syzkaller login: [ 30.062516] BUG: Bad rss-counter state mm:000000009440a7c2 type:MM_FILEPAGES val:33 [ 30.063748] BUG: Bad rss-counter state mm:000000009440a7c2 type:MM_ANONPAGES val:22 [ 30.105884] ================================================================== [ 30.106932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.108006] Read of size 8 at addr ffff888015f07a50 by task sshd/219 [ 30.108920] [ 30.109195] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.110090] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.111092] Call Trace: [ 30.111412] [ 30.111704] dump_stack_lvl+0x91/0xf0 [ 30.112224] print_report+0xcc/0x620 [ 30.112708] ? __virt_addr_valid+0x102/0x340 [ 30.113287] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.113914] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.114544] kasan_report+0xbe/0xf0 [ 30.115034] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.115671] vma_interval_tree_remove+0xc75/0xec0 [ 30.116309] vma_prepare+0xc54/0x11a0 [ 30.116793] __split_vma+0x5af/0x950 [ 30.117279] ? __pfx___split_vma+0x10/0x10 [ 30.117810] ? find_held_lock+0x2c/0x110 [ 30.118345] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.118918] ? lock_is_held_type+0x9f/0x120 [ 30.119458] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.120084] ? mtree_range_walk+0x632/0x900 [ 30.120645] ? mas_walk+0x5c7/0x7c0 [ 30.121137] do_vmi_munmap+0x1f1/0x2b0 [ 30.121638] mmap_region+0x1f9/0x2660 [ 30.122127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.122651] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.123381] ? __pfx_lock_acquire+0x10/0x10 [ 30.123955] ? __pfx_mmap_region+0x10/0x10 [ 30.124496] ? security_mmap_addr+0x7d/0xa0 [ 30.125035] ? get_unmapped_area+0x1f5/0x3f0 [ 30.125595] do_mmap+0x854/0xf00 [ 30.126045] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.126550] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.127126] ksys_mmap_pgoff+0x3af/0x500 [ 30.127637] do_syscall_64+0x3f/0x90 [ 30.128128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.128779] RIP: 0033:0x7fe32fbdfd82 [ 30.129244] 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 [ 30.131412] RSP: 002b:00007ffe65055c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.132334] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe32fbdfd82 [ 30.133200] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe32f019000 [ 30.134055] RBP: 00007fe32f019000 R08: 0000000000000009 R09: 0000000000001000 [ 30.134915] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8b9bc2d90 [ 30.135780] R13: 00007ffe65055c20 R14: 00007ffe65055c50 R15: 00007ffe65055fb0 [ 30.136649] [ 30.136950] [ 30.137168] Allocated by task 212: [ 30.137602] kasan_save_stack+0x22/0x50 [ 30.138110] kasan_set_track+0x25/0x30 [ 30.138607] __kasan_slab_alloc+0x59/0x70 [ 30.139137] kmem_cache_alloc+0x16b/0x370 [ 30.139659] vm_area_dup+0x20/0x160 [ 30.140133] __split_vma+0x170/0x950 [ 30.140607] split_vma+0xc6/0x110 [ 30.141055] mprotect_fixup+0x8d2/0xb30 [ 30.141576] do_mprotect_pkey+0x87e/0xd40 [ 30.142106] __x64_sys_mprotect+0x78/0xc0 [ 30.142639] do_syscall_64+0x3f/0x90 [ 30.143116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.143762] [ 30.144001] Freed by task 13: [ 30.144392] kasan_save_stack+0x22/0x50 [ 30.144901] kasan_set_track+0x25/0x30 [ 30.145407] kasan_save_free_info+0x2b/0x50 [ 30.145943] __kasan_slab_free+0x10a/0x190 [ 30.146482] kmem_cache_free+0x10d/0x4d0 [ 30.147031] rcu_core+0x8c8/0x2860 [ 30.147481] __do_softirq+0x1b7/0x7d4 [ 30.147977] [ 30.148196] Last potentially related work creation: [ 30.148789] kasan_save_stack+0x22/0x50 [ 30.149299] __kasan_record_aux_stack+0x8e/0xa0 [ 30.149886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.150533] remove_vma+0x139/0x170 [ 30.150993] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.151557] do_vmi_munmap+0x1f1/0x2b0 [ 30.152064] __vm_munmap+0x138/0x3a0 [ 30.152542] __x64_sys_munmap+0x59/0x80 [ 30.153053] do_syscall_64+0x3f/0x90 [ 30.153537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.154188] [ 30.154407] The buggy address belongs to the object at ffff888015f079f8 [ 30.154407] which belongs to the cache vm_area_struct of size 168 [ 30.155900] The buggy address is located 88 bytes inside of [ 30.155900] freed 168-byte region [ffff888015f079f8, ffff888015f07aa0) [ 30.157325] [ 30.157545] The buggy address belongs to the physical page: [ 30.158207] page:00000000891addd6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f07 [ 30.159306] memcg:ffff88800e9d4301 [ 30.159739] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.160406] page_type: 0xffffffff() [ 30.160877] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.161814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9d4301 [ 30.162734] page dumped because: kasan: bad access detected [ 30.163402] [ 30.163621] Memory state around the buggy address: [ 30.164218] ffff888015f07900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.165088] ffff888015f07980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.165971] >ffff888015f07a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.166868] ^ [ 30.167600] ffff888015f07a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.168511] ffff888015f07b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.169380] ================================================================== [ 30.170346] Disabling lock debugging due to kernel taint [ 32.345332] BUG: Bad rss-counter state mm:000000004bc30520 type:MM_FILEPAGES val:33 [ 32.346461] BUG: Bad rss-counter state mm:000000004bc30520 type:MM_ANONPAGES val:22 [ 32.788265] BUG: Bad rss-counter state mm:00000000c5107e2b type:MM_FILEPAGES val:33 [ 32.789774] BUG: Bad rss-counter state mm:00000000c5107e2b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4392' (ECDSA) to the list of known hosts. 2023/06/19 17:27:40 fuzzer started 2023/06/19 17:27:40 dialing manager at localhost:44161 2023/06/19 17:27:40 checking machine... 2023/06/19 17:27:40 checking revisions... [ 33.507995] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:27:40 testing simple program... [ 33.556235] cgroup: Unknown subsys name 'net' [ 33.595750] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:27:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888016828000 RSI=ffffffff8198b510 RDI=0000000000000005 RBP=ffff8880192be2f0 RSP=ffff8880160e7c68 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000002 R14=ffff88800ef28b80 R15=ffff88801932efa8 RIP=ffffffff8198b510 RFL=00000293 [--S-A-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 00007f7867b64700 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=00007fc4a3e9fbb8 CR3=000000000e170000 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=2030343a37323a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a37323a3731203931 XMM08=755f6d65747379733d6a627573203539 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fde6b1f6000 RCX=0000000000000000 RDX=ffff8880197d51c0 RSI=00007fde6b1f6000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff888016c270f0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff888016c27238 R13=0000000000000000 R14=ffff8880197d51c0 R15=ffff88800ec275f0 RIP=ffffffff814c03b0 RFL=00000206 [-----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 00007fde6a664900 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=00007fde6a643020 CR3=000000000e942000 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=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