syzkaller login: [ 39.493687] BUG: Bad rss-counter state mm:000000004135620d type:MM_FILEPAGES val:33 [ 39.494908] BUG: Bad rss-counter state mm:000000004135620d type:MM_ANONPAGES val:22 [ 39.532272] ================================================================== [ 39.533226] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.534163] Read of size 8 at addr ffff88800d41adf0 by task sshd/218 [ 39.534933] [ 39.535147] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.535997] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.536978] Call Trace: [ 39.537293] [ 39.537585] dump_stack_lvl+0x91/0xf0 [ 39.538078] print_report+0xcc/0x620 [ 39.538564] ? __virt_addr_valid+0x102/0x340 [ 39.539130] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.539750] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.540365] kasan_report+0xbe/0xf0 [ 39.540850] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.541484] vma_interval_tree_remove+0xc75/0xec0 [ 39.542082] vma_prepare+0xc54/0x11a0 [ 39.542584] __split_vma+0x5af/0x950 [ 39.543054] ? __pfx___split_vma+0x10/0x10 [ 39.543582] ? find_held_lock+0x2c/0x110 [ 39.544107] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.544679] ? lock_is_held_type+0x9f/0x120 [ 39.545215] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.545821] ? mtree_range_walk+0x632/0x900 [ 39.546370] ? mas_walk+0x5c7/0x7c0 [ 39.546858] do_vmi_munmap+0x1f1/0x2b0 [ 39.547348] mmap_region+0x1f9/0x2660 [ 39.547835] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.548357] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.549070] ? __pfx_lock_acquire+0x10/0x10 [ 39.549603] ? __pfx_mmap_region+0x10/0x10 [ 39.550128] ? security_mmap_addr+0x7d/0xa0 [ 39.550669] ? get_unmapped_area+0x1f5/0x3f0 [ 39.551214] do_mmap+0x854/0xf00 [ 39.551654] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.552144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.552715] ksys_mmap_pgoff+0x3af/0x500 [ 39.553221] do_syscall_64+0x3f/0x90 [ 39.553701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.554355] RIP: 0033:0x7fd4e2164d82 [ 39.554828] 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 [ 39.556961] RSP: 002b:00007ffd5a5c4568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.557863] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4e2164d82 [ 39.558839] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4e159e000 [ 39.559716] RBP: 00007fd4e159e000 R08: 0000000000000009 R09: 0000000000001000 [ 39.560572] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3ca301ec0 [ 39.561437] R13: 00007ffd5a5c4580 R14: 00007ffd5a5c45b0 R15: 00007ffd5a5c4910 [ 39.562309] [ 39.562626] [ 39.562847] Allocated by task 211: [ 39.563278] kasan_save_stack+0x22/0x50 [ 39.563797] kasan_set_track+0x25/0x30 [ 39.564302] __kasan_slab_alloc+0x59/0x70 [ 39.564825] kmem_cache_alloc+0x16b/0x370 [ 39.565352] vm_area_dup+0x20/0x160 [ 39.565816] __split_vma+0x170/0x950 [ 39.566281] split_vma+0xc6/0x110 [ 39.566732] mprotect_fixup+0x8d2/0xb30 [ 39.567242] do_mprotect_pkey+0x87e/0xd40 [ 39.567774] __x64_sys_mprotect+0x78/0xc0 [ 39.568295] do_syscall_64+0x3f/0x90 [ 39.568766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.569404] [ 39.569620] Freed by task 211: [ 39.570011] kasan_save_stack+0x22/0x50 [ 39.570529] kasan_set_track+0x25/0x30 [ 39.571023] kasan_save_free_info+0x2b/0x50 [ 39.571555] __kasan_slab_free+0x10a/0x190 [ 39.572083] kmem_cache_free+0x10d/0x4d0 [ 39.572594] rcu_core+0x8c8/0x2860 [ 39.573037] __do_softirq+0x1b7/0x7d4 [ 39.573513] [ 39.573727] Last potentially related work creation: [ 39.574311] kasan_save_stack+0x22/0x50 [ 39.574837] __kasan_record_aux_stack+0x8e/0xa0 [ 39.575408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.576056] remove_vma+0x139/0x170 [ 39.576511] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.577066] do_vmi_munmap+0x1f1/0x2b0 [ 39.577555] __vm_munmap+0x138/0x3a0 [ 39.578022] __x64_sys_munmap+0x59/0x80 [ 39.578524] do_syscall_64+0x3f/0x90 [ 39.578993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.579641] [ 39.579856] The buggy address belongs to the object at ffff88800d41ad98 [ 39.579856] which belongs to the cache vm_area_struct of size 168 [ 39.581314] The buggy address is located 88 bytes inside of [ 39.581314] freed 168-byte region [ffff88800d41ad98, ffff88800d41ae40) [ 39.582753] [ 39.582969] The buggy address belongs to the physical page: [ 39.583643] page:00000000c0bfbfc1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd41a [ 39.584724] memcg:ffff88800c4c1501 [ 39.585166] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.585816] page_type: 0xffffffff() [ 39.586265] raw: 0100000000000200 ffff88800879fc80 ffffea000037c000 dead000000000002 [ 39.587198] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4c1501 [ 39.588108] page dumped because: kasan: bad access detected [ 39.588774] [ 39.588990] Memory state around the buggy address: [ 39.589570] ffff88800d41ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.590427] ffff88800d41ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.591294] >ffff88800d41ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.592141] ^ [ 39.592966] ffff88800d41ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.593822] ffff88800d41ae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.594689] ================================================================== [ 39.595876] Disabling lock debugging due to kernel taint [ 41.185857] BUG: Bad rss-counter state mm:00000000ead7581b type:MM_FILEPAGES val:33 [ 41.186402] BUG: Bad rss-counter state mm:00000000ead7581b type:MM_ANONPAGES val:22 [ 41.598825] BUG: Bad rss-counter state mm:000000008b4e8eda type:MM_FILEPAGES val:33 [ 41.599821] BUG: Bad rss-counter state mm:000000008b4e8eda type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52864' (ECDSA) to the list of known hosts. 2023/06/19 12:15:39 fuzzer started 2023/06/19 12:15:40 dialing manager at localhost:44161 2023/06/19 12:15:40 checking machine... 2023/06/19 12:15:40 checking revisions... [ 42.356375] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:15:40 testing simple program... [ 42.396687] cgroup: Unknown subsys name 'net' [ 42.450319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:15:39 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=00007f23b634b830 CR3=000000000d7f8000 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=078d587905aa9c8e0248a56115a5388a XMM02=000000000011d878d59e07bde36eea69 XMM03=000000000011d9a0ec2efd57dc4c00df XMM04=64d5d60b585a512e00000000000ae988 XMM05=f5441c8fb8ed58f50000000000135010 XMM06=806171799158d9670000000000133a90 XMM07=fb795ef6d65770560000000000124360 XMM08=2c67c8bc2e329bc3000000000011d9a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83639305 RDX=0000000000026393 RSI=0000000000026393 RDI=ffffffff86580a0c RBP=ffff8880197476d8 RSP=ffff888019747610 R8 =0000000000000000 R9 =ffff8880197476c0 R10=0000000000038001 R11=0000000000091be7 R12=ffff8880197476e0 R13=ffff8880197476c8 R14=ffff8880197476c1 R15=ffff888019747680 RIP=ffffffff8113077a RFL=00000217 [----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 00007fa66d890900 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=00007ffee40c4000 CR3=00000000169f8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000