[ 33.649943] BUG: Bad rss-counter state mm:00000000022ebe04 type:MM_FILEPAGES val:33 [ 33.650625] BUG: Bad rss-counter state mm:00000000022ebe04 type:MM_ANONPAGES val:22 [ 33.704402] ================================================================== [ 33.705003] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.705599] Read of size 8 at addr ffff88800c4cea50 by task sshd/221 [ 33.718106] [ 33.718248] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.718802] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.719413] Call Trace: [ 33.719622] [ 33.719816] dump_stack_lvl+0x91/0xf0 [ 33.720142] print_report+0xcc/0x620 [ 33.720462] ? __virt_addr_valid+0x102/0x340 [ 33.720825] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.721214] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.721599] kasan_report+0xbe/0xf0 [ 33.725941] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.726343] vma_interval_tree_remove+0xc75/0xec0 [ 33.726760] vma_prepare+0xc54/0x11a0 [ 33.727096] __split_vma+0x5af/0x950 [ 33.727398] ? __pfx___split_vma+0x10/0x10 [ 33.727734] ? find_held_lock+0x2c/0x110 [ 33.728062] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.728420] ? lock_is_held_type+0x9f/0x120 [ 33.728769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.729154] ? mtree_range_walk+0x632/0x900 [ 33.729506] ? mas_walk+0x5c7/0x7c0 [ 33.737829] do_vmi_munmap+0x1f1/0x2b0 [ 33.738151] mmap_region+0x1f9/0x2660 [ 33.738468] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.738806] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.739263] ? __pfx_lock_acquire+0x10/0x10 [ 33.739608] ? __pfx_mmap_region+0x10/0x10 [ 33.739958] ? security_mmap_addr+0x7d/0xa0 [ 33.740308] ? get_unmapped_area+0x1f5/0x3f0 [ 33.740666] do_mmap+0x854/0xf00 [ 33.740949] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.741265] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.741621] ksys_mmap_pgoff+0x3af/0x500 [ 33.746110] do_syscall_64+0x3f/0x90 [ 33.746405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.746819] RIP: 0033:0x7fceae991d82 [ 33.747122] 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 [ 33.748495] RSP: 002b:00007fffdd5652c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.749080] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fceae991d82 [ 33.749619] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fceaddcb000 [ 33.750188] RBP: 00007fceaddcb000 R08: 0000000000000009 R09: 0000000000001000 [ 33.750728] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d92d47ec0 [ 33.751278] R13: 00007fffdd5652e0 R14: 00007fffdd565310 R15: 00007fffdd565670 [ 33.751828] [ 33.752025] [ 33.752167] Allocated by task 214: [ 33.752447] kasan_save_stack+0x22/0x50 [ 33.752782] kasan_set_track+0x25/0x30 [ 33.753104] __kasan_slab_alloc+0x59/0x70 [ 33.753448] kmem_cache_alloc+0x16b/0x370 [ 33.753805] vm_area_dup+0x20/0x160 [ 33.758100] __split_vma+0x170/0x950 [ 33.758405] split_vma+0xc6/0x110 [ 33.758689] mprotect_fixup+0x8d2/0xb30 [ 33.759016] do_mprotect_pkey+0x87e/0xd40 [ 33.759369] __x64_sys_mprotect+0x78/0xc0 [ 33.759711] do_syscall_64+0x3f/0x90 [ 33.760016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.760423] [ 33.760566] Freed by task 13: [ 33.760821] kasan_save_stack+0x22/0x50 [ 33.761144] kasan_set_track+0x25/0x30 [ 33.761465] kasan_save_free_info+0x2b/0x50 [ 33.765825] __kasan_slab_free+0x10a/0x190 [ 33.766169] kmem_cache_free+0x10d/0x4d0 [ 33.770025] rcu_core+0x8c8/0x2860 [ 33.770321] __do_softirq+0x1b7/0x7d4 [ 33.770629] [ 33.770771] Last potentially related work creation: [ 33.771139] kasan_save_stack+0x22/0x50 [ 33.771462] __kasan_record_aux_stack+0x8e/0xa0 [ 33.771839] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.772260] remove_vma+0x139/0x170 [ 33.772550] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.772908] do_vmi_munmap+0x1f1/0x2b0 [ 33.773217] __vm_munmap+0x138/0x3a0 [ 33.773526] __x64_sys_munmap+0x59/0x80 [ 33.773946] do_syscall_64+0x3f/0x90 [ 33.774251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.774661] [ 33.774805] Second to last potentially related work creation: [ 33.775229] kasan_save_stack+0x22/0x50 [ 33.775554] __kasan_record_aux_stack+0x8e/0xa0 [ 33.775927] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.776338] remove_vma+0x139/0x170 [ 33.776632] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.776987] do_vmi_munmap+0x1f1/0x2b0 [ 33.777302] mmap_region+0x1f9/0x2660 [ 33.777610] do_mmap+0x854/0xf00 [ 33.777930] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.778226] ksys_mmap_pgoff+0x3af/0x500 [ 33.778547] do_syscall_64+0x3f/0x90 [ 33.778864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.779274] [ 33.779417] The buggy address belongs to the object at ffff88800c4ce9f8 [ 33.779417] which belongs to the cache vm_area_struct of size 168 [ 33.780379] The buggy address is located 88 bytes inside of [ 33.780379] freed 168-byte region [ffff88800c4ce9f8, ffff88800c4ceaa0) [ 33.781272] [ 33.781413] The buggy address belongs to the physical page: [ 33.793806] page:0000000087eecace refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4ce [ 33.794514] memcg:ffff88800d1bf201 [ 33.794803] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.795225] page_type: 0xffffffff() [ 33.795523] raw: 0100000000000200 ffff88800879fc80 ffffea00003af800 000000000000000a [ 33.796127] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1bf201 [ 33.796713] page dumped because: kasan: bad access detected [ 33.797181] [ 33.797325] Memory state around the buggy address: [ 33.797703] ffff88800c4ce900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.802629] ffff88800c4ce980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 33.803595] >ffff88800c4cea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.804215] ^ [ 33.804708] ffff88800c4cea80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 33.805308] ffff88800c4ceb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.810043] ================================================================== [ 33.810963] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.588553] BUG: Bad rss-counter state mm:00000000bbc3e5d0 type:MM_FILEPAGES val:33 [ 37.590825] BUG: Bad rss-counter state mm:00000000bbc3e5d0 type:MM_ANONPAGES val:22 [ 38.315518] BUG: Bad rss-counter state mm:000000008b52d5cf type:MM_FILEPAGES val:33 [ 38.316139] BUG: Bad rss-counter state mm:000000008b52d5cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55624' (ECDSA) to the list of known hosts. 2023/06/20 10:07:27 fuzzer started 2023/06/20 10:07:27 dialing manager at localhost:44161 2023/06/20 10:07:27 checking machine... 2023/06/20 10:07:27 checking revisions... [ 39.269912] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:07:28 testing simple program... [ 39.335070] cgroup: Unknown subsys name 'net' [ 39.405906] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:07:24 Registers: info registers vcpu 0 RAX=0000000080010004 RBX=ffff88800f4a8000 RCX=0000000000000000 RDX=000000000001c062 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800f4a8180 RSP=ffff88806ce09de8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=ffff88806ce09ff8 R12=000000000001c062 R13=ffff88800f4ac4c8 R14=0000000000000000 R15=ffff88800f4a8008 RIP=ffffffff821920cf RFL=00000046 [---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 00007faa0fdc4900 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=00007faa0fdc46f8 CR3=000000000c67e000 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=ff000000000000000000000000000000 XMM02=50454c45545f434c0053534552444441 XMM03=505f434c00534547415353454d5f434c XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=ffff88800f4a8000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff821920cb RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff888008dbf7d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000000 R12=00000000000101f7 R13=ffffed1001e95001 R14=ffffffff85a237a0 R15=dffffc0000000000 RIP=ffffffff821920cf RFL=00000093 [--S-A-C] 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 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=00007faa101f4790 CR3=000000000d7d6000 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=0000000000000018fffffffe7ffbfeff XMM01=3bfe586fbe37f6b00000565100000030 XMM02=3bfe586fbe37f6b0faaa78e3efb6bb74 XMM03=0000000000000002fbaa78e3efb6bb74 XMM04=00000000000000008000000000000006 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=ba80541efe382e730000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000