[ 23.844667] BUG: Bad rss-counter state mm:000000004a5f4b22 type:MM_FILEPAGES val:33 [ 23.845880] BUG: Bad rss-counter state mm:000000004a5f4b22 type:MM_ANONPAGES val:22 [ 23.890676] ================================================================== [ 23.891617] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.892565] Read of size 8 at addr ffff88800f64d6b0 by task sshd/218 [ 23.893335] [ 23.893557] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.894433] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.895417] Call Trace: [ 23.895895] [ 23.896180] dump_stack_lvl+0x91/0xf0 [ 23.896688] print_report+0xcc/0x620 [ 23.897177] ? __virt_addr_valid+0x102/0x340 [ 23.897730] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.898372] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.898991] kasan_report+0xbe/0xf0 [ 23.899466] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.900106] vma_interval_tree_remove+0xc75/0xec0 [ 23.900727] vma_prepare+0xc54/0x11a0 [ 23.901213] __split_vma+0x5af/0x950 [ 23.901697] ? __pfx___split_vma+0x10/0x10 [ 23.902247] ? find_held_lock+0x2c/0x110 [ 23.902780] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.903357] ? lock_is_held_type+0x9f/0x120 [ 23.903915] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.904538] ? mtree_range_walk+0x632/0x900 [ 23.905103] ? mas_walk+0x5c7/0x7c0 [ 23.905585] do_vmi_munmap+0x1f1/0x2b0 [ 23.906094] mmap_region+0x1f9/0x2660 [ 23.906586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.907114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.907874] ? __pfx_lock_acquire+0x10/0x10 [ 23.908412] ? __pfx_mmap_region+0x10/0x10 [ 23.908957] ? security_mmap_addr+0x7d/0xa0 [ 23.909492] ? get_unmapped_area+0x1f5/0x3f0 [ 23.910064] do_mmap+0x854/0xf00 [ 23.910510] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.911005] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.911598] ksys_mmap_pgoff+0x3af/0x500 [ 23.912128] do_syscall_64+0x3f/0x90 [ 23.912620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.913291] RIP: 0033:0x7f9065f84d82 [ 23.913761] 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 [ 23.915958] RSP: 002b:00007ffc1f89e1c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.916880] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9065f84d82 [ 23.917750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90653be000 [ 23.918622] RBP: 00007f90653be000 R08: 0000000000000009 R09: 0000000000001000 [ 23.919500] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565514fa0ec0 [ 23.920390] R13: 00007ffc1f89e1e0 R14: 00007ffc1f89e210 R15: 00007ffc1f89e570 [ 23.921270] [ 23.921566] [ 23.921785] Allocated by task 211: [ 23.922219] kasan_save_stack+0x22/0x50 [ 23.922735] kasan_set_track+0x25/0x30 [ 23.923236] __kasan_slab_alloc+0x59/0x70 [ 23.923789] kmem_cache_alloc+0x16b/0x370 [ 23.924318] vm_area_dup+0x20/0x160 [ 23.924781] __split_vma+0x170/0x950 [ 23.925259] split_vma+0xc6/0x110 [ 23.925709] mprotect_fixup+0x8d2/0xb30 [ 23.926212] do_mprotect_pkey+0x87e/0xd40 [ 23.926738] __x64_sys_mprotect+0x78/0xc0 [ 23.927274] do_syscall_64+0x3f/0x90 [ 23.927762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.928439] [ 23.928661] Freed by task 211: [ 23.929066] kasan_save_stack+0x22/0x50 [ 23.929572] kasan_set_track+0x25/0x30 [ 23.930078] kasan_save_free_info+0x2b/0x50 [ 23.930621] __kasan_slab_free+0x10a/0x190 [ 23.931179] kmem_cache_free+0x10d/0x4d0 [ 23.931705] rcu_core+0x8c8/0x2860 [ 23.932160] __do_softirq+0x1b7/0x7d4 [ 23.932648] [ 23.932873] Last potentially related work creation: [ 23.933470] kasan_save_stack+0x22/0x50 [ 23.933985] __kasan_record_aux_stack+0x8e/0xa0 [ 23.934568] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.935227] remove_vma+0x139/0x170 [ 23.935707] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.936282] do_vmi_munmap+0x1f1/0x2b0 [ 23.936781] __vm_munmap+0x138/0x3a0 [ 23.937254] __x64_sys_munmap+0x59/0x80 [ 23.937757] do_syscall_64+0x3f/0x90 [ 23.938242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.938905] [ 23.939126] The buggy address belongs to the object at ffff88800f64d658 [ 23.939126] which belongs to the cache vm_area_struct of size 168 [ 23.940638] The buggy address is located 88 bytes inside of [ 23.940638] freed 168-byte region [ffff88800f64d658, ffff88800f64d700) [ 23.942131] [ 23.942353] The buggy address belongs to the physical page: [ 23.943034] page:000000005d277a71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf64d [ 23.944154] memcg:ffff888013f9f201 [ 23.944593] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.945259] page_type: 0xffffffff() [ 23.945714] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.946648] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f9f201 [ 23.947572] page dumped because: kasan: bad access detected [ 23.948266] [ 23.948483] Memory state around the buggy address: [ 23.949077] ffff88800f64d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.949947] ffff88800f64d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.950820] >ffff88800f64d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.951692] ^ [ 23.952294] ffff88800f64d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.953174] ffff88800f64d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.954052] ================================================================== [ 23.955062] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.167513] BUG: Bad rss-counter state mm:00000000e5681f22 type:MM_FILEPAGES val:33 [ 26.168536] BUG: Bad rss-counter state mm:00000000e5681f22 type:MM_ANONPAGES val:22 [ 26.656244] BUG: Bad rss-counter state mm:00000000b0bf49fe type:MM_FILEPAGES val:33 [ 26.657451] BUG: Bad rss-counter state mm:00000000b0bf49fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16034' (ECDSA) to the list of known hosts. 2023/06/20 11:04:52 fuzzer started 2023/06/20 11:04:53 dialing manager at localhost:36067 2023/06/20 11:04:53 checking machine... 2023/06/20 11:04:53 checking revisions... [ 27.392722] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:04:53 testing simple program... [ 27.445647] cgroup: Unknown subsys name 'net' [ 27.486064] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:04:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880145b1b40 RSI=0000000000000014 RDI=0000000000000000 RBP=ffff8880102efe60 RSP=ffff8880102efb48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000014 R13=0000000000000000 R14=0000000000000000 R15=ffff8880102efea4 RIP=ffffffff814c0430 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 00007f30b2e95900 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=00007f30b344c618 CR3=000000000f434000 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=563412feff00545000000000000080fe 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 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=0000000000000001 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=00007fb995dee4a0 CR3=0000000009ad0000 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=0ce5982c68e9579a9a40f24551d7caae XMM02=ec2efd57dc4c00df000000000011c4c0 XMM03=ef67d121a53e4b0e000000000011c590 XMM04=ad20095eb691c60e00000000000ae988 XMM05=751b9502027dc0b9000000000012fde8 XMM06=bdf2e299e47b49d5000000000012fc70 XMM07=e042d86d42eb936e00000000001209f0 XMM08=ef67d121a53e4b0e000000000011c590 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000