syzkaller login: [ 38.682981] BUG: Bad rss-counter state mm:000000005a467de8 type:MM_FILEPAGES val:33 [ 38.684399] BUG: Bad rss-counter state mm:000000005a467de8 type:MM_ANONPAGES val:22 [ 38.833968] ================================================================== [ 38.834887] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.835861] Read of size 8 at addr ffff88800e4f54e0 by task sshd/219 [ 38.836642] [ 38.836867] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.837889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.838866] Call Trace: [ 38.839185] [ 38.839468] dump_stack_lvl+0x91/0xf0 [ 38.839987] print_report+0xcc/0x620 [ 38.840481] ? __virt_addr_valid+0x102/0x340 [ 38.841045] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.841678] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.842298] kasan_report+0xbe/0xf0 [ 38.842775] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.843392] vma_interval_tree_remove+0xc75/0xec0 [ 38.843992] vma_prepare+0xc54/0x11a0 [ 38.844485] __split_vma+0x5af/0x950 [ 38.844962] ? __pfx___split_vma+0x10/0x10 [ 38.845497] ? find_held_lock+0x2c/0x110 [ 38.846055] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.846630] ? lock_is_held_type+0x9f/0x120 [ 38.847163] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.847765] ? mtree_range_walk+0x632/0x900 [ 38.848320] ? mas_walk+0x5c7/0x7c0 [ 38.848799] do_vmi_munmap+0x1f1/0x2b0 [ 38.849286] mmap_region+0x1f9/0x2660 [ 38.849774] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.850280] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.850987] ? __pfx_lock_acquire+0x10/0x10 [ 38.851517] ? __pfx_mmap_region+0x10/0x10 [ 38.852043] ? security_mmap_addr+0x7d/0xa0 [ 38.852570] ? get_unmapped_area+0x1f5/0x3f0 [ 38.853123] do_mmap+0x854/0xf00 [ 38.853560] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.854069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.854631] ksys_mmap_pgoff+0x3af/0x500 [ 38.855145] do_syscall_64+0x3f/0x90 [ 38.855624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.856265] RIP: 0033:0x7f1d47be5d82 [ 38.856719] 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 [ 38.858860] RSP: 002b:00007ffcead871c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.859763] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d47be5d82 [ 38.860629] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d4701f000 [ 38.861478] RBP: 00007f1d4701f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.862336] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc920e4ec0 [ 38.863194] R13: 00007ffcead871e0 R14: 00007ffcead87210 R15: 00007ffcead87570 [ 38.864058] [ 38.864350] [ 38.864565] Allocated by task 212: [ 38.865004] kasan_save_stack+0x22/0x50 [ 38.865518] kasan_set_track+0x25/0x30 [ 38.866018] __kasan_slab_alloc+0x59/0x70 [ 38.866538] kmem_cache_alloc+0x16b/0x370 [ 38.867048] vm_area_dup+0x20/0x160 [ 38.867499] __split_vma+0x170/0x950 [ 38.867957] split_vma+0xc6/0x110 [ 38.868388] mprotect_fixup+0x8d2/0xb30 [ 38.868910] do_mprotect_pkey+0x87e/0xd40 [ 38.869449] __x64_sys_mprotect+0x78/0xc0 [ 38.869998] do_syscall_64+0x3f/0x90 [ 38.870496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871165] [ 38.871381] Freed by task 212: [ 38.871776] kasan_save_stack+0x22/0x50 [ 38.872279] kasan_set_track+0x25/0x30 [ 38.872782] kasan_save_free_info+0x2b/0x50 [ 38.873312] __kasan_slab_free+0x10a/0x190 [ 38.873847] kmem_cache_free+0x10d/0x4d0 [ 38.874363] rcu_core+0x8c8/0x2860 [ 38.874804] __do_softirq+0x1b7/0x7d4 [ 38.875275] [ 38.875488] Last potentially related work creation: [ 38.876068] kasan_save_stack+0x22/0x50 [ 38.876566] __kasan_record_aux_stack+0x8e/0xa0 [ 38.877135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.877783] remove_vma+0x139/0x170 [ 38.878285] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.878840] do_vmi_munmap+0x1f1/0x2b0 [ 38.879330] __vm_munmap+0x138/0x3a0 [ 38.879790] __x64_sys_munmap+0x59/0x80 [ 38.880284] do_syscall_64+0x3f/0x90 [ 38.880757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.881397] [ 38.881611] The buggy address belongs to the object at ffff88800e4f5488 [ 38.881611] which belongs to the cache vm_area_struct of size 168 [ 38.883085] The buggy address is located 88 bytes inside of [ 38.883085] freed 168-byte region [ffff88800e4f5488, ffff88800e4f5530) [ 38.884490] [ 38.884703] The buggy address belongs to the physical page: [ 38.885360] page:00000000ace48e5e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4f5 [ 38.886435] memcg:ffff88800ef54c01 [ 38.886858] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.887505] page_type: 0xffffffff() [ 38.887958] raw: 0100000000000200 ffff8880087a0c80 ffffea000039fa00 dead000000000006 [ 38.888895] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef54c01 [ 38.889857] page dumped because: kasan: bad access detected [ 38.890517] [ 38.890731] Memory state around the buggy address: [ 38.891313] ffff88800e4f5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.892156] ffff88800e4f5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.893005] >ffff88800e4f5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.893859] ^ [ 38.894612] ffff88800e4f5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 38.895468] ffff88800e4f5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.896312] ================================================================== [ 38.897220] Disabling lock debugging due to kernel taint [ 40.845166] BUG: Bad rss-counter state mm:00000000534f06f5 type:MM_FILEPAGES val:33 [ 40.846249] BUG: Bad rss-counter state mm:00000000534f06f5 type:MM_ANONPAGES val:22 [ 41.316855] BUG: Bad rss-counter state mm:00000000a1147697 type:MM_FILEPAGES val:33 [ 41.318137] BUG: Bad rss-counter state mm:00000000a1147697 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9964' (ECDSA) to the list of known hosts. 2023/06/21 01:09:51 fuzzer started 2023/06/21 01:09:51 dialing manager at localhost:36067 2023/06/21 01:09:51 checking machine... 2023/06/21 01:09:51 checking revisions... [ 42.003648] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:09:52 testing simple program... [ 42.045410] cgroup: Unknown subsys name 'net' [ 42.095427] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:09:51 Registers: info registers vcpu 0 RAX=0000000000006ca9 RBX=ffffffff85d3e490 RCX=1ffffffff0ba7a85 RDX=00000000fffc0b6f RSI=0000000000000000 RDI=ffffffff8542aab4 RBP=ffff88806ce3a2d8 RSP=ffff88806ce09c58 R8 =00000000fffda594 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000001c0b83df70 R12=ffffffff85d3d41c R13=ffff88806ce3a2c0 R14=1ffff1100d9c139c R15=0000000000000000 RIP=ffffffff8137cc71 RFL=00000046 [---Z-P-] 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 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=00007fcb8dc468a0 CR3=000000000e1ca000 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=2031353a39303a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a39303a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e647720 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806cf09d78 RBP=1ffff1100d9e13ab RSP=ffff88806cf09d50 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6d53 R12=ffff88800e647728 R13=ffff88800e647730 R14=ffffffff813782f8 R15=ffff88800e9ad8a0 RIP=ffffffff812e0146 RFL=00000046 [---Z-P-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f260fe49900 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=00007f26105bb3ec CR3=00000000198ee000 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