP=ffff88806ce09dc8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000007f R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff81534237 RFL=00000002 [-------] 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 00007f5752523900 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=00007f5752ad8650 CR3=0000000013eb8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fc5482b4ef0 CR3=000000000c6cc000 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=5ea7250ec0590590684f5fec14545440 XMM02=0000000000121ce8ec2efd57dc4c00df XMM03=0000000000128de09d33b575e7af1461 XMM04=5d6e1585052748b700000000000ae988 XMM05=16bbfc4fa606b6250000000000138fb0 XMM06=a32423028e2d43360000000000137e18 XMM07=e042d86d42eb936e0000000000129060 XMM08=9d33b575e7af14610000000000121d48 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000