syzkaller login: [ 31.156641] BUG: Bad rss-counter state mm:00000000726affce type:MM_FILEPAGES val:33 [ 31.158095] BUG: Bad rss-counter state mm:00000000726affce type:MM_ANONPAGES val:22 [ 31.273466] ================================================================== [ 31.274428] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.275378] Read of size 8 at addr ffff88800e5cf058 by task sshd/220 [ 31.276262] [ 31.276572] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.277455] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.278460] Call Trace: [ 31.278803] [ 31.279093] dump_stack_lvl+0x91/0xf0 [ 31.279595] print_report+0xcc/0x620 [ 31.280150] ? __virt_addr_valid+0x102/0x340 [ 31.280725] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.281379] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.282019] kasan_report+0xbe/0xf0 [ 31.282500] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.283127] vma_interval_tree_remove+0xc75/0xec0 [ 31.283766] vma_prepare+0xc54/0x11a0 [ 31.284285] __split_vma+0x5af/0x950 [ 31.284760] ? __pfx___split_vma+0x10/0x10 [ 31.285292] ? find_held_lock+0x2c/0x110 [ 31.285841] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.286409] ? lock_is_held_type+0x9f/0x120 [ 31.286959] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.287585] ? mtree_range_walk+0x632/0x900 [ 31.288198] ? mas_walk+0x5c7/0x7c0 [ 31.288691] do_vmi_munmap+0x1f1/0x2b0 [ 31.289190] mmap_region+0x1f9/0x2660 [ 31.289672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.290203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.290957] ? __pfx_lock_acquire+0x10/0x10 [ 31.291491] ? __pfx_mmap_region+0x10/0x10 [ 31.292053] ? security_mmap_addr+0x7d/0xa0 [ 31.292603] ? get_unmapped_area+0x1f5/0x3f0 [ 31.293158] do_mmap+0x854/0xf00 [ 31.293605] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.294110] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.294671] ksys_mmap_pgoff+0x3af/0x500 [ 31.295195] do_syscall_64+0x3f/0x90 [ 31.295677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296387] RIP: 0033:0x7f0f41e13d82 [ 31.296846] 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 [ 31.299012] RSP: 002b:00007ffea19e53b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.299973] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f41e13d82 [ 31.300870] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f4124d000 [ 31.301720] RBP: 00007f0f4124d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.302599] R10: 0000000000000812 R11: 0000000000000206 R12: 000056145c26aec0 [ 31.303465] R13: 00007ffea19e53d0 R14: 00007ffea19e5400 R15: 00007ffea19e5760 [ 31.304362] [ 31.304656] [ 31.304876] Allocated by task 213: [ 31.305320] kasan_save_stack+0x22/0x50 [ 31.305830] kasan_set_track+0x25/0x30 [ 31.306332] __kasan_slab_alloc+0x59/0x70 [ 31.306968] kmem_cache_alloc+0x16b/0x370 [ 31.307496] vm_area_dup+0x20/0x160 [ 31.307994] __split_vma+0x170/0x950 [ 31.308472] split_vma+0xc6/0x110 [ 31.308911] mprotect_fixup+0x8d2/0xb30 [ 31.309424] do_mprotect_pkey+0x87e/0xd40 [ 31.309947] __x64_sys_mprotect+0x78/0xc0 [ 31.310472] do_syscall_64+0x3f/0x90 [ 31.310950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.311596] [ 31.311818] Freed by task 213: [ 31.312230] kasan_save_stack+0x22/0x50 [ 31.312760] kasan_set_track+0x25/0x30 [ 31.313257] kasan_save_free_info+0x2b/0x50 [ 31.313805] __kasan_slab_free+0x10a/0x190 [ 31.314341] kmem_cache_free+0x10d/0x4d0 [ 31.314853] rcu_core+0x8c8/0x2860 [ 31.315297] __do_softirq+0x1b7/0x7d4 [ 31.315783] [ 31.316033] Last potentially related work creation: [ 31.316628] kasan_save_stack+0x22/0x50 [ 31.317143] __kasan_record_aux_stack+0x8e/0xa0 [ 31.317724] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.318445] remove_vma+0x139/0x170 [ 31.318908] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.319473] do_vmi_munmap+0x1f1/0x2b0 [ 31.319974] __vm_munmap+0x138/0x3a0 [ 31.320457] __x64_sys_munmap+0x59/0x80 [ 31.320957] do_syscall_64+0x3f/0x90 [ 31.321441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.322091] [ 31.322307] Second to last potentially related work creation: [ 31.323016] kasan_save_stack+0x22/0x50 [ 31.323532] __kasan_record_aux_stack+0x8e/0xa0 [ 31.324145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.324805] remove_vma+0x139/0x170 [ 31.325265] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.325823] do_vmi_munmap+0x1f1/0x2b0 [ 31.326310] mmap_region+0x1f9/0x2660 [ 31.326802] do_mmap+0x854/0xf00 [ 31.327239] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.327743] ksys_mmap_pgoff+0x3af/0x500 [ 31.328287] do_syscall_64+0x3f/0x90 [ 31.328765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.329428] [ 31.329652] The buggy address belongs to the object at ffff88800e5cf000 [ 31.329652] which belongs to the cache vm_area_struct of size 168 [ 31.331148] The buggy address is located 88 bytes inside of [ 31.331148] freed 168-byte region [ffff88800e5cf000, ffff88800e5cf0a8) [ 31.332595] [ 31.332833] The buggy address belongs to the physical page: [ 31.333494] page:0000000086115620 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5cf [ 31.334590] memcg:ffff88800ee3f401 [ 31.335019] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.335683] page_type: 0xffffffff() [ 31.336180] raw: 0100000000000200 ffff8880087a0c80 ffffea0000231e80 dead000000000004 [ 31.337120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee3f401 [ 31.338034] page dumped because: kasan: bad access detected [ 31.338702] [ 31.338921] Memory state around the buggy address: [ 31.339499] ffff88800e5cef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.340384] ffff88800e5cef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.341246] >ffff88800e5cf000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.342127] ^ [ 31.342874] ffff88800e5cf080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.343733] ffff88800e5cf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.344643] ================================================================== [ 31.345713] Disabling lock debugging due to kernel taint [ 33.326590] BUG: Bad rss-counter state mm:00000000ca1a2329 type:MM_FILEPAGES val:33 [ 33.327659] BUG: Bad rss-counter state mm:00000000ca1a2329 type:MM_ANONPAGES val:22 [ 33.804940] BUG: Bad rss-counter state mm:0000000058cba154 type:MM_FILEPAGES val:33 [ 33.806106] BUG: Bad rss-counter state mm:0000000058cba154 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27488' (ECDSA) to the list of known hosts. 2023/06/21 01:50:54 fuzzer started 2023/06/21 01:50:55 dialing manager at localhost:36067 2023/06/21 01:50:55 checking machine... 2023/06/21 01:50:55 checking revisions... [ 34.483240] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:50:55 testing simple program... [ 34.539441] cgroup: Unknown subsys name 'net' [ 34.583476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:50:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f11ca5d RCX=1ffff11001e23938 RDX=0000000000000001 RSI=ffff88800f1f5981 RDI=ffff88800f11ca5c RBP=0000000000000073 RSP=ffff8880164ffc20 R8 =0000000000000001 R9 =ffff88800f11ca5c R10=ffff88800f11ca13 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800f11ca6c R14=ffff88800f11ca5c R15=ffff88800f11c980 RIP=ffffffff844d8b6b RFL=00000202 [-------] 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 00007f9cee796900 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=00007f9ceed4e0b0 CR3=000000000d756000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f904c3c7c60 CR3=000000000da04000 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=f94db6bb2796bfbcf14e8a8a35e85a43 XMM02=2c67c8bc2e329bc3000000000011d498 XMM03=fb795ef6d65770560000000000121c00 XMM04=88688ff6669a4c3600000000000ae988 XMM05=e4cb8bb95a7664b60000000000132dc8 XMM06=c34f37eb0d0a02cf0000000000131c30 XMM07=e042d86d42eb936e0000000000121e80 XMM08=c47c7e140080a494000000000011d4f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000