[ 30.435378] BUG: Bad rss-counter state mm:00000000e7a0ecce type:MM_FILEPAGES val:33 [ 30.436591] BUG: Bad rss-counter state mm:00000000e7a0ecce type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.583527] ================================================================== [ 30.584475] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.585420] Read of size 8 at addr ffff88800eadfc20 by task sshd/219 [ 30.586207] [ 30.586421] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.587411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.588398] Call Trace: [ 30.588734] [ 30.589031] dump_stack_lvl+0x91/0xf0 [ 30.589532] print_report+0xcc/0x620 [ 30.590034] ? __virt_addr_valid+0x102/0x340 [ 30.590586] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.591228] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.591870] kasan_report+0xbe/0xf0 [ 30.592346] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.592986] vma_interval_tree_remove+0xc75/0xec0 [ 30.593587] vma_prepare+0xc54/0x11a0 [ 30.594086] __split_vma+0x5af/0x950 [ 30.594553] ? __pfx___split_vma+0x10/0x10 [ 30.595091] ? find_held_lock+0x2c/0x110 [ 30.595635] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.596240] ? lock_is_held_type+0x9f/0x120 [ 30.596796] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.597408] ? mtree_range_walk+0x632/0x900 [ 30.597972] ? mas_walk+0x5c7/0x7c0 [ 30.598447] do_vmi_munmap+0x1f1/0x2b0 [ 30.598952] mmap_region+0x1f9/0x2660 [ 30.599448] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.599995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.600753] ? __pfx_lock_acquire+0x10/0x10 [ 30.601311] ? __pfx_mmap_region+0x10/0x10 [ 30.601858] ? security_mmap_addr+0x7d/0xa0 [ 30.602399] ? get_unmapped_area+0x1f5/0x3f0 [ 30.602969] do_mmap+0x854/0xf00 [ 30.603452] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.603957] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.604499] ksys_mmap_pgoff+0x3af/0x500 [ 30.605025] do_syscall_64+0x3f/0x90 [ 30.605481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.606118] RIP: 0033:0x7f3f22251d82 [ 30.606553] 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 [ 30.608593] RSP: 002b:00007ffd4b2ef5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.609504] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f22251d82 [ 30.610414] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f2168b000 [ 30.611304] RBP: 00007f3f2168b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.612193] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600b487dec0 [ 30.613107] R13: 00007ffd4b2ef5e0 R14: 00007ffd4b2ef610 R15: 00007ffd4b2ef970 [ 30.613986] [ 30.614281] [ 30.614494] Allocated by task 212: [ 30.614934] kasan_save_stack+0x22/0x50 [ 30.615465] kasan_set_track+0x25/0x30 [ 30.615997] __kasan_slab_alloc+0x59/0x70 [ 30.616517] kmem_cache_alloc+0x16b/0x370 [ 30.617049] vm_area_dup+0x20/0x160 [ 30.617517] __split_vma+0x170/0x950 [ 30.618000] split_vma+0xc6/0x110 [ 30.618451] mprotect_fixup+0x8d2/0xb30 [ 30.618980] do_mprotect_pkey+0x87e/0xd40 [ 30.619532] __x64_sys_mprotect+0x78/0xc0 [ 30.620079] do_syscall_64+0x3f/0x90 [ 30.620559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.621226] [ 30.621443] Freed by task 212: [ 30.621856] kasan_save_stack+0x22/0x50 [ 30.622367] kasan_set_track+0x25/0x30 [ 30.622876] kasan_save_free_info+0x2b/0x50 [ 30.623435] __kasan_slab_free+0x10a/0x190 [ 30.623989] kmem_cache_free+0x10d/0x4d0 [ 30.624504] rcu_core+0x8c8/0x2860 [ 30.624968] __do_softirq+0x1b7/0x7d4 [ 30.625444] [ 30.625657] Last potentially related work creation: [ 30.626286] kasan_save_stack+0x22/0x50 [ 30.626816] __kasan_record_aux_stack+0x8e/0xa0 [ 30.627430] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.628114] remove_vma+0x139/0x170 [ 30.628599] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.629188] do_vmi_munmap+0x1f1/0x2b0 [ 30.629685] __vm_munmap+0x138/0x3a0 [ 30.630178] __x64_sys_munmap+0x59/0x80 [ 30.630682] do_syscall_64+0x3f/0x90 [ 30.631176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.631865] [ 30.632087] The buggy address belongs to the object at ffff88800eadfbc8 [ 30.632087] which belongs to the cache vm_area_struct of size 168 [ 30.633585] The buggy address is located 88 bytes inside of [ 30.633585] freed 168-byte region [ffff88800eadfbc8, ffff88800eadfc70) [ 30.635032] [ 30.635250] The buggy address belongs to the physical page: [ 30.635980] page:000000007c96725d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeadf [ 30.637099] memcg:ffff88800ee8c501 [ 30.637528] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.638243] page_type: 0xffffffff() [ 30.638825] raw: 0100000000000200 ffff8880087a0c80 ffffea00004fe680 dead000000000006 [ 30.640016] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee8c501 [ 30.641161] page dumped because: kasan: bad access detected [ 30.641854] [ 30.642096] Memory state around the buggy address: [ 30.642684] ffff88800eadfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.643601] ffff88800eadfb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.644542] >ffff88800eadfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.645420] ^ [ 30.645967] ffff88800eadfc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.646858] ffff88800eadfd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.647736] ================================================================== [ 30.648801] Disabling lock debugging due to kernel taint [ 32.593133] BUG: Bad rss-counter state mm:00000000442e84da type:MM_FILEPAGES val:33 [ 32.594204] BUG: Bad rss-counter state mm:00000000442e84da type:MM_ANONPAGES val:22 [ 33.130351] BUG: Bad rss-counter state mm:0000000049b7b086 type:MM_FILEPAGES val:33 [ 33.131421] BUG: Bad rss-counter state mm:0000000049b7b086 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41185' (ECDSA) to the list of known hosts. 2023/06/20 20:56:59 fuzzer started 2023/06/20 20:56:59 dialing manager at localhost:36067 2023/06/20 20:56:59 checking machine... 2023/06/20 20:56:59 checking revisions... [ 33.944282] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:56:59 testing simple program... [ 33.996564] cgroup: Unknown subsys name 'net' [ 34.036529] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:56:58 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff1100201bf11 RSP=ffff8880100df880 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000283 R13=ffffea0000648340 R14=ffffffff81c63c8c R15=0000000000000000 RIP=ffffffff812e009a 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 00007fdfedbaa700 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=00007f8cb17e5890 CR3=000000000f5ec000 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=2038353a36353a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a36353a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000004 RCX=ffffffff81f57c84 RDX=ffff888015d29b40 RSI=000000000000001f RDI=0000000000000003 RBP=ffffffff849c8d00 RSP=ffff88800efdfa60 R8 =0000000000000003 R9 =0000000000000019 R10=000000000000001f R11=0000000000000000 R12=000000000000001f R13=0000000000000003 R14=000000000000000e R15=dffffc0000000000 RIP=ffffffff814c04a0 RFL=00000206 [-----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 00007f95ea1dc900 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=00007ffcbed8d000 CR3=0000000016160000 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