[ 31.122447] BUG: Bad rss-counter state mm:0000000089a2362a type:MM_FILEPAGES val:33 [ 31.123648] BUG: Bad rss-counter state mm:0000000089a2362a type:MM_ANONPAGES val:22 [ 31.163166] ================================================================== [ 31.164143] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.165416] Read of size 8 at addr ffff888016b21b38 by task sshd/220 [ 31.166238] [ 31.166473] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.167384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.168415] Call Trace: [ 31.168756] [ 31.169066] dump_stack_lvl+0x91/0xf0 [ 31.169586] print_report+0xcc/0x620 [ 31.170100] ? __virt_addr_valid+0x102/0x340 [ 31.170685] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171343] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.172004] kasan_report+0xbe/0xf0 [ 31.172509] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.173191] vma_interval_tree_remove+0xc75/0xec0 [ 31.173846] vma_prepare+0xc54/0x11a0 [ 31.174366] __split_vma+0x5af/0x950 [ 31.174885] ? __pfx___split_vma+0x10/0x10 [ 31.175461] ? find_held_lock+0x2c/0x110 [ 31.176028] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.176646] ? lock_is_held_type+0x9f/0x120 [ 31.177251] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.177924] ? mtree_range_walk+0x632/0x900 [ 31.178525] ? mas_walk+0x5c7/0x7c0 [ 31.179034] do_vmi_munmap+0x1f1/0x2b0 [ 31.179571] mmap_region+0x1f9/0x2660 [ 31.180089] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.180636] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.181414] ? __pfx_lock_acquire+0x10/0x10 [ 31.181995] ? __pfx_mmap_region+0x10/0x10 [ 31.182570] ? security_mmap_addr+0x7d/0xa0 [ 31.183148] ? get_unmapped_area+0x1f5/0x3f0 [ 31.183744] do_mmap+0x854/0xf00 [ 31.184219] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.184762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.185393] ksys_mmap_pgoff+0x3af/0x500 [ 31.185940] do_syscall_64+0x3f/0x90 [ 31.186463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.187168] RIP: 0033:0x7ffb5b295d82 [ 31.187668] 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 [ 31.189971] RSP: 002b:00007ffda0329a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.190939] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb5b295d82 [ 31.191858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb5a6cf000 [ 31.192762] RBP: 00007ffb5a6cf000 R08: 0000000000000009 R09: 0000000000001000 [ 31.193693] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5c1e1cec0 [ 31.194612] R13: 00007ffda0329a40 R14: 00007ffda0329a70 R15: 00007ffda0329dd0 [ 31.195543] [ 31.195861] [ 31.196093] Allocated by task 212: [ 31.196556] kasan_save_stack+0x22/0x50 [ 31.197109] kasan_set_track+0x25/0x30 [ 31.197642] __kasan_slab_alloc+0x59/0x70 [ 31.198207] kmem_cache_alloc+0x16b/0x370 [ 31.198771] vm_area_dup+0x20/0x160 [ 31.199268] __split_vma+0x170/0x950 [ 31.199776] split_vma+0xc6/0x110 [ 31.200256] mprotect_fixup+0x8d2/0xb30 [ 31.200801] do_mprotect_pkey+0x87e/0xd40 [ 31.201371] __x64_sys_mprotect+0x78/0xc0 [ 31.201928] do_syscall_64+0x3f/0x90 [ 31.202439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203126] [ 31.203357] Freed by task 212: [ 31.203779] kasan_save_stack+0x22/0x50 [ 31.204319] kasan_set_track+0x25/0x30 [ 31.204855] kasan_save_free_info+0x2b/0x50 [ 31.205446] __kasan_slab_free+0x10a/0x190 [ 31.206025] kmem_cache_free+0x10d/0x4d0 [ 31.206582] rcu_core+0x8c8/0x2860 [ 31.207066] __do_softirq+0x1b7/0x7d4 [ 31.207579] [ 31.207812] Last potentially related work creation: [ 31.208441] kasan_save_stack+0x22/0x50 [ 31.208985] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.210314] remove_vma+0x139/0x170 [ 31.210799] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.211396] do_vmi_munmap+0x1f1/0x2b0 [ 31.211912] __vm_munmap+0x138/0x3a0 [ 31.212420] __x64_sys_munmap+0x59/0x80 [ 31.212963] do_syscall_64+0x3f/0x90 [ 31.213500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214206] [ 31.214441] Second to last potentially related work creation: [ 31.215181] kasan_save_stack+0x22/0x50 [ 31.215720] __kasan_record_aux_stack+0x8e/0xa0 [ 31.216338] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.217046] remove_vma+0x139/0x170 [ 31.217550] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.218153] do_vmi_munmap+0x1f1/0x2b0 [ 31.218685] mmap_region+0x1f9/0x2660 [ 31.219196] do_mmap+0x854/0xf00 [ 31.219669] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.220194] ksys_mmap_pgoff+0x3af/0x500 [ 31.220733] do_syscall_64+0x3f/0x90 [ 31.221258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.221956] [ 31.222192] The buggy address belongs to the object at ffff888016b21ae0 [ 31.222192] which belongs to the cache vm_area_struct of size 168 [ 31.223781] The buggy address is located 88 bytes inside of [ 31.223781] freed 168-byte region [ffff888016b21ae0, ffff888016b21b88) [ 31.225318] [ 31.225550] The buggy address belongs to the physical page: [ 31.226265] page:0000000058978a4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b21 [ 31.227453] memcg:ffff88800d520901 [ 31.227921] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.228665] page_type: 0xffffffff() [ 31.229156] raw: 0100000000000200 ffff8880087a0c80 ffffea000063bdc0 0000000000000007 [ 31.230146] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d520901 [ 31.231123] page dumped because: kasan: bad access detected [ 31.231833] [ 31.232066] Memory state around the buggy address: [ 31.232695] ffff888016b21a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.233620] ffff888016b21a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.234538] >ffff888016b21b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.235438] ^ [ 31.236089] ffff888016b21b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.237022] ffff888016b21c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.237938] ================================================================== [ 31.239154] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.710440] BUG: Bad rss-counter state mm:000000007072e8cd type:MM_FILEPAGES val:33 [ 33.711293] BUG: Bad rss-counter state mm:000000007072e8cd type:MM_ANONPAGES val:22 [ 34.171455] BUG: Bad rss-counter state mm:000000004cf86887 type:MM_FILEPAGES val:33 [ 34.172622] BUG: Bad rss-counter state mm:000000004cf86887 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47944' (ECDSA) to the list of known hosts. 2023/06/20 21:54:20 fuzzer started 2023/06/20 21:54:20 dialing manager at localhost:36067 2023/06/20 21:54:20 checking machine... 2023/06/20 21:54:20 checking revisions... [ 34.889109] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:54:21 testing simple program... [ 34.953689] cgroup: Unknown subsys name 'net' [ 34.996699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:54:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88808caa21b0 RCX=ffffffff811430ee RDX=ffff88800e938000 RSI=ffff88808caa21b0 RDI=ffff88800caa21b0 RBP=ffff88800caa21b0 RSP=ffff88806ce09d78 R8 =0000000000000001 R9 =ffffed1001954438 R10=ffff88800caa21c3 R11=00000000000b6a61 R12=0000000000000000 R13=ffffea0000662e80 R14=ffffffff813782f8 R15=ffff88800d9fd300 RIP=ffffffff814c0378 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 00007f7bfdb9d900 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=00007fb11ad2fe10 CR3=000000001c656000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffc6153eb78 CR3=0000000005482000 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=00007fd0fc5495100000558e6d1b2790 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