syzkaller login: [ 39.078120] BUG: Bad rss-counter state mm:0000000009a806c2 type:MM_FILEPAGES val:33 [ 39.079537] BUG: Bad rss-counter state mm:0000000009a806c2 type:MM_ANONPAGES val:22 [ 39.240224] ================================================================== [ 39.241345] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.242297] Read of size 8 at addr ffff888015b86968 by task sshd/219 [ 39.243254] [ 39.243486] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.244362] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.245378] Call Trace: [ 39.245702] [ 39.245991] dump_stack_lvl+0x91/0xf0 [ 39.246491] print_report+0xcc/0x620 [ 39.246986] ? __virt_addr_valid+0x102/0x340 [ 39.247541] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.248166] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.248829] kasan_report+0xbe/0xf0 [ 39.249315] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.249948] vma_interval_tree_remove+0xc75/0xec0 [ 39.250552] vma_prepare+0xc54/0x11a0 [ 39.251048] __split_vma+0x5af/0x950 [ 39.251522] ? __pfx___split_vma+0x10/0x10 [ 39.252057] ? find_held_lock+0x2c/0x110 [ 39.252589] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.253200] ? lock_is_held_type+0x9f/0x120 [ 39.253752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.254370] ? mtree_range_walk+0x632/0x900 [ 39.254930] ? mas_walk+0x5c7/0x7c0 [ 39.255408] do_vmi_munmap+0x1f1/0x2b0 [ 39.255923] mmap_region+0x1f9/0x2660 [ 39.256422] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.256958] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.257691] ? __pfx_lock_acquire+0x10/0x10 [ 39.258233] ? __pfx_mmap_region+0x10/0x10 [ 39.258764] ? security_mmap_addr+0x7d/0xa0 [ 39.259306] ? get_unmapped_area+0x1f5/0x3f0 [ 39.259861] do_mmap+0x854/0xf00 [ 39.260302] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.260816] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.261392] ksys_mmap_pgoff+0x3af/0x500 [ 39.261900] do_syscall_64+0x3f/0x90 [ 39.262388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.263032] RIP: 0033:0x7ffac35dfd82 [ 39.263504] 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 [ 39.265691] RSP: 002b:00007ffeeaa7e408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.266624] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffac35dfd82 [ 39.267497] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffac2a19000 [ 39.268363] RBP: 00007ffac2a19000 R08: 0000000000000009 R09: 0000000000001000 [ 39.269250] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fe8696ec0 [ 39.270102] R13: 00007ffeeaa7e420 R14: 00007ffeeaa7e450 R15: 00007ffeeaa7e7b0 [ 39.270974] [ 39.271287] [ 39.271507] Allocated by task 212: [ 39.271944] kasan_save_stack+0x22/0x50 [ 39.272481] kasan_set_track+0x25/0x30 [ 39.272982] __kasan_slab_alloc+0x59/0x70 [ 39.273516] kmem_cache_alloc+0x16b/0x370 [ 39.274032] vm_area_dup+0x20/0x160 [ 39.274487] __split_vma+0x170/0x950 [ 39.274967] split_vma+0xc6/0x110 [ 39.275428] mprotect_fixup+0x8d2/0xb30 [ 39.275941] do_mprotect_pkey+0x87e/0xd40 [ 39.276482] __x64_sys_mprotect+0x78/0xc0 [ 39.277011] do_syscall_64+0x3f/0x90 [ 39.277496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.278135] [ 39.278349] Freed by task 212: [ 39.278743] kasan_save_stack+0x22/0x50 [ 39.279255] kasan_set_track+0x25/0x30 [ 39.279749] kasan_save_free_info+0x2b/0x50 [ 39.280281] __kasan_slab_free+0x10a/0x190 [ 39.280831] kmem_cache_free+0x10d/0x4d0 [ 39.281356] rcu_core+0x8c8/0x2860 [ 39.281800] __do_softirq+0x1b7/0x7d4 [ 39.282275] [ 39.282490] Last potentially related work creation: [ 39.283077] kasan_save_stack+0x22/0x50 [ 39.283587] __kasan_record_aux_stack+0x8e/0xa0 [ 39.284163] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.284815] remove_vma+0x139/0x170 [ 39.285281] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.285839] do_vmi_munmap+0x1f1/0x2b0 [ 39.286341] __vm_munmap+0x138/0x3a0 [ 39.286812] __x64_sys_munmap+0x59/0x80 [ 39.287309] do_syscall_64+0x3f/0x90 [ 39.287783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.288441] [ 39.288680] Second to last potentially related work creation: [ 39.289373] kasan_save_stack+0x22/0x50 [ 39.289879] __kasan_record_aux_stack+0x8e/0xa0 [ 39.290464] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.291105] remove_vma+0x139/0x170 [ 39.291561] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.292124] do_vmi_munmap+0x1f1/0x2b0 [ 39.292617] mmap_region+0x1f9/0x2660 [ 39.293109] do_mmap+0x854/0xf00 [ 39.293541] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.294030] ksys_mmap_pgoff+0x3af/0x500 [ 39.294541] do_syscall_64+0x3f/0x90 [ 39.295015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.295657] [ 39.295875] The buggy address belongs to the object at ffff888015b86910 [ 39.295875] which belongs to the cache vm_area_struct of size 168 [ 39.297352] The buggy address is located 88 bytes inside of [ 39.297352] freed 168-byte region [ffff888015b86910, ffff888015b869b8) [ 39.298762] [ 39.298981] The buggy address belongs to the physical page: [ 39.299635] page:000000008e5ddc0b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b86 [ 39.300756] memcg:ffff88800b3e4f01 [ 39.301192] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.301894] page_type: 0xffffffff() [ 39.302351] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.303282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b3e4f01 [ 39.304191] page dumped because: kasan: bad access detected [ 39.304871] [ 39.305090] Memory state around the buggy address: [ 39.305668] ffff888015b86800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.306550] ffff888015b86880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.307425] >ffff888015b86900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.308297] ^ [ 39.309114] ffff888015b86980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.309987] ffff888015b86a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.310848] ================================================================== [ 39.312026] Disabling lock debugging due to kernel taint [ 41.341939] BUG: Bad rss-counter state mm:00000000e447fc4f type:MM_FILEPAGES val:33 [ 41.342978] BUG: Bad rss-counter state mm:00000000e447fc4f type:MM_ANONPAGES val:22 [ 41.814188] BUG: Bad rss-counter state mm:000000009c6d4360 type:MM_FILEPAGES val:33 [ 41.815347] BUG: Bad rss-counter state mm:000000009c6d4360 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37532' (ECDSA) to the list of known hosts. 2023/06/19 22:37:01 fuzzer started 2023/06/19 22:37:01 dialing manager at localhost:44161 2023/06/19 22:37:01 checking machine... 2023/06/19 22:37:01 checking revisions... [ 42.471008] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:37:01 testing simple program... [ 42.514530] cgroup: Unknown subsys name 'net' [ 42.553499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:37:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f5d36c0 RCX=0000000000000000 RDX=1ffff11001eba6d8 RSI=ffffffff83864d10 RDI=ffff88800f5d36c0 RBP=ffff88800f22fd90 RSP=ffff88800f22fc40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000040 R11=00000000000b6996 R12=ffffffff83864d10 R13=0000000000000000 R14=0000000000000000 R15=ffff88800f5d3030 RIP=ffffffff8180f3c0 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 00007fd29c9d0900 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=00007ffd0ee46000 CR3=000000001c982000 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=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 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=0000000000000001 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=00007f0d324317b0 CR3=000000000e902000 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=844f0d6249b930bfaa4acb83c12f6d73 XMM02=ec2efd57dc4c00df000000000011e418 XMM03=20c9b1bec520d7cb000000000011e4e8 XMM04=eb23b83584f4e2a000000000000ae988 XMM05=dfcdbad4f1609c3700000000001352c8 XMM06=851f6b5546dda01600000000001344a0 XMM07=e042d86d42eb936e0000000000124968 XMM08=20c9b1bec520d7cb000000000011e4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000