syzkaller login: [ 76.767710] BUG: Bad rss-counter state mm:0000000013f9b5f9 type:MM_FILEPAGES val:33 [ 76.768855] BUG: Bad rss-counter state mm:0000000013f9b5f9 type:MM_ANONPAGES val:22 [ 76.929055] ================================================================== [ 76.930134] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 76.931248] Read of size 8 at addr ffff888009904d08 by task sshd/228 [ 76.932340] [ 76.932600] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 76.933612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 76.934807] Call Trace: [ 76.935214] [ 76.935553] dump_stack_lvl+0x91/0xf0 [ 76.936046] print_report+0xcc/0x620 [ 76.936535] ? __virt_addr_valid+0x102/0x340 [ 76.937088] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.937712] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.938335] kasan_report+0xbe/0xf0 [ 76.938826] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.939478] vma_interval_tree_remove+0xc75/0xec0 [ 76.940091] vma_prepare+0xc54/0x11a0 [ 76.940572] __split_vma+0x5af/0x950 [ 76.941069] ? __pfx___split_vma+0x10/0x10 [ 76.941583] ? find_held_lock+0x2c/0x110 [ 76.942089] do_vmi_align_munmap+0x2ba/0x11f0 [ 76.942633] ? lock_is_held_type+0x9f/0x120 [ 76.943161] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 76.943849] ? mtree_range_walk+0x632/0x900 [ 76.944483] ? mas_walk+0x5c7/0x7c0 [ 76.944975] do_vmi_munmap+0x1f1/0x2b0 [ 76.945469] mmap_region+0x1f9/0x2660 [ 76.945968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 76.946487] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 76.947224] ? __pfx_lock_acquire+0x10/0x10 [ 76.947749] ? __pfx_mmap_region+0x10/0x10 [ 76.948294] ? security_mmap_addr+0x7d/0xa0 [ 76.948819] ? get_unmapped_area+0x1f5/0x3f0 [ 76.949382] do_mmap+0x854/0xf00 [ 76.949816] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.950298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 76.950851] ksys_mmap_pgoff+0x3af/0x500 [ 76.951360] do_syscall_64+0x3f/0x90 [ 76.951828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.952466] RIP: 0033:0x7f972bfead82 [ 76.952925] 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 [ 76.955008] RSP: 002b:00007ffef0aaee48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 76.955903] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f972bfead82 [ 76.956757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f972b424000 [ 76.957605] RBP: 00007f972b424000 R08: 0000000000000009 R09: 0000000000001000 [ 76.958465] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a72887cf70 [ 76.959307] R13: 00007ffef0aaee60 R14: 00007ffef0aaee90 R15: 00007ffef0aaf1f0 [ 76.960143] [ 76.960427] [ 76.960637] Allocated by task 221: [ 76.961063] kasan_save_stack+0x22/0x50 [ 76.961556] kasan_set_track+0x25/0x30 [ 76.962040] __kasan_slab_alloc+0x59/0x70 [ 76.962557] kmem_cache_alloc+0x16b/0x370 [ 76.963066] vm_area_dup+0x20/0x160 [ 76.963538] __split_vma+0x170/0x950 [ 76.964037] split_vma+0xc6/0x110 [ 76.964475] mprotect_fixup+0x8d2/0xb30 [ 76.964988] do_mprotect_pkey+0x87e/0xd40 [ 76.965498] __x64_sys_mprotect+0x78/0xc0 [ 76.966029] do_syscall_64+0x3f/0x90 [ 76.966506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.967154] [ 76.967381] Freed by task 221: [ 76.967764] kasan_save_stack+0x22/0x50 [ 76.968288] kasan_set_track+0x25/0x30 [ 76.968784] kasan_save_free_info+0x2b/0x50 [ 76.969324] __kasan_slab_free+0x10a/0x190 [ 76.969860] kmem_cache_free+0x10d/0x4d0 [ 76.970398] rcu_core+0x8c8/0x2860 [ 76.970839] __do_softirq+0x1b7/0x7d4 [ 76.971344] [ 76.971561] Last potentially related work creation: [ 76.972226] kasan_save_stack+0x22/0x50 [ 76.972731] __kasan_record_aux_stack+0x8e/0xa0 [ 76.973313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 76.973974] remove_vma+0x139/0x170 [ 76.974427] do_vmi_align_munmap+0xd4a/0x11f0 [ 76.975001] do_vmi_munmap+0x1f1/0x2b0 [ 76.975506] __vm_munmap+0x138/0x3a0 [ 76.976001] __x64_sys_munmap+0x59/0x80 [ 76.976493] do_syscall_64+0x3f/0x90 [ 76.976956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.977583] [ 76.977794] The buggy address belongs to the object at ffff888009904cb0 [ 76.977794] which belongs to the cache vm_area_struct of size 168 [ 76.979234] The buggy address is located 88 bytes inside of [ 76.979234] freed 168-byte region [ffff888009904cb0, ffff888009904d58) [ 76.980616] [ 76.980834] The buggy address belongs to the physical page: [ 76.981488] page:00000000725dd967 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9904 [ 76.982551] memcg:ffff88800df9ca01 [ 76.982977] flags: 0x100000000000200(slab|node=0|zone=1) [ 76.983630] page_type: 0xffffffff() [ 76.984070] raw: 0100000000000200 ffff88800879fc80 ffffea0000399080 dead000000000004 [ 76.984976] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df9ca01 [ 76.985855] page dumped because: kasan: bad access detected [ 76.986496] [ 76.986705] Memory state around the buggy address: [ 76.987272] ffff888009904c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 76.988101] ffff888009904c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 76.988940] >ffff888009904d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 76.989770] ^ [ 76.990198] ffff888009904d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 76.991039] ffff888009904e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 76.991876] ================================================================== [ 76.992796] Disabling lock debugging due to kernel taint [ 79.567662] BUG: Bad rss-counter state mm:000000004e57fb4f type:MM_FILEPAGES val:33 [ 79.569037] BUG: Bad rss-counter state mm:000000004e57fb4f type:MM_ANONPAGES val:22 [ 79.973794] BUG: Bad rss-counter state mm:0000000006f2c7fb type:MM_FILEPAGES val:33 [ 79.974966] BUG: Bad rss-counter state mm:0000000006f2c7fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57522' (ECDSA) to the list of known hosts. 2023/06/20 06:22:26 fuzzer started 2023/06/20 06:22:26 dialing manager at localhost:44161 2023/06/20 06:22:26 checking machine... 2023/06/20 06:22:26 checking revisions... [ 80.679206] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:22:26 testing simple program... [ 80.729942] cgroup: Unknown subsys name 'net' [ 80.785337] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:22:18 Registers: info registers vcpu 0 RAX=ffff888017dd8001 RBX=ffff888017dd79a8 RCX=0000000000000001 RDX=ffff888017dd7a01 RSI=ffff888017dd7a40 RDI=ffff888017dd79b8 RBP=ffff888017dd7a40 RSP=ffff888017dd78b0 R8 =0000000000000001 R9 =ffff888017dd79e8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff888017dd0000 R14=ffff888017dd7a40 R15=ffff888017dd79a8 RIP=ffffffff8113048d 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 00007fc8361fe900 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=00007ffedff04000 CR3=000000000c640000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f002f8bb000 CR3=000000000c6fe000 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=e4ee04eb00caa68eaf449d2ea4367a6f XMM02=000000000011cc78ec2efd57dc4c00df XMM03=0000000000124ac00df55ed45c353a86 XMM04=db007444d2e7a73700000000000ae988 XMM05=402d70e3cd292ba80000000000135820 XMM06=8fede82a5ad58cbe00000000001348c0 XMM07=e042d86d42eb936e0000000000124d40 XMM08=0df55ed45c353a86000000000011ccd8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000