syzkaller login: [ 30.777269] BUG: Bad rss-counter state mm:00000000db10a94b type:MM_FILEPAGES val:33 [ 30.778701] BUG: Bad rss-counter state mm:00000000db10a94b type:MM_ANONPAGES val:22 [ 30.944424] ================================================================== [ 30.945352] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.946309] Read of size 8 at addr ffff88800d62f140 by task sshd/222 [ 30.947152] [ 30.947414] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.948403] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.949344] Call Trace: [ 30.949645] [ 30.949915] dump_stack_lvl+0x91/0xf0 [ 30.950387] print_report+0xcc/0x620 [ 30.950847] ? __virt_addr_valid+0x102/0x340 [ 30.951375] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.951961] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.952551] kasan_report+0xbe/0xf0 [ 30.953003] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.953602] vma_interval_tree_remove+0xc75/0xec0 [ 30.954235] vma_prepare+0xc54/0x11a0 [ 30.954737] __split_vma+0x5af/0x950 [ 30.955218] ? __pfx___split_vma+0x10/0x10 [ 30.955762] ? find_held_lock+0x2c/0x110 [ 30.956305] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.956902] ? lock_is_held_type+0x9f/0x120 [ 30.957499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.958123] ? mtree_range_walk+0x632/0x900 [ 30.958689] ? mas_walk+0x5c7/0x7c0 [ 30.959176] do_vmi_munmap+0x1f1/0x2b0 [ 30.959670] mmap_region+0x1f9/0x2660 [ 30.960160] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.960680] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.961413] ? __pfx_lock_acquire+0x10/0x10 [ 30.961943] ? __pfx_mmap_region+0x10/0x10 [ 30.962471] ? security_mmap_addr+0x7d/0xa0 [ 30.962998] ? get_unmapped_area+0x1f5/0x3f0 [ 30.963552] do_mmap+0x854/0xf00 [ 30.963988] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.964499] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.965068] ksys_mmap_pgoff+0x3af/0x500 [ 30.965586] do_syscall_64+0x3f/0x90 [ 30.966063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.966713] RIP: 0033:0x7fcb3d585d82 [ 30.967170] 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 [ 30.969350] RSP: 002b:00007ffc852dc4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.970305] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb3d585d82 [ 30.971205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb3c9bf000 [ 30.972102] RBP: 00007fcb3c9bf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.972977] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1b3a53ec0 [ 30.973839] R13: 00007ffc852dc4d0 R14: 00007ffc852dc500 R15: 00007ffc852dc860 [ 30.974704] [ 30.974997] [ 30.975214] Allocated by task 215: [ 30.975645] kasan_save_stack+0x22/0x50 [ 30.976149] kasan_set_track+0x25/0x30 [ 30.976645] __kasan_slab_alloc+0x59/0x70 [ 30.977184] kmem_cache_alloc+0x16b/0x370 [ 30.977697] vm_area_dup+0x20/0x160 [ 30.978149] __split_vma+0x170/0x950 [ 30.978622] split_vma+0xc6/0x110 [ 30.979059] mprotect_fixup+0x8d2/0xb30 [ 30.979564] do_mprotect_pkey+0x87e/0xd40 [ 30.980082] __x64_sys_mprotect+0x78/0xc0 [ 30.980599] do_syscall_64+0x3f/0x90 [ 30.981076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.981724] [ 30.981952] Freed by task 215: [ 30.982344] kasan_save_stack+0x22/0x50 [ 30.982856] kasan_set_track+0x25/0x30 [ 30.983351] kasan_save_free_info+0x2b/0x50 [ 30.983888] __kasan_slab_free+0x10a/0x190 [ 30.984391] kmem_cache_free+0x10d/0x4d0 [ 30.984879] rcu_core+0x8c8/0x2860 [ 30.985320] __do_softirq+0x1b7/0x7d4 [ 30.985807] [ 30.986027] Last potentially related work creation: [ 30.986616] kasan_save_stack+0x22/0x50 [ 30.987122] __kasan_record_aux_stack+0x8e/0xa0 [ 30.987710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.988358] remove_vma+0x139/0x170 [ 30.988812] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.989394] do_vmi_munmap+0x1f1/0x2b0 [ 30.989888] __vm_munmap+0x138/0x3a0 [ 30.990369] __x64_sys_munmap+0x59/0x80 [ 30.990879] do_syscall_64+0x3f/0x90 [ 30.991384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.992057] [ 30.992278] The buggy address belongs to the object at ffff88800d62f0e8 [ 30.992278] which belongs to the cache vm_area_struct of size 168 [ 30.993780] The buggy address is located 88 bytes inside of [ 30.993780] freed 168-byte region [ffff88800d62f0e8, ffff88800d62f190) [ 30.995211] [ 30.995429] The buggy address belongs to the physical page: [ 30.996092] page:00000000e1a36747 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd62f [ 30.997130] memcg:ffff88800d745701 [ 30.997531] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.998135] page_type: 0xffffffff() [ 30.998566] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.999433] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d745701 [ 31.000307] page dumped because: kasan: bad access detected [ 31.000972] [ 31.001186] Memory state around the buggy address: [ 31.001754] ffff88800d62f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.002604] ffff88800d62f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.003439] >ffff88800d62f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.004277] ^ [ 31.004917] ffff88800d62f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.005772] ffff88800d62f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.006642] ================================================================== [ 31.007615] Disabling lock debugging due to kernel taint [ 32.859464] BUG: Bad rss-counter state mm:000000005ef689a3 type:MM_FILEPAGES val:33 [ 32.860430] BUG: Bad rss-counter state mm:000000005ef689a3 type:MM_ANONPAGES val:22 [ 33.313711] BUG: Bad rss-counter state mm:00000000ff15a083 type:MM_FILEPAGES val:33 [ 33.314572] BUG: Bad rss-counter state mm:00000000ff15a083 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19035' (ECDSA) to the list of known hosts. 2023/06/20 17:34:50 fuzzer started 2023/06/20 17:34:51 dialing manager at localhost:36067 2023/06/20 17:34:51 checking machine... 2023/06/20 17:34:51 checking revisions... [ 33.981373] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:34:51 testing simple program... [ 34.028241] cgroup: Unknown subsys name 'net' [ 34.078428] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:34:50 Registers: info registers vcpu 0 RAX=ffffffff83640672 RBX=ffffffff85fa5700 RCX=ffffffff83640611 RDX=0000000000000000 RSI=ffffffff863b40b2 RDI=ffffffff85fa56e0 RBP=ffffffff85fa56e0 RSP=ffff88801689f4c8 R8 =ffffffff863b40b2 R9 =ffff88801689f5c0 R10=0000000000038001 R11=000000000008ab47 R12=ffffffff85fa56fc R13=ffffffff85fa56e0 R14=ffffffff85fa56e0 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000297 [--S-APC] 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 00007f9e86872900 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=00007f26517b4e10 CR3=000000001a3c8000 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=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 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=00007f9e86e29618 CR3=0000000009f2a000 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=2030353a34333a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a34333a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000