syzkaller login: [ 32.199213] BUG: Bad rss-counter state mm:00000000bb2ad07a type:MM_FILEPAGES val:33 [ 32.200607] BUG: Bad rss-counter state mm:00000000bb2ad07a type:MM_ANONPAGES val:22 [ 32.245652] ================================================================== [ 32.246865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.248086] Read of size 8 at addr ffff88800e0b5058 by task sshd/220 [ 32.249091] [ 32.249376] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.250508] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.251770] Call Trace: [ 32.252191] [ 32.252559] dump_stack_lvl+0x91/0xf0 [ 32.253213] print_report+0xcc/0x620 [ 32.253846] ? __virt_addr_valid+0x102/0x340 [ 32.254592] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.255425] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.256264] kasan_report+0xbe/0xf0 [ 32.256915] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.257763] vma_interval_tree_remove+0xc75/0xec0 [ 32.258589] vma_prepare+0xc54/0x11a0 [ 32.259239] __split_vma+0x5af/0x950 [ 32.259883] ? __pfx___split_vma+0x10/0x10 [ 32.260603] ? find_held_lock+0x2c/0x110 [ 32.261303] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.262076] ? lock_is_held_type+0x9f/0x120 [ 32.262737] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.263374] ? mtree_range_walk+0x632/0x900 [ 32.263941] ? mas_walk+0x5c7/0x7c0 [ 32.264429] do_vmi_munmap+0x1f1/0x2b0 [ 32.264932] mmap_region+0x1f9/0x2660 [ 32.265421] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.265953] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.266711] ? __pfx_lock_acquire+0x10/0x10 [ 32.267254] ? __pfx_mmap_region+0x10/0x10 [ 32.267800] ? security_mmap_addr+0x7d/0xa0 [ 32.268337] ? get_unmapped_area+0x1f5/0x3f0 [ 32.268910] do_mmap+0x854/0xf00 [ 32.269357] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.269871] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.270456] ksys_mmap_pgoff+0x3af/0x500 [ 32.270967] do_syscall_64+0x3f/0x90 [ 32.271452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.272118] RIP: 0033:0x7fd0794d9d82 [ 32.272593] 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 [ 32.274781] RSP: 002b:00007fff52c53928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.275716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0794d9d82 [ 32.276597] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd078913000 [ 32.277467] RBP: 00007fd078913000 R08: 0000000000000009 R09: 0000000000001000 [ 32.278357] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a526268ec0 [ 32.279229] R13: 00007fff52c53940 R14: 00007fff52c53970 R15: 00007fff52c53cd0 [ 32.280100] [ 32.280399] [ 32.280617] Allocated by task 213: [ 32.281046] kasan_save_stack+0x22/0x50 [ 32.281555] kasan_set_track+0x25/0x30 [ 32.282051] __kasan_slab_alloc+0x59/0x70 [ 32.282579] kmem_cache_alloc+0x16b/0x370 [ 32.283106] vm_area_dup+0x20/0x160 [ 32.283569] __split_vma+0x170/0x950 [ 32.284037] split_vma+0xc6/0x110 [ 32.284481] mprotect_fixup+0x8d2/0xb30 [ 32.284994] do_mprotect_pkey+0x87e/0xd40 [ 32.285514] __x64_sys_mprotect+0x78/0xc0 [ 32.286040] do_syscall_64+0x3f/0x90 [ 32.286538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.287189] [ 32.287409] Freed by task 213: [ 32.287807] kasan_save_stack+0x22/0x50 [ 32.288314] kasan_set_track+0x25/0x30 [ 32.288816] kasan_save_free_info+0x2b/0x50 [ 32.289353] __kasan_slab_free+0x10a/0x190 [ 32.289895] kmem_cache_free+0x10d/0x4d0 [ 32.290427] rcu_core+0x8c8/0x2860 [ 32.290884] __do_softirq+0x1b7/0x7d4 [ 32.291368] [ 32.291591] Last potentially related work creation: [ 32.292185] kasan_save_stack+0x22/0x50 [ 32.292699] __kasan_record_aux_stack+0x8e/0xa0 [ 32.293284] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.293940] remove_vma+0x139/0x170 [ 32.294418] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.294984] do_vmi_munmap+0x1f1/0x2b0 [ 32.295478] __vm_munmap+0x138/0x3a0 [ 32.295952] __x64_sys_munmap+0x59/0x80 [ 32.296454] do_syscall_64+0x3f/0x90 [ 32.296936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.297580] [ 32.297801] The buggy address belongs to the object at ffff88800e0b5000 [ 32.297801] which belongs to the cache vm_area_struct of size 168 [ 32.299335] The buggy address is located 88 bytes inside of [ 32.299335] freed 168-byte region [ffff88800e0b5000, ffff88800e0b50a8) [ 32.300766] [ 32.300982] The buggy address belongs to the physical page: [ 32.301662] page:00000000defaf68b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0b5 [ 32.302779] memcg:ffff88800d00be01 [ 32.303213] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.303873] page_type: 0xffffffff() [ 32.304344] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.305287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d00be01 [ 32.306225] page dumped because: kasan: bad access detected [ 32.306907] [ 32.307123] Memory state around the buggy address: [ 32.307719] ffff88800e0b4f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.308598] ffff88800e0b4f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.309480] >ffff88800e0b5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.310351] ^ [ 32.311132] ffff88800e0b5080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.312032] ffff88800e0b5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.312900] ================================================================== [ 32.314347] Disabling lock debugging due to kernel taint [ 34.656246] BUG: Bad rss-counter state mm:0000000037577aff type:MM_FILEPAGES val:33 [ 34.656996] BUG: Bad rss-counter state mm:0000000037577aff type:MM_ANONPAGES val:22 [ 35.052770] BUG: Bad rss-counter state mm:00000000afa9d37d type:MM_FILEPAGES val:33 [ 35.054079] BUG: Bad rss-counter state mm:00000000afa9d37d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28839' (ECDSA) to the list of known hosts. 2023/06/21 05:36:53 fuzzer started 2023/06/21 05:36:54 dialing manager at localhost:36067 2023/06/21 05:36:54 checking machine... 2023/06/21 05:36:54 checking revisions... [ 35.696177] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:36:54 testing simple program... [ 35.742922] cgroup: Unknown subsys name 'net' [ 35.774211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:36:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880160bbdc0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000003 RSP=ffff88801cdafaa0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff87f97640 R13=ffff8880160bbdc0 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff812d8e64 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 00007f3be53b3900 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=00007ffee1b05000 CR3=000000000eab4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffff888008c04400 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=00007f6b23123040 CR3=000000000e798000 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=2033353a36333a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a36333a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000