syzkaller login: [ 32.121556] BUG: Bad rss-counter state mm:00000000921463b9 type:MM_FILEPAGES val:33 [ 32.122670] BUG: Bad rss-counter state mm:00000000921463b9 type:MM_ANONPAGES val:22 [ 32.284768] ================================================================== [ 32.285811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.286934] Read of size 8 at addr ffff888010376a50 by task sshd/219 [ 32.287959] [ 32.288227] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.289255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.290406] Call Trace: [ 32.290804] [ 32.291095] dump_stack_lvl+0x91/0xf0 [ 32.291659] print_report+0xcc/0x620 [ 32.292242] ? __virt_addr_valid+0x102/0x340 [ 32.292915] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.293657] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.294281] kasan_report+0xbe/0xf0 [ 32.294743] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.295332] vma_interval_tree_remove+0xc75/0xec0 [ 32.295904] vma_prepare+0xc54/0x11a0 [ 32.296364] __split_vma+0x5af/0x950 [ 32.296823] ? __pfx___split_vma+0x10/0x10 [ 32.297330] ? find_held_lock+0x2c/0x110 [ 32.297824] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.298359] ? lock_is_held_type+0x9f/0x120 [ 32.298878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.299453] ? mtree_range_walk+0x632/0x900 [ 32.300071] ? mas_walk+0x5c7/0x7c0 [ 32.300631] do_vmi_munmap+0x1f1/0x2b0 [ 32.301229] mmap_region+0x1f9/0x2660 [ 32.301809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.302419] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.303203] ? __pfx_lock_acquire+0x10/0x10 [ 32.303736] ? __pfx_mmap_region+0x10/0x10 [ 32.304256] ? security_mmap_addr+0x7d/0xa0 [ 32.304784] ? get_unmapped_area+0x1f5/0x3f0 [ 32.305376] do_mmap+0x854/0xf00 [ 32.305903] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.306489] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.307176] ksys_mmap_pgoff+0x3af/0x500 [ 32.307784] do_syscall_64+0x3f/0x90 [ 32.308276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.308907] RIP: 0033:0x7fc6211a9d82 [ 32.309358] 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 [ 32.311471] RSP: 002b:00007fffe2821b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.312360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6211a9d82 [ 32.313203] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6205e3000 [ 32.314033] RBP: 00007fc6205e3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.314884] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d6cac3ec0 [ 32.315736] R13: 00007fffe2821b40 R14: 00007fffe2821b70 R15: 00007fffe2821ed0 [ 32.316583] [ 32.316872] [ 32.317090] Allocated by task 212: [ 32.317522] kasan_save_stack+0x22/0x50 [ 32.318027] kasan_set_track+0x25/0x30 [ 32.318514] __kasan_slab_alloc+0x59/0x70 [ 32.319048] kmem_cache_alloc+0x16b/0x370 [ 32.319556] vm_area_dup+0x20/0x160 [ 32.320023] __split_vma+0x170/0x950 [ 32.320483] split_vma+0xc6/0x110 [ 32.320916] mprotect_fixup+0x8d2/0xb30 [ 32.321416] do_mprotect_pkey+0x87e/0xd40 [ 32.321929] __x64_sys_mprotect+0x78/0xc0 [ 32.322552] do_syscall_64+0x3f/0x90 [ 32.323151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.323937] [ 32.324199] Freed by task 212: [ 32.324668] kasan_save_stack+0x22/0x50 [ 32.325276] kasan_set_track+0x25/0x30 [ 32.325875] kasan_save_free_info+0x2b/0x50 [ 32.326518] __kasan_slab_free+0x10a/0x190 [ 32.327161] kmem_cache_free+0x10d/0x4d0 [ 32.327657] rcu_core+0x8c8/0x2860 [ 32.328087] __do_softirq+0x1b7/0x7d4 [ 32.328545] [ 32.328749] Last potentially related work creation: [ 32.329406] kasan_save_stack+0x22/0x50 [ 32.329913] __kasan_record_aux_stack+0x8e/0xa0 [ 32.330482] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.331130] remove_vma+0x139/0x170 [ 32.331557] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.332099] do_vmi_munmap+0x1f1/0x2b0 [ 32.332590] __vm_munmap+0x138/0x3a0 [ 32.333057] __x64_sys_munmap+0x59/0x80 [ 32.333533] do_syscall_64+0x3f/0x90 [ 32.333993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.334626] [ 32.334869] The buggy address belongs to the object at ffff8880103769f8 [ 32.334869] which belongs to the cache vm_area_struct of size 168 [ 32.336662] The buggy address is located 88 bytes inside of [ 32.336662] freed 168-byte region [ffff8880103769f8, ffff888010376aa0) [ 32.338138] [ 32.338347] The buggy address belongs to the physical page: [ 32.339003] page:000000004adfc675 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10376 [ 32.340080] memcg:ffff88801a1b8c01 [ 32.340486] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.341109] page_type: 0xffffffff() [ 32.341539] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.342529] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1b8c01 [ 32.343661] page dumped because: kasan: bad access detected [ 32.344463] [ 32.344726] Memory state around the buggy address: [ 32.345434] ffff888010376900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.346483] ffff888010376980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.347433] >ffff888010376a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.348273] ^ [ 32.348957] ffff888010376a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.349824] ffff888010376b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.350782] ================================================================== [ 32.351687] Disabling lock debugging due to kernel taint [ 34.215027] BUG: Bad rss-counter state mm:000000009b8a742c type:MM_FILEPAGES val:33 [ 34.215880] BUG: Bad rss-counter state mm:000000009b8a742c type:MM_ANONPAGES val:22 [ 34.630754] BUG: Bad rss-counter state mm:00000000e8712d66 type:MM_FILEPAGES val:33 [ 34.632124] BUG: Bad rss-counter state mm:00000000e8712d66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26441' (ECDSA) to the list of known hosts. 2023/06/20 03:26:35 fuzzer started 2023/06/20 03:26:35 dialing manager at localhost:44161 2023/06/20 03:26:35 checking machine... 2023/06/20 03:26:35 checking revisions... [ 35.315173] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:26:35 testing simple program... [ 35.357214] cgroup: Unknown subsys name 'net' [ 35.402995] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:26:33 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=1ffff110031e5f86 RCX=0000000000000000 RDX=ffff88800f258000 RSI=0000000000000000 RDI=ffffffff854ee9e0 RBP=dffffc0000000000 RSP=ffff888018f2fc20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffffffff854ee9e0 R13=ffff88800f258000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81482082 RFL=00000202 [-------] 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 00007efc38282900 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=00007efc3883a0b0 CR3=0000000019d2e000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=ffff888008c58400 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=00007fdab5ad72e0 CR3=000000000cc04000 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=d31f64030d8278b88f4280b6c04918bc XMM02=ec2efd57dc4c00df000000000011c528 XMM03=021d7f456a6d94ce000000000011c5f8 XMM04=3c61e8b674b6b68a00000000000ae988 XMM05=dfcdbad4f1609c370000000000133538 XMM06=7d0fe089dac9eeab00000000001323a0 XMM07=e042d86d42eb936e0000000000123cb8 XMM08=021d7f456a6d94ce000000000011c5f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000