[ 32.421789] BUG: Bad rss-counter state mm:000000008f039afa type:MM_FILEPAGES val:33 [ 32.422400] BUG: Bad rss-counter state mm:000000008f039afa type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.520312] ================================================================== [ 32.520805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.521329] Read of size 8 at addr ffff88800e27fdf0 by task sshd/219 [ 32.521753] [ 32.521876] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.522353] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.522906] Call Trace: [ 32.523086] [ 32.523242] dump_stack_lvl+0x91/0xf0 [ 32.523513] print_report+0xcc/0x620 [ 32.523783] ? __virt_addr_valid+0x102/0x340 [ 32.524087] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.524428] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.524767] kasan_report+0xbe/0xf0 [ 32.525028] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.525368] vma_interval_tree_remove+0xc75/0xec0 [ 32.525843] vma_prepare+0xc54/0x11a0 [ 32.526184] __split_vma+0x5af/0x950 [ 32.526440] ? __pfx___split_vma+0x10/0x10 [ 32.526744] ? find_held_lock+0x2c/0x110 [ 32.527036] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.527342] ? lock_is_held_type+0x9f/0x120 [ 32.527638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.527972] ? mtree_range_walk+0x632/0x900 [ 32.528294] ? mas_walk+0x5c7/0x7c0 [ 32.528557] do_vmi_munmap+0x1f1/0x2b0 [ 32.528826] mmap_region+0x1f9/0x2660 [ 32.529091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.529369] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.529780] ? __pfx_lock_acquire+0x10/0x10 [ 32.530097] ? __pfx_mmap_region+0x10/0x10 [ 32.530414] ? security_mmap_addr+0x7d/0xa0 [ 32.530741] ? get_unmapped_area+0x1f5/0x3f0 [ 32.531070] do_mmap+0x854/0xf00 [ 32.531332] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.531624] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.531950] ksys_mmap_pgoff+0x3af/0x500 [ 32.532246] do_syscall_64+0x3f/0x90 [ 32.532524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.532909] RIP: 0033:0x7f91913ebd82 [ 32.533181] 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 [ 32.534455] RSP: 002b:00007ffdb2ee65a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.535005] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91913ebd82 [ 32.535512] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9190825000 [ 32.536021] RBP: 00007f9190825000 R08: 0000000000000009 R09: 0000000000001000 [ 32.536529] R10: 0000000000000812 R11: 0000000000000206 R12: 000056105c1fbb20 [ 32.537027] R13: 00007ffdb2ee65c0 R14: 00007ffdb2ee65f0 R15: 00007ffdb2ee6950 [ 32.537545] [ 32.537721] [ 32.537847] Allocated by task 212: [ 32.538103] kasan_save_stack+0x22/0x50 [ 32.538399] kasan_set_track+0x25/0x30 [ 32.538689] __kasan_slab_alloc+0x59/0x70 [ 32.538988] kmem_cache_alloc+0x16b/0x370 [ 32.539294] vm_area_dup+0x20/0x160 [ 32.539567] __split_vma+0x170/0x950 [ 32.539834] split_vma+0xc6/0x110 [ 32.540088] mprotect_fixup+0x8d2/0xb30 [ 32.540376] do_mprotect_pkey+0x87e/0xd40 [ 32.540673] __x64_sys_mprotect+0x78/0xc0 [ 32.540968] do_syscall_64+0x3f/0x90 [ 32.541249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.541617] [ 32.541746] Freed by task 0: [ 32.541968] kasan_save_stack+0x22/0x50 [ 32.542256] kasan_set_track+0x25/0x30 [ 32.542549] kasan_save_free_info+0x2b/0x50 [ 32.542855] __kasan_slab_free+0x10a/0x190 [ 32.543167] kmem_cache_free+0x10d/0x4d0 [ 32.543459] rcu_core+0x8c8/0x2860 [ 32.543725] __do_softirq+0x1b7/0x7d4 [ 32.543999] [ 32.544121] Last potentially related work creation: [ 32.544463] kasan_save_stack+0x22/0x50 [ 32.544759] __kasan_record_aux_stack+0x8e/0xa0 [ 32.545098] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.545476] remove_vma+0x139/0x170 [ 32.545744] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.546063] do_vmi_munmap+0x1f1/0x2b0 [ 32.546342] __vm_munmap+0x138/0x3a0 [ 32.546621] __x64_sys_munmap+0x59/0x80 [ 32.546910] do_syscall_64+0x3f/0x90 [ 32.547188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.547559] [ 32.547687] The buggy address belongs to the object at ffff88800e27fd98 [ 32.547687] which belongs to the cache vm_area_struct of size 168 [ 32.548562] The buggy address is located 88 bytes inside of [ 32.548562] freed 168-byte region [ffff88800e27fd98, ffff88800e27fe40) [ 32.549385] [ 32.549510] The buggy address belongs to the physical page: [ 32.549900] page:000000002d3b937b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe27f [ 32.550546] memcg:ffff88800cea0401 [ 32.550803] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.551218] page_type: 0xffffffff() [ 32.551479] raw: 0100000000000200 ffff88800879fc80 ffffea000033e7c0 dead000000000003 [ 32.552013] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cea0401 [ 32.552544] page dumped because: kasan: bad access detected [ 32.552932] [ 32.553059] Memory state around the buggy address: [ 32.553404] ffff88800e27fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.553909] ffff88800e27fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.554409] >ffff88800e27fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.554917] ^ [ 32.555392] ffff88800e27fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.555899] ffff88800e27fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.556397] ================================================================== [ 32.556968] Disabling lock debugging due to kernel taint [ 34.556306] BUG: Bad rss-counter state mm:00000000044cd27e type:MM_FILEPAGES val:33 [ 34.557297] BUG: Bad rss-counter state mm:00000000044cd27e type:MM_ANONPAGES val:22 [ 35.108857] BUG: Bad rss-counter state mm:00000000ec65e415 type:MM_FILEPAGES val:33 [ 35.110074] BUG: Bad rss-counter state mm:00000000ec65e415 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60136' (ECDSA) to the list of known hosts. 2023/06/20 00:51:05 fuzzer started 2023/06/20 00:51:05 dialing manager at localhost:44161 2023/06/20 00:51:05 checking machine... 2023/06/20 00:51:05 checking revisions... [ 35.739728] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:51:05 testing simple program... [ 35.786306] cgroup: Unknown subsys name 'net' [ 35.851432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:51:03 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=ffff88806ce09df0 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffff88806ce09b30 RSP=ffff88806ce09a78 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b60 R13=ffff88806ce09ae0 R14=ffff88806ce09de8 R15=ffff88806ce09a98 RIP=ffffffff81130933 RFL=00000296 [--S-AP-] 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=00007fffc7330ce8 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=00007f04e26bd510000055ada2edd790 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=1ffffffff0bbf944 RBX=ffffffff85dfca24 RCX=ffffffff8180c584 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfca20 RSP=ffff88800fe27790 R8 =ffffffff86137508 R9 =ffff88800fe27888 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca28 R13=ffffffff85dfc9fc R14=ffffffff85dfca1c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----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 00007f676ce22900 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=00007f676d3da0b0 CR3=000000001ca80000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000