syzkaller login: [ 35.077288] BUG: Bad rss-counter state mm:0000000001701bf4 type:MM_FILEPAGES val:33 [ 35.078333] BUG: Bad rss-counter state mm:0000000001701bf4 type:MM_ANONPAGES val:22 [ 35.234185] ================================================================== [ 35.235143] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.236091] Read of size 8 at addr ffff888014705058 by task sshd/220 [ 35.236852] [ 35.237069] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.238093] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.239068] Call Trace: [ 35.239386] [ 35.239690] dump_stack_lvl+0x91/0xf0 [ 35.240175] print_report+0xcc/0x620 [ 35.240661] ? __virt_addr_valid+0x102/0x340 [ 35.241207] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.241817] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.242442] kasan_report+0xbe/0xf0 [ 35.242913] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.243541] vma_interval_tree_remove+0xc75/0xec0 [ 35.244142] vma_prepare+0xc54/0x11a0 [ 35.244623] __split_vma+0x5af/0x950 [ 35.245098] ? __pfx___split_vma+0x10/0x10 [ 35.245631] ? find_held_lock+0x2c/0x110 [ 35.246148] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.246733] ? lock_is_held_type+0x9f/0x120 [ 35.247273] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.247886] ? mtree_range_walk+0x632/0x900 [ 35.248441] ? mas_walk+0x5c7/0x7c0 [ 35.248924] do_vmi_munmap+0x1f1/0x2b0 [ 35.249421] mmap_region+0x1f9/0x2660 [ 35.249907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.250439] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.251162] ? __pfx_lock_acquire+0x10/0x10 [ 35.251696] ? __pfx_mmap_region+0x10/0x10 [ 35.252232] ? security_mmap_addr+0x7d/0xa0 [ 35.252763] ? get_unmapped_area+0x1f5/0x3f0 [ 35.253310] do_mmap+0x854/0xf00 [ 35.253746] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.254243] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.254816] ksys_mmap_pgoff+0x3af/0x500 [ 35.255329] do_syscall_64+0x3f/0x90 [ 35.255806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.256446] RIP: 0033:0x7f9fb4167d82 [ 35.256909] 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 [ 35.259025] RSP: 002b:00007ffec74278f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.259922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fb4167d82 [ 35.260770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fb35a1000 [ 35.261605] RBP: 00007f9fb35a1000 R08: 0000000000000009 R09: 0000000000001000 [ 35.262506] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607a389fec0 [ 35.263387] R13: 00007ffec7427910 R14: 00007ffec7427940 R15: 00007ffec7427ca0 [ 35.264292] [ 35.264582] [ 35.264799] Allocated by task 213: [ 35.265244] kasan_save_stack+0x22/0x50 [ 35.265761] kasan_set_track+0x25/0x30 [ 35.266281] __kasan_slab_alloc+0x59/0x70 [ 35.266823] kmem_cache_alloc+0x16b/0x370 [ 35.267345] vm_area_dup+0x20/0x160 [ 35.267814] __split_vma+0x170/0x950 [ 35.268297] split_vma+0xc6/0x110 [ 35.268750] mprotect_fixup+0x8d2/0xb30 [ 35.269256] do_mprotect_pkey+0x87e/0xd40 [ 35.269779] __x64_sys_mprotect+0x78/0xc0 [ 35.270298] do_syscall_64+0x3f/0x90 [ 35.270789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.271455] [ 35.271670] Freed by task 19: [ 35.272052] kasan_save_stack+0x22/0x50 [ 35.272554] kasan_set_track+0x25/0x30 [ 35.273067] kasan_save_free_info+0x2b/0x50 [ 35.273611] __kasan_slab_free+0x10a/0x190 [ 35.274160] kmem_cache_free+0x10d/0x4d0 [ 35.274684] rcu_core+0x8c8/0x2860 [ 35.275142] __do_softirq+0x1b7/0x7d4 [ 35.275618] [ 35.275839] Last potentially related work creation: [ 35.276444] kasan_save_stack+0x22/0x50 [ 35.276969] __kasan_record_aux_stack+0x8e/0xa0 [ 35.277544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.278217] remove_vma+0x139/0x170 [ 35.278797] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.279378] do_vmi_munmap+0x1f1/0x2b0 [ 35.279877] __vm_munmap+0x138/0x3a0 [ 35.280367] __x64_sys_munmap+0x59/0x80 [ 35.280864] do_syscall_64+0x3f/0x90 [ 35.281338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.281973] [ 35.282192] The buggy address belongs to the object at ffff888014705000 [ 35.282192] which belongs to the cache vm_area_struct of size 168 [ 35.283674] The buggy address is located 88 bytes inside of [ 35.283674] freed 168-byte region [ffff888014705000, ffff8880147050a8) [ 35.285064] [ 35.285283] The buggy address belongs to the physical page: [ 35.285937] page:00000000fcbc1ee0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14705 [ 35.287040] memcg:ffff888018d68e01 [ 35.287473] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.288170] page_type: 0xffffffff() [ 35.288621] raw: 0100000000000200 ffff88800879fc80 ffffea000051c040 0000000000000003 [ 35.289535] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d68e01 [ 35.290443] page dumped because: kasan: bad access detected [ 35.291097] [ 35.291313] Memory state around the buggy address: [ 35.291900] ffff888014704f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.292751] ffff888014704f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.293590] >ffff888014705000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.294444] ^ [ 35.295177] ffff888014705080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 35.296032] ffff888014705100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.296883] ================================================================== [ 35.297876] Disabling lock debugging due to kernel taint [ 37.960634] BUG: Bad rss-counter state mm:0000000065b147ca type:MM_FILEPAGES val:33 [ 37.962098] BUG: Bad rss-counter state mm:0000000065b147ca type:MM_ANONPAGES val:22 [ 38.483267] BUG: Bad rss-counter state mm:00000000c8f5a946 type:MM_FILEPAGES val:33 [ 38.484358] BUG: Bad rss-counter state mm:00000000c8f5a946 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10452' (ECDSA) to the list of known hosts. 2023/06/20 01:34:23 fuzzer started 2023/06/20 01:34:23 dialing manager at localhost:44161 2023/06/20 01:34:23 checking machine... 2023/06/20 01:34:23 checking revisions... [ 39.202176] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:34:23 testing simple program... [ 39.258013] cgroup: Unknown subsys name 'net' [ 39.320308] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:34:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800eb88000 RCX=ffff88800844f780 RDX=ffffea00003ae200 RSI=ffff88800d9e95f0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888018cffc98 R8 =ffff88800eb88ab0 R9 =0000000000000000 R10=ffffea0000367a40 R11=00000000800d000b R12=dffffc0000000000 R13=ffff888018cffcd8 R14=ffff88800844f780 R15=ffff88800d9e95f0 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007f57bb173900 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=00007f57bb728650 CR3=00000000094a6000 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=0000000080010002 RBX=ffff88806cf2c250 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=ffffffff844d4c46 RDI=0000000000000006 RBP=ffff88806cf2c250 RSP=ffff88806cf09dd8 R8 =0000000000000006 R9 =ffff88806cf2c250 R10=ffff88806cf2c250 R11=ffff88806cf09ff8 R12=ffff88806cf2b940 R13=0000000000000007 R14=ffff88806cf2b9c0 R15=dffffc0000000000 RIP=ffffffff84532a40 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 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=00007f331ebf4920 CR3=0000000014556000 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=cc92cd6095ac2caa8540e93bfe75d3ba XMM02=000000000011d030eff9b2d0a8fce9cb XMM03=000000000011d1002c67c8bc2e329bc3 XMM04=f2017cb9dcc4bef800000000000ae988 XMM05=19e9129bd510f2350000000000134080 XMM06=124297480146606a0000000000132ee8 XMM07=e042d86d42eb936e0000000000124528 XMM08=2cbd2b1f5843ee68000000000011d100 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000