syzkaller login: [ 44.135331] BUG: Bad rss-counter state mm:00000000c3977849 type:MM_FILEPAGES val:33 [ 44.136925] BUG: Bad rss-counter state mm:00000000c3977849 type:MM_ANONPAGES val:22 [ 44.291482] ================================================================== [ 44.292404] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.293366] Read of size 8 at addr ffff88800da83140 by task sshd/227 [ 44.294253] [ 44.294476] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.295335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.296326] Call Trace: [ 44.296663] [ 44.296988] dump_stack_lvl+0x91/0xf0 [ 44.297541] print_report+0xcc/0x620 [ 44.298051] ? __virt_addr_valid+0x102/0x340 [ 44.298652] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.299299] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.299944] kasan_report+0xbe/0xf0 [ 44.300447] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.301113] vma_interval_tree_remove+0xc75/0xec0 [ 44.301774] vma_prepare+0xc54/0x11a0 [ 44.302282] __split_vma+0x5af/0x950 [ 44.302801] ? __pfx___split_vma+0x10/0x10 [ 44.303370] ? find_held_lock+0x2c/0x110 [ 44.303938] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.304542] ? lock_is_held_type+0x9f/0x120 [ 44.305127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.305792] ? mtree_range_walk+0x632/0x900 [ 44.306386] ? mas_walk+0x5c7/0x7c0 [ 44.306891] do_vmi_munmap+0x1f1/0x2b0 [ 44.307413] mmap_region+0x1f9/0x2660 [ 44.307916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.308466] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.309218] ? __pfx_lock_acquire+0x10/0x10 [ 44.309813] ? __pfx_mmap_region+0x10/0x10 [ 44.310369] ? security_mmap_addr+0x7d/0xa0 [ 44.310940] ? get_unmapped_area+0x1f5/0x3f0 [ 44.311526] do_mmap+0x854/0xf00 [ 44.311995] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.312518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.313118] ksys_mmap_pgoff+0x3af/0x500 [ 44.313674] do_syscall_64+0x3f/0x90 [ 44.314172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.314856] RIP: 0033:0x7fa88cdbdd82 [ 44.315354] 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 [ 44.317609] RSP: 002b:00007ffd80ea55a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.318567] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa88cdbdd82 [ 44.319472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa88c1f7000 [ 44.320377] RBP: 00007fa88c1f7000 R08: 0000000000000009 R09: 0000000000001000 [ 44.321286] R10: 0000000000000812 R11: 0000000000000206 R12: 000056480ed99b20 [ 44.322172] R13: 00007ffd80ea55c0 R14: 00007ffd80ea55f0 R15: 00007ffd80ea5950 [ 44.323093] [ 44.323404] [ 44.323630] Allocated by task 220: [ 44.324071] kasan_save_stack+0x22/0x50 [ 44.324615] kasan_set_track+0x25/0x30 [ 44.325135] __kasan_slab_alloc+0x59/0x70 [ 44.325694] kmem_cache_alloc+0x16b/0x370 [ 44.326234] vm_area_dup+0x20/0x160 [ 44.326713] __split_vma+0x170/0x950 [ 44.327211] split_vma+0xc6/0x110 [ 44.327669] mprotect_fixup+0x8d2/0xb30 [ 44.328196] do_mprotect_pkey+0x87e/0xd40 [ 44.328750] __x64_sys_mprotect+0x78/0xc0 [ 44.329323] do_syscall_64+0x3f/0x90 [ 44.329818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.330491] [ 44.330725] Freed by task 220: [ 44.331148] kasan_save_stack+0x22/0x50 [ 44.331683] kasan_set_track+0x25/0x30 [ 44.332208] kasan_save_free_info+0x2b/0x50 [ 44.332770] __kasan_slab_free+0x10a/0x190 [ 44.333341] kmem_cache_free+0x10d/0x4d0 [ 44.333875] rcu_core+0x8c8/0x2860 [ 44.334347] __do_softirq+0x1b7/0x7d4 [ 44.334858] [ 44.335078] Last potentially related work creation: [ 44.335687] kasan_save_stack+0x22/0x50 [ 44.336221] __kasan_record_aux_stack+0x8e/0xa0 [ 44.336819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.337507] remove_vma+0x139/0x170 [ 44.337976] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.338557] do_vmi_munmap+0x1f1/0x2b0 [ 44.339080] __vm_munmap+0x138/0x3a0 [ 44.339578] __x64_sys_munmap+0x59/0x80 [ 44.340091] do_syscall_64+0x3f/0x90 [ 44.340592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.341279] [ 44.341513] The buggy address belongs to the object at ffff88800da830e8 [ 44.341513] which belongs to the cache vm_area_struct of size 168 [ 44.343085] The buggy address is located 88 bytes inside of [ 44.343085] freed 168-byte region [ffff88800da830e8, ffff88800da83190) [ 44.344571] [ 44.344791] The buggy address belongs to the physical page: [ 44.345503] page:00000000533492c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda83 [ 44.346655] memcg:ffff88800da84001 [ 44.347095] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.347773] page_type: 0xffffffff() [ 44.348252] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.349234] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da84001 [ 44.350242] page dumped because: kasan: bad access detected [ 44.350932] [ 44.351162] Memory state around the buggy address: [ 44.351774] ffff88800da83000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.352671] ffff88800da83080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 44.353600] >ffff88800da83100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.354495] ^ [ 44.355166] ffff88800da83180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 44.356097] ffff88800da83200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 44.357034] ================================================================== [ 44.358162] Disabling lock debugging due to kernel taint [ 46.095170] BUG: Bad rss-counter state mm:00000000b9336e59 type:MM_FILEPAGES val:33 [ 46.096243] BUG: Bad rss-counter state mm:00000000b9336e59 type:MM_ANONPAGES val:22 [ 46.508355] BUG: Bad rss-counter state mm:000000004d84e18c type:MM_FILEPAGES val:33 [ 46.509105] BUG: Bad rss-counter state mm:000000004d84e18c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55679' (ECDSA) to the list of known hosts. 2023/06/19 19:43:24 fuzzer started 2023/06/19 19:43:24 dialing manager at localhost:44161 2023/06/19 19:43:24 checking machine... 2023/06/19 19:43:24 checking revisions... [ 47.319741] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:43:24 testing simple program... [ 47.368258] cgroup: Unknown subsys name 'net' [ 47.414183] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:43:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f1df84b0360 CR3=00000000166a4000 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=2033323a33343a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a33343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff83ab4217 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801a22f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000e2700000e27 R12=0000000000000000 R13=00000000000000fa R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c01d0 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 00007ff582452900 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=00007ffef8335000 CR3=000000000fbcc000 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=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