syzkaller login: [ 200.303339] BUG: Bad rss-counter state mm:00000000b9730704 type:MM_FILEPAGES val:33 [ 200.304510] BUG: Bad rss-counter state mm:00000000b9730704 type:MM_ANONPAGES val:22 [ 200.337296] ================================================================== [ 200.338250] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 200.339258] Read of size 8 at addr ffff88800d4e3140 by task sshd/221 [ 200.340029] [ 200.340243] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 200.341216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 200.342129] Call Trace: [ 200.342451] [ 200.342734] dump_stack_lvl+0x91/0xf0 [ 200.343211] print_report+0xcc/0x620 [ 200.343683] ? __virt_addr_valid+0x102/0x340 [ 200.344218] ? vma_interval_tree_remove+0xc75/0xec0 [ 200.344833] ? vma_interval_tree_remove+0xc75/0xec0 [ 200.345438] kasan_report+0xbe/0xf0 [ 200.345906] ? vma_interval_tree_remove+0xc75/0xec0 [ 200.346534] vma_interval_tree_remove+0xc75/0xec0 [ 200.347122] vma_prepare+0xc54/0x11a0 [ 200.347592] __split_vma+0x5af/0x950 [ 200.348064] ? __pfx___split_vma+0x10/0x10 [ 200.348621] ? find_held_lock+0x2c/0x110 [ 200.349143] do_vmi_align_munmap+0x2ba/0x11f0 [ 200.349715] ? lock_is_held_type+0x9f/0x120 [ 200.350253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 200.350854] ? mtree_range_walk+0x632/0x900 [ 200.351392] ? mas_walk+0x5c7/0x7c0 [ 200.351853] do_vmi_munmap+0x1f1/0x2b0 [ 200.352354] mmap_region+0x1f9/0x2660 [ 200.352826] ? vm_mmap_pgoff+0x15c/0x3a0 [ 200.353331] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 200.354033] ? __pfx_lock_acquire+0x10/0x10 [ 200.354569] ? __pfx_mmap_region+0x10/0x10 [ 200.355094] ? security_mmap_addr+0x7d/0xa0 [ 200.355616] ? get_unmapped_area+0x1f5/0x3f0 [ 200.356162] do_mmap+0x854/0xf00 [ 200.356619] vm_mmap_pgoff+0x1a6/0x3a0 [ 200.357116] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 200.357671] ksys_mmap_pgoff+0x3af/0x500 [ 200.358177] do_syscall_64+0x3f/0x90 [ 200.358655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 200.359286] RIP: 0033:0x7f3b537f6d82 [ 200.359731] 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 [ 200.361846] RSP: 002b:00007ffdbdb77b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 200.362760] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b537f6d82 [ 200.363612] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b52c30000 [ 200.364470] RBP: 00007f3b52c30000 R08: 0000000000000009 R09: 0000000000001000 [ 200.365305] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da405faec0 [ 200.366362] R13: 00007ffdbdb77b90 R14: 00007ffdbdb77bc0 R15: 00007ffdbdb77f20 [ 200.367221] [ 200.367516] [ 200.367730] Allocated by task 214: [ 200.368177] kasan_save_stack+0x22/0x50 [ 200.368697] kasan_set_track+0x25/0x30 [ 200.369182] __kasan_slab_alloc+0x59/0x70 [ 200.369703] kmem_cache_alloc+0x16b/0x370 [ 200.370216] vm_area_dup+0x20/0x160 [ 200.370670] __split_vma+0x170/0x950 [ 200.371133] split_vma+0xc6/0x110 [ 200.371564] mprotect_fixup+0x8d2/0xb30 [ 200.372061] do_mprotect_pkey+0x87e/0xd40 [ 200.372581] __x64_sys_mprotect+0x78/0xc0 [ 200.373101] do_syscall_64+0x3f/0x90 [ 200.373565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 200.374197] [ 200.374419] Freed by task 214: [ 200.374811] kasan_save_stack+0x22/0x50 [ 200.375316] kasan_set_track+0x25/0x30 [ 200.375797] kasan_save_free_info+0x2b/0x50 [ 200.376337] __kasan_slab_free+0x10a/0x190 [ 200.376873] kmem_cache_free+0x10d/0x4d0 [ 200.377384] rcu_core+0x8c8/0x2860 [ 200.377837] __do_softirq+0x1b7/0x7d4 [ 200.378315] [ 200.378535] Last potentially related work creation: [ 200.379111] kasan_save_stack+0x22/0x50 [ 200.379618] __kasan_record_aux_stack+0x8e/0xa0 [ 200.380189] __call_rcu_common.constprop.0+0x6a/0xb90 [ 200.380833] remove_vma+0x139/0x170 [ 200.381286] do_vmi_align_munmap+0xd4a/0x11f0 [ 200.381864] do_vmi_munmap+0x1f1/0x2b0 [ 200.382348] __vm_munmap+0x138/0x3a0 [ 200.382823] __x64_sys_munmap+0x59/0x80 [ 200.383325] do_syscall_64+0x3f/0x90 [ 200.383808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 200.384468] [ 200.384687] The buggy address belongs to the object at ffff88800d4e30e8 [ 200.384687] which belongs to the cache vm_area_struct of size 168 [ 200.386150] The buggy address is located 88 bytes inside of [ 200.386150] freed 168-byte region [ffff88800d4e30e8, ffff88800d4e3190) [ 200.387549] [ 200.387766] The buggy address belongs to the physical page: [ 200.388431] page:0000000086f6b470 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4e3 [ 200.389513] memcg:ffff88800ce3c001 [ 200.389948] flags: 0x100000000000200(slab|node=0|zone=1) [ 200.390609] page_type: 0xffffffff() [ 200.391060] raw: 0100000000000200 ffff88800879fc80 ffffea000036f400 dead000000000004 [ 200.391975] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce3c001 [ 200.392891] page dumped because: kasan: bad access detected [ 200.393550] [ 200.393765] Memory state around the buggy address: [ 200.394351] ffff88800d4e3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 200.395204] ffff88800d4e3080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 200.396065] >ffff88800d4e3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 200.396944] ^ [ 200.397730] ffff88800d4e3180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 200.398643] ffff88800d4e3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 200.399524] ================================================================== [ 200.400569] Disabling lock debugging due to kernel taint [ 202.443561] BUG: Bad rss-counter state mm:0000000096cd4bdc type:MM_FILEPAGES val:33 [ 202.444736] BUG: Bad rss-counter state mm:0000000096cd4bdc type:MM_ANONPAGES val:22 [ 202.883449] BUG: Bad rss-counter state mm:000000009787f72f type:MM_FILEPAGES val:33 [ 202.884626] BUG: Bad rss-counter state mm:000000009787f72f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17351' (ECDSA) to the list of known hosts. 2023/06/19 22:29:52 fuzzer started 2023/06/19 22:29:52 dialing manager at localhost:44161 2023/06/19 22:29:52 checking machine... 2023/06/19 22:29:52 checking revisions... [ 203.551357] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:29:52 testing simple program... [ 203.596423] cgroup: Unknown subsys name 'net' [ 203.637947] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:27:02 Registers: info registers vcpu 0 RAX=ffffffff863b59a3 RBX=0000000000000001 RCX=ffffffff863b599e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801beb74b0 RSP=ffff88801beb73e8 R8 =ffffffff863b59a2 R9 =ffff88801beb7498 R10=0000000000038001 R11=000000000008b3a3 R12=ffff88801beb74b8 R13=ffff88801beb74a0 R14=ffff88801beb7499 R15=ffff88801beb7458 RIP=ffffffff81130ab5 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 00007ff2bcd77900 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=00007fff7a267000 CR3=000000000c9ca000 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=00007f9f98de4e80 CR3=000000000cc4a000 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=1e15c5cee83c3c92f24aa95f028f4a33 XMM02=000000000012fd90eff9b2d0a8fce9cb XMM03=000000000012fe602c67c8bc2e329bc3 XMM04=8b4a2645b5adc37000000000000ae988 XMM05=32e1035a5201b1ee0000000000148350 XMM06=c291bd5c70af25b900000000001473f0 XMM07=e042d86d42eb936e0000000000137d70 XMM08=ab1981c3f4499b63000000000012fe60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000