[ 23.842156] BUG: Bad rss-counter state mm:0000000003083b05 type:MM_FILEPAGES val:33 [ 23.842668] BUG: Bad rss-counter state mm:0000000003083b05 type:MM_ANONPAGES val:22 [ 23.949496] ================================================================== [ 23.950180] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.950900] Read of size 8 at addr ffff888014628880 by task sshd/218 [ 23.951489] [ 23.951658] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.952323] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.953076] Call Trace: [ 23.953501] [ 23.953721] dump_stack_lvl+0x91/0xf0 [ 23.954099] print_report+0xcc/0x620 [ 23.954469] ? __virt_addr_valid+0x102/0x340 [ 23.954895] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.955372] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.955866] kasan_report+0xbe/0xf0 [ 23.956230] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.956761] vma_interval_tree_remove+0xc75/0xec0 [ 23.957136] vma_prepare+0xc54/0x11a0 [ 23.957402] __split_vma+0x5af/0x950 [ 23.957672] ? __pfx___split_vma+0x10/0x10 [ 23.957969] ? find_held_lock+0x2c/0x110 [ 23.958268] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.958582] ? lock_is_held_type+0x9f/0x120 [ 23.958883] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.959222] ? mtree_range_walk+0x632/0x900 [ 23.959535] ? mas_walk+0x5c7/0x7c0 [ 23.959820] do_vmi_munmap+0x1f1/0x2b0 [ 23.960109] mmap_region+0x1f9/0x2660 [ 23.960390] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.960688] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.961100] ? __pfx_lock_acquire+0x10/0x10 [ 23.961411] ? __pfx_mmap_region+0x10/0x10 [ 23.961720] ? security_mmap_addr+0x7d/0xa0 [ 23.962034] ? get_unmapped_area+0x1f5/0x3f0 [ 23.962360] do_mmap+0x854/0xf00 [ 23.962613] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.962901] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.963230] ksys_mmap_pgoff+0x3af/0x500 [ 23.963526] do_syscall_64+0x3f/0x90 [ 23.963819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.964200] RIP: 0033:0x7f92a099ad82 [ 23.964469] 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 [ 23.965724] RSP: 002b:00007ffefe27ed28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.966251] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92a099ad82 [ 23.966749] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f929fdd4000 [ 23.967259] RBP: 00007f929fdd4000 R08: 0000000000000009 R09: 0000000000001000 [ 23.967771] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef9c0acf70 [ 23.968269] R13: 00007ffefe27ed40 R14: 00007ffefe27ed70 R15: 00007ffefe27f0d0 [ 23.968774] [ 23.968944] [ 23.969069] Allocated by task 211: [ 23.969317] kasan_save_stack+0x22/0x50 [ 23.969620] kasan_set_track+0x25/0x30 [ 23.969907] __kasan_slab_alloc+0x59/0x70 [ 23.970220] kmem_cache_alloc+0x16b/0x370 [ 23.970525] vm_area_dup+0x20/0x160 [ 23.970799] __split_vma+0x170/0x950 [ 23.971079] split_vma+0xc6/0x110 [ 23.971335] mprotect_fixup+0x8d2/0xb30 [ 23.971629] do_mprotect_pkey+0x87e/0xd40 [ 23.971940] __x64_sys_mprotect+0x78/0xc0 [ 23.972245] do_syscall_64+0x3f/0x90 [ 23.972525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.972902] [ 23.973029] Freed by task 209: [ 23.973258] kasan_save_stack+0x22/0x50 [ 23.973559] kasan_set_track+0x25/0x30 [ 23.973850] kasan_save_free_info+0x2b/0x50 [ 23.974164] __kasan_slab_free+0x10a/0x190 [ 23.974483] kmem_cache_free+0x10d/0x4d0 [ 23.974774] rcu_core+0x8c8/0x2860 [ 23.975046] __do_softirq+0x1b7/0x7d4 [ 23.975327] [ 23.975452] Last potentially related work creation: [ 23.975805] kasan_save_stack+0x22/0x50 [ 23.976106] __kasan_record_aux_stack+0x8e/0xa0 [ 23.976446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.976825] remove_vma+0x139/0x170 [ 23.977094] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.977424] do_vmi_munmap+0x1f1/0x2b0 [ 23.977711] __vm_munmap+0x138/0x3a0 [ 23.977985] __x64_sys_munmap+0x59/0x80 [ 23.978276] do_syscall_64+0x3f/0x90 [ 23.978559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.978936] [ 23.979062] The buggy address belongs to the object at ffff888014628828 [ 23.979062] which belongs to the cache vm_area_struct of size 168 [ 23.979955] The buggy address is located 88 bytes inside of [ 23.979955] freed 168-byte region [ffff888014628828, ffff8880146288d0) [ 23.980794] [ 23.980924] The buggy address belongs to the physical page: [ 23.981319] page:00000000a16aebbc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14628 [ 23.981967] memcg:ffff88800d93f201 [ 23.982220] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.982606] page_type: 0xffffffff() [ 23.982874] raw: 0100000000000200 ffff8880087a0c80 ffffea00003733c0 dead000000000006 [ 23.983420] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d93f201 [ 23.983972] page dumped because: kasan: bad access detected [ 23.984370] [ 23.984493] Memory state around the buggy address: [ 23.984843] ffff888014628780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.985353] ffff888014628800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.985870] >ffff888014628880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 23.986374] ^ [ 23.986617] ffff888014628900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.987126] ffff888014628980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 23.987635] ================================================================== [ 23.988182] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.806188] BUG: Bad rss-counter state mm:00000000175f1dfe type:MM_FILEPAGES val:33 [ 25.807566] BUG: Bad rss-counter state mm:00000000175f1dfe type:MM_ANONPAGES val:22 [ 26.292031] BUG: Bad rss-counter state mm:0000000009bb9f16 type:MM_FILEPAGES val:33 [ 26.293095] BUG: Bad rss-counter state mm:0000000009bb9f16 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49524' (ECDSA) to the list of known hosts. 2023/06/20 20:15:47 fuzzer started 2023/06/20 20:15:48 dialing manager at localhost:36067 2023/06/20 20:15:48 checking machine... 2023/06/20 20:15:48 checking revisions... [ 27.032111] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:15:48 testing simple program... [ 27.093474] cgroup: Unknown subsys name 'net' [ 27.141659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:15:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81b3c3c3 RDX=ffff88800fb33680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801661ac00 RSP=ffff8880146ff790 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800b583938 R14=ffff88801664e5c0 R15=ffff8880146ff8c0 RIP=ffffffff814c0860 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007facf50c1900 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=00007facf45329a0 CR3=000000000cc1e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=94cda98684e5e0c600000000000ae988 XMM05=b8ecec5089fa8ddd0000000000131bf0 XMM06=bdf2e299e47b49d50000000000130670 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff88800fdcf1f8 RDX=1ffff11001fb9e36 RSI=ffffffff813ad720 RDI=ffff88800fdcf220 RBP=ffff88800fdcf1f0 RSP=ffff88800fdcf150 R8 =0000000000000001 R9 =ffff88800fdcf198 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800fdcf220 R13=0000000000000000 R14=ffff88800dbb3680 R15=0000000000092cc0 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007f5758241900 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=00007ffe62612000 CR3=000000000ee10000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000