syzkaller login: [ 30.766499] BUG: Bad rss-counter state mm:000000001cb52267 type:MM_FILEPAGES val:33 [ 30.767404] BUG: Bad rss-counter state mm:000000001cb52267 type:MM_ANONPAGES val:22 [ 30.933167] ================================================================== [ 30.934095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.935054] Read of size 8 at addr ffff888018ab1228 by task sshd/220 [ 30.935838] [ 30.936061] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.937147] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.938130] Call Trace: [ 30.938452] [ 30.938794] dump_stack_lvl+0x91/0xf0 [ 30.939288] print_report+0xcc/0x620 [ 30.939786] ? __virt_addr_valid+0x102/0x340 [ 30.940352] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.940995] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.941619] kasan_report+0xbe/0xf0 [ 30.942101] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.942737] vma_interval_tree_remove+0xc75/0xec0 [ 30.943362] vma_prepare+0xc54/0x11a0 [ 30.943846] __split_vma+0x5af/0x950 [ 30.944317] ? __pfx___split_vma+0x10/0x10 [ 30.944849] ? find_held_lock+0x2c/0x110 [ 30.945373] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.945937] ? lock_is_held_type+0x9f/0x120 [ 30.946482] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.947093] ? mtree_range_walk+0x632/0x900 [ 30.947652] ? mas_walk+0x5c7/0x7c0 [ 30.948131] do_vmi_munmap+0x1f1/0x2b0 [ 30.948632] mmap_region+0x1f9/0x2660 [ 30.949117] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.949627] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.950359] ? __pfx_lock_acquire+0x10/0x10 [ 30.950928] ? __pfx_mmap_region+0x10/0x10 [ 30.951472] ? security_mmap_addr+0x7d/0xa0 [ 30.952011] ? get_unmapped_area+0x1f5/0x3f0 [ 30.952566] do_mmap+0x854/0xf00 [ 30.953015] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.953509] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.954081] ksys_mmap_pgoff+0x3af/0x500 [ 30.954605] do_syscall_64+0x3f/0x90 [ 30.955091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.955739] RIP: 0033:0x7fae94ac9d82 [ 30.956200] 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 [ 30.958324] RSP: 002b:00007ffed1b55508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.959240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae94ac9d82 [ 30.960084] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae93f03000 [ 30.960958] RBP: 00007fae93f03000 R08: 0000000000000009 R09: 0000000000001000 [ 30.961812] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b08984dec0 [ 30.962682] R13: 00007ffed1b55520 R14: 00007ffed1b55550 R15: 00007ffed1b558b0 [ 30.963559] [ 30.963859] [ 30.964071] Allocated by task 213: [ 30.964496] kasan_save_stack+0x22/0x50 [ 30.964996] kasan_set_track+0x25/0x30 [ 30.965504] __kasan_slab_alloc+0x59/0x70 [ 30.966032] kmem_cache_alloc+0x16b/0x370 [ 30.966562] vm_area_dup+0x20/0x160 [ 30.967024] __split_vma+0x170/0x950 [ 30.967486] split_vma+0xc6/0x110 [ 30.967927] mprotect_fixup+0x8d2/0xb30 [ 30.968435] do_mprotect_pkey+0x87e/0xd40 [ 30.968949] __x64_sys_mprotect+0x78/0xc0 [ 30.969478] do_syscall_64+0x3f/0x90 [ 30.969954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.970626] [ 30.970843] Freed by task 13: [ 30.971233] kasan_save_stack+0x22/0x50 [ 30.971735] kasan_set_track+0x25/0x30 [ 30.972235] kasan_save_free_info+0x2b/0x50 [ 30.972761] __kasan_slab_free+0x10a/0x190 [ 30.973293] kmem_cache_free+0x10d/0x4d0 [ 30.973799] rcu_core+0x8c8/0x2860 [ 30.974242] __do_softirq+0x1b7/0x7d4 [ 30.974733] [ 30.974949] Last potentially related work creation: [ 30.975535] kasan_save_stack+0x22/0x50 [ 30.976038] __kasan_record_aux_stack+0x8e/0xa0 [ 30.976611] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.977255] remove_vma+0x139/0x170 [ 30.977807] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.978367] do_vmi_munmap+0x1f1/0x2b0 [ 30.978862] __vm_munmap+0x138/0x3a0 [ 30.979327] __x64_sys_munmap+0x59/0x80 [ 30.979820] do_syscall_64+0x3f/0x90 [ 30.980293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.980938] [ 30.981151] The buggy address belongs to the object at ffff888018ab11d0 [ 30.981151] which belongs to the cache vm_area_struct of size 168 [ 30.982624] The buggy address is located 88 bytes inside of [ 30.982624] freed 168-byte region [ffff888018ab11d0, ffff888018ab1278) [ 30.984015] [ 30.984233] The buggy address belongs to the physical page: [ 30.984880] page:00000000e163c608 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ab1 [ 30.985974] memcg:ffff88800a0d1d01 [ 30.986400] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.987050] page_type: 0xffffffff() [ 30.987501] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.988414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a0d1d01 [ 30.989320] page dumped because: kasan: bad access detected [ 30.989980] [ 30.990196] Memory state around the buggy address: [ 30.990800] ffff888018ab1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.991645] ffff888018ab1180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.992486] >ffff888018ab1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.993325] ^ [ 30.993876] ffff888018ab1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.994747] ffff888018ab1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.995603] ================================================================== [ 30.996573] Disabling lock debugging due to kernel taint [ 33.729116] BUG: Bad rss-counter state mm:00000000e969995c type:MM_FILEPAGES val:33 [ 33.730786] BUG: Bad rss-counter state mm:00000000e969995c type:MM_ANONPAGES val:22 [ 34.190757] BUG: Bad rss-counter state mm:000000006b68eeab type:MM_FILEPAGES val:33 [ 34.191733] BUG: Bad rss-counter state mm:000000006b68eeab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21153' (ECDSA) to the list of known hosts. 2023/06/21 04:09:57 fuzzer started 2023/06/21 04:09:57 dialing manager at localhost:36067 2023/06/21 04:09:57 checking machine... 2023/06/21 04:09:57 checking revisions... [ 34.924742] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:09:57 testing simple program... [ 34.971363] cgroup: Unknown subsys name 'net' [ 35.029700] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:09:56 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88801b9318c0 RCX=ffffffff844f5e59 RDX=ffff888009501b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff8880095171a0 RSP=ffff8880095170c8 R8 =0000000000000006 R9 =0000000000000564 R10=000000000003ffff R11=0000000000000128 R12=000000000003ffff R13=ffff88801b9318c2 R14=ffffffffffffffff R15=0000000000000564 RIP=ffffffff814c086b RFL=00000297 [--S-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 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=00007fff3479f908 CR3=0000000005482000 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=00007fc2df0e8510000055d1bbb1b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001cd1ece RCX=ffffffff85d3e490 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88800e68f660 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856cd6a0 R15=0000000000000000 RIP=ffffffff812d8f3d 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 00007f208f9f8900 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=00007ffd279ef000 CR3=000000001462a000 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