syzkaller login: [ 35.774619] BUG: Bad rss-counter state mm:00000000b8b15bd3 type:MM_FILEPAGES val:33 [ 35.775852] BUG: Bad rss-counter state mm:00000000b8b15bd3 type:MM_ANONPAGES val:22 [ 35.811898] ================================================================== [ 35.812806] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.813863] Read of size 8 at addr ffff888016896140 by task sshd/219 [ 35.814635] [ 35.814854] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.815717] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.816706] Call Trace: [ 35.817033] [ 35.817321] dump_stack_lvl+0x91/0xf0 [ 35.817820] print_report+0xcc/0x620 [ 35.818303] ? __virt_addr_valid+0x102/0x340 [ 35.818856] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.819486] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.820111] kasan_report+0xbe/0xf0 [ 35.820592] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.821215] vma_interval_tree_remove+0xc75/0xec0 [ 35.821837] vma_prepare+0xc54/0x11a0 [ 35.822328] __split_vma+0x5af/0x950 [ 35.822804] ? __pfx___split_vma+0x10/0x10 [ 35.823345] ? find_held_lock+0x2c/0x110 [ 35.823875] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.824454] ? lock_is_held_type+0x9f/0x120 [ 35.825009] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.825626] ? mtree_range_walk+0x632/0x900 [ 35.826196] ? mas_walk+0x5c7/0x7c0 [ 35.826678] do_vmi_munmap+0x1f1/0x2b0 [ 35.827173] mmap_region+0x1f9/0x2660 [ 35.827660] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.828175] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.828904] ? __pfx_lock_acquire+0x10/0x10 [ 35.829439] ? __pfx_mmap_region+0x10/0x10 [ 35.829998] ? security_mmap_addr+0x7d/0xa0 [ 35.830529] ? get_unmapped_area+0x1f5/0x3f0 [ 35.831087] do_mmap+0x854/0xf00 [ 35.831526] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.832019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.832586] ksys_mmap_pgoff+0x3af/0x500 [ 35.833098] do_syscall_64+0x3f/0x90 [ 35.833578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.834247] RIP: 0033:0x7f0a3e6ced82 [ 35.834707] 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 [ 35.836849] RSP: 002b:00007fffbfb7d4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.837771] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a3e6ced82 [ 35.838634] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a3db08000 [ 35.839503] RBP: 00007f0a3db08000 R08: 0000000000000009 R09: 0000000000001000 [ 35.840377] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d959f90980 [ 35.841227] R13: 00007fffbfb7d510 R14: 00007fffbfb7d540 R15: 00007fffbfb7d8a0 [ 35.842127] [ 35.842421] [ 35.842635] Allocated by task 212: [ 35.843071] kasan_save_stack+0x22/0x50 [ 35.843582] kasan_set_track+0x25/0x30 [ 35.844090] __kasan_slab_alloc+0x59/0x70 [ 35.844620] kmem_cache_alloc+0x16b/0x370 [ 35.845149] vm_area_dup+0x20/0x160 [ 35.845610] __split_vma+0x170/0x950 [ 35.846096] split_vma+0xc6/0x110 [ 35.846549] mprotect_fixup+0x8d2/0xb30 [ 35.847061] do_mprotect_pkey+0x87e/0xd40 [ 35.847585] __x64_sys_mprotect+0x78/0xc0 [ 35.848113] do_syscall_64+0x3f/0x90 [ 35.848589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.849246] [ 35.849474] Freed by task 212: [ 35.849880] kasan_save_stack+0x22/0x50 [ 35.850392] kasan_set_track+0x25/0x30 [ 35.850894] kasan_save_free_info+0x2b/0x50 [ 35.851435] __kasan_slab_free+0x10a/0x190 [ 35.851984] kmem_cache_free+0x10d/0x4d0 [ 35.852509] rcu_core+0x8c8/0x2860 [ 35.852960] __do_softirq+0x1b7/0x7d4 [ 35.853439] [ 35.853655] Last potentially related work creation: [ 35.854261] kasan_save_stack+0x22/0x50 [ 35.854785] __kasan_record_aux_stack+0x8e/0xa0 [ 35.855377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.856047] remove_vma+0x139/0x170 [ 35.856506] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.857069] do_vmi_munmap+0x1f1/0x2b0 [ 35.857565] __vm_munmap+0x138/0x3a0 [ 35.858045] __x64_sys_munmap+0x59/0x80 [ 35.858552] do_syscall_64+0x3f/0x90 [ 35.859040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.859683] [ 35.859904] The buggy address belongs to the object at ffff8880168960e8 [ 35.859904] which belongs to the cache vm_area_struct of size 168 [ 35.861392] The buggy address is located 88 bytes inside of [ 35.861392] freed 168-byte region [ffff8880168960e8, ffff888016896190) [ 35.862842] [ 35.863061] The buggy address belongs to the physical page: [ 35.863722] page:000000002cac6afc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16896 [ 35.864842] memcg:ffff88801442c401 [ 35.865280] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.865937] page_type: 0xffffffff() [ 35.866398] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.867335] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801442c401 [ 35.868252] page dumped because: kasan: bad access detected [ 35.868917] [ 35.869133] Memory state around the buggy address: [ 35.869732] ffff888016896000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.870612] ffff888016896080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.871485] >ffff888016896100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.872349] ^ [ 35.872998] ffff888016896180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.873880] ffff888016896200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.874752] ================================================================== [ 35.875929] Disabling lock debugging due to kernel taint [ 37.769764] BUG: Bad rss-counter state mm:00000000addb0cb2 type:MM_FILEPAGES val:33 [ 37.770690] BUG: Bad rss-counter state mm:00000000addb0cb2 type:MM_ANONPAGES val:22 [ 38.136647] BUG: Bad rss-counter state mm:00000000ea367ce1 type:MM_FILEPAGES val:33 [ 38.137610] BUG: Bad rss-counter state mm:00000000ea367ce1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57692' (ECDSA) to the list of known hosts. 2023/06/20 06:17:34 fuzzer started 2023/06/20 06:17:34 dialing manager at localhost:44161 2023/06/20 06:17:34 checking machine... 2023/06/20 06:17:34 checking revisions... [ 38.865260] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:17:34 testing simple program... [ 38.919349] cgroup: Unknown subsys name 'net' [ 38.970636] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:17:29 Registers: info registers vcpu 0 RAX=00007fb5e4f87000 RBX=00007ffd1dec5db0 RCX=00007ffd1dec5cf0 RDX=0000000000000014 RSI=000000000000002c RDI=00007fb5e578d060 RBP=00007ffd1dec5ee0 RSP=00007ffd1dec5c50 R8 =00005577a4aca810 R9 =00007ffd1dec5de0 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=00007fb5e57769de RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb5e4beb900 00000000 00000000 GS =0000 0000000000000000 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=00007fb5e4f873ec CR3=000000000d9c0000 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=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 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=0000000000000001 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=00007fb4bddef000 CR3=0000000015e20000 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=2034333a37313a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a37313a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000