syzkaller login: [ 263.719135] BUG: Bad rss-counter state mm:00000000a034fbf0 type:MM_FILEPAGES val:33 [ 263.720429] BUG: Bad rss-counter state mm:00000000a034fbf0 type:MM_ANONPAGES val:22 [ 263.877372] ================================================================== [ 263.878378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 263.879629] Read of size 8 at addr ffff888013fbced8 by task sshd/221 [ 263.880492] [ 263.880754] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 263.881886] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 263.882805] Call Trace: [ 263.883103] [ 263.883369] dump_stack_lvl+0x91/0xf0 [ 263.883830] print_report+0xcc/0x620 [ 263.884283] ? __virt_addr_valid+0x102/0x340 [ 263.884837] ? vma_interval_tree_remove+0xc75/0xec0 [ 263.885426] ? vma_interval_tree_remove+0xc75/0xec0 [ 263.886004] kasan_report+0xbe/0xf0 [ 263.886453] ? vma_interval_tree_remove+0xc75/0xec0 [ 263.887034] vma_interval_tree_remove+0xc75/0xec0 [ 263.887599] vma_prepare+0xc54/0x11a0 [ 263.888054] __split_vma+0x5af/0x950 [ 263.888499] ? __pfx___split_vma+0x10/0x10 [ 263.889017] ? find_held_lock+0x2c/0x110 [ 263.889511] do_vmi_align_munmap+0x2ba/0x11f0 [ 263.890039] ? lock_is_held_type+0x9f/0x120 [ 263.890550] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 263.891129] ? mtree_range_walk+0x632/0x900 [ 263.891698] ? mas_walk+0x5c7/0x7c0 [ 263.892153] do_vmi_munmap+0x1f1/0x2b0 [ 263.892643] mmap_region+0x1f9/0x2660 [ 263.893099] ? vm_mmap_pgoff+0x15c/0x3a0 [ 263.893592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 263.894287] ? __pfx_lock_acquire+0x10/0x10 [ 263.894802] ? __pfx_mmap_region+0x10/0x10 [ 263.895319] ? security_mmap_addr+0x7d/0xa0 [ 263.895868] ? get_unmapped_area+0x1f5/0x3f0 [ 263.896391] do_mmap+0x854/0xf00 [ 263.896829] vm_mmap_pgoff+0x1a6/0x3a0 [ 263.897303] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 263.897842] ksys_mmap_pgoff+0x3af/0x500 [ 263.898329] do_syscall_64+0x3f/0x90 [ 263.898782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 263.899394] RIP: 0033:0x7f521c416d82 [ 263.899831] 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 [ 263.901870] RSP: 002b:00007fff06d9d3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 263.902738] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f521c416d82 [ 263.903545] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f521b850000 [ 263.904369] RBP: 00007f521b850000 R08: 0000000000000009 R09: 0000000000001000 [ 263.905199] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562435129b20 [ 263.906021] R13: 00007fff06d9d400 R14: 00007fff06d9d430 R15: 00007fff06d9d790 [ 263.906849] [ 263.907133] [ 263.907343] Allocated by task 214: [ 263.907760] kasan_save_stack+0x22/0x50 [ 263.908247] kasan_set_track+0x25/0x30 [ 263.908737] __kasan_slab_alloc+0x59/0x70 [ 263.909245] kmem_cache_alloc+0x16b/0x370 [ 263.909749] vm_area_dup+0x20/0x160 [ 263.910187] __split_vma+0x170/0x950 [ 263.910639] split_vma+0xc6/0x110 [ 263.911063] mprotect_fixup+0x8d2/0xb30 [ 263.911550] do_mprotect_pkey+0x87e/0xd40 [ 263.912055] __x64_sys_mprotect+0x78/0xc0 [ 263.912559] do_syscall_64+0x3f/0x90 [ 263.913028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 263.913652] [ 263.913864] Freed by task 19: [ 263.914243] kasan_save_stack+0x22/0x50 [ 263.914740] kasan_set_track+0x25/0x30 [ 263.915226] kasan_save_free_info+0x2b/0x50 [ 263.915742] __kasan_slab_free+0x10a/0x190 [ 263.916263] kmem_cache_free+0x10d/0x4d0 [ 263.916771] rcu_core+0x8c8/0x2860 [ 263.917207] __do_softirq+0x1b7/0x7d4 [ 263.917672] [ 263.917881] Last potentially related work creation: [ 263.918453] kasan_save_stack+0x22/0x50 [ 263.918945] __kasan_record_aux_stack+0x8e/0xa0 [ 263.919501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 263.920136] remove_vma+0x139/0x170 [ 263.920577] do_vmi_align_munmap+0xd4a/0x11f0 [ 263.921133] do_vmi_munmap+0x1f1/0x2b0 [ 263.921608] __vm_munmap+0x138/0x3a0 [ 263.922070] __x64_sys_munmap+0x59/0x80 [ 263.922554] do_syscall_64+0x3f/0x90 [ 263.923017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 263.923641] [ 263.923852] The buggy address belongs to the object at ffff888013fbce80 [ 263.923852] which belongs to the cache vm_area_struct of size 168 [ 263.925293] The buggy address is located 88 bytes inside of [ 263.925293] freed 168-byte region [ffff888013fbce80, ffff888013fbcf28) [ 263.926664] [ 263.926873] The buggy address belongs to the physical page: [ 263.927513] page:0000000091678342 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13fbc [ 263.928579] memcg:ffff888013fb8101 [ 263.929020] flags: 0x100000000000200(slab|node=0|zone=1) [ 263.929679] page_type: 0xffffffff() [ 263.930152] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 263.931116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fb8101 [ 263.932039] page dumped because: kasan: bad access detected [ 263.932690] [ 263.932906] Memory state around the buggy address: [ 263.933486] ffff888013fbcd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 263.934342] ffff888013fbce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 263.935194] >ffff888013fbce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 263.936060] ^ [ 263.936812] ffff888013fbcf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 263.937660] ffff888013fbcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 263.938505] ================================================================== [ 263.939493] Disabling lock debugging due to kernel taint [ 265.883366] BUG: Bad rss-counter state mm:00000000e0cc52c3 type:MM_FILEPAGES val:33 [ 265.884363] BUG: Bad rss-counter state mm:00000000e0cc52c3 type:MM_ANONPAGES val:22 [ 266.326128] BUG: Bad rss-counter state mm:000000001eca7985 type:MM_FILEPAGES val:33 [ 266.327720] BUG: Bad rss-counter state mm:000000001eca7985 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51238' (ECDSA) to the list of known hosts. 2023/06/20 02:30:34 fuzzer started 2023/06/20 02:30:34 dialing manager at localhost:44161 2023/06/20 02:30:34 checking machine... 2023/06/20 02:30:34 checking revisions... [ 267.054924] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:30:34 testing simple program... [ 267.107910] cgroup: Unknown subsys name 'net' [ 267.174038] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:26:41 Registers: info registers vcpu 0 RAX=ffffffff8180c522 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=1ffff1100d9c1359 RSI=ffffffff8180c522 RDI=ffff88806ce09b38 RBP=ffff88806ce09b08 RSP=ffff88806ce09a68 R8 =ffffffff860d68fa R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff88800e443680 R15=ffff88800f6cae80 RIP=ffffffff84532440 RFL=00000286 [--S--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 00007f42b8444900 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=00007f42b89fc0b0 CR3=0000000016ddc000 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=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=00007ffd88563ec8 CR3=000000000ed84000 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=2033333a30333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a30333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000