syzkaller login: [ 29.090309] BUG: Bad rss-counter state mm:000000009e39d00f type:MM_FILEPAGES val:33 [ 29.091543] BUG: Bad rss-counter state mm:000000009e39d00f type:MM_ANONPAGES val:22 [ 29.184809] ================================================================== [ 29.185727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.186660] Read of size 8 at addr ffff8880182a5b38 by task sshd/220 [ 29.187522] [ 29.187738] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.188596] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.189562] Call Trace: [ 29.189877] [ 29.190165] dump_stack_lvl+0x91/0xf0 [ 29.190651] print_report+0xcc/0x620 [ 29.191132] ? __virt_addr_valid+0x102/0x340 [ 29.191710] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.192327] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.192936] kasan_report+0xbe/0xf0 [ 29.193409] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.194030] vma_interval_tree_remove+0xc75/0xec0 [ 29.194625] vma_prepare+0xc54/0x11a0 [ 29.195109] __split_vma+0x5af/0x950 [ 29.195585] ? __pfx___split_vma+0x10/0x10 [ 29.196120] ? find_held_lock+0x2c/0x110 [ 29.196641] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.197201] ? lock_is_held_type+0x9f/0x120 [ 29.197730] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.198337] ? mtree_range_walk+0x632/0x900 [ 29.198878] ? mas_walk+0x5c7/0x7c0 [ 29.199354] do_vmi_munmap+0x1f1/0x2b0 [ 29.199850] mmap_region+0x1f9/0x2660 [ 29.200332] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.200842] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.201555] ? __pfx_lock_acquire+0x10/0x10 [ 29.202083] ? __pfx_mmap_region+0x10/0x10 [ 29.202604] ? security_mmap_addr+0x7d/0xa0 [ 29.203140] ? get_unmapped_area+0x1f5/0x3f0 [ 29.203704] do_mmap+0x854/0xf00 [ 29.204144] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.204633] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.205201] ksys_mmap_pgoff+0x3af/0x500 [ 29.205704] do_syscall_64+0x3f/0x90 [ 29.206178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.206824] RIP: 0033:0x7f46a0407d82 [ 29.207280] 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 [ 29.209416] RSP: 002b:00007ffd8ab61018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.210321] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46a0407d82 [ 29.211161] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f469f841000 [ 29.212033] RBP: 00007f469f841000 R08: 0000000000000009 R09: 0000000000001000 [ 29.212874] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654af27af60 [ 29.213716] R13: 00007ffd8ab61030 R14: 00007ffd8ab61060 R15: 00007ffd8ab613c0 [ 29.214569] [ 29.214863] [ 29.215080] Allocated by task 212: [ 29.215518] kasan_save_stack+0x22/0x50 [ 29.216015] kasan_set_track+0x25/0x30 [ 29.216503] __kasan_slab_alloc+0x59/0x70 [ 29.217017] kmem_cache_alloc+0x16b/0x370 [ 29.217533] vm_area_dup+0x20/0x160 [ 29.217983] __split_vma+0x170/0x950 [ 29.218519] split_vma+0xc6/0x110 [ 29.218971] mprotect_fixup+0x8d2/0xb30 [ 29.219483] do_mprotect_pkey+0x87e/0xd40 [ 29.220001] __x64_sys_mprotect+0x78/0xc0 [ 29.220528] do_syscall_64+0x3f/0x90 [ 29.221000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.221646] [ 29.221857] Freed by task 212: [ 29.222245] kasan_save_stack+0x22/0x50 [ 29.222750] kasan_set_track+0x25/0x30 [ 29.223240] kasan_save_free_info+0x2b/0x50 [ 29.223781] __kasan_slab_free+0x10a/0x190 [ 29.224313] kmem_cache_free+0x10d/0x4d0 [ 29.224819] rcu_core+0x8c8/0x2860 [ 29.225269] __do_softirq+0x1b7/0x7d4 [ 29.225742] [ 29.225957] Last potentially related work creation: [ 29.226543] kasan_save_stack+0x22/0x50 [ 29.227046] __kasan_record_aux_stack+0x8e/0xa0 [ 29.227624] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.228278] remove_vma+0x139/0x170 [ 29.228729] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.229286] do_vmi_munmap+0x1f1/0x2b0 [ 29.229767] __vm_munmap+0x138/0x3a0 [ 29.230234] __x64_sys_munmap+0x59/0x80 [ 29.230725] do_syscall_64+0x3f/0x90 [ 29.231204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.231852] [ 29.232065] The buggy address belongs to the object at ffff8880182a5ae0 [ 29.232065] which belongs to the cache vm_area_struct of size 168 [ 29.233549] The buggy address is located 88 bytes inside of [ 29.233549] freed 168-byte region [ffff8880182a5ae0, ffff8880182a5b88) [ 29.234933] [ 29.235147] The buggy address belongs to the physical page: [ 29.235814] page:000000000754dd57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182a5 [ 29.236893] memcg:ffff8880182a6001 [ 29.237320] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.237962] page_type: 0xffffffff() [ 29.238407] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.239315] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182a6001 [ 29.240219] page dumped because: kasan: bad access detected [ 29.240905] [ 29.241121] Memory state around the buggy address: [ 29.241697] ffff8880182a5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.242542] ffff8880182a5a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 29.243395] >ffff8880182a5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.244245] ^ [ 29.244857] ffff8880182a5b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.245717] ffff8880182a5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.246568] ================================================================== [ 29.247571] Disabling lock debugging due to kernel taint [ 31.208982] BUG: Bad rss-counter state mm:0000000041e08946 type:MM_FILEPAGES val:33 [ 31.209924] BUG: Bad rss-counter state mm:0000000041e08946 type:MM_ANONPAGES val:22 [ 31.684987] BUG: Bad rss-counter state mm:00000000d8f427bc type:MM_FILEPAGES val:33 [ 31.685982] BUG: Bad rss-counter state mm:00000000d8f427bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6814' (ECDSA) to the list of known hosts. 2023/06/19 11:47:00 fuzzer started 2023/06/19 11:47:00 dialing manager at localhost:44161 2023/06/19 11:47:00 checking machine... 2023/06/19 11:47:00 checking revisions... [ 32.462600] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:47:00 testing simple program... [ 32.512708] cgroup: Unknown subsys name 'net' [ 32.584672] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:46:59 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=ffff88806ce09ff8 RCX=ffffffff8609fb01 RDX=ffff88806ce0a000 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffff88806ce02000 RSP=ffff88806ce09a28 R8 =ffffffff8609fb08 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ff8 R15=ffff88806ce09a98 RIP=ffffffff81131cd2 RFL=00000287 [--S--PC] 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 00007f83e3c07900 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=00007ffc89bc9000 CR3=000000000e826000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f68bda09a80 CR3=000000000c50a000 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=2f9b24e2ae4c82b1ea4033962dd6f559 XMM02=2c67c8bc2e329bc30000000000120100 XMM03=fb795ef6d65770560000000000124078 XMM04=5707c09f50688db600000000000ae988 XMM05=768857279ebbf1d00000000000135158 XMM06=4fda316b135da52b00000000001341f8 XMM07=e042d86d42eb936e00000000001249e0 XMM08=d05f840025892fa60000000000120160 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000