syzkaller login: [ 31.081135] BUG: Bad rss-counter state mm:0000000099136917 type:MM_FILEPAGES val:33 [ 31.082091] BUG: Bad rss-counter state mm:0000000099136917 type:MM_ANONPAGES val:22 [ 31.239438] ================================================================== [ 31.240312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.241228] Read of size 8 at addr ffff888016ffa058 by task sshd/221 [ 31.241973] [ 31.242182] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.243114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.244081] Call Trace: [ 31.244382] [ 31.244653] dump_stack_lvl+0x91/0xf0 [ 31.245123] print_report+0xcc/0x620 [ 31.245623] ? __virt_addr_valid+0x102/0x340 [ 31.246142] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.246722] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.247302] kasan_report+0xbe/0xf0 [ 31.247746] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.248329] vma_interval_tree_remove+0xc75/0xec0 [ 31.248895] vma_prepare+0xc54/0x11a0 [ 31.249354] __split_vma+0x5af/0x950 [ 31.249816] ? __pfx___split_vma+0x10/0x10 [ 31.250326] ? find_held_lock+0x2c/0x110 [ 31.250835] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.251385] ? lock_is_held_type+0x9f/0x120 [ 31.251917] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.252505] ? mtree_range_walk+0x632/0x900 [ 31.253045] ? mas_walk+0x5c7/0x7c0 [ 31.253517] do_vmi_munmap+0x1f1/0x2b0 [ 31.253984] mmap_region+0x1f9/0x2660 [ 31.254451] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.254942] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.255640] ? __pfx_lock_acquire+0x10/0x10 [ 31.256160] ? __pfx_mmap_region+0x10/0x10 [ 31.256668] ? security_mmap_addr+0x7d/0xa0 [ 31.257210] ? get_unmapped_area+0x1f5/0x3f0 [ 31.257747] do_mmap+0x854/0xf00 [ 31.258174] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.258648] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.259189] ksys_mmap_pgoff+0x3af/0x500 [ 31.259674] do_syscall_64+0x3f/0x90 [ 31.260151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.260776] RIP: 0033:0x7fd15ded4d82 [ 31.261219] 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 [ 31.263263] RSP: 002b:00007fff3e311ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.264156] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd15ded4d82 [ 31.264971] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd15d30e000 [ 31.265806] RBP: 00007fd15d30e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.266633] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578f1d17f70 [ 31.267451] R13: 00007fff3e312010 R14: 00007fff3e312040 R15: 00007fff3e3123a0 [ 31.268288] [ 31.268570] [ 31.268785] Allocated by task 214: [ 31.269216] kasan_save_stack+0x22/0x50 [ 31.269707] kasan_set_track+0x25/0x30 [ 31.270188] __kasan_slab_alloc+0x59/0x70 [ 31.270687] kmem_cache_alloc+0x16b/0x370 [ 31.271185] vm_area_dup+0x20/0x160 [ 31.271626] __split_vma+0x170/0x950 [ 31.272087] split_vma+0xc6/0x110 [ 31.272514] mprotect_fixup+0x8d2/0xb30 [ 31.273001] do_mprotect_pkey+0x87e/0xd40 [ 31.273528] __x64_sys_mprotect+0x78/0xc0 [ 31.274026] do_syscall_64+0x3f/0x90 [ 31.274492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275106] [ 31.275312] Freed by task 214: [ 31.275685] kasan_save_stack+0x22/0x50 [ 31.276176] kasan_set_track+0x25/0x30 [ 31.276646] kasan_save_free_info+0x2b/0x50 [ 31.277171] __kasan_slab_free+0x10a/0x190 [ 31.277689] kmem_cache_free+0x10d/0x4d0 [ 31.278184] rcu_core+0x8c8/0x2860 [ 31.278615] __do_softirq+0x1b7/0x7d4 [ 31.279090] [ 31.279296] Last potentially related work creation: [ 31.279858] kasan_save_stack+0x22/0x50 [ 31.280356] __kasan_record_aux_stack+0x8e/0xa0 [ 31.280905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.281543] remove_vma+0x139/0x170 [ 31.281975] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.282519] do_vmi_munmap+0x1f1/0x2b0 [ 31.282988] __vm_munmap+0x138/0x3a0 [ 31.283444] __x64_sys_munmap+0x59/0x80 [ 31.283911] do_syscall_64+0x3f/0x90 [ 31.284441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285060] [ 31.285283] The buggy address belongs to the object at ffff888016ffa000 [ 31.285283] which belongs to the cache vm_area_struct of size 168 [ 31.286698] The buggy address is located 88 bytes inside of [ 31.286698] freed 168-byte region [ffff888016ffa000, ffff888016ffa0a8) [ 31.288045] [ 31.288250] The buggy address belongs to the physical page: [ 31.288888] page:0000000080fbb9d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ffa [ 31.289956] memcg:ffff88800f34b901 [ 31.290377] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.290997] page_type: 0xffffffff() [ 31.291438] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.292329] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f34b901 [ 31.293227] page dumped because: kasan: bad access detected [ 31.293859] [ 31.294072] Memory state around the buggy address: [ 31.294616] ffff888016ff9f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.295454] ffff888016ff9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.296274] >ffff888016ffa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.297086] ^ [ 31.297783] ffff888016ffa080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.298611] ffff888016ffa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.299434] ================================================================== [ 31.300329] Disabling lock debugging due to kernel taint [ 33.413949] BUG: Bad rss-counter state mm:00000000d6107ae4 type:MM_FILEPAGES val:33 [ 33.415232] BUG: Bad rss-counter state mm:00000000d6107ae4 type:MM_ANONPAGES val:22 [ 33.813311] BUG: Bad rss-counter state mm:00000000b9183363 type:MM_FILEPAGES val:33 [ 33.814475] BUG: Bad rss-counter state mm:00000000b9183363 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28095' (ECDSA) to the list of known hosts. 2023/06/20 11:46:26 fuzzer started 2023/06/20 11:46:26 dialing manager at localhost:36067 2023/06/20 11:46:26 checking machine... 2023/06/20 11:46:26 checking revisions... [ 34.486985] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:46:27 testing simple program... [ 34.523004] cgroup: Unknown subsys name 'net' [ 34.550407] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:46:26 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=00007f6fc8e5f4d0 CR3=000000000e546000 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=2036323a36343a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a36343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009a3f5a8 RCX=ffffffff83ab193d RDX=ffff888016dc3680 RSI=0000000000000004 RDI=ffffffff87f97e40 RBP=ffffffff87f97e40 RSP=ffff88800fa7f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a6600000a66 R12=0000000000000000 R13=00000000000000b5 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8180fea8 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 00007f198e6cd900 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=00007ffedb6cb000 CR3=000000001ca8c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000