syzkaller login: [ 32.244436] BUG: Bad rss-counter state mm:0000000080a00230 type:MM_FILEPAGES val:33 [ 32.245135] BUG: Bad rss-counter state mm:0000000080a00230 type:MM_ANONPAGES val:22 [ 32.358969] ================================================================== [ 32.359626] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.360278] Read of size 8 at addr ffff888015834a50 by task sshd/221 [ 32.360836] [ 32.360991] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.361603] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.362313] Call Trace: [ 32.362561] [ 32.362759] dump_stack_lvl+0x91/0xf0 [ 32.363281] print_report+0xcc/0x620 [ 32.363620] ? __virt_addr_valid+0x102/0x340 [ 32.364009] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.364447] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.364873] kasan_report+0xbe/0xf0 [ 32.365210] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.365643] vma_interval_tree_remove+0xc75/0xec0 [ 32.366072] vma_prepare+0xc54/0x11a0 [ 32.366407] __split_vma+0x5af/0x950 [ 32.366768] ? __pfx___split_vma+0x10/0x10 [ 32.367137] ? find_held_lock+0x2c/0x110 [ 32.367499] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.367899] ? lock_is_held_type+0x9f/0x120 [ 32.368276] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.368702] ? mtree_range_walk+0x632/0x900 [ 32.369091] ? mas_walk+0x5c7/0x7c0 [ 32.369428] do_vmi_munmap+0x1f1/0x2b0 [ 32.369768] mmap_region+0x1f9/0x2660 [ 32.370104] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.370458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.370969] ? __pfx_lock_acquire+0x10/0x10 [ 32.371339] ? __pfx_mmap_region+0x10/0x10 [ 32.371710] ? security_mmap_addr+0x7d/0xa0 [ 32.372080] ? get_unmapped_area+0x1f5/0x3f0 [ 32.372457] do_mmap+0x854/0xf00 [ 32.372761] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.373109] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.373495] ksys_mmap_pgoff+0x3af/0x500 [ 32.373848] do_syscall_64+0x3f/0x90 [ 32.374184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.374650] RIP: 0033:0x7faee39ead82 [ 32.374980] 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 [ 32.376490] RSP: 002b:00007ffca03c95b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.377130] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faee39ead82 [ 32.377726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faee2e24000 [ 32.378324] RBP: 00007faee2e24000 R08: 0000000000000009 R09: 0000000000001000 [ 32.378956] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e2f3cd4d90 [ 32.379548] R13: 00007ffca03c95d0 R14: 00007ffca03c9600 R15: 00007ffca03c9960 [ 32.380148] [ 32.380356] [ 32.380507] Allocated by task 214: [ 32.380817] kasan_save_stack+0x22/0x50 [ 32.381178] kasan_set_track+0x25/0x30 [ 32.381538] __kasan_slab_alloc+0x59/0x70 [ 32.381908] kmem_cache_alloc+0x16b/0x370 [ 32.382276] vm_area_dup+0x20/0x160 [ 32.382616] __split_vma+0x170/0x950 [ 32.382945] split_vma+0xc6/0x110 [ 32.383258] mprotect_fixup+0x8d2/0xb30 [ 32.383615] do_mprotect_pkey+0x87e/0xd40 [ 32.383982] __x64_sys_mprotect+0x78/0xc0 [ 32.384356] do_syscall_64+0x3f/0x90 [ 32.384697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.385153] [ 32.385306] Freed by task 13: [ 32.385576] kasan_save_stack+0x22/0x50 [ 32.385931] kasan_set_track+0x25/0x30 [ 32.386286] kasan_save_free_info+0x2b/0x50 [ 32.386669] __kasan_slab_free+0x10a/0x190 [ 32.387054] kmem_cache_free+0x10d/0x4d0 [ 32.387408] rcu_core+0x8c8/0x2860 [ 32.387726] __do_softirq+0x1b7/0x7d4 [ 32.388061] [ 32.388212] Last potentially related work creation: [ 32.388623] kasan_save_stack+0x22/0x50 [ 32.388986] __kasan_record_aux_stack+0x8e/0xa0 [ 32.389391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.389846] remove_vma+0x139/0x170 [ 32.390166] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.390589] do_vmi_munmap+0x1f1/0x2b0 [ 32.390928] __vm_munmap+0x138/0x3a0 [ 32.391267] __x64_sys_munmap+0x59/0x80 [ 32.391627] do_syscall_64+0x3f/0x90 [ 32.391966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.392427] [ 32.392584] The buggy address belongs to the object at ffff8880158349f8 [ 32.392584] which belongs to the cache vm_area_struct of size 168 [ 32.393625] The buggy address is located 88 bytes inside of [ 32.393625] freed 168-byte region [ffff8880158349f8, ffff888015834aa0) [ 32.394643] [ 32.394798] The buggy address belongs to the physical page: [ 32.395261] page:0000000034fee020 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15834 [ 32.396036] memcg:ffff88800f022701 [ 32.396346] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.396806] page_type: 0xffffffff() [ 32.397125] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.397775] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f022701 [ 32.398425] page dumped because: kasan: bad access detected [ 32.398921] [ 32.399073] Memory state around the buggy address: [ 32.399478] ffff888015834900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.400098] ffff888015834980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.400701] >ffff888015834a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.401298] ^ [ 32.401804] ffff888015834a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.402415] ffff888015834b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.403050] ================================================================== [ 32.403775] Disabling lock debugging due to kernel taint [ 34.484919] BUG: Bad rss-counter state mm:000000008bd27a0f type:MM_FILEPAGES val:33 [ 34.485628] BUG: Bad rss-counter state mm:000000008bd27a0f type:MM_ANONPAGES val:22 [ 34.881992] BUG: Bad rss-counter state mm:00000000840645a4 type:MM_FILEPAGES val:33 [ 34.883720] BUG: Bad rss-counter state mm:00000000840645a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9238' (ECDSA) to the list of known hosts. 2023/06/20 09:13:26 fuzzer started 2023/06/20 09:13:26 dialing manager at localhost:44161 2023/06/20 09:13:26 checking machine... 2023/06/20 09:13:26 checking revisions... [ 35.475583] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:13:26 testing simple program... [ 35.526805] cgroup: Unknown subsys name 'net' [ 35.562452] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:13:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff848ff060 RDI=ffff88800d857889 RBP=ffff88800d857868 RSP=ffff888016157448 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff87b86c40 R13=0000000000000000 R14=ffffffff87b67200 R15=ffff88800d857850 RIP=ffffffff812db3fc RFL=00000297 [--S-APC] 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 00007fc30320d900 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=00007fc3037c4618 CR3=000000000fc68000 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=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 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=00007fe775499700 CR3=00000000136fe000 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=2035323a33313a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a33313a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000