syzkaller login: [ 38.825314] BUG: Bad rss-counter state mm:00000000d8d8728b type:MM_FILEPAGES val:33 [ 38.826566] BUG: Bad rss-counter state mm:00000000d8d8728b type:MM_ANONPAGES val:22 [ 38.866357] ================================================================== [ 38.867384] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.868424] Read of size 8 at addr ffff88800e29a140 by task sshd/220 [ 38.869326] [ 38.869541] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.870477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.871483] Call Trace: [ 38.871897] [ 38.872180] dump_stack_lvl+0x91/0xf0 [ 38.872666] print_report+0xcc/0x620 [ 38.873148] ? __virt_addr_valid+0x102/0x340 [ 38.873725] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.874340] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.875101] kasan_report+0xbe/0xf0 [ 38.875573] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876241] vma_interval_tree_remove+0xc75/0xec0 [ 38.876912] vma_prepare+0xc54/0x11a0 [ 38.877404] __split_vma+0x5af/0x950 [ 38.877916] ? __pfx___split_vma+0x10/0x10 [ 38.878464] ? find_held_lock+0x2c/0x110 [ 38.879047] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.879713] ? lock_is_held_type+0x9f/0x120 [ 38.880262] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.880860] ? mtree_range_walk+0x632/0x900 [ 38.881409] ? mas_walk+0x5c7/0x7c0 [ 38.881894] do_vmi_munmap+0x1f1/0x2b0 [ 38.882381] mmap_region+0x1f9/0x2660 [ 38.882855] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.883380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.884101] ? __pfx_lock_acquire+0x10/0x10 [ 38.884634] ? __pfx_mmap_region+0x10/0x10 [ 38.885165] ? security_mmap_addr+0x7d/0xa0 [ 38.885699] ? get_unmapped_area+0x1f5/0x3f0 [ 38.886266] do_mmap+0x854/0xf00 [ 38.886697] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.887185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.887746] ksys_mmap_pgoff+0x3af/0x500 [ 38.888252] do_syscall_64+0x3f/0x90 [ 38.888726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889371] RIP: 0033:0x7f456d0f3d82 [ 38.889840] 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 [ 38.891981] RSP: 002b:00007ffcf04fc788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.892876] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f456d0f3d82 [ 38.893721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f456c52d000 [ 38.894565] RBP: 00007f456c52d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.895397] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b31cb9ec0 [ 38.896239] R13: 00007ffcf04fc7a0 R14: 00007ffcf04fc7d0 R15: 00007ffcf04fcb30 [ 38.897080] [ 38.897367] [ 38.897578] Allocated by task 213: [ 38.898014] kasan_save_stack+0x22/0x50 [ 38.898509] kasan_set_track+0x25/0x30 [ 38.898997] __kasan_slab_alloc+0x59/0x70 [ 38.899510] kmem_cache_alloc+0x16b/0x370 [ 38.900019] vm_area_dup+0x20/0x160 [ 38.900474] __split_vma+0x170/0x950 [ 38.900932] split_vma+0xc6/0x110 [ 38.901362] mprotect_fixup+0x8d2/0xb30 [ 38.901862] do_mprotect_pkey+0x87e/0xd40 [ 38.902382] __x64_sys_mprotect+0x78/0xc0 [ 38.902897] do_syscall_64+0x3f/0x90 [ 38.903365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903997] [ 38.904208] Freed by task 213: [ 38.904594] kasan_save_stack+0x22/0x50 [ 38.905090] kasan_set_track+0x25/0x30 [ 38.905573] kasan_save_free_info+0x2b/0x50 [ 38.906113] __kasan_slab_free+0x10a/0x190 [ 38.906637] kmem_cache_free+0x10d/0x4d0 [ 38.907196] rcu_core+0x8c8/0x2860 [ 38.907637] __do_softirq+0x1b7/0x7d4 [ 38.908116] [ 38.908334] Last potentially related work creation: [ 38.908904] kasan_save_stack+0x22/0x50 [ 38.909401] __kasan_record_aux_stack+0x8e/0xa0 [ 38.909974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.910608] remove_vma+0x139/0x170 [ 38.911052] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.911603] do_vmi_munmap+0x1f1/0x2b0 [ 38.912080] __vm_munmap+0x138/0x3a0 [ 38.912547] __x64_sys_munmap+0x59/0x80 [ 38.913040] do_syscall_64+0x3f/0x90 [ 38.913506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914169] [ 38.914380] The buggy address belongs to the object at ffff88800e29a0e8 [ 38.914380] which belongs to the cache vm_area_struct of size 168 [ 38.915833] The buggy address is located 88 bytes inside of [ 38.915833] freed 168-byte region [ffff88800e29a0e8, ffff88800e29a190) [ 38.917219] [ 38.917434] The buggy address belongs to the physical page: [ 38.918094] page:00000000d9ccf611 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe29a [ 38.919168] memcg:ffff88800d2fa501 [ 38.919591] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.920281] page_type: 0xffffffff() [ 38.920735] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.921639] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2fa501 [ 38.922559] page dumped because: kasan: bad access detected [ 38.923209] [ 38.923423] Memory state around the buggy address: [ 38.923995] ffff88800e29a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.924837] ffff88800e29a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.925712] >ffff88800e29a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.926574] ^ [ 38.927208] ffff88800e29a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.928050] ffff88800e29a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.928891] ================================================================== [ 38.929890] Disabling lock debugging due to kernel taint [ 40.876808] BUG: Bad rss-counter state mm:00000000da4e55a0 type:MM_FILEPAGES val:33 [ 40.877869] BUG: Bad rss-counter state mm:00000000da4e55a0 type:MM_ANONPAGES val:22 [ 41.440282] BUG: Bad rss-counter state mm:000000001c3e765a type:MM_FILEPAGES val:33 [ 41.441262] BUG: Bad rss-counter state mm:000000001c3e765a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59887' (ECDSA) to the list of known hosts. 2023/06/20 17:18:22 fuzzer started 2023/06/20 17:18:22 dialing manager at localhost:36067 2023/06/20 17:18:22 checking machine... 2023/06/20 17:18:22 checking revisions... [ 42.073609] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:18:23 testing simple program... [ 42.126514] cgroup: Unknown subsys name 'net' [ 42.163627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:18:22 Registers: info registers vcpu 0 RAX=ffffffff8180b006 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002d4de8d RSI=ffffffff8180b006 RDI=ffff888016a6f4d8 RBP=ffff888016a6f4a8 RSP=ffff888016a6f408 R8 =0000000000000001 R9 =ffff888016a6f450 R10=0000000000038001 R11=0000000000021eef R12=ffff888016a6f4d8 R13=0000000000000000 R14=ffff88801a19b680 R15=ffff888013bd3720 RIP=ffffffff813ad474 RFL=00000286 [--S--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 00007fe2d1f54900 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=00007fe2d250b618 CR3=00000000180fe000 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=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=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=00007f570e270d00 CR3=0000000010262000 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=5ce6aaf3db2fd38b904c79b35fe9dff9 XMM02=000000000011b850ec2efd57dc4c00df XMM03=00000000001221f0e73e2decc948e671 XMM04=f2fefff8cf48a52600000000000ae988 XMM05=19e9129bd510f2350000000000131e08 XMM06=4fda316b135da52b0000000000131c90 XMM07=e042d86d42eb936e00000000001224c8 XMM08=e73e2decc948e671000000000011b8b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000