syzkaller login: [ 61.808203] BUG: Bad rss-counter state mm:0000000071c5fafe type:MM_FILEPAGES val:33 [ 61.809385] BUG: Bad rss-counter state mm:0000000071c5fafe type:MM_ANONPAGES val:22 [ 61.968312] ================================================================== [ 61.969210] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.970141] Read of size 8 at addr ffff88800ea67880 by task sshd/221 [ 61.970909] [ 61.971124] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.972182] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.973165] Call Trace: [ 61.973489] [ 61.973774] dump_stack_lvl+0x91/0xf0 [ 61.974265] print_report+0xcc/0x620 [ 61.974758] ? __virt_addr_valid+0x102/0x340 [ 61.975307] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.975946] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.976561] kasan_report+0xbe/0xf0 [ 61.977033] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.977652] vma_interval_tree_remove+0xc75/0xec0 [ 61.978263] vma_prepare+0xc54/0x11a0 [ 61.978737] __split_vma+0x5af/0x950 [ 61.979208] ? __pfx___split_vma+0x10/0x10 [ 61.979741] ? find_held_lock+0x2c/0x110 [ 61.980276] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.980839] ? lock_is_held_type+0x9f/0x120 [ 61.981377] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.981985] ? mtree_range_walk+0x632/0x900 [ 61.982534] ? mas_walk+0x5c7/0x7c0 [ 61.983012] do_vmi_munmap+0x1f1/0x2b0 [ 61.983503] mmap_region+0x1f9/0x2660 [ 61.983988] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.984497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.985216] ? __pfx_lock_acquire+0x10/0x10 [ 61.985742] ? __pfx_mmap_region+0x10/0x10 [ 61.986276] ? security_mmap_addr+0x7d/0xa0 [ 61.986815] ? get_unmapped_area+0x1f5/0x3f0 [ 61.987361] do_mmap+0x854/0xf00 [ 61.987802] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.988323] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.988890] ksys_mmap_pgoff+0x3af/0x500 [ 61.989396] do_syscall_64+0x3f/0x90 [ 61.989879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.990526] RIP: 0033:0x7f2a18e34d82 [ 61.990978] 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 [ 61.993100] RSP: 002b:00007ffe46250cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.994006] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a18e34d82 [ 61.994855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a1826e000 [ 61.995705] RBP: 00007f2a1826e000 R08: 0000000000000009 R09: 0000000000001000 [ 61.996559] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ebcd75ec0 [ 61.997411] R13: 00007ffe46250ce0 R14: 00007ffe46250d10 R15: 00007ffe46251070 [ 61.998267] [ 61.998561] [ 61.998779] Allocated by task 214: [ 61.999210] kasan_save_stack+0x22/0x50 [ 61.999714] kasan_set_track+0x25/0x30 [ 62.000227] __kasan_slab_alloc+0x59/0x70 [ 62.000749] kmem_cache_alloc+0x16b/0x370 [ 62.001262] vm_area_dup+0x20/0x160 [ 62.001724] __split_vma+0x170/0x950 [ 62.002186] split_vma+0xc6/0x110 [ 62.002624] mprotect_fixup+0x8d2/0xb30 [ 62.003121] do_mprotect_pkey+0x87e/0xd40 [ 62.003640] __x64_sys_mprotect+0x78/0xc0 [ 62.004178] do_syscall_64+0x3f/0x90 [ 62.004660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.005310] [ 62.005525] Freed by task 214: [ 62.005916] kasan_save_stack+0x22/0x50 [ 62.006413] kasan_set_track+0x25/0x30 [ 62.006905] kasan_save_free_info+0x2b/0x50 [ 62.007439] __kasan_slab_free+0x10a/0x190 [ 62.007990] kmem_cache_free+0x10d/0x4d0 [ 62.008493] rcu_core+0x8c8/0x2860 [ 62.008941] __do_softirq+0x1b7/0x7d4 [ 62.009414] [ 62.009631] Last potentially related work creation: [ 62.010210] kasan_save_stack+0x22/0x50 [ 62.010710] __kasan_record_aux_stack+0x8e/0xa0 [ 62.011283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.011939] remove_vma+0x139/0x170 [ 62.012387] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.012947] do_vmi_munmap+0x1f1/0x2b0 [ 62.013513] __vm_munmap+0x138/0x3a0 [ 62.013987] __x64_sys_munmap+0x59/0x80 [ 62.014484] do_syscall_64+0x3f/0x90 [ 62.014962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.015599] [ 62.015814] The buggy address belongs to the object at ffff88800ea67828 [ 62.015814] which belongs to the cache vm_area_struct of size 168 [ 62.017350] The buggy address is located 88 bytes inside of [ 62.017350] freed 168-byte region [ffff88800ea67828, ffff88800ea678d0) [ 62.018771] [ 62.018986] The buggy address belongs to the physical page: [ 62.019658] page:00000000c8f10fab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea67 [ 62.020771] memcg:ffff88800ec12c01 [ 62.021203] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.021849] page_type: 0xffffffff() [ 62.022308] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d5540 dead000000000008 [ 62.023222] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec12c01 [ 62.024132] page dumped because: kasan: bad access detected [ 62.024785] [ 62.025000] Memory state around the buggy address: [ 62.025578] ffff88800ea67780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 62.026440] ffff88800ea67800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 62.027298] >ffff88800ea67880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 62.028164] ^ [ 62.028574] ffff88800ea67900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.029450] ffff88800ea67980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 62.030305] ================================================================== [ 62.031403] Disabling lock debugging due to kernel taint [ 64.262554] BUG: Bad rss-counter state mm:00000000198face3 type:MM_FILEPAGES val:33 [ 64.263369] BUG: Bad rss-counter state mm:00000000198face3 type:MM_ANONPAGES val:22 [ 64.736127] BUG: Bad rss-counter state mm:000000001b3ea5d6 type:MM_FILEPAGES val:33 [ 64.737387] BUG: Bad rss-counter state mm:000000001b3ea5d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46064' (ECDSA) to the list of known hosts. 2023/06/20 11:41:28 fuzzer started 2023/06/20 11:41:28 dialing manager at localhost:36067 2023/06/20 11:41:28 checking machine... 2023/06/20 11:41:28 checking revisions... [ 65.482438] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:41:28 testing simple program... [ 65.533289] cgroup: Unknown subsys name 'net' [ 65.591914] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:41:27 Registers: info registers vcpu 0 RAX=ffffffff8186b835 RBX=0000000000000002 RCX=0000000000000001 RDX=ffff88806ce09a98 RSI=ffffffff8186b835 RDI=ffff88806ce09a50 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09b18 R13=ffff88806ce09a98 R14=ffff88800905d1c0 R15=ffff88806ce09a50 RIP=ffffffff81130641 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 00007ff5c2b20700 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=00007fe610396690 CR3=0000000015ae4000 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=2037323a31343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a31343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000020 RCX=0000000000000000 RDX=ffff888015a53680 RSI=ffffffff844a4f30 RDI=0000000000000005 RBP=ffff88800da59880 RSP=ffff88800fe1fce0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=0000000000000000 R12=0000000000000004 R13=0000000000000008 R14=00007f448ea4e000 R15=00007f448ea53fff RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f448e499900 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=00007f448ea50618 CR3=000000000f278000 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=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