syzkaller login: [ 46.077917] BUG: Bad rss-counter state mm:000000003b399eda type:MM_FILEPAGES val:33 [ 46.079161] BUG: Bad rss-counter state mm:000000003b399eda type:MM_ANONPAGES val:22 [ 46.117236] ================================================================== [ 46.118300] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.119383] Read of size 8 at addr ffff88800df0b6b0 by task sshd/218 [ 46.120327] [ 46.120569] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.121527] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.122619] Call Trace: [ 46.122982] [ 46.123304] dump_stack_lvl+0x91/0xf0 [ 46.123829] print_report+0xcc/0x620 [ 46.124311] ? __virt_addr_valid+0x102/0x340 [ 46.125031] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.125653] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.126279] kasan_report+0xbe/0xf0 [ 46.126753] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.127375] vma_interval_tree_remove+0xc75/0xec0 [ 46.127976] vma_prepare+0xc54/0x11a0 [ 46.128448] __split_vma+0x5af/0x950 [ 46.128918] ? __pfx___split_vma+0x10/0x10 [ 46.129447] ? find_held_lock+0x2c/0x110 [ 46.129969] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.130541] ? lock_is_held_type+0x9f/0x120 [ 46.131078] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.131688] ? mtree_range_walk+0x632/0x900 [ 46.132237] ? mas_walk+0x5c7/0x7c0 [ 46.132709] do_vmi_munmap+0x1f1/0x2b0 [ 46.133204] mmap_region+0x1f9/0x2660 [ 46.133688] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.134209] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.134915] ? __pfx_lock_acquire+0x10/0x10 [ 46.135447] ? __pfx_mmap_region+0x10/0x10 [ 46.135978] ? security_mmap_addr+0x7d/0xa0 [ 46.136508] ? get_unmapped_area+0x1f5/0x3f0 [ 46.137059] do_mmap+0x854/0xf00 [ 46.137501] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.137999] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.138584] ksys_mmap_pgoff+0x3af/0x500 [ 46.139095] do_syscall_64+0x3f/0x90 [ 46.139575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.140225] RIP: 0033:0x7f849723ad82 [ 46.140678] 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 [ 46.142816] RSP: 002b:00007ffdd52132e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.143720] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f849723ad82 [ 46.144567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8496674000 [ 46.145412] RBP: 00007f8496674000 R08: 0000000000000009 R09: 0000000000001000 [ 46.146273] R10: 0000000000000812 R11: 0000000000000206 R12: 00005595a2bf3ec0 [ 46.147130] R13: 00007ffdd5213300 R14: 00007ffdd5213330 R15: 00007ffdd5213690 [ 46.147984] [ 46.148278] [ 46.148492] Allocated by task 211: [ 46.148916] kasan_save_stack+0x22/0x50 [ 46.149420] kasan_set_track+0x25/0x30 [ 46.149923] __kasan_slab_alloc+0x59/0x70 [ 46.150478] kmem_cache_alloc+0x16b/0x370 [ 46.151029] vm_area_dup+0x20/0x160 [ 46.151518] __split_vma+0x170/0x950 [ 46.151987] split_vma+0xc6/0x110 [ 46.152432] mprotect_fixup+0x8d2/0xb30 [ 46.152933] do_mprotect_pkey+0x87e/0xd40 [ 46.153463] __x64_sys_mprotect+0x78/0xc0 [ 46.154000] do_syscall_64+0x3f/0x90 [ 46.154490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.155148] [ 46.155364] Freed by task 211: [ 46.155767] kasan_save_stack+0x22/0x50 [ 46.156281] kasan_set_track+0x25/0x30 [ 46.156781] kasan_save_free_info+0x2b/0x50 [ 46.157329] __kasan_slab_free+0x10a/0x190 [ 46.157872] kmem_cache_free+0x10d/0x4d0 [ 46.158391] rcu_core+0x8c8/0x2860 [ 46.158839] __do_softirq+0x1b7/0x7d4 [ 46.159331] [ 46.159556] Last potentially related work creation: [ 46.160140] kasan_save_stack+0x22/0x50 [ 46.160648] __kasan_record_aux_stack+0x8e/0xa0 [ 46.161225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.161919] remove_vma+0x139/0x170 [ 46.162383] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.162949] do_vmi_munmap+0x1f1/0x2b0 [ 46.163433] __vm_munmap+0x138/0x3a0 [ 46.163906] __x64_sys_munmap+0x59/0x80 [ 46.164403] do_syscall_64+0x3f/0x90 [ 46.164877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.165521] [ 46.165737] The buggy address belongs to the object at ffff88800df0b658 [ 46.165737] which belongs to the cache vm_area_struct of size 168 [ 46.167224] The buggy address is located 88 bytes inside of [ 46.167224] freed 168-byte region [ffff88800df0b658, ffff88800df0b700) [ 46.168638] [ 46.168856] The buggy address belongs to the physical page: [ 46.169522] page:000000005b9517ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf0b [ 46.170649] memcg:ffff88800df52101 [ 46.171082] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.171747] page_type: 0xffffffff() [ 46.172206] raw: 0100000000000200 ffff88800879fc80 ffffea0000389ec0 dead000000000002 [ 46.173144] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df52101 [ 46.174066] page dumped because: kasan: bad access detected [ 46.174752] [ 46.174970] Memory state around the buggy address: [ 46.175559] ffff88800df0b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.176428] ffff88800df0b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 46.177312] >ffff88800df0b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.178193] ^ [ 46.178780] ffff88800df0b700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 46.179645] ffff88800df0b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 46.180487] ================================================================== [ 46.181422] Disabling lock debugging due to kernel taint [ 48.939705] BUG: Bad rss-counter state mm:00000000c6c849e7 type:MM_FILEPAGES val:33 [ 48.941167] BUG: Bad rss-counter state mm:00000000c6c849e7 type:MM_ANONPAGES val:22 [ 49.423663] BUG: Bad rss-counter state mm:00000000a059d287 type:MM_FILEPAGES val:33 [ 49.424657] BUG: Bad rss-counter state mm:00000000a059d287 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17514' (ECDSA) to the list of known hosts. 2023/06/19 18:42:17 fuzzer started 2023/06/19 18:42:17 dialing manager at localhost:44161 2023/06/19 18:42:17 checking machine... 2023/06/19 18:42:17 checking revisions... [ 50.172387] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:42:17 testing simple program... [ 50.219307] cgroup: Unknown subsys name 'net' [ 50.259256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:42:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000558d80852d00 RCX=0000000000000002 RDX=00000000000009ee RSI=000000000000000a RDI=0000558d80861202 RBP=00007ffec5472990 RSP=00007ffec5472928 R8 =0000558d80861202 R9 =00007ffa5b3f4be0 R10=0000000000200000 R11=0000000000000246 R12=00007ffa5ae42900 R13=00007ffec5472998 R14=00000000000009ee R15=0000000000000000 RIP=00007ffa5b391976 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffa5ae42900 00000000 00000000 GS =0000 0000000000000000 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=00007ffa5b3f7650 CR3=000000000b8b4000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=20646e6120676e6967676f6c20656c62 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000000000000000ffffffffffffffff XMM08=676e6967676f6c20656c62616e452023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880084400c0 RBX=ffff88801152e528 RCX=ffffffff812e00e5 RDX=1ffffffff0adb046 RSI=ffff88800cfef6b0 RDI=ffff88800d997938 RBP=0000000000000010 RSP=ffff88800d9979c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800cfef6a0 R13=0000000000000000 R14=ffff8880144ba768 R15=ffff8880144ba720 RIP=ffffffff818474b7 RFL=00000083 [--S---C] 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 00007f73bdff0900 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=00007f73bd47edb0 CR3=000000000c7f6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d6d501cbb2f253c500000000000ae988 XMM05=2f2c40ef873c85530000000000135b38 XMM06=dfcdbad4f1609c370000000000134058 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000