syzkaller login: [ 38.749976] BUG: Bad rss-counter state mm:00000000c7573329 type:MM_FILEPAGES val:33 [ 38.750997] BUG: Bad rss-counter state mm:00000000c7573329 type:MM_ANONPAGES val:22 [ 38.933119] ================================================================== [ 38.934092] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.935038] Read of size 8 at addr ffff88800f50ced8 by task sshd/219 [ 38.935919] [ 38.936137] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.937027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.938094] Call Trace: [ 38.938413] [ 38.938700] dump_stack_lvl+0x91/0xf0 [ 38.939198] print_report+0xcc/0x620 [ 38.939691] ? __virt_addr_valid+0x102/0x340 [ 38.940250] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.940879] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.941537] kasan_report+0xbe/0xf0 [ 38.942014] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.942646] vma_interval_tree_remove+0xc75/0xec0 [ 38.943259] vma_prepare+0xc54/0x11a0 [ 38.943749] __split_vma+0x5af/0x950 [ 38.944224] ? __pfx___split_vma+0x10/0x10 [ 38.944765] ? find_held_lock+0x2c/0x110 [ 38.945297] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.945905] ? lock_is_held_type+0x9f/0x120 [ 38.946450] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.947063] ? mtree_range_walk+0x632/0x900 [ 38.947626] ? mas_walk+0x5c7/0x7c0 [ 38.948108] do_vmi_munmap+0x1f1/0x2b0 [ 38.948605] mmap_region+0x1f9/0x2660 [ 38.949089] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.949633] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.950355] ? __pfx_lock_acquire+0x10/0x10 [ 38.950898] ? __pfx_mmap_region+0x10/0x10 [ 38.951434] ? security_mmap_addr+0x7d/0xa0 [ 38.951971] ? get_unmapped_area+0x1f5/0x3f0 [ 38.952525] do_mmap+0x854/0xf00 [ 38.952964] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.953476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.954050] ksys_mmap_pgoff+0x3af/0x500 [ 38.954566] do_syscall_64+0x3f/0x90 [ 38.955048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955708] RIP: 0033:0x7fafe0155d82 [ 38.956169] 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 [ 38.958333] RSP: 002b:00007ffe1f568b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.959245] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fafe0155d82 [ 38.960105] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fafdf58f000 [ 38.960956] RBP: 00007fafdf58f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.961828] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9dac67b20 [ 38.962693] R13: 00007ffe1f568b30 R14: 00007ffe1f568b60 R15: 00007ffe1f568ec0 [ 38.963559] [ 38.963852] [ 38.964070] Allocated by task 212: [ 38.964500] kasan_save_stack+0x22/0x50 [ 38.965011] kasan_set_track+0x25/0x30 [ 38.965519] __kasan_slab_alloc+0x59/0x70 [ 38.966052] kmem_cache_alloc+0x16b/0x370 [ 38.966573] vm_area_dup+0x20/0x160 [ 38.967034] __split_vma+0x170/0x950 [ 38.967504] split_vma+0xc6/0x110 [ 38.967952] mprotect_fixup+0x8d2/0xb30 [ 38.968465] do_mprotect_pkey+0x87e/0xd40 [ 38.968999] __x64_sys_mprotect+0x78/0xc0 [ 38.969547] do_syscall_64+0x3f/0x90 [ 38.970027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.970682] [ 38.970902] Freed by task 212: [ 38.971299] kasan_save_stack+0x22/0x50 [ 38.971807] kasan_set_track+0x25/0x30 [ 38.972308] kasan_save_free_info+0x2b/0x50 [ 38.972842] __kasan_slab_free+0x10a/0x190 [ 38.973385] kmem_cache_free+0x10d/0x4d0 [ 38.973913] rcu_core+0x8c8/0x2860 [ 38.974364] __do_softirq+0x1b7/0x7d4 [ 38.974847] [ 38.975062] Last potentially related work creation: [ 38.975651] kasan_save_stack+0x22/0x50 [ 38.976159] __kasan_record_aux_stack+0x8e/0xa0 [ 38.976736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.977386] remove_vma+0x139/0x170 [ 38.977862] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.978425] do_vmi_munmap+0x1f1/0x2b0 [ 38.978923] __vm_munmap+0x138/0x3a0 [ 38.979397] __x64_sys_munmap+0x59/0x80 [ 38.979893] do_syscall_64+0x3f/0x90 [ 38.980376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.981026] [ 38.981246] The buggy address belongs to the object at ffff88800f50ce80 [ 38.981246] which belongs to the cache vm_area_struct of size 168 [ 38.982734] The buggy address is located 88 bytes inside of [ 38.982734] freed 168-byte region [ffff88800f50ce80, ffff88800f50cf28) [ 38.984158] [ 38.984378] The buggy address belongs to the physical page: [ 38.985050] page:00000000c251ebaa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf50c [ 38.986154] memcg:ffff88800e4c9d01 [ 38.986586] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.987246] page_type: 0xffffffff() [ 38.987704] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.988637] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4c9d01 [ 38.989568] page dumped because: kasan: bad access detected [ 38.990238] [ 38.990458] Memory state around the buggy address: [ 38.991055] ffff88800f50cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.991919] ffff88800f50ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.992781] >ffff88800f50ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.993636] ^ [ 38.994370] ffff88800f50cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.995231] ffff88800f50cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.996083] ================================================================== [ 38.997075] Disabling lock debugging due to kernel taint [ 40.741644] BUG: Bad rss-counter state mm:000000002386f542 type:MM_FILEPAGES val:33 [ 40.742625] BUG: Bad rss-counter state mm:000000002386f542 type:MM_ANONPAGES val:22 [ 41.105493] BUG: Bad rss-counter state mm:0000000091e08b1f type:MM_FILEPAGES val:33 [ 41.106724] BUG: Bad rss-counter state mm:0000000091e08b1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64650' (ECDSA) to the list of known hosts. 2023/06/20 12:42:16 fuzzer started 2023/06/20 12:42:16 dialing manager at localhost:36067 2023/06/20 12:42:16 checking machine... 2023/06/20 12:42:16 checking revisions... [ 41.769062] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:42:16 testing simple program... [ 41.819613] cgroup: Unknown subsys name 'net' [ 41.894886] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:42:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009a77740 RCX=0000000000000000 RDX=ffff888016b89b40 RSI=ffffffff83ab18e3 RDI=ffff888016b89f34 RBP=0000000000000000 RSP=ffff88800e77f508 R8 =0000000000000005 R9 =0000000000000000 R10=00000000000000e8 R11=00000d4200000d42 R12=0000000000000000 R13=00000000000000e8 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab18e6 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 00007fe8577ca900 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=00007ffeace76000 CR3=000000000c796000 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=0000000000000001 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=00007ffcd9ec2f68 CR3=00000000177fe000 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=2035313a32343a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a32343a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000