[ 31.129080] BUG: Bad rss-counter state mm:00000000ff495199 type:MM_FILEPAGES val:33 [ 31.130044] BUG: Bad rss-counter state mm:00000000ff495199 type:MM_ANONPAGES val:22 [ 31.284975] ================================================================== [ 31.285867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.286753] Read of size 8 at addr ffff88800e0b6228 by task sshd/219 [ 31.287468] [ 31.287677] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.288658] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.289568] Call Trace: [ 31.289896] [ 31.290167] dump_stack_lvl+0x91/0xf0 [ 31.290650] print_report+0xcc/0x620 [ 31.291110] ? __virt_addr_valid+0x102/0x340 [ 31.291634] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.292217] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.292797] kasan_report+0xbe/0xf0 [ 31.293252] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293846] vma_interval_tree_remove+0xc75/0xec0 [ 31.294418] vma_prepare+0xc54/0x11a0 [ 31.294887] __split_vma+0x5af/0x950 [ 31.295354] ? __pfx___split_vma+0x10/0x10 [ 31.295882] ? find_held_lock+0x2c/0x110 [ 31.296397] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.296954] ? lock_is_held_type+0x9f/0x120 [ 31.297496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.298106] ? mtree_range_walk+0x632/0x900 [ 31.298664] ? mas_walk+0x5c7/0x7c0 [ 31.299145] do_vmi_munmap+0x1f1/0x2b0 [ 31.299639] mmap_region+0x1f9/0x2660 [ 31.300114] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.300633] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.301336] ? __pfx_lock_acquire+0x10/0x10 [ 31.301882] ? __pfx_mmap_region+0x10/0x10 [ 31.302421] ? security_mmap_addr+0x7d/0xa0 [ 31.302943] ? get_unmapped_area+0x1f5/0x3f0 [ 31.303489] do_mmap+0x854/0xf00 [ 31.303921] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.304420] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.304975] ksys_mmap_pgoff+0x3af/0x500 [ 31.305488] do_syscall_64+0x3f/0x90 [ 31.305969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306620] RIP: 0033:0x7f2010099d82 [ 31.307077] 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 [ 31.309204] RSP: 002b:00007ffe9105ad48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.310103] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2010099d82 [ 31.310954] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f200f4d3000 [ 31.311800] RBP: 00007f200f4d3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.312644] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c45935eec0 [ 31.313492] R13: 00007ffe9105ad60 R14: 00007ffe9105ad90 R15: 00007ffe9105b0f0 [ 31.314380] [ 31.314673] [ 31.314887] Allocated by task 211: [ 31.315309] kasan_save_stack+0x22/0x50 [ 31.315808] kasan_set_track+0x25/0x30 [ 31.316300] __kasan_slab_alloc+0x59/0x70 [ 31.316834] kmem_cache_alloc+0x16b/0x370 [ 31.317355] vm_area_dup+0x20/0x160 [ 31.317823] __split_vma+0x170/0x950 [ 31.318292] split_vma+0xc6/0x110 [ 31.318732] mprotect_fixup+0x8d2/0xb30 [ 31.319230] do_mprotect_pkey+0x87e/0xd40 [ 31.319727] __x64_sys_mprotect+0x78/0xc0 [ 31.320222] do_syscall_64+0x3f/0x90 [ 31.320780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.321603] [ 31.321862] Freed by task 19: [ 31.322232] kasan_save_stack+0x22/0x50 [ 31.322713] kasan_set_track+0x25/0x30 [ 31.323180] kasan_save_free_info+0x2b/0x50 [ 31.323683] __kasan_slab_free+0x10a/0x190 [ 31.324187] kmem_cache_free+0x10d/0x4d0 [ 31.324672] rcu_core+0x8c8/0x2860 [ 31.325092] __do_softirq+0x1b7/0x7d4 [ 31.325544] [ 31.325766] Last potentially related work creation: [ 31.326314] kasan_save_stack+0x22/0x50 [ 31.326787] __kasan_record_aux_stack+0x8e/0xa0 [ 31.327336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.327946] remove_vma+0x139/0x170 [ 31.328373] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.328920] do_vmi_munmap+0x1f1/0x2b0 [ 31.329402] __vm_munmap+0x138/0x3a0 [ 31.329974] __x64_sys_munmap+0x59/0x80 [ 31.330472] do_syscall_64+0x3f/0x90 [ 31.330943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.331590] [ 31.331805] Second to last potentially related work creation: [ 31.332489] kasan_save_stack+0x22/0x50 [ 31.332999] __kasan_record_aux_stack+0x8e/0xa0 [ 31.333579] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.334232] remove_vma+0x139/0x170 [ 31.334685] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.335241] do_vmi_munmap+0x1f1/0x2b0 [ 31.335726] mmap_region+0x1f9/0x2660 [ 31.336207] do_mmap+0x854/0xf00 [ 31.336644] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.337128] ksys_mmap_pgoff+0x3af/0x500 [ 31.337644] do_syscall_64+0x3f/0x90 [ 31.338121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.338769] [ 31.338984] The buggy address belongs to the object at ffff88800e0b61d0 [ 31.338984] which belongs to the cache vm_area_struct of size 168 [ 31.340477] The buggy address is located 88 bytes inside of [ 31.340477] freed 168-byte region [ffff88800e0b61d0, ffff88800e0b6278) [ 31.341906] [ 31.342124] The buggy address belongs to the physical page: [ 31.342787] page:000000004ba66a8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0b6 [ 31.343871] memcg:ffff88800e098401 [ 31.344290] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.344989] page_type: 0xffffffff() [ 31.345438] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.346363] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e098401 [ 31.347263] page dumped because: kasan: bad access detected [ 31.347934] [ 31.348143] Memory state around the buggy address: [ 31.348726] ffff88800e0b6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.349600] ffff88800e0b6180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.350476] >ffff88800e0b6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.351345] ^ [ 31.351909] ffff88800e0b6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.352775] ffff88800e0b6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.353638] ================================================================== [ 31.354732] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.927864] BUG: Bad rss-counter state mm:00000000bb1e2cbe type:MM_FILEPAGES val:33 [ 33.929375] BUG: Bad rss-counter state mm:00000000bb1e2cbe type:MM_ANONPAGES val:22 [ 34.419277] BUG: Bad rss-counter state mm:0000000036eb1011 type:MM_FILEPAGES val:33 [ 34.421323] BUG: Bad rss-counter state mm:0000000036eb1011 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48181' (ECDSA) to the list of known hosts. 2023/06/20 17:34:08 fuzzer started 2023/06/20 17:34:08 dialing manager at localhost:36067 2023/06/20 17:34:08 checking machine... 2023/06/20 17:34:08 checking revisions... [ 35.144561] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:34:09 testing simple program... [ 35.196185] cgroup: Unknown subsys name 'net' [ 35.297007] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:34:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000056284d1239b0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000004 RDI=000056284d121350 RBP=000056284d121350 RSP=00007ffdddbfa048 R8 =0000000000000000 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000000 R12=0000000000000200 R13=000056284d121350 R14=0000000000000004 R15=0000000000000000 RIP=00007f541c9280f0 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f541c468900 00000000 00000000 GS =0000 0000000000000000 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=00007ffdddbf4000 CR3=000000000fd4e000 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=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=00007f541ca1f618 CR3=000000000fd4e000 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