syzkaller login: [ 30.517621] BUG: Bad rss-counter state mm:0000000032b64591 type:MM_FILEPAGES val:33 [ 30.518593] BUG: Bad rss-counter state mm:0000000032b64591 type:MM_ANONPAGES val:22 [ 30.675620] ================================================================== [ 30.676483] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.677369] Read of size 8 at addr ffff8880100e23f8 by task sshd/220 [ 30.678098] [ 30.678309] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.679286] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.680192] Call Trace: [ 30.680492] [ 30.680768] dump_stack_lvl+0x91/0xf0 [ 30.681258] print_report+0xcc/0x620 [ 30.681717] ? __virt_addr_valid+0x102/0x340 [ 30.682234] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.682829] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.683409] kasan_report+0xbe/0xf0 [ 30.683854] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.684443] vma_interval_tree_remove+0xc75/0xec0 [ 30.685010] vma_prepare+0xc54/0x11a0 [ 30.685464] __split_vma+0x5af/0x950 [ 30.685922] ? __pfx___split_vma+0x10/0x10 [ 30.686451] ? find_held_lock+0x2c/0x110 [ 30.686967] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.687532] ? lock_is_held_type+0x9f/0x120 [ 30.688071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.688668] ? mtree_range_walk+0x632/0x900 [ 30.689227] ? mas_walk+0x5c7/0x7c0 [ 30.689699] do_vmi_munmap+0x1f1/0x2b0 [ 30.690193] mmap_region+0x1f9/0x2660 [ 30.690691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.691208] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.691920] ? __pfx_lock_acquire+0x10/0x10 [ 30.692450] ? __pfx_mmap_region+0x10/0x10 [ 30.692972] ? security_mmap_addr+0x7d/0xa0 [ 30.693494] ? get_unmapped_area+0x1f5/0x3f0 [ 30.694044] do_mmap+0x854/0xf00 [ 30.694484] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.694993] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.695559] ksys_mmap_pgoff+0x3af/0x500 [ 30.696066] do_syscall_64+0x3f/0x90 [ 30.696539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.697177] RIP: 0033:0x7f124e6f9d82 [ 30.697632] 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 [ 30.699767] RSP: 002b:00007fffb646d468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.700673] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f124e6f9d82 [ 30.701519] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f124db33000 [ 30.702367] RBP: 00007f124db33000 R08: 0000000000000009 R09: 0000000000001000 [ 30.703236] R10: 0000000000000812 R11: 0000000000000206 R12: 000055570e165ec0 [ 30.704086] R13: 00007fffb646d480 R14: 00007fffb646d4b0 R15: 00007fffb646d810 [ 30.704943] [ 30.705234] [ 30.705452] Allocated by task 213: [ 30.705883] kasan_save_stack+0x22/0x50 [ 30.706386] kasan_set_track+0x25/0x30 [ 30.706896] __kasan_slab_alloc+0x59/0x70 [ 30.707417] kmem_cache_alloc+0x16b/0x370 [ 30.707924] vm_area_dup+0x20/0x160 [ 30.708379] __split_vma+0x170/0x950 [ 30.708850] split_vma+0xc6/0x110 [ 30.709292] mprotect_fixup+0x8d2/0xb30 [ 30.709786] do_mprotect_pkey+0x87e/0xd40 [ 30.710317] __x64_sys_mprotect+0x78/0xc0 [ 30.710848] do_syscall_64+0x3f/0x90 [ 30.711322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.711962] [ 30.712183] Freed by task 213: [ 30.712581] kasan_save_stack+0x22/0x50 [ 30.713079] kasan_set_track+0x25/0x30 [ 30.713576] kasan_save_free_info+0x2b/0x50 [ 30.714104] __kasan_slab_free+0x10a/0x190 [ 30.714658] kmem_cache_free+0x10d/0x4d0 [ 30.715171] rcu_core+0x8c8/0x2860 [ 30.715616] __do_softirq+0x1b7/0x7d4 [ 30.716093] [ 30.716313] Last potentially related work creation: [ 30.716892] kasan_save_stack+0x22/0x50 [ 30.717408] __kasan_record_aux_stack+0x8e/0xa0 [ 30.717978] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.718634] remove_vma+0x139/0x170 [ 30.719096] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.719663] do_vmi_munmap+0x1f1/0x2b0 [ 30.720157] __vm_munmap+0x138/0x3a0 [ 30.720620] __x64_sys_munmap+0x59/0x80 [ 30.721118] do_syscall_64+0x3f/0x90 [ 30.721589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722238] [ 30.722455] The buggy address belongs to the object at ffff8880100e23a0 [ 30.722455] which belongs to the cache vm_area_struct of size 168 [ 30.723940] The buggy address is located 88 bytes inside of [ 30.723940] freed 168-byte region [ffff8880100e23a0, ffff8880100e2448) [ 30.725360] [ 30.725578] The buggy address belongs to the physical page: [ 30.726240] page:000000000d4c6938 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100e2 [ 30.727339] memcg:ffff8880169c5f01 [ 30.727773] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.728424] page_type: 0xffffffff() [ 30.728872] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.729790] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169c5f01 [ 30.730714] page dumped because: kasan: bad access detected [ 30.731387] [ 30.731604] Memory state around the buggy address: [ 30.732178] ffff8880100e2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.733024] ffff8880100e2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.733889] >ffff8880100e2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.734759] ^ [ 30.735607] ffff8880100e2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.736455] ffff8880100e2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.737299] ================================================================== [ 30.738447] Disabling lock debugging due to kernel taint [ 32.885405] BUG: Bad rss-counter state mm:000000000963ed8f type:MM_FILEPAGES val:33 [ 32.886420] BUG: Bad rss-counter state mm:000000000963ed8f type:MM_ANONPAGES val:22 [ 33.274114] BUG: Bad rss-counter state mm:000000001f1a4ac7 type:MM_FILEPAGES val:33 [ 33.275288] BUG: Bad rss-counter state mm:000000001f1a4ac7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20872' (ECDSA) to the list of known hosts. 2023/06/20 23:28:35 fuzzer started 2023/06/20 23:28:36 dialing manager at localhost:36067 2023/06/20 23:28:36 checking machine... 2023/06/20 23:28:36 checking revisions... [ 33.979636] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:28:36 testing simple program... [ 34.030750] cgroup: Unknown subsys name 'net' [ 34.089187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:28:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a78 RCX=0000000000000001 RDX=1ffff1100d9c135a RSI=ffff888016387b38 RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a60 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000002481f R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff888019c80000 R15=ffff88800dad1d80 RIP=ffffffff8113038e RFL=00000246 [---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 00007fc643e17900 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=00007fc6443cc650 CR3=000000000e42e000 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=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=0000000000000000 RSI=ffffffff81846194 RDI=ffff888014737440 RBP=ffff8880147374d8 RSP=ffff888014737430 R8 =ffffffff860d825a R9 =ffff888014737480 R10=0000000000038001 R11=0000000000010b8d R12=ffff888014737508 R13=0000000000000000 R14=ffff888014603680 R15=ffff88801633a850 RIP=ffffffff811305e0 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 00007f92509b9900 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=00007f924fed8000 CR3=000000000ce2e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=14280a2e9596cc1c00000000000ae988 XMM05=31e59ebcdcc94ae60000000000133f10 XMM06=4fda316b135da52b0000000000132d00 XMM07=fb795ef6d65770560000000000122f88 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000