syzkaller login: [ 30.791551] BUG: Bad rss-counter state mm:0000000073a212aa type:MM_FILEPAGES val:33 [ 30.792786] BUG: Bad rss-counter state mm:0000000073a212aa type:MM_ANONPAGES val:22 [ 30.828085] ================================================================== [ 30.829083] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.830139] Read of size 8 at addr ffff88801a513a50 by task sshd/221 [ 30.830986] [ 30.831245] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.832218] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.833312] Call Trace: [ 30.833644] [ 30.833988] dump_stack_lvl+0x91/0xf0 [ 30.834538] print_report+0xcc/0x620 [ 30.835107] ? __virt_addr_valid+0x102/0x340 [ 30.835718] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836382] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.837097] kasan_report+0xbe/0xf0 [ 30.837639] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.838316] vma_interval_tree_remove+0xc75/0xec0 [ 30.838918] vma_prepare+0xc54/0x11a0 [ 30.839428] __split_vma+0x5af/0x950 [ 30.839973] ? __pfx___split_vma+0x10/0x10 [ 30.840502] ? find_held_lock+0x2c/0x110 [ 30.841016] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.841574] ? lock_is_held_type+0x9f/0x120 [ 30.842116] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.842717] ? mtree_range_walk+0x632/0x900 [ 30.843279] ? mas_walk+0x5c7/0x7c0 [ 30.843750] do_vmi_munmap+0x1f1/0x2b0 [ 30.844235] mmap_region+0x1f9/0x2660 [ 30.844706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.845209] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.845909] ? __pfx_lock_acquire+0x10/0x10 [ 30.846432] ? __pfx_mmap_region+0x10/0x10 [ 30.846961] ? security_mmap_addr+0x7d/0xa0 [ 30.847481] ? get_unmapped_area+0x1f5/0x3f0 [ 30.848027] do_mmap+0x854/0xf00 [ 30.848461] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.848956] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.849510] ksys_mmap_pgoff+0x3af/0x500 [ 30.850014] do_syscall_64+0x3f/0x90 [ 30.850486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851131] RIP: 0033:0x7f21470a1d82 [ 30.851579] 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 [ 30.853658] RSP: 002b:00007ffdb4830de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.854542] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21470a1d82 [ 30.855391] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f21464db000 [ 30.856223] RBP: 00007f21464db000 R08: 0000000000000009 R09: 0000000000001000 [ 30.857055] R10: 0000000000000812 R11: 0000000000000206 R12: 000056434b311ec0 [ 30.857887] R13: 00007ffdb4830e00 R14: 00007ffdb4830e30 R15: 00007ffdb4831190 [ 30.858734] [ 30.859030] [ 30.859241] Allocated by task 214: [ 30.859669] kasan_save_stack+0x22/0x50 [ 30.860165] kasan_set_track+0x25/0x30 [ 30.860653] __kasan_slab_alloc+0x59/0x70 [ 30.861175] kmem_cache_alloc+0x16b/0x370 [ 30.861691] vm_area_dup+0x20/0x160 [ 30.862131] __split_vma+0x170/0x950 [ 30.862587] split_vma+0xc6/0x110 [ 30.863035] mprotect_fixup+0x8d2/0xb30 [ 30.863527] do_mprotect_pkey+0x87e/0xd40 [ 30.864126] __x64_sys_mprotect+0x78/0xc0 [ 30.864638] do_syscall_64+0x3f/0x90 [ 30.865103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.865734] [ 30.865946] Freed by task 204: [ 30.866331] kasan_save_stack+0x22/0x50 [ 30.866824] kasan_set_track+0x25/0x30 [ 30.867319] kasan_save_free_info+0x2b/0x50 [ 30.867840] __kasan_slab_free+0x10a/0x190 [ 30.868362] kmem_cache_free+0x10d/0x4d0 [ 30.868859] rcu_core+0x8c8/0x2860 [ 30.869293] __do_softirq+0x1b7/0x7d4 [ 30.869760] [ 30.869971] Last potentially related work creation: [ 30.870547] kasan_save_stack+0x22/0x50 [ 30.871063] __kasan_record_aux_stack+0x8e/0xa0 [ 30.871628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.872255] remove_vma+0x139/0x170 [ 30.872697] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.873243] do_vmi_munmap+0x1f1/0x2b0 [ 30.873723] __vm_munmap+0x138/0x3a0 [ 30.874181] __x64_sys_munmap+0x59/0x80 [ 30.874669] do_syscall_64+0x3f/0x90 [ 30.875144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.875770] [ 30.875982] The buggy address belongs to the object at ffff88801a5139f8 [ 30.875982] which belongs to the cache vm_area_struct of size 168 [ 30.877418] The buggy address is located 88 bytes inside of [ 30.877418] freed 168-byte region [ffff88801a5139f8, ffff88801a513aa0) [ 30.878786] [ 30.879001] The buggy address belongs to the physical page: [ 30.879645] page:000000002b7c568d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a513 [ 30.880709] memcg:ffff88800d310f01 [ 30.881126] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.881753] page_type: 0xffffffff() [ 30.882193] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.883107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d310f01 [ 30.883999] page dumped because: kasan: bad access detected [ 30.884647] [ 30.884858] Memory state around the buggy address: [ 30.885428] ffff88801a513900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.886264] ffff88801a513980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.887108] >ffff88801a513a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.887938] ^ [ 30.888626] ffff88801a513a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.889463] ffff88801a513b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.890441] ================================================================== [ 30.891481] Disabling lock debugging due to kernel taint [ 32.830746] BUG: Bad rss-counter state mm:00000000a351697f type:MM_FILEPAGES val:33 [ 32.831764] BUG: Bad rss-counter state mm:00000000a351697f type:MM_ANONPAGES val:22 [ 33.297297] BUG: Bad rss-counter state mm:0000000002ce5f70 type:MM_FILEPAGES val:33 [ 33.298310] BUG: Bad rss-counter state mm:0000000002ce5f70 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22313' (ECDSA) to the list of known hosts. 2023/06/21 02:13:46 fuzzer started 2023/06/21 02:13:46 dialing manager at localhost:36067 2023/06/21 02:13:46 checking machine... 2023/06/21 02:13:46 checking revisions... [ 33.938650] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:13:46 testing simple program... [ 33.978344] cgroup: Unknown subsys name 'net' [ 34.031336] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:13:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800cc19130 RCX=ffff88800844f780 RDX=ffffea00003f1dc0 RSI=ffff88800fc77ab0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88801429f808 R8 =ffff88800fc77be0 R9 =0000000000000000 R10=ffffea00003f1dc0 R11=00000000800d0008 R12=dffffc0000000000 R13=ffff88801429f848 R14=ffff88800844f780 R15=ffff88800fc77ab0 RIP=ffffffff81810316 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0fe4bab900 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=00007f0fe40569c0 CR3=000000000c7f8000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=973b67100788e64200000000000ae988 XMM05=d2297fa181f6d68f0000000000132c60 XMM06=e4cb8bb95a7664b60000000000131da8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83c1d1a5 RBX=ffffffff85fe5018 RCX=ffffffff83c1d59f RDX=0000000000000000 RSI=ffffffff86413686 RDI=ffffffff85fe5018 RBP=ffffffff85fe501c RSP=ffff88800f267298 R8 =ffffffff86413686 R9 =ffff88800f267390 R10=0000000000038001 R11=000000000009a995 R12=ffffffff85fe5018 R13=ffffffff85fe5018 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f5d40967900 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=00007f5d40f1c650 CR3=000000000eeb2000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000