syzkaller login: [ 46.125609] BUG: Bad rss-counter state mm:000000000226b91c type:MM_FILEPAGES val:33 [ 46.127408] BUG: Bad rss-counter state mm:000000000226b91c type:MM_ANONPAGES val:22 [ 46.338980] ================================================================== [ 46.339597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.340233] Read of size 8 at addr ffff88800cf60798 by task sshd/220 [ 46.348759] [ 46.348908] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.349451] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.350073] Call Trace: [ 46.350282] [ 46.350470] dump_stack_lvl+0x91/0xf0 [ 46.350790] print_report+0xcc/0x620 [ 46.351109] ? __virt_addr_valid+0x102/0x340 [ 46.351458] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.351849] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.352250] kasan_report+0xbe/0xf0 [ 46.352669] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.353072] vma_interval_tree_remove+0xc75/0xec0 [ 46.353457] vma_prepare+0xc54/0x11a0 [ 46.353768] __split_vma+0x5af/0x950 [ 46.354077] ? __pfx___split_vma+0x10/0x10 [ 46.354417] ? find_held_lock+0x2c/0x110 [ 46.354756] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.355118] ? lock_is_held_type+0x9f/0x120 [ 46.355469] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.355855] ? mtree_range_walk+0x632/0x900 [ 46.356219] ? mas_walk+0x5c7/0x7c0 [ 46.356538] do_vmi_munmap+0x1f1/0x2b0 [ 46.356865] mmap_region+0x1f9/0x2660 [ 46.357177] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.357508] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.357963] ? __pfx_lock_acquire+0x10/0x10 [ 46.358303] ? __pfx_mmap_region+0x10/0x10 [ 46.358643] ? security_mmap_addr+0x7d/0xa0 [ 46.359024] ? get_unmapped_area+0x1f5/0x3f0 [ 46.359381] do_mmap+0x854/0xf00 [ 46.359666] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.360016] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.360379] ksys_mmap_pgoff+0x3af/0x500 [ 46.360723] do_syscall_64+0x3f/0x90 [ 46.361074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.361499] RIP: 0033:0x7f8789474d82 [ 46.361816] 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 [ 46.363227] RSP: 002b:00007fffc9e7ebe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.363824] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8789474d82 [ 46.364371] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87888ae000 [ 46.364993] RBP: 00007f87888ae000 R08: 0000000000000009 R09: 0000000000001000 [ 46.365541] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcb6404ec0 [ 46.366077] R13: 00007fffc9e7ec00 R14: 00007fffc9e7ec30 R15: 00007fffc9e7ef90 [ 46.366622] [ 46.366810] [ 46.366950] Allocated by task 211: [ 46.367230] kasan_save_stack+0x22/0x50 [ 46.367561] kasan_set_track+0x25/0x30 [ 46.367896] __kasan_slab_alloc+0x59/0x70 [ 46.368226] kmem_cache_alloc+0x16b/0x370 [ 46.368573] vm_area_dup+0x20/0x160 [ 46.368874] __split_vma+0x170/0x950 [ 46.369209] split_vma+0xc6/0x110 [ 46.369488] mprotect_fixup+0x8d2/0xb30 [ 46.369815] do_mprotect_pkey+0x87e/0xd40 [ 46.370161] __x64_sys_mprotect+0x78/0xc0 [ 46.370487] do_syscall_64+0x3f/0x90 [ 46.370783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.371191] [ 46.371328] Freed by task 211: [ 46.371575] kasan_save_stack+0x22/0x50 [ 46.371894] kasan_set_track+0x25/0x30 [ 46.372202] kasan_save_free_info+0x2b/0x50 [ 46.372555] __kasan_slab_free+0x10a/0x190 [ 46.372895] kmem_cache_free+0x10d/0x4d0 [ 46.373226] rcu_core+0x8c8/0x2860 [ 46.373509] __do_softirq+0x1b7/0x7d4 [ 46.373811] [ 46.373949] Last potentially related work creation: [ 46.374312] kasan_save_stack+0x22/0x50 [ 46.374626] __kasan_record_aux_stack+0x8e/0xa0 [ 46.374988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.375388] remove_vma+0x139/0x170 [ 46.375671] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.376026] do_vmi_munmap+0x1f1/0x2b0 [ 46.376331] __vm_munmap+0x138/0x3a0 [ 46.376667] __x64_sys_munmap+0x59/0x80 [ 46.376988] do_syscall_64+0x3f/0x90 [ 46.377285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.377692] [ 46.377834] Second to last potentially related work creation: [ 46.378282] kasan_save_stack+0x22/0x50 [ 46.378616] __kasan_record_aux_stack+0x8e/0xa0 [ 46.378992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.379410] remove_vma+0x139/0x170 [ 46.379705] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.380073] do_vmi_munmap+0x1f1/0x2b0 [ 46.380391] __vm_munmap+0x138/0x3a0 [ 46.380718] __x64_sys_munmap+0x59/0x80 [ 46.381042] do_syscall_64+0x3f/0x90 [ 46.381343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.381752] [ 46.381891] The buggy address belongs to the object at ffff88800cf60740 [ 46.381891] which belongs to the cache vm_area_struct of size 168 [ 46.382817] The buggy address is located 88 bytes inside of [ 46.382817] freed 168-byte region [ffff88800cf60740, ffff88800cf607e8) [ 46.383701] [ 46.383842] The buggy address belongs to the physical page: [ 46.384281] page:00000000fb9c8e61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf60 [ 46.384988] memcg:ffff88800ceb1501 [ 46.385264] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.385674] page_type: 0xffffffff() [ 46.385961] raw: 0100000000000200 ffff88800879fc80 ffffea0000339880 dead000000000002 [ 46.386529] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ceb1501 [ 46.387101] page dumped because: kasan: bad access detected [ 46.387515] [ 46.387652] Memory state around the buggy address: [ 46.388018] ffff88800cf60680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.388598] ffff88800cf60700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 46.389191] >ffff88800cf60780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 46.389720] ^ [ 46.390062] ffff88800cf60800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 46.390592] ffff88800cf60880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 46.391169] ================================================================== [ 46.392112] Disabling lock debugging due to kernel taint [ 49.031944] BUG: Bad rss-counter state mm:00000000a88d05b3 type:MM_FILEPAGES val:33 [ 49.035036] BUG: Bad rss-counter state mm:00000000a88d05b3 type:MM_ANONPAGES val:22 [ 49.511985] BUG: Bad rss-counter state mm:000000001a758511 type:MM_FILEPAGES val:33 [ 49.513059] BUG: Bad rss-counter state mm:000000001a758511 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30436' (ECDSA) to the list of known hosts. 2023/06/20 10:21:03 fuzzer started 2023/06/20 10:21:03 dialing manager at localhost:44161 2023/06/20 10:21:03 checking machine... 2023/06/20 10:21:03 checking revisions... [ 50.416620] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:21:04 testing simple program... [ 50.474148] cgroup: Unknown subsys name 'net' [ 50.568402] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:20:49 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88806ce361a0 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81839a7d RBP=ffff88806ce361c8 RSP=ffff88800fc0fad8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000fffffee8 R15=0000000000000000 RIP=ffffffff81839a81 RFL=00000246 [---Z-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 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=00007ff67e317328 CR3=000000001aafa000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f443e3e8340 CR3=000000000cbb6000 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=2033303a31323a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a31323a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000