[ 32.959641] BUG: Bad rss-counter state mm:000000006c7cd93d type:MM_FILEPAGES val:33 [ 32.960738] BUG: Bad rss-counter state mm:000000006c7cd93d type:MM_ANONPAGES val:22 [ 33.132099] ================================================================== [ 33.133064] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.133999] Read of size 8 at addr ffff88801bc376b0 by task sshd/218 [ 33.134885] [ 33.135109] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.135971] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.136965] Call Trace: [ 33.137285] [ 33.137566] dump_stack_lvl+0x91/0xf0 [ 33.138055] print_report+0xcc/0x620 [ 33.138532] ? __virt_addr_valid+0x102/0x340 [ 33.139087] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.139716] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.140330] kasan_report+0xbe/0xf0 [ 33.140801] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.141414] vma_interval_tree_remove+0xc75/0xec0 [ 33.142011] vma_prepare+0xc54/0x11a0 [ 33.142486] __split_vma+0x5af/0x950 [ 33.142956] ? __pfx___split_vma+0x10/0x10 [ 33.143502] ? find_held_lock+0x2c/0x110 [ 33.144027] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.144595] ? lock_is_held_type+0x9f/0x120 [ 33.145128] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.145728] ? mtree_range_walk+0x632/0x900 [ 33.146278] ? mas_walk+0x5c7/0x7c0 [ 33.146754] do_vmi_munmap+0x1f1/0x2b0 [ 33.147264] mmap_region+0x1f9/0x2660 [ 33.147745] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.148256] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.148972] ? __pfx_lock_acquire+0x10/0x10 [ 33.149502] ? __pfx_mmap_region+0x10/0x10 [ 33.150037] ? security_mmap_addr+0x7d/0xa0 [ 33.150572] ? get_unmapped_area+0x1f5/0x3f0 [ 33.151131] do_mmap+0x854/0xf00 [ 33.151590] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.152082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.152646] ksys_mmap_pgoff+0x3af/0x500 [ 33.153153] do_syscall_64+0x3f/0x90 [ 33.153634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.154281] RIP: 0033:0x7fe18f32bd82 [ 33.154736] 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 [ 33.156840] RSP: 002b:00007ffff9b38ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.157736] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe18f32bd82 [ 33.158587] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe18e765000 [ 33.159440] RBP: 00007fe18e765000 R08: 0000000000000009 R09: 0000000000001000 [ 33.160291] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb86c4fec0 [ 33.161130] R13: 00007ffff9b38ec0 R14: 00007ffff9b38ef0 R15: 00007ffff9b39250 [ 33.161982] [ 33.162273] [ 33.162487] Allocated by task 210: [ 33.162913] kasan_save_stack+0x22/0x50 [ 33.163453] kasan_set_track+0x25/0x30 [ 33.163953] __kasan_slab_alloc+0x59/0x70 [ 33.164478] kmem_cache_alloc+0x16b/0x370 [ 33.164988] vm_area_dup+0x20/0x160 [ 33.165444] __split_vma+0x170/0x950 [ 33.165909] split_vma+0xc6/0x110 [ 33.166348] mprotect_fixup+0x8d2/0xb30 [ 33.166849] do_mprotect_pkey+0x87e/0xd40 [ 33.167381] __x64_sys_mprotect+0x78/0xc0 [ 33.167897] do_syscall_64+0x3f/0x90 [ 33.168371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.169005] [ 33.169224] Freed by task 202: [ 33.169611] kasan_save_stack+0x22/0x50 [ 33.170114] kasan_set_track+0x25/0x30 [ 33.170605] kasan_save_free_info+0x2b/0x50 [ 33.171137] __kasan_slab_free+0x10a/0x190 [ 33.171692] kmem_cache_free+0x10d/0x4d0 [ 33.172200] rcu_core+0x8c8/0x2860 [ 33.172648] __do_softirq+0x1b7/0x7d4 [ 33.173127] [ 33.173350] Last potentially related work creation: [ 33.173928] kasan_save_stack+0x22/0x50 [ 33.174440] __kasan_record_aux_stack+0x8e/0xa0 [ 33.175027] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.175685] remove_vma+0x139/0x170 [ 33.176137] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.176696] do_vmi_munmap+0x1f1/0x2b0 [ 33.177177] __vm_munmap+0x138/0x3a0 [ 33.177644] __x64_sys_munmap+0x59/0x80 [ 33.178143] do_syscall_64+0x3f/0x90 [ 33.178620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.179278] [ 33.179497] The buggy address belongs to the object at ffff88801bc37658 [ 33.179497] which belongs to the cache vm_area_struct of size 168 [ 33.180965] The buggy address is located 88 bytes inside of [ 33.180965] freed 168-byte region [ffff88801bc37658, ffff88801bc37700) [ 33.182375] [ 33.182594] The buggy address belongs to the physical page: [ 33.183269] page:00000000138c434b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc37 [ 33.184364] memcg:ffff888019b7cf01 [ 33.184789] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.185442] page_type: 0xffffffff() [ 33.185888] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.186809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b7cf01 [ 33.187723] page dumped because: kasan: bad access detected [ 33.188384] [ 33.188603] Memory state around the buggy address: [ 33.189182] ffff88801bc37580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.190037] ffff88801bc37600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.190893] >ffff88801bc37680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.191762] ^ [ 33.192347] ffff88801bc37700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.193201] ffff88801bc37780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.194048] ================================================================== [ 33.195011] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.234892] BUG: Bad rss-counter state mm:00000000d38356cd type:MM_FILEPAGES val:33 [ 35.236144] BUG: Bad rss-counter state mm:00000000d38356cd type:MM_ANONPAGES val:22 [ 35.685246] BUG: Bad rss-counter state mm:00000000aa0034a3 type:MM_FILEPAGES val:33 [ 35.686448] BUG: Bad rss-counter state mm:00000000aa0034a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57694' (ECDSA) to the list of known hosts. 2023/06/20 01:45:02 fuzzer started 2023/06/20 01:45:02 dialing manager at localhost:44161 2023/06/20 01:45:02 checking machine... 2023/06/20 01:45:02 checking revisions... [ 36.420699] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:45:02 testing simple program... [ 36.471319] cgroup: Unknown subsys name 'net' [ 36.539558] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:45:01 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88800ef17dd8 RSI=ffff88800ef17da0 RDI=ffff88800ef17810 RBP=ffff88800ef17898 RSP=ffff88800ef17800 R8 =0000000000000001 R9 =ffff88800ef17840 R10=0000000000038001 R11=00000000000238fc R12=ffff88800ef178c8 R13=0000000000000000 R14=ffff8880168851c0 R15=ffff88800e9b9d10 RIP=ffffffff810bd05d 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 00007f57a6a2f900 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=00007f57a6fe70b0 CR3=000000000e778000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f1e9a75adc0 CR3=000000000c592000 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=8068765c5f4e79b6024136c9934dbca6 XMM02=000000000011cfd8ec2efd57dc4c00df XMM03=0000000000123910c97140c516f77741 XMM04=077a5c1b759effb100000000000ae988 XMM05=7a810ee749949aae0000000000134360 XMM06=bdf2e299e47b49d50000000000133090 XMM07=e042d86d42eb936e0000000000123b90 XMM08=c97140c516f77741000000000011d038 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000