syzkaller login: [ 31.010378] BUG: Bad rss-counter state mm:00000000ed600d44 type:MM_FILEPAGES val:33 [ 31.011152] BUG: Bad rss-counter state mm:00000000ed600d44 type:MM_ANONPAGES val:22 [ 31.123664] ================================================================== [ 31.124790] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.125869] Read of size 8 at addr ffff88800c551d08 by task sshd/221 [ 31.126284] [ 31.126402] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.126866] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.127390] Call Trace: [ 31.127564] [ 31.127724] dump_stack_lvl+0x91/0xf0 [ 31.127998] print_report+0xcc/0x620 [ 31.128261] ? __virt_addr_valid+0x102/0x340 [ 31.128558] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.128895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.129239] kasan_report+0xbe/0xf0 [ 31.129511] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.129859] vma_interval_tree_remove+0xc75/0xec0 [ 31.130188] vma_prepare+0xc54/0x11a0 [ 31.130449] __split_vma+0x5af/0x950 [ 31.130705] ? __pfx___split_vma+0x10/0x10 [ 31.130990] ? find_held_lock+0x2c/0x110 [ 31.131276] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.131579] ? lock_is_held_type+0x9f/0x120 [ 31.131872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.132197] ? mtree_range_walk+0x632/0x900 [ 31.132498] ? mas_walk+0x5c7/0x7c0 [ 31.132776] do_vmi_munmap+0x1f1/0x2b0 [ 31.133052] mmap_region+0x1f9/0x2660 [ 31.133338] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.133644] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.134055] ? __pfx_lock_acquire+0x10/0x10 [ 31.134359] ? __pfx_mmap_region+0x10/0x10 [ 31.134657] ? security_mmap_addr+0x7d/0xa0 [ 31.134962] ? get_unmapped_area+0x1f5/0x3f0 [ 31.135274] do_mmap+0x854/0xf00 [ 31.135529] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.135809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.136129] ksys_mmap_pgoff+0x3af/0x500 [ 31.136415] do_syscall_64+0x3f/0x90 [ 31.136693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137059] RIP: 0033:0x7ff5adbfdd82 [ 31.137334] 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 [ 31.138563] RSP: 002b:00007fffeb5e9678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.139067] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5adbfdd82 [ 31.139549] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff5ad037000 [ 31.140021] RBP: 00007ff5ad037000 R08: 0000000000000009 R09: 0000000000001000 [ 31.140492] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecfef8af70 [ 31.140963] R13: 00007fffeb5e9690 R14: 00007fffeb5e96c0 R15: 00007fffeb5e9a20 [ 31.141454] [ 31.141635] [ 31.141759] Allocated by task 214: [ 31.142000] kasan_save_stack+0x22/0x50 [ 31.142279] kasan_set_track+0x25/0x30 [ 31.142548] __kasan_slab_alloc+0x59/0x70 [ 31.142862] kmem_cache_alloc+0x16b/0x370 [ 31.143168] vm_area_dup+0x20/0x160 [ 31.143419] __split_vma+0x170/0x950 [ 31.143674] split_vma+0xc6/0x110 [ 31.143915] mprotect_fixup+0x8d2/0xb30 [ 31.144194] do_mprotect_pkey+0x87e/0xd40 [ 31.144490] __x64_sys_mprotect+0x78/0xc0 [ 31.144781] do_syscall_64+0x3f/0x90 [ 31.145044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.145410] [ 31.145549] Freed by task 214: [ 31.145769] kasan_save_stack+0x22/0x50 [ 31.146049] kasan_set_track+0x25/0x30 [ 31.146325] kasan_save_free_info+0x2b/0x50 [ 31.146624] __kasan_slab_free+0x10a/0x190 [ 31.146926] kmem_cache_free+0x10d/0x4d0 [ 31.147211] rcu_core+0x8c8/0x2860 [ 31.147461] __do_softirq+0x1b7/0x7d4 [ 31.147727] [ 31.147846] Last potentially related work creation: [ 31.148179] kasan_save_stack+0x22/0x50 [ 31.148464] __kasan_record_aux_stack+0x8e/0xa0 [ 31.148780] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.149144] remove_vma+0x139/0x170 [ 31.149408] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.149737] do_vmi_munmap+0x1f1/0x2b0 [ 31.150015] __vm_munmap+0x138/0x3a0 [ 31.150275] __x64_sys_munmap+0x59/0x80 [ 31.150553] do_syscall_64+0x3f/0x90 [ 31.150816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.151174] [ 31.151295] Second to last potentially related work creation: [ 31.151683] kasan_save_stack+0x22/0x50 [ 31.151964] __kasan_record_aux_stack+0x8e/0xa0 [ 31.152283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.152642] remove_vma+0x139/0x170 [ 31.152899] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.153215] do_vmi_munmap+0x1f1/0x2b0 [ 31.153505] mmap_region+0x1f9/0x2660 [ 31.153784] do_mmap+0x854/0xf00 [ 31.154024] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.154294] ksys_mmap_pgoff+0x3af/0x500 [ 31.154576] do_syscall_64+0x3f/0x90 [ 31.154844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.155204] [ 31.155324] The buggy address belongs to the object at ffff88800c551cb0 [ 31.155324] which belongs to the cache vm_area_struct of size 168 [ 31.156173] The buggy address is located 88 bytes inside of [ 31.156173] freed 168-byte region [ffff88800c551cb0, ffff88800c551d58) [ 31.156966] [ 31.157087] The buggy address belongs to the physical page: [ 31.157466] page:0000000043513293 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c5519f8 pfn:0xc551 [ 31.158153] memcg:ffff88800d65f801 [ 31.158396] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.158763] page_type: 0xffffffff() [ 31.159018] raw: 0100000000000200 ffff8880087a0c80 ffffea0000316890 ffffea000025ed90 [ 31.159556] raw: ffff88800c5519f8 000000000011000b 00000001ffffffff ffff88800d65f801 [ 31.160064] page dumped because: kasan: bad access detected [ 31.160434] [ 31.160554] Memory state around the buggy address: [ 31.160879] ffff88800c551c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.161360] ffff88800c551c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.161840] >ffff88800c551d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.162316] ^ [ 31.162565] ffff88800c551d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.163040] ffff88800c551e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.163534] ================================================================== [ 31.164067] Disabling lock debugging due to kernel taint [ 32.960131] BUG: Bad rss-counter state mm:00000000920087eb type:MM_FILEPAGES val:33 [ 32.960814] BUG: Bad rss-counter state mm:00000000920087eb type:MM_ANONPAGES val:22 [ 33.366574] BUG: Bad rss-counter state mm:0000000022e39b01 type:MM_FILEPAGES val:33 [ 33.367288] BUG: Bad rss-counter state mm:0000000022e39b01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21151' (ECDSA) to the list of known hosts. 2023/06/21 03:41:12 fuzzer started 2023/06/21 03:41:12 dialing manager at localhost:36067 2023/06/21 03:41:12 checking machine... 2023/06/21 03:41:12 checking revisions... [ 34.085397] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:41:12 testing simple program... [ 34.131699] cgroup: Unknown subsys name 'net' [ 34.175593] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:41:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f0e7aaf6477 RCX=0000000000000000 RDX=ffff88801031d1c0 RSI=00007f0e7aaf6477 RDI=ffffffff85652b60 RBP=00007f0e7aaf6477 RSP=ffff88801c93f958 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88801c93fa70 R13=0000000000000000 R14=ffff88801031d1c0 R15=0000000000000cc0 RIP=ffffffff814c8456 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 00007f0e7a603900 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=00007f0e7abba618 CR3=000000001c984000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f33f23c7dc0 CR3=0000000016dc8000 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=2032313a31343a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a31343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000