syzkaller login: [ 30.447762] BUG: Bad rss-counter state mm:000000001f7c2272 type:MM_FILEPAGES val:33 [ 30.448887] BUG: Bad rss-counter state mm:000000001f7c2272 type:MM_ANONPAGES val:22 [ 30.621655] ================================================================== [ 30.622819] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.624037] Read of size 8 at addr ffff888016eb3058 by task sshd/221 [ 30.624944] [ 30.625166] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.626066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.627056] Call Trace: [ 30.627392] [ 30.627691] dump_stack_lvl+0x91/0xf0 [ 30.628185] print_report+0xcc/0x620 [ 30.628671] ? __virt_addr_valid+0x102/0x340 [ 30.629229] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.629851] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.630493] kasan_report+0xbe/0xf0 [ 30.630983] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.631630] vma_interval_tree_remove+0xc75/0xec0 [ 30.632250] vma_prepare+0xc54/0x11a0 [ 30.632765] __split_vma+0x5af/0x950 [ 30.633258] ? __pfx___split_vma+0x10/0x10 [ 30.633826] ? find_held_lock+0x2c/0x110 [ 30.634393] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.634992] ? lock_is_held_type+0x9f/0x120 [ 30.635587] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.636244] ? mtree_range_walk+0x632/0x900 [ 30.636829] ? mas_walk+0x5c7/0x7c0 [ 30.637329] do_vmi_munmap+0x1f1/0x2b0 [ 30.637834] mmap_region+0x1f9/0x2660 [ 30.638336] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.638866] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.639596] ? __pfx_lock_acquire+0x10/0x10 [ 30.640140] ? __pfx_mmap_region+0x10/0x10 [ 30.640675] ? security_mmap_addr+0x7d/0xa0 [ 30.641223] ? get_unmapped_area+0x1f5/0x3f0 [ 30.641813] do_mmap+0x854/0xf00 [ 30.642266] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.642771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.643342] ksys_mmap_pgoff+0x3af/0x500 [ 30.643853] do_syscall_64+0x3f/0x90 [ 30.644333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.644977] RIP: 0033:0x7f3cb143cd82 [ 30.645434] 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 [ 30.647583] RSP: 002b:00007fffe44a8848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.648494] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cb143cd82 [ 30.649341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3cb0876000 [ 30.650188] RBP: 00007f3cb0876000 R08: 0000000000000009 R09: 0000000000001000 [ 30.651049] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f243e5980 [ 30.651921] R13: 00007fffe44a8860 R14: 00007fffe44a8890 R15: 00007fffe44a8bf0 [ 30.652789] [ 30.653084] [ 30.653301] Allocated by task 214: [ 30.653728] kasan_save_stack+0x22/0x50 [ 30.654237] kasan_set_track+0x25/0x30 [ 30.654728] __kasan_slab_alloc+0x59/0x70 [ 30.655256] kmem_cache_alloc+0x16b/0x370 [ 30.655809] vm_area_dup+0x20/0x160 [ 30.656268] __split_vma+0x170/0x950 [ 30.656738] split_vma+0xc6/0x110 [ 30.657178] mprotect_fixup+0x8d2/0xb30 [ 30.657683] do_mprotect_pkey+0x87e/0xd40 [ 30.658206] __x64_sys_mprotect+0x78/0xc0 [ 30.658729] do_syscall_64+0x3f/0x90 [ 30.659212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.659869] [ 30.660091] Freed by task 214: [ 30.660479] kasan_save_stack+0x22/0x50 [ 30.660999] kasan_set_track+0x25/0x30 [ 30.661504] kasan_save_free_info+0x2b/0x50 [ 30.662034] __kasan_slab_free+0x10a/0x190 [ 30.662583] kmem_cache_free+0x10d/0x4d0 [ 30.663093] rcu_core+0x8c8/0x2860 [ 30.663553] __do_softirq+0x1b7/0x7d4 [ 30.664038] [ 30.664256] Last potentially related work creation: [ 30.664839] kasan_save_stack+0x22/0x50 [ 30.665404] __kasan_record_aux_stack+0x8e/0xa0 [ 30.666007] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.666673] remove_vma+0x139/0x170 [ 30.667135] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.667716] do_vmi_munmap+0x1f1/0x2b0 [ 30.668211] __vm_munmap+0x138/0x3a0 [ 30.668687] __x64_sys_munmap+0x59/0x80 [ 30.669194] do_syscall_64+0x3f/0x90 [ 30.669694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.670352] [ 30.670571] The buggy address belongs to the object at ffff888016eb3000 [ 30.670571] which belongs to the cache vm_area_struct of size 168 [ 30.672088] The buggy address is located 88 bytes inside of [ 30.672088] freed 168-byte region [ffff888016eb3000, ffff888016eb30a8) [ 30.673488] [ 30.673702] The buggy address belongs to the physical page: [ 30.674359] page:00000000e1a77cec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16eb3 [ 30.675471] memcg:ffff88800e0feb01 [ 30.675895] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.676548] page_type: 0xffffffff() [ 30.676997] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.677915] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0feb01 [ 30.678812] page dumped because: kasan: bad access detected [ 30.679489] [ 30.679707] Memory state around the buggy address: [ 30.680281] ffff888016eb2f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 30.681150] ffff888016eb2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.682004] >ffff888016eb3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.682852] ^ [ 30.683604] ffff888016eb3080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.684457] ffff888016eb3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.685303] ================================================================== [ 30.686252] Disabling lock debugging due to kernel taint [ 33.261976] BUG: Bad rss-counter state mm:000000004e80f3df type:MM_FILEPAGES val:33 [ 33.263190] BUG: Bad rss-counter state mm:000000004e80f3df type:MM_ANONPAGES val:22 [ 33.627940] BUG: Bad rss-counter state mm:00000000405b2e94 type:MM_FILEPAGES val:33 [ 33.629112] BUG: Bad rss-counter state mm:00000000405b2e94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53168' (ECDSA) to the list of known hosts. 2023/06/20 23:56:36 fuzzer started 2023/06/20 23:56:36 dialing manager at localhost:36067 2023/06/20 23:56:36 checking machine... 2023/06/20 23:56:36 checking revisions... [ 34.308057] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:56:36 testing simple program... [ 34.353406] cgroup: Unknown subsys name 'net' [ 34.392098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:56:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880168d3680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8171b01d RDI=ffff8880168d3a74 RBP=ffff8880168d3680 RSP=ffff88800fbf7e48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880168d3680 R13=00007fff2c2ed000 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff8137459d RFL=00000217 [----APC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff242f09900 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=00007fff2c2ed000 CR3=000000000f80a000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c616e694172657420322e052e302e00 XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f9f460408a8 CR3=000000000cac2000 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=c51e196f2a6aa39be54a4e85a9bd3331 XMM02=000000000011a868ec2efd57dc4c00df XMM03=0000000000121d38adf72c78fd133208 XMM04=abc9419cb771616a00000000000ae988 XMM05=319b8a4d0145e0240000000000132a00 XMM06=c291bd5c70af25b90000000000131aa0 XMM07=e042d86d42eb936e0000000000121fb8 XMM08=adf72c78fd133208000000000011a8c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000