syzkaller login: [ 31.104394] BUG: Bad rss-counter state mm:0000000070be9206 type:MM_FILEPAGES val:33 [ 31.105860] BUG: Bad rss-counter state mm:0000000070be9206 type:MM_ANONPAGES val:22 [ 31.280621] ================================================================== [ 31.281811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.282778] Read of size 8 at addr ffff888015efe4e0 by task sshd/221 [ 31.283650] [ 31.283868] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.284721] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.285732] Call Trace: [ 31.286050] [ 31.286336] dump_stack_lvl+0x91/0xf0 [ 31.286825] print_report+0xcc/0x620 [ 31.287314] ? __virt_addr_valid+0x102/0x340 [ 31.287873] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288527] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289219] kasan_report+0xbe/0xf0 [ 31.289725] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.290396] vma_interval_tree_remove+0xc75/0xec0 [ 31.291111] vma_prepare+0xc54/0x11a0 [ 31.291674] __split_vma+0x5af/0x950 [ 31.292253] ? __pfx___split_vma+0x10/0x10 [ 31.292838] ? find_held_lock+0x2c/0x110 [ 31.293454] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.294124] ? lock_is_held_type+0x9f/0x120 [ 31.294770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.295474] ? mtree_range_walk+0x632/0x900 [ 31.296092] ? mas_walk+0x5c7/0x7c0 [ 31.296588] do_vmi_munmap+0x1f1/0x2b0 [ 31.297113] mmap_region+0x1f9/0x2660 [ 31.297604] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.298136] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.298874] ? __pfx_lock_acquire+0x10/0x10 [ 31.299420] ? __pfx_mmap_region+0x10/0x10 [ 31.299964] ? security_mmap_addr+0x7d/0xa0 [ 31.300524] ? get_unmapped_area+0x1f5/0x3f0 [ 31.301157] do_mmap+0x854/0xf00 [ 31.301601] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.302097] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.302699] ksys_mmap_pgoff+0x3af/0x500 [ 31.303182] do_syscall_64+0x3f/0x90 [ 31.303642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304260] RIP: 0033:0x7f19b79d7d82 [ 31.304698] 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 [ 31.306709] RSP: 002b:00007ffcbf054418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.307566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19b79d7d82 [ 31.308369] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19b6e11000 [ 31.309177] RBP: 00007f19b6e11000 R08: 0000000000000009 R09: 0000000000001000 [ 31.310021] R10: 0000000000000812 R11: 0000000000000206 R12: 00005556c9d6fec0 [ 31.310870] R13: 00007ffcbf054430 R14: 00007ffcbf054460 R15: 00007ffcbf0547c0 [ 31.311711] [ 31.312003] [ 31.312219] Allocated by task 214: [ 31.312638] kasan_save_stack+0x22/0x50 [ 31.313150] kasan_set_track+0x25/0x30 [ 31.313635] __kasan_slab_alloc+0x59/0x70 [ 31.314158] kmem_cache_alloc+0x16b/0x370 [ 31.314662] vm_area_dup+0x20/0x160 [ 31.315119] __split_vma+0x170/0x950 [ 31.315579] split_vma+0xc6/0x110 [ 31.316019] mprotect_fixup+0x8d2/0xb30 [ 31.316528] do_mprotect_pkey+0x87e/0xd40 [ 31.317050] __x64_sys_mprotect+0x78/0xc0 [ 31.317567] do_syscall_64+0x3f/0x90 [ 31.318041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.318679] [ 31.318887] Freed by task 214: [ 31.319273] kasan_save_stack+0x22/0x50 [ 31.319777] kasan_set_track+0x25/0x30 [ 31.320268] kasan_save_free_info+0x2b/0x50 [ 31.320789] __kasan_slab_free+0x10a/0x190 [ 31.321320] kmem_cache_free+0x10d/0x4d0 [ 31.321827] rcu_core+0x8c8/0x2860 [ 31.322271] __do_softirq+0x1b7/0x7d4 [ 31.322742] [ 31.322953] Last potentially related work creation: [ 31.323529] kasan_save_stack+0x22/0x50 [ 31.324028] __kasan_record_aux_stack+0x8e/0xa0 [ 31.324598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.325258] remove_vma+0x139/0x170 [ 31.325732] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.326332] do_vmi_munmap+0x1f1/0x2b0 [ 31.326846] __vm_munmap+0x138/0x3a0 [ 31.327334] __x64_sys_munmap+0x59/0x80 [ 31.327865] do_syscall_64+0x3f/0x90 [ 31.328360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.329043] [ 31.329270] The buggy address belongs to the object at ffff888015efe488 [ 31.329270] which belongs to the cache vm_area_struct of size 168 [ 31.330819] The buggy address is located 88 bytes inside of [ 31.330819] freed 168-byte region [ffff888015efe488, ffff888015efe530) [ 31.332262] [ 31.332479] The buggy address belongs to the physical page: [ 31.333151] page:00000000a10c7bac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15efe [ 31.334249] memcg:ffff88800e577d01 [ 31.334672] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.335323] page_type: 0xffffffff() [ 31.335773] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.336699] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e577d01 [ 31.337622] page dumped because: kasan: bad access detected [ 31.338282] [ 31.338497] Memory state around the buggy address: [ 31.339072] ffff888015efe380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.339927] ffff888015efe400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.340858] >ffff888015efe480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.341784] ^ [ 31.342647] ffff888015efe500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.343597] ffff888015efe580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.344399] ================================================================== [ 31.345390] Disabling lock debugging due to kernel taint [ 33.084320] BUG: Bad rss-counter state mm:000000003a03271d type:MM_FILEPAGES val:33 [ 33.085615] BUG: Bad rss-counter state mm:000000003a03271d type:MM_ANONPAGES val:22 [ 33.550283] BUG: Bad rss-counter state mm:0000000054d4f35c type:MM_FILEPAGES val:33 [ 33.551546] BUG: Bad rss-counter state mm:0000000054d4f35c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20086' (ECDSA) to the list of known hosts. 2023/06/20 21:37:50 fuzzer started 2023/06/20 21:37:50 dialing manager at localhost:36067 2023/06/20 21:37:50 checking machine... 2023/06/20 21:37:50 checking revisions... [ 34.200833] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:37:50 testing simple program... [ 34.246112] cgroup: Unknown subsys name 'net' [ 34.324807] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:37:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801cc89dc0 RCX=ffffffff812e0135 RDX=1ffff11001e3f47a RSI=0000000000000000 RDI=ffff88800f1fa3d0 RBP=ffff88800f1fa390 RSP=ffff8880146b7918 R8 =0000000000000001 R9 =ffffed10028d6f11 R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000287 R13=ffffea0000732240 R14=ffffffff8366b8df R15=ffff88800dd67c80 RIP=ffffffff845195a1 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 00007f232c85d900 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=00007f232bc98150 CR3=000000000e70a000 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=ebc18b02d394e68f27428a0b38ce9fe8 XMM02=eff9b2d0a8fce9cb000000000011aa00 XMM03=2c67c8bc2e329bc3000000000011ab28 XMM04=3f77d11fce32de8c00000000000ae988 XMM05=9f756258aeff18e60000000000132bc8 XMM06=c291bd5c70af25b900000000001319b8 XMM07=fb795ef6d65770560000000000121cf0 XMM08=2c67c8bc2e329bc3000000000011ab28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000559bc3ce8eb1 RBX=0000559bc3ce8eb0 RCX=0000000000000a23 RDX=0000000000000000 RSI=0000000000000a23 RDI=0000559bc3d06fb0 RBP=0000000000000002 RSP=00007ffc439e9d70 R8 =0000559bc3d157e9 R9 =00007f0ad2ec0be0 R10=0000000000000100 R11=0000000000000246 R12=0000559bc3d06ed0 R13=00007ffc439e9d78 R14=00007f0ad28e9b22 R15=00007f0ad290e710 RIP=00007f0ad343b378 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 00007f0ad290e900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc439e4000 CR3=0000000009884000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=0000000000ff00ff0000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=756f7267207972616d69727020656874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000000000000000ffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000