syzkaller login: [ 32.670530] BUG: Bad rss-counter state mm:00000000512613a8 type:MM_FILEPAGES val:33 [ 32.671724] BUG: Bad rss-counter state mm:00000000512613a8 type:MM_ANONPAGES val:22 [ 32.819926] ================================================================== [ 32.820815] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.821706] Read of size 8 at addr ffff888019f0b310 by task sshd/220 [ 32.822423] [ 32.822630] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.823627] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.824536] Call Trace: [ 32.824835] [ 32.825103] dump_stack_lvl+0x91/0xf0 [ 32.825598] print_report+0xcc/0x620 [ 32.826050] ? __virt_addr_valid+0x102/0x340 [ 32.826571] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.827148] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.827731] kasan_report+0xbe/0xf0 [ 32.828179] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.828767] vma_interval_tree_remove+0xc75/0xec0 [ 32.829332] vma_prepare+0xc54/0x11a0 [ 32.829819] __split_vma+0x5af/0x950 [ 32.830288] ? __pfx___split_vma+0x10/0x10 [ 32.830809] ? find_held_lock+0x2c/0x110 [ 32.831326] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.831897] ? lock_is_held_type+0x9f/0x120 [ 32.832431] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.833041] ? mtree_range_walk+0x632/0x900 [ 32.833610] ? mas_walk+0x5c7/0x7c0 [ 32.834085] do_vmi_munmap+0x1f1/0x2b0 [ 32.834579] mmap_region+0x1f9/0x2660 [ 32.835058] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.835577] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.836280] ? __pfx_lock_acquire+0x10/0x10 [ 32.836812] ? __pfx_mmap_region+0x10/0x10 [ 32.837344] ? security_mmap_addr+0x7d/0xa0 [ 32.837884] ? get_unmapped_area+0x1f5/0x3f0 [ 32.838447] do_mmap+0x854/0xf00 [ 32.838885] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.839377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.839936] ksys_mmap_pgoff+0x3af/0x500 [ 32.840441] do_syscall_64+0x3f/0x90 [ 32.840915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.841567] RIP: 0033:0x7fc1f2f01d82 [ 32.842022] 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 [ 32.844153] RSP: 002b:00007ffdc10b6638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.845139] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1f2f01d82 [ 32.846169] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1f233b000 [ 32.847005] RBP: 00007fc1f233b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.847843] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa97651f70 [ 32.848675] R13: 00007ffdc10b6650 R14: 00007ffdc10b6680 R15: 00007ffdc10b69e0 [ 32.849537] [ 32.849829] [ 32.850036] Allocated by task 213: [ 32.850454] kasan_save_stack+0x22/0x50 [ 32.850957] kasan_set_track+0x25/0x30 [ 32.851442] __kasan_slab_alloc+0x59/0x70 [ 32.851965] kmem_cache_alloc+0x16b/0x370 [ 32.852465] vm_area_dup+0x20/0x160 [ 32.852906] __split_vma+0x170/0x950 [ 32.853363] split_vma+0xc6/0x110 [ 32.853816] mprotect_fixup+0x8d2/0xb30 [ 32.854308] do_mprotect_pkey+0x87e/0xd40 [ 32.854816] __x64_sys_mprotect+0x78/0xc0 [ 32.855332] do_syscall_64+0x3f/0x90 [ 32.855796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.856427] [ 32.856639] Freed by task 213: [ 32.857019] kasan_save_stack+0x22/0x50 [ 32.857542] kasan_set_track+0x25/0x30 [ 32.858041] kasan_save_free_info+0x2b/0x50 [ 32.858560] __kasan_slab_free+0x10a/0x190 [ 32.859083] kmem_cache_free+0x10d/0x4d0 [ 32.859593] rcu_core+0x8c8/0x2860 [ 32.860023] __do_softirq+0x1b7/0x7d4 [ 32.860498] [ 32.860716] Last potentially related work creation: [ 32.861291] kasan_save_stack+0x22/0x50 [ 32.861809] __kasan_record_aux_stack+0x8e/0xa0 [ 32.862375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.862997] remove_vma+0x139/0x170 [ 32.863443] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.863983] do_vmi_munmap+0x1f1/0x2b0 [ 32.864487] __vm_munmap+0x138/0x3a0 [ 32.864946] __x64_sys_munmap+0x59/0x80 [ 32.865459] do_syscall_64+0x3f/0x90 [ 32.865932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.866570] [ 32.866783] The buggy address belongs to the object at ffff888019f0b2b8 [ 32.866783] which belongs to the cache vm_area_struct of size 168 [ 32.868233] The buggy address is located 88 bytes inside of [ 32.868233] freed 168-byte region [ffff888019f0b2b8, ffff888019f0b360) [ 32.869642] [ 32.869850] The buggy address belongs to the physical page: [ 32.870500] page:00000000ec8f7094 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f0b [ 32.871580] memcg:ffff888018525301 [ 32.871997] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.872638] page_type: 0xffffffff() [ 32.873084] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.874004] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018525301 [ 32.874885] page dumped because: kasan: bad access detected [ 32.875555] [ 32.875764] Memory state around the buggy address: [ 32.876335] ffff888019f0b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.877171] ffff888019f0b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.878018] >ffff888019f0b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.878866] ^ [ 32.879320] ffff888019f0b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.880159] ffff888019f0b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.881001] ================================================================== [ 32.881911] Disabling lock debugging due to kernel taint [ 35.066085] BUG: Bad rss-counter state mm:000000007a1d4b2f type:MM_FILEPAGES val:33 [ 35.067085] BUG: Bad rss-counter state mm:000000007a1d4b2f type:MM_ANONPAGES val:22 [ 35.495722] BUG: Bad rss-counter state mm:00000000afa107c5 type:MM_FILEPAGES val:33 [ 35.496886] BUG: Bad rss-counter state mm:00000000afa107c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42050' (ECDSA) to the list of known hosts. 2023/06/19 12:06:18 fuzzer started 2023/06/19 12:06:18 dialing manager at localhost:44161 2023/06/19 12:06:18 checking machine... 2023/06/19 12:06:18 checking revisions... [ 36.204178] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:06:19 testing simple program... [ 36.255407] cgroup: Unknown subsys name 'net' [ 36.311538] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:06:16 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000a233e20c RCX=ffff88806c5f1060 RDX=0000000000000007 RSI=0000000000000002 RDI=00000000aad9e706 RBP=ffff888010055500 RSP=ffff888008d7fa20 R8 =0000000055a60ca5 R9 =ffff888008d7f990 R10=0000000000038001 R11=0000000000000128 R12=0000000000000000 R13=0000000000000000 R14=ffff888008d7fa88 R15=0000000000000007 RIP=ffffffff82270f2d 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 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=00007fb5e57c40b0 CR3=00000000095e8000 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=36303a3231203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363835 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff8613da01 RDX=0000000000000000 RSI=ffffffff81847452 RDI=ffff888015fffab4 RBP=0000000000000000 RSP=ffff888015fff9d0 R8 =ffffffff8613daa0 R9 =ffff888015fffa20 R10=0000000000038001 R11=0000000000021e78 R12=ffff888015fffaa8 R13=0000000000000000 R14=ffff88800cf28000 R15=ffff888016bb7ab0 RIP=ffffffff813ad521 RFL=00000282 [--S----] 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 00007fb5e520c900 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=00007fb31d5c5000 CR3=0000000016dd2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000