syzkaller login: [ 40.198694] BUG: Bad rss-counter state mm:000000001d5f6de4 type:MM_FILEPAGES val:33 [ 40.199902] BUG: Bad rss-counter state mm:000000001d5f6de4 type:MM_ANONPAGES val:22 [ 40.237230] ================================================================== [ 40.238179] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.239230] Read of size 8 at addr ffff88800e016880 by task sshd/222 [ 40.240005] [ 40.240356] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.241222] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.242201] Call Trace: [ 40.242533] [ 40.242842] dump_stack_lvl+0x91/0xf0 [ 40.243340] print_report+0xcc/0x620 [ 40.243828] ? __virt_addr_valid+0x102/0x340 [ 40.244383] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.245005] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.245630] kasan_report+0xbe/0xf0 [ 40.246113] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.246750] vma_interval_tree_remove+0xc75/0xec0 [ 40.247351] vma_prepare+0xc54/0x11a0 [ 40.247830] __split_vma+0x5af/0x950 [ 40.248304] ? __pfx___split_vma+0x10/0x10 [ 40.248834] ? find_held_lock+0x2c/0x110 [ 40.249359] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.249924] ? lock_is_held_type+0x9f/0x120 [ 40.250475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.251091] ? mtree_range_walk+0x632/0x900 [ 40.251650] ? mas_walk+0x5c7/0x7c0 [ 40.252126] do_vmi_munmap+0x1f1/0x2b0 [ 40.252618] mmap_region+0x1f9/0x2660 [ 40.253101] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.253616] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.254327] ? __pfx_lock_acquire+0x10/0x10 [ 40.254889] ? __pfx_mmap_region+0x10/0x10 [ 40.255416] ? security_mmap_addr+0x7d/0xa0 [ 40.255944] ? get_unmapped_area+0x1f5/0x3f0 [ 40.256494] do_mmap+0x854/0xf00 [ 40.256938] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.257430] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.257996] ksys_mmap_pgoff+0x3af/0x500 [ 40.258502] do_syscall_64+0x3f/0x90 [ 40.258989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.259646] RIP: 0033:0x7f2e98fa6d82 [ 40.260114] 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 [ 40.262236] RSP: 002b:00007ffdeef5d1b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.263168] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e98fa6d82 [ 40.264013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e983e0000 [ 40.264854] RBP: 00007f2e983e0000 R08: 0000000000000009 R09: 0000000000001000 [ 40.265708] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0d26dcec0 [ 40.266557] R13: 00007ffdeef5d1d0 R14: 00007ffdeef5d200 R15: 00007ffdeef5d560 [ 40.267419] [ 40.267711] [ 40.267927] Allocated by task 215: [ 40.268356] kasan_save_stack+0x22/0x50 [ 40.268858] kasan_set_track+0x25/0x30 [ 40.269349] __kasan_slab_alloc+0x59/0x70 [ 40.269875] kmem_cache_alloc+0x16b/0x370 [ 40.270386] vm_area_dup+0x20/0x160 [ 40.270845] __split_vma+0x170/0x950 [ 40.271314] split_vma+0xc6/0x110 [ 40.271753] mprotect_fixup+0x8d2/0xb30 [ 40.272254] do_mprotect_pkey+0x87e/0xd40 [ 40.272775] __x64_sys_mprotect+0x78/0xc0 [ 40.273295] do_syscall_64+0x3f/0x90 [ 40.273764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.274404] [ 40.274621] Freed by task 215: [ 40.275035] kasan_save_stack+0x22/0x50 [ 40.275537] kasan_set_track+0x25/0x30 [ 40.276037] kasan_save_free_info+0x2b/0x50 [ 40.276566] __kasan_slab_free+0x10a/0x190 [ 40.277103] kmem_cache_free+0x10d/0x4d0 [ 40.277605] rcu_core+0x8c8/0x2860 [ 40.278053] __do_softirq+0x1b7/0x7d4 [ 40.278584] [ 40.278808] Last potentially related work creation: [ 40.279393] kasan_save_stack+0x22/0x50 [ 40.279912] __kasan_record_aux_stack+0x8e/0xa0 [ 40.280495] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.281131] remove_vma+0x139/0x170 [ 40.281590] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.282147] do_vmi_munmap+0x1f1/0x2b0 [ 40.282640] __vm_munmap+0x138/0x3a0 [ 40.283130] __x64_sys_munmap+0x59/0x80 [ 40.283637] do_syscall_64+0x3f/0x90 [ 40.284111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.284757] [ 40.284972] Second to last potentially related work creation: [ 40.285657] kasan_save_stack+0x22/0x50 [ 40.286162] __kasan_record_aux_stack+0x8e/0xa0 [ 40.286752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.287402] remove_vma+0x139/0x170 [ 40.287850] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.288414] do_vmi_munmap+0x1f1/0x2b0 [ 40.288901] mmap_region+0x1f9/0x2660 [ 40.289385] do_mmap+0x854/0xf00 [ 40.289837] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.290345] ksys_mmap_pgoff+0x3af/0x500 [ 40.290885] do_syscall_64+0x3f/0x90 [ 40.291375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.292050] [ 40.292273] The buggy address belongs to the object at ffff88800e016828 [ 40.292273] which belongs to the cache vm_area_struct of size 168 [ 40.293821] The buggy address is located 88 bytes inside of [ 40.293821] freed 168-byte region [ffff88800e016828, ffff88800e0168d0) [ 40.295319] [ 40.295545] The buggy address belongs to the physical page: [ 40.296242] page:00000000ffccd2d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe016 [ 40.297376] memcg:ffff88800de79f01 [ 40.297826] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.298502] page_type: 0xffffffff() [ 40.298989] raw: 0100000000000200 ffff88800879fc80 ffffea0000370040 dead000000000002 [ 40.299961] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de79f01 [ 40.300920] page dumped because: kasan: bad access detected [ 40.301616] [ 40.301840] Memory state around the buggy address: [ 40.302449] ffff88800e016780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 40.303360] ffff88800e016800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.304256] >ffff88800e016880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.305154] ^ [ 40.305581] ffff88800e016900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.306479] ffff88800e016980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 40.307391] ================================================================== [ 40.308404] Disabling lock debugging due to kernel taint [ 42.250120] BUG: Bad rss-counter state mm:00000000465b1a19 type:MM_FILEPAGES val:33 [ 42.251369] BUG: Bad rss-counter state mm:00000000465b1a19 type:MM_ANONPAGES val:22 [ 42.681107] BUG: Bad rss-counter state mm:000000002b030221 type:MM_FILEPAGES val:33 [ 42.682064] BUG: Bad rss-counter state mm:000000002b030221 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15907' (ECDSA) to the list of known hosts. 2023/06/19 14:13:33 fuzzer started 2023/06/19 14:13:33 dialing manager at localhost:44161 2023/06/19 14:13:33 checking machine... 2023/06/19 14:13:33 checking revisions... [ 43.422701] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:13:33 testing simple program... [ 43.481629] cgroup: Unknown subsys name 'net' [ 43.517799] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:13:31 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=1ffff110028c2ed6 RCX=0000000000000000 RDX=ffff888014618000 RSI=0000000000000000 RDI=ffffffff854ee9e0 RBP=ffffffff854ee9e0 RSP=ffff8880146176a0 R8 =0000000000000001 R9 =ffffed1002c6500a R10=ffff888016328057 R11=00000000000b6c88 R12=dffffc0000000000 R13=ffffffff854ee9e0 R14=ffff888016328050 R15=ffff8880146178c0 RIP=ffffffff81482082 RFL=00000202 [-------] 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 00007f8818b2a900 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=00007f8817f71d80 CR3=000000000d4bc000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=df8454d2f00ba5cc00000000000ae988 XMM05=b8b39e26dcf816a00000000000135650 XMM06=00c3ffa147b8d8570000000000134380 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800e4f7440 RSP=ffff88800e4f7378 R8 =ffffffff860d68fa R9 =ffff88800e4f7428 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800e4f7448 R13=ffff88800e4f7430 R14=ffff88800e4f7520 R15=ffff88800e4f73e8 RIP=ffffffff81130bd6 RFL=00000246 [---Z-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 00007f6e06ee3900 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=00007ffd31198000 CR3=000000000c684000 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=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