[ 28.752321] BUG: Bad rss-counter state mm:000000004496519c type:MM_FILEPAGES val:33 [ 28.753501] BUG: Bad rss-counter state mm:000000004496519c type:MM_ANONPAGES val:22 [ 28.904012] ================================================================== [ 28.904934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.905877] Read of size 8 at addr ffff888014574310 by task sshd/219 [ 28.906777] [ 28.906993] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.907854] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.908845] Call Trace: [ 28.909162] [ 28.909447] dump_stack_lvl+0x91/0xf0 [ 28.909936] print_report+0xcc/0x620 [ 28.910416] ? __virt_addr_valid+0x102/0x340 [ 28.910966] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.911603] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.912219] kasan_report+0xbe/0xf0 [ 28.912695] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.913312] vma_interval_tree_remove+0xc75/0xec0 [ 28.913913] vma_prepare+0xc54/0x11a0 [ 28.914392] __split_vma+0x5af/0x950 [ 28.914859] ? __pfx___split_vma+0x10/0x10 [ 28.915395] ? find_held_lock+0x2c/0x110 [ 28.915916] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.916523] ? lock_is_held_type+0x9f/0x120 [ 28.917082] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.917701] ? mtree_range_walk+0x632/0x900 [ 28.918264] ? mas_walk+0x5c7/0x7c0 [ 28.918751] do_vmi_munmap+0x1f1/0x2b0 [ 28.919249] mmap_region+0x1f9/0x2660 [ 28.919746] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.920257] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.920975] ? __pfx_lock_acquire+0x10/0x10 [ 28.921516] ? __pfx_mmap_region+0x10/0x10 [ 28.922039] ? security_mmap_addr+0x7d/0xa0 [ 28.922580] ? get_unmapped_area+0x1f5/0x3f0 [ 28.923159] do_mmap+0x854/0xf00 [ 28.923626] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.924130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.924701] ksys_mmap_pgoff+0x3af/0x500 [ 28.925223] do_syscall_64+0x3f/0x90 [ 28.925723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.926371] RIP: 0033:0x7fa2e2c8bd82 [ 28.926879] 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 [ 28.929127] RSP: 002b:00007ffd865446e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.930081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2e2c8bd82 [ 28.930930] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2e20c5000 [ 28.931818] RBP: 00007fa2e20c5000 R08: 0000000000000009 R09: 0000000000001000 [ 28.932704] R10: 0000000000000812 R11: 0000000000000206 R12: 000056317ab42d90 [ 28.933605] R13: 00007ffd86544700 R14: 00007ffd86544730 R15: 00007ffd86544a90 [ 28.934509] [ 28.934822] [ 28.935037] Allocated by task 211: [ 28.935480] kasan_save_stack+0x22/0x50 [ 28.935995] kasan_set_track+0x25/0x30 [ 28.936531] __kasan_slab_alloc+0x59/0x70 [ 28.937070] kmem_cache_alloc+0x16b/0x370 [ 28.937614] vm_area_dup+0x20/0x160 [ 28.938086] __split_vma+0x170/0x950 [ 28.938564] split_vma+0xc6/0x110 [ 28.939000] mprotect_fixup+0x8d2/0xb30 [ 28.939527] do_mprotect_pkey+0x87e/0xd40 [ 28.940052] __x64_sys_mprotect+0x78/0xc0 [ 28.940575] do_syscall_64+0x3f/0x90 [ 28.941053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.941692] [ 28.941908] Freed by task 211: [ 28.942304] kasan_save_stack+0x22/0x50 [ 28.942804] kasan_set_track+0x25/0x30 [ 28.943317] kasan_save_free_info+0x2b/0x50 [ 28.943850] __kasan_slab_free+0x10a/0x190 [ 28.944404] kmem_cache_free+0x10d/0x4d0 [ 28.944921] rcu_core+0x8c8/0x2860 [ 28.945384] __do_softirq+0x1b7/0x7d4 [ 28.945889] [ 28.946113] Last potentially related work creation: [ 28.946726] kasan_save_stack+0x22/0x50 [ 28.947256] __kasan_record_aux_stack+0x8e/0xa0 [ 28.947854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.948530] remove_vma+0x139/0x170 [ 28.948993] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.949577] do_vmi_munmap+0x1f1/0x2b0 [ 28.950091] __vm_munmap+0x138/0x3a0 [ 28.950571] __x64_sys_munmap+0x59/0x80 [ 28.951091] do_syscall_64+0x3f/0x90 [ 28.951595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.952262] [ 28.952486] The buggy address belongs to the object at ffff8880145742b8 [ 28.952486] which belongs to the cache vm_area_struct of size 168 [ 28.954002] The buggy address is located 88 bytes inside of [ 28.954002] freed 168-byte region [ffff8880145742b8, ffff888014574360) [ 28.955535] [ 28.955759] The buggy address belongs to the physical page: [ 28.956503] page:00000000809b974e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14574 [ 28.957654] memcg:ffff88800c53d001 [ 28.958090] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.958753] page_type: 0xffffffff() [ 28.959215] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 28.960146] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c53d001 [ 28.961082] page dumped because: kasan: bad access detected [ 28.961775] [ 28.961998] Memory state around the buggy address: [ 28.962604] ffff888014574200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 28.963516] ffff888014574280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.964387] >ffff888014574300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.965241] ^ [ 28.965719] ffff888014574380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.966598] ffff888014574400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.967503] ================================================================== [ 28.968567] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.708469] BUG: Bad rss-counter state mm:0000000042d38499 type:MM_FILEPAGES val:33 [ 30.709043] BUG: Bad rss-counter state mm:0000000042d38499 type:MM_ANONPAGES val:22 [ 31.146275] BUG: Bad rss-counter state mm:0000000060bd37e1 type:MM_FILEPAGES val:33 [ 31.147280] BUG: Bad rss-counter state mm:0000000060bd37e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45419' (ECDSA) to the list of known hosts. 2023/06/19 21:12:07 fuzzer started 2023/06/19 21:12:07 dialing manager at localhost:44161 2023/06/19 21:12:07 checking machine... 2023/06/19 21:12:07 checking revisions... [ 31.897539] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:12:08 testing simple program... [ 31.951600] cgroup: Unknown subsys name 'net' [ 31.993684] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:12:02 Registers: info registers vcpu 0 RAX=000055c54a4e6e30 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014797d01 RSI=ffff888014797d80 RDI=ffff888014797d80 RBP=ffff8880147979e0 RSP=ffff888014797910 R8 =0000000000000001 R9 =ffff8880147979c8 R10=0000000000038001 R11=0000000000023535 R12=ffff8880147979e8 R13=ffff8880147979d0 R14=ffff888014797d80 R15=ffff888014797988 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f2a766c6900 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=00007f4e40a19650 CR3=000000000d7fc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9adc3e9f939bc3c700000000000ae988 XMM05=a46d87f6143347350000000000134aa8 XMM06=c6d2fef6dfcf42b700000000001334d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20202000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016ead1c0 RSI=ffffffff83c632c0 RDI=ffffffff87f94830 RBP=0000000000000000 RSP=ffff8880195576a0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000004e R11=00000a7400000a74 R12=0000000000000000 R13=000000000000004e R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c081b 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 00007f4e40464900 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=00007f4e40a1b618 CR3=00000000144d0000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000