syzkaller login: [ 33.335290] BUG: Bad rss-counter state mm:0000000085871fe6 type:MM_FILEPAGES val:33 [ 33.336555] BUG: Bad rss-counter state mm:0000000085871fe6 type:MM_ANONPAGES val:22 [ 33.477203] ================================================================== [ 33.478327] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.479500] Read of size 8 at addr ffff88801870b3f8 by task sshd/221 [ 33.480278] [ 33.480424] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.480989] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.481637] Call Trace: [ 33.481849] [ 33.482056] dump_stack_lvl+0x91/0xf0 [ 33.482382] print_report+0xcc/0x620 [ 33.482704] ? __virt_addr_valid+0x102/0x340 [ 33.483070] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.483484] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.483886] kasan_report+0xbe/0xf0 [ 33.484194] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.484603] vma_interval_tree_remove+0xc75/0xec0 [ 33.484991] vma_prepare+0xc54/0x11a0 [ 33.485307] __split_vma+0x5af/0x950 [ 33.485618] ? __pfx___split_vma+0x10/0x10 [ 33.485967] ? find_held_lock+0x2c/0x110 [ 33.486304] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.486684] ? lock_is_held_type+0x9f/0x120 [ 33.487047] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.487458] ? mtree_range_walk+0x632/0x900 [ 33.487831] ? mas_walk+0x5c7/0x7c0 [ 33.488150] do_vmi_munmap+0x1f1/0x2b0 [ 33.488478] mmap_region+0x1f9/0x2660 [ 33.488798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.489142] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.489622] ? __pfx_lock_acquire+0x10/0x10 [ 33.489978] ? __pfx_mmap_region+0x10/0x10 [ 33.490336] ? security_mmap_addr+0x7d/0xa0 [ 33.490694] ? get_unmapped_area+0x1f5/0x3f0 [ 33.491069] do_mmap+0x854/0xf00 [ 33.491378] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.491716] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.492097] ksys_mmap_pgoff+0x3af/0x500 [ 33.492436] do_syscall_64+0x3f/0x90 [ 33.492759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.493192] RIP: 0033:0x7f1e91a17d82 [ 33.493499] 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 [ 33.494949] RSP: 002b:00007ffe7bf38138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.495571] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e91a17d82 [ 33.496147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e90e51000 [ 33.496719] RBP: 00007f1e90e51000 R08: 0000000000000009 R09: 0000000000001000 [ 33.497292] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2bf582ec0 [ 33.497864] R13: 00007ffe7bf38150 R14: 00007ffe7bf38180 R15: 00007ffe7bf384e0 [ 33.498455] [ 33.498649] [ 33.498792] Allocated by task 214: [ 33.499082] kasan_save_stack+0x22/0x50 [ 33.499431] kasan_set_track+0x25/0x30 [ 33.499763] __kasan_slab_alloc+0x59/0x70 [ 33.500114] kmem_cache_alloc+0x16b/0x370 [ 33.500460] vm_area_dup+0x20/0x160 [ 33.500764] __split_vma+0x170/0x950 [ 33.501081] split_vma+0xc6/0x110 [ 33.501382] mprotect_fixup+0x8d2/0xb30 [ 33.501723] do_mprotect_pkey+0x87e/0xd40 [ 33.502074] __x64_sys_mprotect+0x78/0xc0 [ 33.502427] do_syscall_64+0x3f/0x90 [ 33.502748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.503177] [ 33.503324] Freed by task 214: [ 33.503587] kasan_save_stack+0x22/0x50 [ 33.503925] kasan_set_track+0x25/0x30 [ 33.504255] kasan_save_free_info+0x2b/0x50 [ 33.504614] __kasan_slab_free+0x10a/0x190 [ 33.504973] kmem_cache_free+0x10d/0x4d0 [ 33.505318] rcu_core+0x8c8/0x2860 [ 33.505619] __do_softirq+0x1b7/0x7d4 [ 33.505941] [ 33.506090] Last potentially related work creation: [ 33.506486] kasan_save_stack+0x22/0x50 [ 33.506822] __kasan_record_aux_stack+0x8e/0xa0 [ 33.507208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.507657] remove_vma+0x139/0x170 [ 33.507961] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.508340] do_vmi_munmap+0x1f1/0x2b0 [ 33.508672] __vm_munmap+0x138/0x3a0 [ 33.508998] __x64_sys_munmap+0x59/0x80 [ 33.509334] do_syscall_64+0x3f/0x90 [ 33.509661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.510096] [ 33.510238] The buggy address belongs to the object at ffff88801870b3a0 [ 33.510238] which belongs to the cache vm_area_struct of size 168 [ 33.511224] The buggy address is located 88 bytes inside of [ 33.511224] freed 168-byte region [ffff88801870b3a0, ffff88801870b448) [ 33.512159] [ 33.512300] The buggy address belongs to the physical page: [ 33.512748] page:000000002f3723a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1870b [ 33.513468] memcg:ffff88800972bf01 [ 33.513752] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.514183] page_type: 0xffffffff() [ 33.514482] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.515096] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800972bf01 [ 33.515713] page dumped because: kasan: bad access detected [ 33.516146] [ 33.516287] Memory state around the buggy address: [ 33.516673] ffff88801870b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.517239] ffff88801870b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.517805] >ffff88801870b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.518366] ^ [ 33.518935] ffff88801870b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.519520] ffff88801870b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.520093] ================================================================== [ 33.520705] Disabling lock debugging due to kernel taint [ 35.485144] BUG: Bad rss-counter state mm:00000000bfeb240c type:MM_FILEPAGES val:33 [ 35.486281] BUG: Bad rss-counter state mm:00000000bfeb240c type:MM_ANONPAGES val:22 [ 36.064169] BUG: Bad rss-counter state mm:00000000dec920bd type:MM_FILEPAGES val:33 [ 36.065413] BUG: Bad rss-counter state mm:00000000dec920bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1859' (ECDSA) to the list of known hosts. 2023/06/19 21:11:46 fuzzer started 2023/06/19 21:11:46 dialing manager at localhost:44161 2023/06/19 21:11:46 checking machine... 2023/06/19 21:11:46 checking revisions... [ 36.718202] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:11:47 testing simple program... [ 36.762728] cgroup: Unknown subsys name 'net' [ 36.810361] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:11:43 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800c808000 RSI=ffffffff821473d9 RDI=ffff88800c2d90b8 RBP=ffff88800c2d9028 RSP=ffff88800fc47d88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800c2d90b8 R13=ffffffff818cf549 R14=0000000000000000 R15=ffff88800d597d00 RIP=ffffffff818cf5f1 RFL=00000293 [--S-A-C] 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 00007f1e525f1900 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=00007f82813ee1a0 CR3=000000001861e000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f1e52ba90b0 CR3=000000001861e000 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=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