syzkaller login: [ 65.193649] BUG: Bad rss-counter state mm:000000005f5e8a97 type:MM_FILEPAGES val:33 [ 65.194504] BUG: Bad rss-counter state mm:000000005f5e8a97 type:MM_ANONPAGES val:22 [ 65.310807] ================================================================== [ 65.311432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 65.312058] Read of size 8 at addr ffff88800e492140 by task sshd/227 [ 65.312570] [ 65.312718] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 65.313295] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 65.313953] Call Trace: [ 65.314169] [ 65.314362] dump_stack_lvl+0x91/0xf0 [ 65.314700] print_report+0xcc/0x620 [ 65.315026] ? __virt_addr_valid+0x102/0x340 [ 65.315492] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.315916] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.316325] kasan_report+0xbe/0xf0 [ 65.316627] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.317057] vma_interval_tree_remove+0xc75/0xec0 [ 65.317487] vma_prepare+0xc54/0x11a0 [ 65.317809] __split_vma+0x5af/0x950 [ 65.318130] ? __pfx___split_vma+0x10/0x10 [ 65.318499] ? find_held_lock+0x2c/0x110 [ 65.318855] do_vmi_align_munmap+0x2ba/0x11f0 [ 65.319241] ? lock_is_held_type+0x9f/0x120 [ 65.319604] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 65.320016] ? mtree_range_walk+0x632/0x900 [ 65.320382] ? mas_walk+0x5c7/0x7c0 [ 65.320693] do_vmi_munmap+0x1f1/0x2b0 [ 65.321030] mmap_region+0x1f9/0x2660 [ 65.321349] ? vm_mmap_pgoff+0x15c/0x3a0 [ 65.321685] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 65.322161] ? __pfx_lock_acquire+0x10/0x10 [ 65.322512] ? __pfx_mmap_region+0x10/0x10 [ 65.322859] ? security_mmap_addr+0x7d/0xa0 [ 65.323210] ? get_unmapped_area+0x1f5/0x3f0 [ 65.323579] do_mmap+0x854/0xf00 [ 65.323872] vm_mmap_pgoff+0x1a6/0x3a0 [ 65.324197] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 65.324571] ksys_mmap_pgoff+0x3af/0x500 [ 65.324908] do_syscall_64+0x3f/0x90 [ 65.325236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.325669] RIP: 0033:0x7effe3daed82 [ 65.325969] 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 [ 65.327386] RSP: 002b:00007ffc3370d128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 65.327989] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effe3daed82 [ 65.328550] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effe31e8000 [ 65.329119] RBP: 00007effe31e8000 R08: 0000000000000009 R09: 0000000000001000 [ 65.329676] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c7f82dec0 [ 65.330234] R13: 00007ffc3370d140 R14: 00007ffc3370d170 R15: 00007ffc3370d4d0 [ 65.330807] [ 65.330996] [ 65.331145] Allocated by task 220: [ 65.331429] kasan_save_stack+0x22/0x50 [ 65.331762] kasan_set_track+0x25/0x30 [ 65.332090] __kasan_slab_alloc+0x59/0x70 [ 65.332433] kmem_cache_alloc+0x16b/0x370 [ 65.332782] vm_area_dup+0x20/0x160 [ 65.333082] __split_vma+0x170/0x950 [ 65.333390] split_vma+0xc6/0x110 [ 65.333674] mprotect_fixup+0x8d2/0xb30 [ 65.334006] do_mprotect_pkey+0x87e/0xd40 [ 65.334352] __x64_sys_mprotect+0x78/0xc0 [ 65.334692] do_syscall_64+0x3f/0x90 [ 65.335003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.335438] [ 65.335578] Freed by task 220: [ 65.335836] kasan_save_stack+0x22/0x50 [ 65.336171] kasan_set_track+0x25/0x30 [ 65.336507] kasan_save_free_info+0x2b/0x50 [ 65.336859] __kasan_slab_free+0x10a/0x190 [ 65.337228] kmem_cache_free+0x10d/0x4d0 [ 65.337564] rcu_core+0x8c8/0x2860 [ 65.337856] __do_softirq+0x1b7/0x7d4 [ 65.338173] [ 65.338314] Last potentially related work creation: [ 65.338700] kasan_save_stack+0x22/0x50 [ 65.339028] __kasan_record_aux_stack+0x8e/0xa0 [ 65.339404] __call_rcu_common.constprop.0+0x6a/0xb90 [ 65.339827] remove_vma+0x139/0x170 [ 65.340126] do_vmi_align_munmap+0xd4a/0x11f0 [ 65.340494] do_vmi_munmap+0x1f1/0x2b0 [ 65.340810] __vm_munmap+0x138/0x3a0 [ 65.341120] __x64_sys_munmap+0x59/0x80 [ 65.341449] do_syscall_64+0x3f/0x90 [ 65.341762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.342183] [ 65.342326] The buggy address belongs to the object at ffff88800e4920e8 [ 65.342326] which belongs to the cache vm_area_struct of size 168 [ 65.343312] The buggy address is located 88 bytes inside of [ 65.343312] freed 168-byte region [ffff88800e4920e8, ffff88800e492190) [ 65.344246] [ 65.344387] The buggy address belongs to the physical page: [ 65.344828] page:00000000ce1cddc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe492 [ 65.345554] memcg:ffff8880159cbc01 [ 65.345837] flags: 0x100000000000200(slab|node=0|zone=1) [ 65.346267] page_type: 0xffffffff() [ 65.346569] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 65.347180] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159cbc01 [ 65.347785] page dumped because: kasan: bad access detected [ 65.348226] [ 65.348370] Memory state around the buggy address: [ 65.348753] ffff88800e492000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 65.349326] ffff88800e492080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 65.349897] >ffff88800e492100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.350468] ^ [ 65.350894] ffff88800e492180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 65.351465] ffff88800e492200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 65.352027] ================================================================== [ 65.352676] Disabling lock debugging due to kernel taint [ 67.137081] BUG: Bad rss-counter state mm:00000000613c8494 type:MM_FILEPAGES val:33 [ 67.138066] BUG: Bad rss-counter state mm:00000000613c8494 type:MM_ANONPAGES val:22 [ 67.537238] BUG: Bad rss-counter state mm:0000000002b8cda5 type:MM_FILEPAGES val:33 [ 67.538961] BUG: Bad rss-counter state mm:0000000002b8cda5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55830' (ECDSA) to the list of known hosts. 2023/06/20 12:37:23 fuzzer started 2023/06/20 12:37:23 dialing manager at localhost:36067 2023/06/20 12:37:23 checking machine... 2023/06/20 12:37:23 checking revisions... [ 68.238642] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:37:23 testing simple program... [ 68.285631] cgroup: Unknown subsys name 'net' [ 68.335782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:37:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffd97aef248 CR3=0000000019ed8000 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=2033323a37333a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3733 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3733325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a37333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000040 RBX=ffff888016c779f0 RCX=0000000000000001 RDX=1ffff11002d8ef4f RSI=ffffffff81f05454 RDI=ffff888016c779fc RBP=ffff888016c77a78 RSP=ffff888016c77908 R8 =0000000000000001 R9 =ffff888016c77968 R10=0000000000038001 R11=0000000000020d7b R12=ffff888016c779f0 R13=0000000000000000 R14=ffff888018cf3680 R15=ffff88800cbbb000 RIP=ffffffff813ad553 RFL=00000283 [--S---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 00007f29618e1900 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=00007f2961e98618 CR3=000000000dcca000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000