[ 25.791145] BUG: Bad rss-counter state mm:00000000b0d63e2d type:MM_FILEPAGES val:33 [ 25.792388] BUG: Bad rss-counter state mm:00000000b0d63e2d type:MM_ANONPAGES val:22 [ 25.951810] ================================================================== [ 25.952745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.953683] Read of size 8 at addr ffff88800db7d880 by task sshd/221 [ 25.954443] [ 25.954657] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 25.955618] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.956612] Call Trace: [ 25.956956] [ 25.957255] dump_stack_lvl+0x91/0xf0 [ 25.957765] print_report+0xcc/0x620 [ 25.958258] ? __virt_addr_valid+0x102/0x340 [ 25.958816] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.959459] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.960091] kasan_report+0xbe/0xf0 [ 25.960586] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.961211] vma_interval_tree_remove+0xc75/0xec0 [ 25.961813] vma_prepare+0xc54/0x11a0 [ 25.962300] __split_vma+0x5af/0x950 [ 25.962774] ? __pfx___split_vma+0x10/0x10 [ 25.963314] ? find_held_lock+0x2c/0x110 [ 25.963845] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.964426] ? lock_is_held_type+0x9f/0x120 [ 25.964982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.965590] ? mtree_range_walk+0x632/0x900 [ 25.966151] ? mas_walk+0x5c7/0x7c0 [ 25.966635] do_vmi_munmap+0x1f1/0x2b0 [ 25.967136] mmap_region+0x1f9/0x2660 [ 25.967619] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.968161] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.968893] ? __pfx_lock_acquire+0x10/0x10 [ 25.969439] ? __pfx_mmap_region+0x10/0x10 [ 25.969971] ? security_mmap_addr+0x7d/0xa0 [ 25.970509] ? get_unmapped_area+0x1f5/0x3f0 [ 25.971070] do_mmap+0x854/0xf00 [ 25.971513] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.972028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.972594] ksys_mmap_pgoff+0x3af/0x500 [ 25.973102] do_syscall_64+0x3f/0x90 [ 25.973592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.974254] RIP: 0033:0x7f10fc04dd82 [ 25.974718] 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 [ 25.976899] RSP: 002b:00007ffd8979e658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.977822] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10fc04dd82 [ 25.978684] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10fb487000 [ 25.979545] RBP: 00007f10fb487000 R08: 0000000000000009 R09: 0000000000001000 [ 25.980418] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621207a3f70 [ 25.981287] R13: 00007ffd8979e670 R14: 00007ffd8979e6a0 R15: 00007ffd8979ea00 [ 25.982154] [ 25.982450] [ 25.982668] Allocated by task 214: [ 25.983098] kasan_save_stack+0x22/0x50 [ 25.983604] kasan_set_track+0x25/0x30 [ 25.984118] __kasan_slab_alloc+0x59/0x70 [ 25.984649] kmem_cache_alloc+0x16b/0x370 [ 25.985172] vm_area_dup+0x20/0x160 [ 25.985631] __split_vma+0x170/0x950 [ 25.986102] split_vma+0xc6/0x110 [ 25.986542] mprotect_fixup+0x8d2/0xb30 [ 25.987046] do_mprotect_pkey+0x87e/0xd40 [ 25.987568] __x64_sys_mprotect+0x78/0xc0 [ 25.988109] do_syscall_64+0x3f/0x90 [ 25.988589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.989240] [ 25.989459] Freed by task 214: [ 25.989856] kasan_save_stack+0x22/0x50 [ 25.990379] kasan_set_track+0x25/0x30 [ 25.990891] kasan_save_free_info+0x2b/0x50 [ 25.991422] __kasan_slab_free+0x10a/0x190 [ 25.991998] kmem_cache_free+0x10d/0x4d0 [ 25.992506] rcu_core+0x8c8/0x2860 [ 25.992957] __do_softirq+0x1b7/0x7d4 [ 25.993439] [ 25.993658] Last potentially related work creation: [ 25.994252] kasan_save_stack+0x22/0x50 [ 25.994758] __kasan_record_aux_stack+0x8e/0xa0 [ 25.995341] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.996005] remove_vma+0x139/0x170 [ 25.996464] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.997030] do_vmi_munmap+0x1f1/0x2b0 [ 25.997521] __vm_munmap+0x138/0x3a0 [ 25.997993] __x64_sys_munmap+0x59/0x80 [ 25.998497] do_syscall_64+0x3f/0x90 [ 25.998980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.999632] [ 25.999858] The buggy address belongs to the object at ffff88800db7d828 [ 25.999858] which belongs to the cache vm_area_struct of size 168 [ 26.001327] The buggy address is located 88 bytes inside of [ 26.001327] freed 168-byte region [ffff88800db7d828, ffff88800db7d8d0) [ 26.002780] [ 26.002997] The buggy address belongs to the physical page: [ 26.003671] page:0000000005872e6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb7d [ 26.004799] memcg:ffff888009889501 [ 26.005237] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.005959] page_type: 0xffffffff() [ 26.006423] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aef40 dead000000000003 [ 26.007368] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009889501 [ 26.008306] page dumped because: kasan: bad access detected [ 26.008973] [ 26.009193] Memory state around the buggy address: [ 26.009789] ffff88800db7d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.010656] ffff88800db7d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 26.011520] >ffff88800db7d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 26.012390] ^ [ 26.012811] ffff88800db7d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.013686] ffff88800db7d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 26.014551] ================================================================== [ 26.015547] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.911299] BUG: Bad rss-counter state mm:000000004a56126d type:MM_FILEPAGES val:33 [ 27.913086] BUG: Bad rss-counter state mm:000000004a56126d type:MM_ANONPAGES val:22 [ 28.791334] BUG: Bad rss-counter state mm:00000000ee2745b2 type:MM_FILEPAGES val:33 [ 28.792589] BUG: Bad rss-counter state mm:00000000ee2745b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50029' (ECDSA) to the list of known hosts. 2023/06/21 09:55:56 fuzzer started 2023/06/21 09:55:57 dialing manager at localhost:36067 2023/06/21 09:55:57 checking machine... 2023/06/21 09:55:57 checking revisions... 2023/06/21 09:55:57 testing simple program... [ 29.832859] kmemleak: Automatic memory scanning thread ended [ 29.883591] cgroup: Unknown subsys name 'net' [ 29.960617] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:55:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fc3f5e8 RCX=0000000000000001 RDX=1ffff11001f87ec8 RSI=ffff88800fc3ff10 RDI=ffff88800fc3f5e8 RBP=ffff88800fc3f640 RSP=ffff88800fc3f5d0 R8 =0000000000000001 R9 =ffff88800fc3f628 R10=0000000000038001 R11=0000000000022457 R12=ffff88800fc3f6b0 R13=0000000000000000 R14=ffff888016ea51c0 R15=0000000000092cc0 RIP=ffffffff8113038e 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f35634d6900 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=00007ffc25416000 CR3=000000001bd06000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002650413 RBX=ffff888013282068 RCX=1ffff110025f2a60 RDX=dffffc0000000000 RSI=ffff888019f00120 RDI=ffff888013282098 RBP=ffff888012f952d0 RSP=ffff888016c6f6c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888019f00100 R13=0000000000000000 R14=ffff88801a35ac28 R15=ffff88801a35abe0 RIP=ffffffff8184767e 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 00007f6a0329c900 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=00007f6a026f9088 CR3=000000000d83a000 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=a8c989ea18ec8691a84afdedf9ed0c21 XMM02=ec2efd57dc4c00df000000000011d000 XMM03=f670c9039d0fdd3f000000000011d0d0 XMM04=034ada6bcd2da2bf00000000000ae988 XMM05=a05c17b52a58f2fd0000000000131fb8 XMM06=59d5b690e0af863b0000000000130810 XMM07=fb795ef6d65770560000000000120cb0 XMM08=2c67c8bc2e329bc3000000000011d070 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000