syzkaller login: [ 30.840451] BUG: Bad rss-counter state mm:00000000747bab88 type:MM_FILEPAGES val:33 [ 30.841537] BUG: Bad rss-counter state mm:00000000747bab88 type:MM_ANONPAGES val:22 [ 30.999246] ================================================================== [ 31.000222] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.001207] Read of size 8 at addr ffff888017f8f310 by task sshd/221 [ 31.002163] [ 31.002404] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.003368] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.004415] Call Trace: [ 31.004774] [ 31.005077] dump_stack_lvl+0x91/0xf0 [ 31.005612] print_report+0xcc/0x620 [ 31.006139] ? __virt_addr_valid+0x102/0x340 [ 31.006728] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.007385] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.008030] kasan_report+0xbe/0xf0 [ 31.008516] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.009177] vma_interval_tree_remove+0xc75/0xec0 [ 31.009877] vma_prepare+0xc54/0x11a0 [ 31.010384] __split_vma+0x5af/0x950 [ 31.010898] ? __pfx___split_vma+0x10/0x10 [ 31.011501] ? find_held_lock+0x2c/0x110 [ 31.012050] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.012633] ? lock_is_held_type+0x9f/0x120 [ 31.013213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.013856] ? mtree_range_walk+0x632/0x900 [ 31.014450] ? mas_walk+0x5c7/0x7c0 [ 31.014957] do_vmi_munmap+0x1f1/0x2b0 [ 31.015511] mmap_region+0x1f9/0x2660 [ 31.016029] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.016565] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.017306] ? __pfx_lock_acquire+0x10/0x10 [ 31.017886] ? __pfx_mmap_region+0x10/0x10 [ 31.018454] ? security_mmap_addr+0x7d/0xa0 [ 31.019017] ? get_unmapped_area+0x1f5/0x3f0 [ 31.019617] do_mmap+0x854/0xf00 [ 31.020101] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.020623] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.021195] ksys_mmap_pgoff+0x3af/0x500 [ 31.021723] do_syscall_64+0x3f/0x90 [ 31.022250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.022935] RIP: 0033:0x7f152f1cbd82 [ 31.023432] 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 [ 31.025624] RSP: 002b:00007ffcd3f7a348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.026587] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f152f1cbd82 [ 31.027484] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f152e605000 [ 31.028359] RBP: 00007f152e605000 R08: 0000000000000009 R09: 0000000000001000 [ 31.029274] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ee742cd90 [ 31.030193] R13: 00007ffcd3f7a360 R14: 00007ffcd3f7a390 R15: 00007ffcd3f7a6f0 [ 31.031120] [ 31.031457] [ 31.031677] Allocated by task 214: [ 31.032149] kasan_save_stack+0x22/0x50 [ 31.032690] kasan_set_track+0x25/0x30 [ 31.033205] __kasan_slab_alloc+0x59/0x70 [ 31.033786] kmem_cache_alloc+0x16b/0x370 [ 31.034335] vm_area_dup+0x20/0x160 [ 31.034821] __split_vma+0x170/0x950 [ 31.035312] split_vma+0xc6/0x110 [ 31.035788] mprotect_fixup+0x8d2/0xb30 [ 31.036304] do_mprotect_pkey+0x87e/0xd40 [ 31.036853] __x64_sys_mprotect+0x78/0xc0 [ 31.037393] do_syscall_64+0x3f/0x90 [ 31.037920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038603] [ 31.038840] Freed by task 214: [ 31.039241] kasan_save_stack+0x22/0x50 [ 31.039795] kasan_set_track+0x25/0x30 [ 31.040310] kasan_save_free_info+0x2b/0x50 [ 31.040878] __kasan_slab_free+0x10a/0x190 [ 31.041436] kmem_cache_free+0x10d/0x4d0 [ 31.042004] rcu_core+0x8c8/0x2860 [ 31.042479] __do_softirq+0x1b7/0x7d4 [ 31.043000] [ 31.043232] Last potentially related work creation: [ 31.043866] kasan_save_stack+0x22/0x50 [ 31.044401] __kasan_record_aux_stack+0x8e/0xa0 [ 31.045010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.045676] remove_vma+0x139/0x170 [ 31.046174] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.046764] do_vmi_munmap+0x1f1/0x2b0 [ 31.047274] __vm_munmap+0x138/0x3a0 [ 31.047809] __x64_sys_munmap+0x59/0x80 [ 31.048347] do_syscall_64+0x3f/0x90 [ 31.048860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049528] [ 31.049788] The buggy address belongs to the object at ffff888017f8f2b8 [ 31.049788] which belongs to the cache vm_area_struct of size 168 [ 31.051372] The buggy address is located 88 bytes inside of [ 31.051372] freed 168-byte region [ffff888017f8f2b8, ffff888017f8f360) [ 31.052864] [ 31.053090] The buggy address belongs to the physical page: [ 31.053791] page:000000002f1e801b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f8f [ 31.054952] memcg:ffff88800e43fd01 [ 31.055405] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.056108] page_type: 0xffffffff() [ 31.056565] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.057551] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e43fd01 [ 31.058512] page dumped because: kasan: bad access detected [ 31.059235] [ 31.059489] Memory state around the buggy address: [ 31.060118] ffff888017f8f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.061018] ffff888017f8f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.061931] >ffff888017f8f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.062820] ^ [ 31.063304] ffff888017f8f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.064217] ffff888017f8f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.065096] ================================================================== [ 31.066145] Disabling lock debugging due to kernel taint [ 32.963813] BUG: Bad rss-counter state mm:000000002ebd1298 type:MM_FILEPAGES val:33 [ 32.964647] BUG: Bad rss-counter state mm:000000002ebd1298 type:MM_ANONPAGES val:22 [ 33.357444] BUG: Bad rss-counter state mm:000000007e8ca5b6 type:MM_FILEPAGES val:33 [ 33.358224] BUG: Bad rss-counter state mm:000000007e8ca5b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57969' (ECDSA) to the list of known hosts. 2023/06/21 03:38:07 fuzzer started 2023/06/21 03:38:07 dialing manager at localhost:36067 2023/06/21 03:38:07 checking machine... 2023/06/21 03:38:07 checking revisions... [ 34.003984] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:38:07 testing simple program... [ 34.053469] cgroup: Unknown subsys name 'net' [ 34.113904] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:38:06 Registers: info registers vcpu 0 RAX=ffffed100206f8a6 RBX=ffff88801037c528 RCX=ffffffff812e0126 RDX=ffffed100206f8a6 RSI=0000000000000004 RDI=ffff88801037c528 RBP=ffffed100206f8a5 RSP=ffff8880167bf808 R8 =0000000000000001 R9 =ffffed100206f8a5 R10=ffff88801037c52b R11=00000000000b6a61 R12=ffff88801037c530 R13=ffff88801037c538 R14=0000000000000001 R15=0000000000000014 RIP=ffffffff8180f12f RFL=00000046 [---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 00007f9c343c0900 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=00007ffc04a38000 CR3=000000000e5ba000 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=563412feff00545000000000000080fe 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=ffffea00006fa648 RBX=000000000000000b RCX=ffff88806cf40190 RDX=ffffea00006fa688 RSI=ffffea00006fa688 RDI=ffff88806cf40198 RBP=0000000000000000 RSP=ffff88806cf09cd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000000000001bea5 R12=0000000000000001 R13=dffffc0000000000 R14=ffffea00006fa640 R15=ffff88806cf40140 RIP=ffffffff8178b8e2 RFL=00000046 [---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 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=00007f0b78ae3540 CR3=000000000c948000 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=6bc1a4d6f6be5aa84a4ff8ba16566cf1 XMM02=2c67c8bc2e329bc3000000000011d738 XMM03=fb795ef6d65770560000000000121dc8 XMM04=fc91fb7ccf4a8ad600000000000ae988 XMM05=59d5b690e0af863b0000000000131b88 XMM06=adc842d434616b6500000000001309f0 XMM07=e042d86d42eb936e0000000000122048 XMM08=cf3180b3fe5e1ad5000000000011d798 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000