syzkaller login: [ 31.325596] BUG: Bad rss-counter state mm:000000002cc8d0c2 type:MM_FILEPAGES val:33 [ 31.327006] BUG: Bad rss-counter state mm:000000002cc8d0c2 type:MM_ANONPAGES val:22 [ 31.483035] ================================================================== [ 31.484181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.485312] Read of size 8 at addr ffff88800dd594e0 by task sshd/221 [ 31.486420] [ 31.486706] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.487764] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.488933] Call Trace: [ 31.489264] [ 31.489560] dump_stack_lvl+0x91/0xf0 [ 31.490065] print_report+0xcc/0x620 [ 31.490589] ? __virt_addr_valid+0x102/0x340 [ 31.491166] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.491795] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.492445] kasan_report+0xbe/0xf0 [ 31.492929] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.493577] vma_interval_tree_remove+0xc75/0xec0 [ 31.494207] vma_prepare+0xc54/0x11a0 [ 31.494714] __split_vma+0x5af/0x950 [ 31.495198] ? __pfx___split_vma+0x10/0x10 [ 31.495745] ? find_held_lock+0x2c/0x110 [ 31.496289] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.496872] ? lock_is_held_type+0x9f/0x120 [ 31.497432] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.498055] ? mtree_range_walk+0x632/0x900 [ 31.498655] ? mas_walk+0x5c7/0x7c0 [ 31.499151] do_vmi_munmap+0x1f1/0x2b0 [ 31.499667] mmap_region+0x1f9/0x2660 [ 31.500175] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.500714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.501457] ? __pfx_lock_acquire+0x10/0x10 [ 31.502009] ? __pfx_mmap_region+0x10/0x10 [ 31.502574] ? security_mmap_addr+0x7d/0xa0 [ 31.503128] ? get_unmapped_area+0x1f5/0x3f0 [ 31.503701] do_mmap+0x854/0xf00 [ 31.504162] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.504679] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.505257] ksys_mmap_pgoff+0x3af/0x500 [ 31.505788] do_syscall_64+0x3f/0x90 [ 31.506283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.506973] RIP: 0033:0x7fe1113b5d82 [ 31.507447] 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 [ 31.509635] RSP: 002b:00007ffec14398e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.510599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1113b5d82 [ 31.511487] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1107ef000 [ 31.512359] RBP: 00007fe1107ef000 R08: 0000000000000009 R09: 0000000000001000 [ 31.513241] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6b510fec0 [ 31.514109] R13: 00007ffec1439900 R14: 00007ffec1439930 R15: 00007ffec1439c90 [ 31.515016] [ 31.515328] [ 31.515551] Allocated by task 214: [ 31.516005] kasan_save_stack+0x22/0x50 [ 31.516530] kasan_set_track+0x25/0x30 [ 31.517036] __kasan_slab_alloc+0x59/0x70 [ 31.517575] kmem_cache_alloc+0x16b/0x370 [ 31.518108] vm_area_dup+0x20/0x160 [ 31.518587] __split_vma+0x170/0x950 [ 31.519072] split_vma+0xc6/0x110 [ 31.519529] mprotect_fixup+0x8d2/0xb30 [ 31.520043] do_mprotect_pkey+0x87e/0xd40 [ 31.520584] __x64_sys_mprotect+0x78/0xc0 [ 31.521120] do_syscall_64+0x3f/0x90 [ 31.521606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.522271] [ 31.522516] Freed by task 214: [ 31.522928] kasan_save_stack+0x22/0x50 [ 31.523451] kasan_set_track+0x25/0x30 [ 31.523960] kasan_save_free_info+0x2b/0x50 [ 31.524511] __kasan_slab_free+0x10a/0x190 [ 31.525066] kmem_cache_free+0x10d/0x4d0 [ 31.525583] rcu_core+0x8c8/0x2860 [ 31.526045] __do_softirq+0x1b7/0x7d4 [ 31.526554] [ 31.526786] Last potentially related work creation: [ 31.527402] kasan_save_stack+0x22/0x50 [ 31.527920] __kasan_record_aux_stack+0x8e/0xa0 [ 31.528516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.529180] remove_vma+0x139/0x170 [ 31.529646] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.530222] do_vmi_munmap+0x1f1/0x2b0 [ 31.530718] __vm_munmap+0x138/0x3a0 [ 31.531203] __x64_sys_munmap+0x59/0x80 [ 31.531723] do_syscall_64+0x3f/0x90 [ 31.532220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.532875] [ 31.533108] The buggy address belongs to the object at ffff88800dd59488 [ 31.533108] which belongs to the cache vm_area_struct of size 168 [ 31.534647] The buggy address is located 88 bytes inside of [ 31.534647] freed 168-byte region [ffff88800dd59488, ffff88800dd59530) [ 31.536084] [ 31.536304] The buggy address belongs to the physical page: [ 31.536981] page:00000000114dbf48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd59 [ 31.538101] memcg:ffff88800db9ae01 [ 31.538556] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.539217] page_type: 0xffffffff() [ 31.539680] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.540643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db9ae01 [ 31.541578] page dumped because: kasan: bad access detected [ 31.542264] [ 31.542483] Memory state around the buggy address: [ 31.543108] ffff88800dd59380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.544009] ffff88800dd59400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.544896] >ffff88800dd59480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.545771] ^ [ 31.546549] ffff88800dd59500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.547440] ffff88800dd59580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.548311] ================================================================== [ 31.549626] Disabling lock debugging due to kernel taint [ 33.567054] BUG: Bad rss-counter state mm:00000000c65edf61 type:MM_FILEPAGES val:32 [ 33.567991] BUG: Bad rss-counter state mm:00000000c65edf61 type:MM_ANONPAGES val:22 [ 34.018999] BUG: Bad rss-counter state mm:000000006eabec3d type:MM_FILEPAGES val:31 [ 34.020163] BUG: Bad rss-counter state mm:000000006eabec3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60275' (ECDSA) to the list of known hosts. 2023/06/20 07:58:37 fuzzer started 2023/06/20 07:58:37 dialing manager at localhost:44161 2023/06/20 07:58:37 checking machine... 2023/06/20 07:58:37 checking revisions... [ 34.663925] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:58:38 testing simple program... [ 34.714847] cgroup: Unknown subsys name 'net' [ 34.753973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:58:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019e30f60 RCX=ffffffff818e99c3 RDX=ffff88801645b680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016eafe00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888019e30f00 R13=ffff88801bc378c0 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff814c07e0 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 00007f82e5624900 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=00007f82e5bdc0b0 CR3=000000001a1be000 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=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 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=ffff888008c58400 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=00007f39d3133e70 CR3=000000000dbe0000 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=bf506ddb6ae10485c249195d633fbde8 XMM02=000000000011fd30eff9b2d0a8fce9cb XMM03=000000000011fe002c67c8bc2e329bc3 XMM04=af89783bdc90550700000000000ae988 XMM05=2c2fb3886921d5a90000000000134348 XMM06=c291bd5c70af25b90000000000133fd0 XMM07=e042d86d42eb936e00000000001247c0 XMM08=051fe9b0fa34ff21000000000011fe00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000