syzkaller login: [ 53.077747] BUG: Bad rss-counter state mm:00000000ff7a7da7 type:MM_FILEPAGES val:33 [ 53.078362] BUG: Bad rss-counter state mm:00000000ff7a7da7 type:MM_ANONPAGES val:22 [ 53.248563] ================================================================== [ 53.249609] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.250661] Read of size 8 at addr ffff88800e2be6b0 by task sshd/219 [ 53.251513] [ 53.251896] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 53.252843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.253928] Call Trace: [ 53.254283] [ 53.254607] dump_stack_lvl+0x91/0xf0 [ 53.255153] print_report+0xcc/0x620 [ 53.255692] ? __virt_addr_valid+0x102/0x340 [ 53.256308] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.256997] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.257682] kasan_report+0xbe/0xf0 [ 53.258243] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.258985] vma_interval_tree_remove+0xc75/0xec0 [ 53.259696] vma_prepare+0xc54/0x11a0 [ 53.260258] __split_vma+0x5af/0x950 [ 53.260816] ? __pfx___split_vma+0x10/0x10 [ 53.261441] ? find_held_lock+0x2c/0x110 [ 53.262055] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.262736] ? lock_is_held_type+0x9f/0x120 [ 53.263373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.264087] ? mtree_range_walk+0x632/0x900 [ 53.264735] ? mas_walk+0x5c7/0x7c0 [ 53.265298] do_vmi_munmap+0x1f1/0x2b0 [ 53.265875] mmap_region+0x1f9/0x2660 [ 53.266444] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.267031] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.267858] ? __pfx_lock_acquire+0x10/0x10 [ 53.268468] ? __pfx_mmap_region+0x10/0x10 [ 53.269087] ? security_mmap_addr+0x7d/0xa0 [ 53.269690] ? get_unmapped_area+0x1f5/0x3f0 [ 53.270321] do_mmap+0x854/0xf00 [ 53.270847] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.271417] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.272063] ksys_mmap_pgoff+0x3af/0x500 [ 53.272644] do_syscall_64+0x3f/0x90 [ 53.273191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.273930] RIP: 0033:0x7f1769e2bd82 [ 53.274451] 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 [ 53.276866] RSP: 002b:00007ffe078ed6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.277875] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1769e2bd82 [ 53.278867] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1769265000 [ 53.279811] RBP: 00007f1769265000 R08: 0000000000000009 R09: 0000000000001000 [ 53.280778] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1d1e9fd90 [ 53.281728] R13: 00007ffe078ed700 R14: 00007ffe078ed730 R15: 00007ffe078eda90 [ 53.282710] [ 53.283042] [ 53.283287] Allocated by task 212: [ 53.283777] kasan_save_stack+0x22/0x50 [ 53.284353] kasan_set_track+0x25/0x30 [ 53.284920] __kasan_slab_alloc+0x59/0x70 [ 53.285516] kmem_cache_alloc+0x16b/0x370 [ 53.286111] vm_area_dup+0x20/0x160 [ 53.286651] __split_vma+0x170/0x950 [ 53.287189] split_vma+0xc6/0x110 [ 53.287694] mprotect_fixup+0x8d2/0xb30 [ 53.288270] do_mprotect_pkey+0x87e/0xd40 [ 53.288866] __x64_sys_mprotect+0x78/0xc0 [ 53.289466] do_syscall_64+0x3f/0x90 [ 53.290010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.290752] [ 53.290999] Freed by task 212: [ 53.291453] kasan_save_stack+0x22/0x50 [ 53.292034] kasan_set_track+0x25/0x30 [ 53.292604] kasan_save_free_info+0x2b/0x50 [ 53.293317] __kasan_slab_free+0x10a/0x190 [ 53.293932] kmem_cache_free+0x10d/0x4d0 [ 53.294533] rcu_core+0x8c8/0x2860 [ 53.295047] __do_softirq+0x1b7/0x7d4 [ 53.295595] [ 53.295846] Last potentially related work creation: [ 53.296521] kasan_save_stack+0x22/0x50 [ 53.297104] __kasan_record_aux_stack+0x8e/0xa0 [ 53.297761] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.298507] remove_vma+0x139/0x170 [ 53.299029] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.299671] do_vmi_munmap+0x1f1/0x2b0 [ 53.300231] __vm_munmap+0x138/0x3a0 [ 53.300768] __x64_sys_munmap+0x59/0x80 [ 53.301343] do_syscall_64+0x3f/0x90 [ 53.301889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.302635] [ 53.302884] Second to last potentially related work creation: [ 53.303664] kasan_save_stack+0x22/0x50 [ 53.304246] __kasan_record_aux_stack+0x8e/0xa0 [ 53.304907] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.305649] remove_vma+0x139/0x170 [ 53.306170] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.306821] do_vmi_munmap+0x1f1/0x2b0 [ 53.307377] mmap_region+0x1f9/0x2660 [ 53.307925] do_mmap+0x854/0xf00 [ 53.308415] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.308977] ksys_mmap_pgoff+0x3af/0x500 [ 53.309551] do_syscall_64+0x3f/0x90 [ 53.310090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.310830] [ 53.311075] The buggy address belongs to the object at ffff88800e2be658 [ 53.311075] which belongs to the cache vm_area_struct of size 168 [ 53.312761] The buggy address is located 88 bytes inside of [ 53.312761] freed 168-byte region [ffff88800e2be658, ffff88800e2be700) [ 53.314375] [ 53.314643] The buggy address belongs to the physical page: [ 53.315403] page:00000000fd98f12a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2be [ 53.316665] memcg:ffff88800dfad201 [ 53.317155] flags: 0x100000000000200(slab|node=0|zone=1) [ 53.317906] page_type: 0xffffffff() [ 53.318429] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3d00 dead000000000004 [ 53.319488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfad201 [ 53.320527] page dumped because: kasan: bad access detected [ 53.321285] [ 53.321532] Memory state around the buggy address: [ 53.322199] ffff88800e2be580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.323208] ffff88800e2be600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 53.324199] >ffff88800e2be680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.325184] ^ [ 53.325862] ffff88800e2be700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 53.326858] ffff88800e2be780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 53.327843] ================================================================== [ 53.328888] Disabling lock debugging due to kernel taint [ 55.623271] BUG: Bad rss-counter state mm:00000000facaf490 type:MM_FILEPAGES val:33 [ 55.624813] BUG: Bad rss-counter state mm:00000000facaf490 type:MM_ANONPAGES val:22 [ 56.083692] BUG: Bad rss-counter state mm:00000000e704d8b2 type:MM_FILEPAGES val:33 [ 56.084700] BUG: Bad rss-counter state mm:00000000e704d8b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6371' (ECDSA) to the list of known hosts. 2023/06/19 11:52:14 fuzzer started 2023/06/19 11:52:14 dialing manager at localhost:44161 2023/06/19 11:52:15 checking machine... 2023/06/19 11:52:15 checking revisions... [ 56.803361] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:52:15 testing simple program... [ 56.834822] cgroup: Unknown subsys name 'net' [ 56.882233] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:51:52 Registers: info registers vcpu 0 RAX=00000000001362ff RBX=0000000000000058 RCX=0000000000000100 RDX=0000000000001000 RSI=fffffffffffff000 RDI=00007f6b67223cf0 RBP=0000000000000006 RSP=00007fff954a6220 R8 =0000000000800000 R9 =0000000000136250 R10=0000000000000002 R11=0000000000018e66 R12=000055cf974d4290 R13=00007fff954a6338 R14=00000000001362a8 R15=0000000000137000 RIP=00007f6b67156c93 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6b665d3900 00000000 00000000 GS =0000 0000000000000000 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=00007f6b659daa20 CR3=000000000c738000 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=e2a1243a1e5ba1a71a4a8ac29da12b2b XMM02=ec2efd57dc4c00df000000000011c620 XMM03=dbffdaaecb657635000000000011c6f0 XMM04=58873f490c4a31d700000000000ae988 XMM05=106cec3dd9b0f0350000000000135fb8 XMM06=db4185f2f91e25de0000000000134d58 XMM07=fb795ef6d65770560000000000123fd8 XMM08=2c67c8bc2e329bc3000000000011c690 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85d3d00c RCX=ffffffff812d869a RDX=1ffff11003603343 RSI=0000000000000008 RDI=0000000000000000 RBP=ffff88801b0199b0 RSP=ffff88801463f9b8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88801b0199b8 R13=ffff88801b019a18 R14=0000000000000000 R15=00007ff4d5028000 RIP=ffffffff812bdda9 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 00007ff4d503c900 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=00007ff4d4ffc008 CR3=00000000147e6000 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=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