syzkaller login: [ 31.065442] BUG: Bad rss-counter state mm:00000000924d35b0 type:MM_FILEPAGES val:33 [ 31.066660] BUG: Bad rss-counter state mm:00000000924d35b0 type:MM_ANONPAGES val:22 [ 31.104293] ================================================================== [ 31.105465] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.106588] Read of size 8 at addr ffff88800683a4e0 by task sshd/219 [ 31.107521] [ 31.107767] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.108831] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.110229] Call Trace: [ 31.110612] [ 31.110945] dump_stack_lvl+0x91/0xf0 [ 31.111526] print_report+0xcc/0x620 [ 31.112103] ? __virt_addr_valid+0x102/0x340 [ 31.112781] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.113517] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.114202] kasan_report+0xbe/0xf0 [ 31.114734] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.115598] vma_interval_tree_remove+0xc75/0xec0 [ 31.116252] vma_prepare+0xc54/0x11a0 [ 31.116772] __split_vma+0x5af/0x950 [ 31.117342] ? __pfx___split_vma+0x10/0x10 [ 31.117931] ? find_held_lock+0x2c/0x110 [ 31.118510] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.119139] ? lock_is_held_type+0x9f/0x120 [ 31.119739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.120405] ? mtree_range_walk+0x632/0x900 [ 31.121046] ? mas_walk+0x5c7/0x7c0 [ 31.121570] do_vmi_munmap+0x1f1/0x2b0 [ 31.122108] mmap_region+0x1f9/0x2660 [ 31.122648] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.123224] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.124031] ? __pfx_lock_acquire+0x10/0x10 [ 31.124629] ? __pfx_mmap_region+0x10/0x10 [ 31.125248] ? security_mmap_addr+0x7d/0xa0 [ 31.125843] ? get_unmapped_area+0x1f5/0x3f0 [ 31.126472] do_mmap+0x854/0xf00 [ 31.126974] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.127542] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.128166] ksys_mmap_pgoff+0x3af/0x500 [ 31.128742] do_syscall_64+0x3f/0x90 [ 31.129299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.130021] RIP: 0033:0x7fa56de45d82 [ 31.130565] 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 [ 31.133004] RSP: 002b:00007fff6ee27a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.133978] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa56de45d82 [ 31.134886] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa56d27f000 [ 31.135789] RBP: 00007fa56d27f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.136705] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ab8fb1ec0 [ 31.137629] R13: 00007fff6ee27a40 R14: 00007fff6ee27a70 R15: 00007fff6ee27dd0 [ 31.138546] [ 31.138857] [ 31.139089] Allocated by task 212: [ 31.139548] kasan_save_stack+0x22/0x50 [ 31.140089] kasan_set_track+0x25/0x30 [ 31.140632] __kasan_slab_alloc+0x59/0x70 [ 31.141196] kmem_cache_alloc+0x16b/0x370 [ 31.141753] vm_area_dup+0x20/0x160 [ 31.142236] __split_vma+0x170/0x950 [ 31.142730] split_vma+0xc6/0x110 [ 31.143199] mprotect_fixup+0x8d2/0xb30 [ 31.143738] do_mprotect_pkey+0x87e/0xd40 [ 31.144297] __x64_sys_mprotect+0x78/0xc0 [ 31.144854] do_syscall_64+0x3f/0x90 [ 31.145374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.146065] [ 31.146295] Freed by task 19: [ 31.146706] kasan_save_stack+0x22/0x50 [ 31.147242] kasan_set_track+0x25/0x30 [ 31.147769] kasan_save_free_info+0x2b/0x50 [ 31.148341] __kasan_slab_free+0x10a/0x190 [ 31.148914] kmem_cache_free+0x10d/0x4d0 [ 31.149470] rcu_core+0x8c8/0x2860 [ 31.149946] __do_softirq+0x1b7/0x7d4 [ 31.150456] [ 31.150693] Last potentially related work creation: [ 31.151319] kasan_save_stack+0x22/0x50 [ 31.151856] __kasan_record_aux_stack+0x8e/0xa0 [ 31.152469] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.153171] remove_vma+0x139/0x170 [ 31.153657] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.154253] do_vmi_munmap+0x1f1/0x2b0 [ 31.154775] __vm_munmap+0x138/0x3a0 [ 31.155270] __x64_sys_munmap+0x59/0x80 [ 31.155807] do_syscall_64+0x3f/0x90 [ 31.156315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.157011] [ 31.157245] The buggy address belongs to the object at ffff88800683a488 [ 31.157245] which belongs to the cache vm_area_struct of size 168 [ 31.158821] The buggy address is located 88 bytes inside of [ 31.158821] freed 168-byte region [ffff88800683a488, ffff88800683a530) [ 31.160377] [ 31.160617] The buggy address belongs to the physical page: [ 31.161357] page:00000000f291ddd8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x683a [ 31.162553] memcg:ffff888018bff301 [ 31.163021] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.163730] page_type: 0xffffffff() [ 31.164229] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.165256] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018bff301 [ 31.166261] page dumped because: kasan: bad access detected [ 31.166995] [ 31.167231] Memory state around the buggy address: [ 31.167881] ffff88800683a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.168830] ffff88800683a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.169790] >ffff88800683a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.170731] ^ [ 31.171564] ffff88800683a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.172504] ffff88800683a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.173448] ================================================================== [ 31.174871] Disabling lock debugging due to kernel taint [ 33.781521] BUG: Bad rss-counter state mm:00000000938c6a80 type:MM_FILEPAGES val:33 [ 33.782761] BUG: Bad rss-counter state mm:00000000938c6a80 type:MM_ANONPAGES val:22 [ 34.267775] BUG: Bad rss-counter state mm:00000000d9f154ab type:MM_FILEPAGES val:33 [ 34.269070] BUG: Bad rss-counter state mm:00000000d9f154ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57554' (ECDSA) to the list of known hosts. 2023/06/21 00:19:07 fuzzer started 2023/06/21 00:19:07 dialing manager at localhost:36067 2023/06/21 00:19:07 checking machine... 2023/06/21 00:19:07 checking revisions... [ 34.920927] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:19:08 testing simple program... [ 34.965581] cgroup: Unknown subsys name 'net' [ 35.025205] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:19:07 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=00007ffd82dfe4f8 CR3=000000000692c000 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=2037303a39313a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a39313a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8363b742 RDX=00000000000263b7 RSI=00000000000263b7 RDI=ffffffff865828cc RBP=ffff8880165bf920 RSP=ffff8880165bf858 R8 =0000000000000000 R9 =ffff8880165bf908 R10=0000000000038001 R11=000000000008a95e R12=ffff8880165bf928 R13=ffff8880165bf910 R14=ffff8880165bf909 R15=ffff8880165bf8c8 RIP=ffffffff8113077a RFL=00000213 [----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 00007ff3d2159900 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=00007ff3d2710618 CR3=00000000068a0000 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=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