syzkaller login: [ 29.209161] BUG: Bad rss-counter state mm:0000000095093325 type:MM_FILEPAGES val:33 [ 29.210379] BUG: Bad rss-counter state mm:0000000095093325 type:MM_ANONPAGES val:22 [ 29.254480] ================================================================== [ 29.255391] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.256391] Read of size 8 at addr ffff88800e080880 by task sshd/219 [ 29.257179] [ 29.257402] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.258271] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.259253] Call Trace: [ 29.259579] [ 29.259873] dump_stack_lvl+0x91/0xf0 [ 29.260386] print_report+0xcc/0x620 [ 29.260876] ? __virt_addr_valid+0x102/0x340 [ 29.261435] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.262071] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.262704] kasan_report+0xbe/0xf0 [ 29.263190] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.263855] vma_interval_tree_remove+0xc75/0xec0 [ 29.264514] vma_prepare+0xc54/0x11a0 [ 29.265006] __split_vma+0x5af/0x950 [ 29.265484] ? __pfx___split_vma+0x10/0x10 [ 29.266026] ? find_held_lock+0x2c/0x110 [ 29.266555] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.267123] ? lock_is_held_type+0x9f/0x120 [ 29.267672] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.268307] ? mtree_range_walk+0x632/0x900 [ 29.268865] ? mas_walk+0x5c7/0x7c0 [ 29.269346] do_vmi_munmap+0x1f1/0x2b0 [ 29.269850] mmap_region+0x1f9/0x2660 [ 29.270340] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.270869] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.271592] ? __pfx_lock_acquire+0x10/0x10 [ 29.272165] ? __pfx_mmap_region+0x10/0x10 [ 29.272708] ? security_mmap_addr+0x7d/0xa0 [ 29.273253] ? get_unmapped_area+0x1f5/0x3f0 [ 29.273813] do_mmap+0x854/0xf00 [ 29.274264] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.274773] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.275353] ksys_mmap_pgoff+0x3af/0x500 [ 29.275866] do_syscall_64+0x3f/0x90 [ 29.276374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.277039] RIP: 0033:0x7f9911ab5d82 [ 29.277504] 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 [ 29.279693] RSP: 002b:00007ffd62febb28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.280643] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9911ab5d82 [ 29.281514] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9910eef000 [ 29.282378] RBP: 00007f9910eef000 R08: 0000000000000009 R09: 0000000000001000 [ 29.283239] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6e9b51ec0 [ 29.284136] R13: 00007ffd62febb40 R14: 00007ffd62febb70 R15: 00007ffd62febed0 [ 29.285020] [ 29.285311] [ 29.285530] Allocated by task 212: [ 29.285963] kasan_save_stack+0x22/0x50 [ 29.286476] kasan_set_track+0x25/0x30 [ 29.286985] __kasan_slab_alloc+0x59/0x70 [ 29.287518] kmem_cache_alloc+0x16b/0x370 [ 29.288042] vm_area_dup+0x20/0x160 [ 29.288517] __split_vma+0x170/0x950 [ 29.288991] split_vma+0xc6/0x110 [ 29.289439] mprotect_fixup+0x8d2/0xb30 [ 29.289963] do_mprotect_pkey+0x87e/0xd40 [ 29.290493] __x64_sys_mprotect+0x78/0xc0 [ 29.291022] do_syscall_64+0x3f/0x90 [ 29.291507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.292173] [ 29.292395] Freed by task 212: [ 29.292794] kasan_save_stack+0x22/0x50 [ 29.293303] kasan_set_track+0x25/0x30 [ 29.293813] kasan_save_free_info+0x2b/0x50 [ 29.294363] __kasan_slab_free+0x10a/0x190 [ 29.294904] kmem_cache_free+0x10d/0x4d0 [ 29.295424] rcu_core+0x8c8/0x2860 [ 29.295877] __do_softirq+0x1b7/0x7d4 [ 29.296374] [ 29.296591] Last potentially related work creation: [ 29.297196] kasan_save_stack+0x22/0x50 [ 29.297711] __kasan_record_aux_stack+0x8e/0xa0 [ 29.298300] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.298960] remove_vma+0x139/0x170 [ 29.299418] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.299987] do_vmi_munmap+0x1f1/0x2b0 [ 29.300495] __vm_munmap+0x138/0x3a0 [ 29.300972] __x64_sys_munmap+0x59/0x80 [ 29.301472] do_syscall_64+0x3f/0x90 [ 29.301961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.302620] [ 29.302841] The buggy address belongs to the object at ffff88800e080828 [ 29.302841] which belongs to the cache vm_area_struct of size 168 [ 29.304360] The buggy address is located 88 bytes inside of [ 29.304360] freed 168-byte region [ffff88800e080828, ffff88800e0808d0) [ 29.305799] [ 29.306018] The buggy address belongs to the physical page: [ 29.306697] page:0000000074dad71e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe080 [ 29.307807] memcg:ffff88800e938f01 [ 29.308247] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.308958] page_type: 0xffffffff() [ 29.309418] raw: 0100000000000200 ffff8880087a0c80 ffffea0000376d40 dead000000000005 [ 29.310357] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e938f01 [ 29.311287] page dumped because: kasan: bad access detected [ 29.311970] [ 29.312195] Memory state around the buggy address: [ 29.312784] ffff88800e080780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.313658] ffff88800e080800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.314536] >ffff88800e080880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.315403] ^ [ 29.315816] ffff88800e080900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.316701] ffff88800e080980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.317560] ================================================================== [ 29.318830] Disabling lock debugging due to kernel taint [ 31.972221] BUG: Bad rss-counter state mm:0000000004ff8a9b type:MM_FILEPAGES val:33 [ 31.972968] BUG: Bad rss-counter state mm:0000000004ff8a9b type:MM_ANONPAGES val:22 [ 32.430896] BUG: Bad rss-counter state mm:000000008ee2f50f type:MM_FILEPAGES val:33 [ 32.431882] BUG: Bad rss-counter state mm:000000008ee2f50f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19508' (ECDSA) to the list of known hosts. 2023/06/21 00:50:53 fuzzer started 2023/06/21 00:50:53 dialing manager at localhost:36067 2023/06/21 00:50:53 checking machine... 2023/06/21 00:50:53 checking revisions... [ 33.099124] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:50:53 testing simple program... [ 33.130266] cgroup: Unknown subsys name 'net' [ 33.166553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:50:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888015ba8000 RSI=ffffffff81ef7198 RDI=ffff88800ebc6438 RBP=0000000000000001 RSP=ffff88800f77f8e8 R8 =0000000000000002 R9 =0000000000000007 R10=0000000000000011 R11=0000000000000001 R12=ffff88800e66c1a0 R13=0000000000000007 R14=0000000000000059 R15=0000000000000011 RIP=ffffffff81ef71a3 RFL=00000212 [----A--] 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 00007f336aeda900 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=00007f336b4920b0 CR3=000000000e20e000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007faeb54dfd40 CR3=000000000d85c000 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=461557622311f8a0294475d5d2a33631 XMM02=000000000011a248ec2efd57dc4c00df XMM03=000000000012136877641d54b09a608c XMM04=de46d1dbbbe9a95400000000000ae988 XMM05=286880d928a6b2b20000000000132398 XMM06=4fda316b135da52b00000000001317c0 XMM07=e042d86d42eb936e0000000000121640 XMM08=77641d54b09a608c000000000011a2a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000