syzkaller login: [ 40.091159] BUG: Bad rss-counter state mm:00000000c383b7b1 type:MM_FILEPAGES val:33 [ 40.092631] BUG: Bad rss-counter state mm:00000000c383b7b1 type:MM_ANONPAGES val:22 [ 40.239376] ================================================================== [ 40.240293] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.241236] Read of size 8 at addr ffff88800f030b38 by task sshd/219 [ 40.242092] [ 40.242373] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.243249] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.244238] Call Trace: [ 40.244586] [ 40.244870] dump_stack_lvl+0x91/0xf0 [ 40.245371] print_report+0xcc/0x620 [ 40.245874] ? __virt_addr_valid+0x102/0x340 [ 40.246440] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.247071] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.247704] kasan_report+0xbe/0xf0 [ 40.248184] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.248815] vma_interval_tree_remove+0xc75/0xec0 [ 40.249416] vma_prepare+0xc54/0x11a0 [ 40.249910] __split_vma+0x5af/0x950 [ 40.250382] ? __pfx___split_vma+0x10/0x10 [ 40.250913] ? find_held_lock+0x2c/0x110 [ 40.251436] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.252000] ? lock_is_held_type+0x9f/0x120 [ 40.252537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.253142] ? mtree_range_walk+0x632/0x900 [ 40.253691] ? mas_walk+0x5c7/0x7c0 [ 40.254184] do_vmi_munmap+0x1f1/0x2b0 [ 40.254676] mmap_region+0x1f9/0x2660 [ 40.255161] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.255674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.256406] ? __pfx_lock_acquire+0x10/0x10 [ 40.256949] ? __pfx_mmap_region+0x10/0x10 [ 40.257492] ? security_mmap_addr+0x7d/0xa0 [ 40.258044] ? get_unmapped_area+0x1f5/0x3f0 [ 40.258602] do_mmap+0x854/0xf00 [ 40.259045] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.259538] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.260117] ksys_mmap_pgoff+0x3af/0x500 [ 40.260626] do_syscall_64+0x3f/0x90 [ 40.261115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.261780] RIP: 0033:0x7f69bc70fd82 [ 40.262249] 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 [ 40.264391] RSP: 002b:00007ffc360983d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.265303] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69bc70fd82 [ 40.266156] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69bbb49000 [ 40.266998] RBP: 00007f69bbb49000 R08: 0000000000000009 R09: 0000000000001000 [ 40.267845] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626f1255ec0 [ 40.268695] R13: 00007ffc360983f0 R14: 00007ffc36098420 R15: 00007ffc36098780 [ 40.269552] [ 40.269859] [ 40.270081] Allocated by task 212: [ 40.270513] kasan_save_stack+0x22/0x50 [ 40.271018] kasan_set_track+0x25/0x30 [ 40.271511] __kasan_slab_alloc+0x59/0x70 [ 40.272048] kmem_cache_alloc+0x16b/0x370 [ 40.272569] vm_area_dup+0x20/0x160 [ 40.273031] __split_vma+0x170/0x950 [ 40.273504] split_vma+0xc6/0x110 [ 40.273969] mprotect_fixup+0x8d2/0xb30 [ 40.274470] do_mprotect_pkey+0x87e/0xd40 [ 40.274990] __x64_sys_mprotect+0x78/0xc0 [ 40.275508] do_syscall_64+0x3f/0x90 [ 40.275982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.276623] [ 40.276840] Freed by task 212: [ 40.277231] kasan_save_stack+0x22/0x50 [ 40.277733] kasan_set_track+0x25/0x30 [ 40.278243] kasan_save_free_info+0x2b/0x50 [ 40.278776] __kasan_slab_free+0x10a/0x190 [ 40.279308] kmem_cache_free+0x10d/0x4d0 [ 40.279819] rcu_core+0x8c8/0x2860 [ 40.280272] __do_softirq+0x1b7/0x7d4 [ 40.280747] [ 40.280961] Last potentially related work creation: [ 40.281573] kasan_save_stack+0x22/0x50 [ 40.282092] __kasan_record_aux_stack+0x8e/0xa0 [ 40.282671] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.283394] remove_vma+0x139/0x170 [ 40.283847] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.284403] do_vmi_munmap+0x1f1/0x2b0 [ 40.284892] __vm_munmap+0x138/0x3a0 [ 40.285359] __x64_sys_munmap+0x59/0x80 [ 40.285862] do_syscall_64+0x3f/0x90 [ 40.286344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.286995] [ 40.287209] The buggy address belongs to the object at ffff88800f030ae0 [ 40.287209] which belongs to the cache vm_area_struct of size 168 [ 40.288687] The buggy address is located 88 bytes inside of [ 40.288687] freed 168-byte region [ffff88800f030ae0, ffff88800f030b88) [ 40.290102] [ 40.290320] The buggy address belongs to the physical page: [ 40.290976] page:00000000ed3f1b3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf030 [ 40.292063] memcg:ffff88800c5ca301 [ 40.292493] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.293148] page_type: 0xffffffff() [ 40.293595] raw: 0100000000000200 ffff88800879fc80 ffffea0000252dc0 dead000000000008 [ 40.294547] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5ca301 [ 40.295454] page dumped because: kasan: bad access detected [ 40.296116] [ 40.296334] Memory state around the buggy address: [ 40.296912] ffff88800f030a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.297777] ffff88800f030a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 40.298639] >ffff88800f030b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.299486] ^ [ 40.300100] ffff88800f030b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.300958] ffff88800f030c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.301829] ================================================================== [ 40.302760] Disabling lock debugging due to kernel taint [ 43.099401] BUG: Bad rss-counter state mm:000000007a4f4039 type:MM_FILEPAGES val:33 [ 43.100274] BUG: Bad rss-counter state mm:000000007a4f4039 type:MM_ANONPAGES val:22 [ 43.586947] BUG: Bad rss-counter state mm:000000008c02f81c type:MM_FILEPAGES val:33 [ 43.588114] BUG: Bad rss-counter state mm:000000008c02f81c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41661' (ECDSA) to the list of known hosts. 2023/06/20 04:40:18 fuzzer started 2023/06/20 04:40:18 dialing manager at localhost:44161 2023/06/20 04:40:18 checking machine... 2023/06/20 04:40:18 checking revisions... [ 44.368049] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:40:18 testing simple program... [ 44.415382] cgroup: Unknown subsys name 'net' [ 44.456169] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:40:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff888016effcd8 RDI=ffff88806ce09aa8 RBP=ffff888016effcd8 RSP=ffff88806ce099f0 R8 =ffffffff864b4a0e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5bb5 R12=0000000000000008 R13=ffff888016ef8000 R14=ffff888016effce0 R15=ffff88806ce09a98 RIP=ffffffff81130468 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 00007fda9ba4d900 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=00007fda9c0050b0 CR3=00000000095e4000 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=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=00007f6b369100c0 CR3=000000000e8a6000 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=2037313a30343a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a30343a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000