syzkaller login: [ 39.109531] BUG: Bad rss-counter state mm:00000000eda2504f type:MM_FILEPAGES val:33 [ 39.110830] BUG: Bad rss-counter state mm:00000000eda2504f type:MM_ANONPAGES val:22 [ 39.149733] ================================================================== [ 39.150857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.151961] Read of size 8 at addr ffff888006a5e228 by task sshd/219 [ 39.152871] [ 39.153126] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.154141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.155288] Call Trace: [ 39.155664] [ 39.156001] dump_stack_lvl+0x91/0xf0 [ 39.156573] print_report+0xcc/0x620 [ 39.157136] ? __virt_addr_valid+0x102/0x340 [ 39.157771] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.158490] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.159248] kasan_report+0xbe/0xf0 [ 39.159853] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.160532] vma_interval_tree_remove+0xc75/0xec0 [ 39.161126] vma_prepare+0xc54/0x11a0 [ 39.161594] __split_vma+0x5af/0x950 [ 39.162063] ? __pfx___split_vma+0x10/0x10 [ 39.162584] ? find_held_lock+0x2c/0x110 [ 39.163100] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.163673] ? lock_is_held_type+0x9f/0x120 [ 39.164210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.164811] ? mtree_range_walk+0x632/0x900 [ 39.165364] ? mas_walk+0x5c7/0x7c0 [ 39.165830] do_vmi_munmap+0x1f1/0x2b0 [ 39.166314] mmap_region+0x1f9/0x2660 [ 39.166790] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.167292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.167995] ? __pfx_lock_acquire+0x10/0x10 [ 39.168518] ? __pfx_mmap_region+0x10/0x10 [ 39.169050] ? security_mmap_addr+0x7d/0xa0 [ 39.169573] ? get_unmapped_area+0x1f5/0x3f0 [ 39.170119] do_mmap+0x854/0xf00 [ 39.170549] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.171034] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.171607] ksys_mmap_pgoff+0x3af/0x500 [ 39.172113] do_syscall_64+0x3f/0x90 [ 39.172583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.173223] RIP: 0033:0x7f64b2fead82 [ 39.173664] 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 [ 39.175758] RSP: 002b:00007ffc281494f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.176633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64b2fead82 [ 39.177629] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64b2424000 [ 39.178456] RBP: 00007f64b2424000 R08: 0000000000000009 R09: 0000000000001000 [ 39.179317] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559014074ec0 [ 39.180146] R13: 00007ffc28149510 R14: 00007ffc28149540 R15: 00007ffc281498a0 [ 39.180989] [ 39.181273] [ 39.181485] Allocated by task 212: [ 39.181906] kasan_save_stack+0x22/0x50 [ 39.182408] kasan_set_track+0x25/0x30 [ 39.182906] __kasan_slab_alloc+0x59/0x70 [ 39.183435] kmem_cache_alloc+0x16b/0x370 [ 39.183945] vm_area_dup+0x20/0x160 [ 39.184393] __split_vma+0x170/0x950 [ 39.184853] split_vma+0xc6/0x110 [ 39.185286] mprotect_fixup+0x8d2/0xb30 [ 39.185779] do_mprotect_pkey+0x87e/0xd40 [ 39.186294] __x64_sys_mprotect+0x78/0xc0 [ 39.186814] do_syscall_64+0x3f/0x90 [ 39.187294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.187925] [ 39.188136] Freed by task 212: [ 39.188512] kasan_save_stack+0x22/0x50 [ 39.189004] kasan_set_track+0x25/0x30 [ 39.189480] kasan_save_free_info+0x2b/0x50 [ 39.190005] __kasan_slab_free+0x10a/0x190 [ 39.190526] kmem_cache_free+0x10d/0x4d0 [ 39.191038] rcu_core+0x8c8/0x2860 [ 39.191496] __do_softirq+0x1b7/0x7d4 [ 39.191966] [ 39.192176] Last potentially related work creation: [ 39.192746] kasan_save_stack+0x22/0x50 [ 39.193241] __kasan_record_aux_stack+0x8e/0xa0 [ 39.193811] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.194444] remove_vma+0x139/0x170 [ 39.194883] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.195431] do_vmi_munmap+0x1f1/0x2b0 [ 39.195906] __vm_munmap+0x138/0x3a0 [ 39.196370] __x64_sys_munmap+0x59/0x80 [ 39.196853] do_syscall_64+0x3f/0x90 [ 39.197317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.197945] [ 39.198155] The buggy address belongs to the object at ffff888006a5e1d0 [ 39.198155] which belongs to the cache vm_area_struct of size 168 [ 39.199628] The buggy address is located 88 bytes inside of [ 39.199628] freed 168-byte region [ffff888006a5e1d0, ffff888006a5e278) [ 39.200997] [ 39.201207] The buggy address belongs to the physical page: [ 39.201859] page:000000008c3d1a24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6a5e [ 39.202916] memcg:ffff88801590a001 [ 39.203335] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.203977] page_type: 0xffffffff() [ 39.204414] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.205297] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801590a001 [ 39.206187] page dumped because: kasan: bad access detected [ 39.206832] [ 39.207045] Memory state around the buggy address: [ 39.207629] ffff888006a5e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.208455] ffff888006a5e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.209289] >ffff888006a5e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.210117] ^ [ 39.210651] ffff888006a5e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.211478] ffff888006a5e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.212282] ================================================================== [ 39.213483] Disabling lock debugging due to kernel taint [ 41.346990] BUG: Bad rss-counter state mm:00000000c867586a type:MM_FILEPAGES val:33 [ 41.348127] BUG: Bad rss-counter state mm:00000000c867586a type:MM_ANONPAGES val:22 [ 41.851606] BUG: Bad rss-counter state mm:00000000724872c4 type:MM_FILEPAGES val:33 [ 41.852546] BUG: Bad rss-counter state mm:00000000724872c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48305' (ECDSA) to the list of known hosts. 2023/06/19 14:51:56 fuzzer started 2023/06/19 14:51:57 dialing manager at localhost:44161 2023/06/19 14:51:57 checking machine... 2023/06/19 14:51:57 checking revisions... [ 42.526303] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:51:57 testing simple program... [ 42.570667] cgroup: Unknown subsys name 'net' [ 42.610152] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:51:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00005649cd899290 CR3=0000000005482000 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=00007efe79e47510000055dc7b34e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11003038e62 RSI=ffffffff8386dfaa RDI=ffff8880181c7310 RBP=ffff8880181c73a8 RSP=ffff8880181c72a0 R8 =0000000000000001 R9 =ffff8880181c7350 R10=0000000000038001 R11=0000000000091af6 R12=ffff8880181c73d8 R13=0000000000000000 R14=ffff88800e16d1c0 R15=ffff8880181c7310 RIP=ffffffff8113060b 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 00007fbcf8c42900 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=00007fbcf91f9618 CR3=000000000dc98000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000