syzkaller login: [ 57.822262] BUG: Bad rss-counter state mm:000000009e01540a type:MM_FILEPAGES val:33 [ 57.822942] BUG: Bad rss-counter state mm:000000009e01540a type:MM_ANONPAGES val:22 [ 57.854089] ================================================================== [ 57.854863] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.855510] Read of size 8 at addr ffff88801684a310 by task sshd/219 [ 57.856049] [ 57.856193] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.856758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.857407] Call Trace: [ 57.857620] [ 57.857810] dump_stack_lvl+0x91/0xf0 [ 57.858140] print_report+0xcc/0x620 [ 57.858477] ? __virt_addr_valid+0x102/0x340 [ 57.858850] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.859322] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.859740] kasan_report+0xbe/0xf0 [ 57.860057] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.860500] vma_interval_tree_remove+0xc75/0xec0 [ 57.860913] vma_prepare+0xc54/0x11a0 [ 57.861232] __split_vma+0x5af/0x950 [ 57.861563] ? __pfx___split_vma+0x10/0x10 [ 57.861927] ? find_held_lock+0x2c/0x110 [ 57.862277] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.862646] ? lock_is_held_type+0x9f/0x120 [ 57.863002] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.863442] ? mtree_range_walk+0x632/0x900 [ 57.863811] ? mas_walk+0x5c7/0x7c0 [ 57.864128] do_vmi_munmap+0x1f1/0x2b0 [ 57.864460] mmap_region+0x1f9/0x2660 [ 57.864783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.865114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.865578] ? __pfx_lock_acquire+0x10/0x10 [ 57.865902] ? __pfx_mmap_region+0x10/0x10 [ 57.866242] ? security_mmap_addr+0x7d/0xa0 [ 57.866592] ? get_unmapped_area+0x1f5/0x3f0 [ 57.866952] do_mmap+0x854/0xf00 [ 57.867553] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.867876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.868254] ksys_mmap_pgoff+0x3af/0x500 [ 57.868598] do_syscall_64+0x3f/0x90 [ 57.868920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.869345] RIP: 0033:0x7fbe2cd10d82 [ 57.869660] 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 [ 57.871004] RSP: 002b:00007ffc50cbdb98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.871593] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe2cd10d82 [ 57.872111] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe2c14a000 [ 57.872663] RBP: 00007fbe2c14a000 R08: 0000000000000009 R09: 0000000000001000 [ 57.873201] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f319def70 [ 57.873743] R13: 00007ffc50cbdbb0 R14: 00007ffc50cbdbe0 R15: 00007ffc50cbdf40 [ 57.874317] [ 57.874497] [ 57.874628] Allocated by task 212: [ 57.874892] kasan_save_stack+0x22/0x50 [ 57.875250] kasan_set_track+0x25/0x30 [ 57.875576] __kasan_slab_alloc+0x59/0x70 [ 57.875918] kmem_cache_alloc+0x16b/0x370 [ 57.876233] vm_area_dup+0x20/0x160 [ 57.876528] __split_vma+0x170/0x950 [ 57.876830] split_vma+0xc6/0x110 [ 57.877114] mprotect_fixup+0x8d2/0xb30 [ 57.877435] do_mprotect_pkey+0x87e/0xd40 [ 57.877758] __x64_sys_mprotect+0x78/0xc0 [ 57.878089] do_syscall_64+0x3f/0x90 [ 57.878390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.878793] [ 57.878938] Freed by task 202: [ 57.879240] kasan_save_stack+0x22/0x50 [ 57.879567] kasan_set_track+0x25/0x30 [ 57.879889] kasan_save_free_info+0x2b/0x50 [ 57.880219] __kasan_slab_free+0x10a/0x190 [ 57.880556] kmem_cache_free+0x10d/0x4d0 [ 57.880866] rcu_core+0x8c8/0x2860 [ 57.881143] __do_softirq+0x1b7/0x7d4 [ 57.881449] [ 57.881579] Last potentially related work creation: [ 57.881930] kasan_save_stack+0x22/0x50 [ 57.882237] __kasan_record_aux_stack+0x8e/0xa0 [ 57.882608] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.883015] remove_vma+0x139/0x170 [ 57.883329] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.883680] do_vmi_munmap+0x1f1/0x2b0 [ 57.883993] __vm_munmap+0x138/0x3a0 [ 57.884304] __x64_sys_munmap+0x59/0x80 [ 57.884615] do_syscall_64+0x3f/0x90 [ 57.884901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.885280] [ 57.885416] The buggy address belongs to the object at ffff88801684a2b8 [ 57.885416] which belongs to the cache vm_area_struct of size 168 [ 57.886289] The buggy address is located 88 bytes inside of [ 57.886289] freed 168-byte region [ffff88801684a2b8, ffff88801684a360) [ 57.887128] [ 57.887316] The buggy address belongs to the physical page: [ 57.887727] page:00000000a293ea07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1684a [ 57.888383] memcg:ffff88800e26fc01 [ 57.888641] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.889054] page_type: 0xffffffff() [ 57.889343] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.889917] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e26fc01 [ 57.890455] page dumped because: kasan: bad access detected [ 57.890851] [ 57.890982] Memory state around the buggy address: [ 57.891365] ffff88801684a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 57.891890] ffff88801684a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 57.892446] >ffff88801684a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 57.892996] ^ [ 57.893304] ffff88801684a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 57.893857] ffff88801684a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 57.894565] ================================================================== [ 57.895519] Disabling lock debugging due to kernel taint [ 59.457152] BUG: Bad rss-counter state mm:00000000527534af type:MM_FILEPAGES val:33 [ 59.457902] BUG: Bad rss-counter state mm:00000000527534af type:MM_ANONPAGES val:22 [ 59.823557] BUG: Bad rss-counter state mm:000000003f64826b type:MM_FILEPAGES val:33 [ 59.824336] BUG: Bad rss-counter state mm:000000003f64826b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52276' (ECDSA) to the list of known hosts. 2023/06/20 08:55:58 fuzzer started 2023/06/20 08:55:58 dialing manager at localhost:44161 2023/06/20 08:55:58 checking machine... 2023/06/20 08:55:58 checking revisions... [ 60.401714] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:55:58 testing simple program... [ 60.435044] cgroup: Unknown subsys name 'net' [ 60.469474] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:55:31 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=00007ff1e41906f0 CR3=000000001417e000 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=de574aad4770d18d1948c9e0fc4af819 XMM02=000000000011d010ec2efd57dc4c00df XMM03=00000000001240a89617fa0d5dd81bb4 XMM04=423a5019fa5e359900000000000ae988 XMM05=dfcdbad4f1609c370000000000133b90 XMM06=50fe11a9250046ce00000000001329f8 XMM07=e042d86d42eb936e0000000000124328 XMM08=9617fa0d5dd81bb4000000000011d070 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c283ac RBX=0000000000000001 RCX=ffffffff86141d62 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff8880165d7940 RBP=ffff8880165d7930 RSP=ffff8880165d7868 R8 =ffffffff86141d66 R9 =ffff8880165d7918 R10=0000000000038001 R11=0000000000022999 R12=ffff8880165d7938 R13=ffff8880165d7920 R14=ffff8880165d7e58 R15=ffff8880165d78d8 RIP=ffffffff81131118 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 00007f13deb5f900 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=00007fff6867a000 CR3=000000000ec92000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000