syzkaller login: [ 39.006621] BUG: Bad rss-counter state mm:00000000e9bc29ce type:MM_FILEPAGES val:33 [ 39.007819] BUG: Bad rss-counter state mm:00000000e9bc29ce type:MM_ANONPAGES val:22 [ 39.045332] ================================================================== [ 39.046342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.047274] Read of size 8 at addr ffff88801472cc20 by task sshd/218 [ 39.048122] [ 39.048342] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.049209] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.050202] Call Trace: [ 39.050516] [ 39.050806] dump_stack_lvl+0x91/0xf0 [ 39.051311] print_report+0xcc/0x620 [ 39.051799] ? __virt_addr_valid+0x102/0x340 [ 39.052352] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.052959] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.053591] kasan_report+0xbe/0xf0 [ 39.054060] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.054675] vma_interval_tree_remove+0xc75/0xec0 [ 39.055285] vma_prepare+0xc54/0x11a0 [ 39.055768] __split_vma+0x5af/0x950 [ 39.056236] ? __pfx___split_vma+0x10/0x10 [ 39.056763] ? find_held_lock+0x2c/0x110 [ 39.057274] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.057855] ? lock_is_held_type+0x9f/0x120 [ 39.058393] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.058990] ? mtree_range_walk+0x632/0x900 [ 39.059541] ? mas_walk+0x5c7/0x7c0 [ 39.060010] do_vmi_munmap+0x1f1/0x2b0 [ 39.060499] mmap_region+0x1f9/0x2660 [ 39.060977] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.061493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.062203] ? __pfx_lock_acquire+0x10/0x10 [ 39.062735] ? __pfx_mmap_region+0x10/0x10 [ 39.063261] ? security_mmap_addr+0x7d/0xa0 [ 39.063796] ? get_unmapped_area+0x1f5/0x3f0 [ 39.064350] do_mmap+0x854/0xf00 [ 39.064787] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.065284] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.065858] ksys_mmap_pgoff+0x3af/0x500 [ 39.066362] do_syscall_64+0x3f/0x90 [ 39.066841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.067479] RIP: 0033:0x7fceae75ed82 [ 39.067930] 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 [ 39.070032] RSP: 002b:00007fff2ad115c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.070924] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fceae75ed82 [ 39.071764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fceadb98000 [ 39.072603] RBP: 00007fceadb98000 R08: 0000000000000009 R09: 0000000000001000 [ 39.073433] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da6d2f9f70 [ 39.074295] R13: 00007fff2ad115e0 R14: 00007fff2ad11610 R15: 00007fff2ad11970 [ 39.075145] [ 39.075432] [ 39.075647] Allocated by task 211: [ 39.076073] kasan_save_stack+0x22/0x50 [ 39.076575] kasan_set_track+0x25/0x30 [ 39.077064] __kasan_slab_alloc+0x59/0x70 [ 39.077592] kmem_cache_alloc+0x16b/0x370 [ 39.078109] vm_area_dup+0x20/0x160 [ 39.078563] __split_vma+0x170/0x950 [ 39.079021] split_vma+0xc6/0x110 [ 39.079455] mprotect_fixup+0x8d2/0xb30 [ 39.079947] do_mprotect_pkey+0x87e/0xd40 [ 39.080460] __x64_sys_mprotect+0x78/0xc0 [ 39.080978] do_syscall_64+0x3f/0x90 [ 39.081444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.082094] [ 39.082312] Freed by task 211: [ 39.082703] kasan_save_stack+0x22/0x50 [ 39.083201] kasan_set_track+0x25/0x30 [ 39.083691] kasan_save_free_info+0x2b/0x50 [ 39.084219] __kasan_slab_free+0x10a/0x190 [ 39.084746] kmem_cache_free+0x10d/0x4d0 [ 39.085250] rcu_core+0x8c8/0x2860 [ 39.085702] __do_softirq+0x1b7/0x7d4 [ 39.086174] [ 39.086386] Last potentially related work creation: [ 39.086963] kasan_save_stack+0x22/0x50 [ 39.087466] __kasan_record_aux_stack+0x8e/0xa0 [ 39.088034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.088666] remove_vma+0x139/0x170 [ 39.089113] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.089670] do_vmi_munmap+0x1f1/0x2b0 [ 39.090149] __vm_munmap+0x138/0x3a0 [ 39.090617] __x64_sys_munmap+0x59/0x80 [ 39.091109] do_syscall_64+0x3f/0x90 [ 39.091579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.092210] [ 39.092421] The buggy address belongs to the object at ffff88801472cbc8 [ 39.092421] which belongs to the cache vm_area_struct of size 168 [ 39.093886] The buggy address is located 88 bytes inside of [ 39.093886] freed 168-byte region [ffff88801472cbc8, ffff88801472cc70) [ 39.095276] [ 39.095490] The buggy address belongs to the physical page: [ 39.096142] page:00000000a9d6fab4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1472c [ 39.097226] memcg:ffff888015e27301 [ 39.097663] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.098296] page_type: 0xffffffff() [ 39.098748] raw: 0100000000000200 ffff88800879fc80 ffffea000051eec0 dead000000000004 [ 39.099661] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e27301 [ 39.100551] page dumped because: kasan: bad access detected [ 39.101207] [ 39.101420] Memory state around the buggy address: [ 39.102002] ffff88801472cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.102848] ffff88801472cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.103695] >ffff88801472cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.104543] ^ [ 39.105066] ffff88801472cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.105933] ffff88801472cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.106782] ================================================================== [ 39.107810] Disabling lock debugging due to kernel taint [ 40.975814] BUG: Bad rss-counter state mm:000000004b76c8ea type:MM_FILEPAGES val:33 [ 40.976844] BUG: Bad rss-counter state mm:000000004b76c8ea type:MM_ANONPAGES val:22 [ 41.447675] BUG: Bad rss-counter state mm:00000000bdf63579 type:MM_FILEPAGES val:33 [ 41.448739] BUG: Bad rss-counter state mm:00000000bdf63579 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8504' (ECDSA) to the list of known hosts. 2023/06/20 07:29:48 fuzzer started 2023/06/20 07:29:48 dialing manager at localhost:44161 2023/06/20 07:29:48 checking machine... 2023/06/20 07:29:48 checking revisions... [ 42.191513] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:29:49 testing simple program... [ 42.232631] cgroup: Unknown subsys name 'net' [ 42.287768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:29:48 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f1abdfea650 CR3=000000001a108000 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=39323a3730203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732038343a3932 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343236 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=0000000000000000 RBX=ffff888008f92000 RCX=0000000000000000 RDX=ffff888014773680 RSI=ffffffff814833b2 RDI=ffffffff854ee9e0 RBP=ffffffff854ee9e0 RSP=ffff888016a6fd70 R8 =0000000000000001 R9 =ffffed1002c274a9 R10=0000000000000008 R11=0000000000000000 R12=0000000000000000 R13=ffff88801613a368 R14=ffff88801613a568 R15=0000000000000000 RIP=ffffffff814833b2 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 00007f1abda35900 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=00007f1abdfed0b0 CR3=000000000eccc000 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