syzkaller login: [ 66.938942] BUG: Bad rss-counter state mm:0000000064ac22ed type:MM_FILEPAGES val:33 [ 66.940067] BUG: Bad rss-counter state mm:0000000064ac22ed type:MM_ANONPAGES val:22 [ 67.109297] ================================================================== [ 67.110263] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.111204] Read of size 8 at addr ffff88800de68c20 by task sshd/219 [ 67.112069] [ 67.112288] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 67.113324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.114320] Call Trace: [ 67.114648] [ 67.114934] dump_stack_lvl+0x91/0xf0 [ 67.115427] print_report+0xcc/0x620 [ 67.115908] ? __virt_addr_valid+0x102/0x340 [ 67.116459] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.117088] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.117707] kasan_report+0xbe/0xf0 [ 67.118180] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.118803] vma_interval_tree_remove+0xc75/0xec0 [ 67.119402] vma_prepare+0xc54/0x11a0 [ 67.119874] __split_vma+0x5af/0x950 [ 67.120346] ? __pfx___split_vma+0x10/0x10 [ 67.120894] ? find_held_lock+0x2c/0x110 [ 67.121406] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.121978] ? lock_is_held_type+0x9f/0x120 [ 67.122513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.123114] ? mtree_range_walk+0x632/0x900 [ 67.123657] ? mas_walk+0x5c7/0x7c0 [ 67.124123] do_vmi_munmap+0x1f1/0x2b0 [ 67.124618] mmap_region+0x1f9/0x2660 [ 67.125100] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.125609] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.126311] ? __pfx_lock_acquire+0x10/0x10 [ 67.126840] ? __pfx_mmap_region+0x10/0x10 [ 67.127366] ? security_mmap_addr+0x7d/0xa0 [ 67.127891] ? get_unmapped_area+0x1f5/0x3f0 [ 67.128437] do_mmap+0x854/0xf00 [ 67.128887] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.129382] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.129946] ksys_mmap_pgoff+0x3af/0x500 [ 67.130456] do_syscall_64+0x3f/0x90 [ 67.130938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.131578] RIP: 0033:0x7fe37e9d0d82 [ 67.132031] 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 [ 67.134148] RSP: 002b:00007ffd70f2e6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.135044] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe37e9d0d82 [ 67.135886] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe37de0a000 [ 67.136735] RBP: 00007fe37de0a000 R08: 0000000000000009 R09: 0000000000001000 [ 67.137567] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564331917ec0 [ 67.138409] R13: 00007ffd70f2e710 R14: 00007ffd70f2e740 R15: 00007ffd70f2eaa0 [ 67.139269] [ 67.139561] [ 67.139775] Allocated by task 212: [ 67.140204] kasan_save_stack+0x22/0x50 [ 67.140720] kasan_set_track+0x25/0x30 [ 67.141209] __kasan_slab_alloc+0x59/0x70 [ 67.141733] kmem_cache_alloc+0x16b/0x370 [ 67.142265] vm_area_dup+0x20/0x160 [ 67.142713] __split_vma+0x170/0x950 [ 67.143173] split_vma+0xc6/0x110 [ 67.143609] mprotect_fixup+0x8d2/0xb30 [ 67.144122] do_mprotect_pkey+0x87e/0xd40 [ 67.144660] __x64_sys_mprotect+0x78/0xc0 [ 67.145183] do_syscall_64+0x3f/0x90 [ 67.145666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.146305] [ 67.146521] Freed by task 212: [ 67.146910] kasan_save_stack+0x22/0x50 [ 67.147416] kasan_set_track+0x25/0x30 [ 67.147917] kasan_save_free_info+0x2b/0x50 [ 67.148454] __kasan_slab_free+0x10a/0x190 [ 67.148994] kmem_cache_free+0x10d/0x4d0 [ 67.149499] rcu_core+0x8c8/0x2860 [ 67.149953] __do_softirq+0x1b7/0x7d4 [ 67.150445] [ 67.150658] Last potentially related work creation: [ 67.151244] kasan_save_stack+0x22/0x50 [ 67.151744] __kasan_record_aux_stack+0x8e/0xa0 [ 67.152313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.152977] remove_vma+0x139/0x170 [ 67.153425] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.153979] do_vmi_munmap+0x1f1/0x2b0 [ 67.154457] __vm_munmap+0x138/0x3a0 [ 67.154919] __x64_sys_munmap+0x59/0x80 [ 67.155410] do_syscall_64+0x3f/0x90 [ 67.155884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.156529] [ 67.156752] The buggy address belongs to the object at ffff88800de68bc8 [ 67.156752] which belongs to the cache vm_area_struct of size 168 [ 67.158202] The buggy address is located 88 bytes inside of [ 67.158202] freed 168-byte region [ffff88800de68bc8, ffff88800de68c70) [ 67.159661] [ 67.159913] The buggy address belongs to the physical page: [ 67.160586] page:000000001c0a1912 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde68 [ 67.161665] memcg:ffff88800961ed01 [ 67.162090] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.162730] page_type: 0xffffffff() [ 67.163176] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.164088] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800961ed01 [ 67.164998] page dumped because: kasan: bad access detected [ 67.165651] [ 67.165863] Memory state around the buggy address: [ 67.166443] ffff88800de68b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.167285] ffff88800de68b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 67.168129] >ffff88800de68c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 67.169005] ^ [ 67.169533] ffff88800de68c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 67.170394] ffff88800de68d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 67.171241] ================================================================== [ 67.172235] Disabling lock debugging due to kernel taint [ 69.521385] BUG: Bad rss-counter state mm:00000000c4cf0a84 type:MM_FILEPAGES val:33 [ 69.522358] BUG: Bad rss-counter state mm:00000000c4cf0a84 type:MM_ANONPAGES val:22 [ 70.056369] BUG: Bad rss-counter state mm:00000000de38eb7f type:MM_FILEPAGES val:33 [ 70.057643] BUG: Bad rss-counter state mm:00000000de38eb7f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50853' (ECDSA) to the list of known hosts. 2023/06/19 14:45:41 fuzzer started 2023/06/19 14:45:41 dialing manager at localhost:44161 2023/06/19 14:45:41 checking machine... 2023/06/19 14:45:41 checking revisions... [ 70.709898] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:45:41 testing simple program... [ 70.757603] cgroup: Unknown subsys name 'net' [ 70.793678] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:45:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880146af5e0 RCX=0000000000000001 RDX=1ffff110028d5ebd RSI=ffffffff81807ebb RDI=ffff8880146af5e8 RBP=0000000000000003 RSP=ffff8880146af4f8 R8 =0000000000000001 R9 =ffff8880146af558 R10=0000000000038001 R11=0000000000020de7 R12=ffff8880146af5e0 R13=0000000000000000 R14=ffff88800f03b680 R15=0000000000000d40 RIP=ffffffff813ad485 RFL=00000287 [--S--PC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3b0b47d900 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=00007f3b0a8bf5e0 CR3=0000000014610000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e8090077cbffe13700000000000ae988 XMM05=b7c3fa05eb4818c90000000000139c30 XMM06=19e9129bd510f2350000000000138d78 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffe50704d08 CR3=000000000e1b6000 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=2031343a35343a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a35343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000