syzkaller login: [ 47.866370] BUG: Bad rss-counter state mm:00000000d8beb3b8 type:MM_FILEPAGES val:33 [ 47.867596] BUG: Bad rss-counter state mm:00000000d8beb3b8 type:MM_ANONPAGES val:22 [ 47.908021] ================================================================== [ 47.909074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.910100] Read of size 8 at addr ffff888015e77a50 by task sshd/226 [ 47.911063] [ 47.911307] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.912255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.913319] Call Trace: [ 47.913694] [ 47.913980] dump_stack_lvl+0x91/0xf0 [ 47.914465] print_report+0xcc/0x620 [ 47.914950] ? __virt_addr_valid+0x102/0x340 [ 47.915509] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.916146] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.916767] kasan_report+0xbe/0xf0 [ 47.917258] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.917881] vma_interval_tree_remove+0xc75/0xec0 [ 47.918485] vma_prepare+0xc54/0x11a0 [ 47.918966] __split_vma+0x5af/0x950 [ 47.919435] ? __pfx___split_vma+0x10/0x10 [ 47.919989] ? find_held_lock+0x2c/0x110 [ 47.920516] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.921078] ? lock_is_held_type+0x9f/0x120 [ 47.921613] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.922225] ? mtree_range_walk+0x632/0x900 [ 47.922774] ? mas_walk+0x5c7/0x7c0 [ 47.923251] do_vmi_munmap+0x1f1/0x2b0 [ 47.923749] mmap_region+0x1f9/0x2660 [ 47.924234] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.924749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.925466] ? __pfx_lock_acquire+0x10/0x10 [ 47.925997] ? __pfx_mmap_region+0x10/0x10 [ 47.926527] ? security_mmap_addr+0x7d/0xa0 [ 47.927057] ? get_unmapped_area+0x1f5/0x3f0 [ 47.927619] do_mmap+0x854/0xf00 [ 47.928055] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.928549] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.929110] ksys_mmap_pgoff+0x3af/0x500 [ 47.929623] do_syscall_64+0x3f/0x90 [ 47.930107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.930756] RIP: 0033:0x7f9261076d82 [ 47.931216] 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 [ 47.933375] RSP: 002b:00007ffc8a534448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.934301] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9261076d82 [ 47.935148] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92604b0000 [ 47.936004] RBP: 00007f92604b0000 R08: 0000000000000009 R09: 0000000000001000 [ 47.936858] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559dc9e21ec0 [ 47.937708] R13: 00007ffc8a534460 R14: 00007ffc8a534490 R15: 00007ffc8a5347f0 [ 47.938581] [ 47.938883] [ 47.939098] Allocated by task 219: [ 47.939547] kasan_save_stack+0x22/0x50 [ 47.940058] kasan_set_track+0x25/0x30 [ 47.940552] __kasan_slab_alloc+0x59/0x70 [ 47.941079] kmem_cache_alloc+0x16b/0x370 [ 47.941595] vm_area_dup+0x20/0x160 [ 47.942046] __split_vma+0x170/0x950 [ 47.942512] split_vma+0xc6/0x110 [ 47.942953] mprotect_fixup+0x8d2/0xb30 [ 47.943457] do_mprotect_pkey+0x87e/0xd40 [ 47.943986] __x64_sys_mprotect+0x78/0xc0 [ 47.944508] do_syscall_64+0x3f/0x90 [ 47.944975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.945617] [ 47.945834] Freed by task 219: [ 47.946233] kasan_save_stack+0x22/0x50 [ 47.946733] kasan_set_track+0x25/0x30 [ 47.947227] kasan_save_free_info+0x2b/0x50 [ 47.947762] __kasan_slab_free+0x10a/0x190 [ 47.948302] kmem_cache_free+0x10d/0x4d0 [ 47.948812] rcu_core+0x8c8/0x2860 [ 47.949257] __do_softirq+0x1b7/0x7d4 [ 47.949728] [ 47.949945] Last potentially related work creation: [ 47.950529] kasan_save_stack+0x22/0x50 [ 47.951038] __kasan_record_aux_stack+0x8e/0xa0 [ 47.951631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.952282] remove_vma+0x139/0x170 [ 47.952783] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.953340] do_vmi_munmap+0x1f1/0x2b0 [ 47.953825] __vm_munmap+0x138/0x3a0 [ 47.954295] __x64_sys_munmap+0x59/0x80 [ 47.954793] do_syscall_64+0x3f/0x90 [ 47.955263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.955914] [ 47.956129] The buggy address belongs to the object at ffff888015e779f8 [ 47.956129] which belongs to the cache vm_area_struct of size 168 [ 47.957601] The buggy address is located 88 bytes inside of [ 47.957601] freed 168-byte region [ffff888015e779f8, ffff888015e77aa0) [ 47.959006] [ 47.959222] The buggy address belongs to the physical page: [ 47.959894] page:00000000d946b176 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e77 [ 47.960990] memcg:ffff88800f5bbe01 [ 47.961420] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.962062] page_type: 0xffffffff() [ 47.962552] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.963483] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5bbe01 [ 47.964400] page dumped because: kasan: bad access detected [ 47.965070] [ 47.965291] Memory state around the buggy address: [ 47.965875] ffff888015e77900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.966737] ffff888015e77980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 47.967625] >ffff888015e77a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.968491] ^ [ 47.969194] ffff888015e77a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 47.970060] ffff888015e77b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.970917] ================================================================== [ 47.972081] Disabling lock debugging due to kernel taint [ 50.001832] BUG: Bad rss-counter state mm:000000006cc6016d type:MM_FILEPAGES val:33 [ 50.003003] BUG: Bad rss-counter state mm:000000006cc6016d type:MM_ANONPAGES val:22 [ 50.462904] BUG: Bad rss-counter state mm:00000000f3158359 type:MM_FILEPAGES val:33 [ 50.464106] BUG: Bad rss-counter state mm:00000000f3158359 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27074' (ECDSA) to the list of known hosts. 2023/06/19 16:13:24 fuzzer started 2023/06/19 16:13:24 dialing manager at localhost:44161 2023/06/19 16:13:24 checking machine... 2023/06/19 16:13:24 checking revisions... [ 51.178903] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:13:24 testing simple program... [ 51.235790] cgroup: Unknown subsys name 'net' [ 51.276792] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:13:15 Registers: info registers vcpu 0 RAX=0000000000000070 RBX=ffff888019030280 RCX=00000000000a9a80 RDX=00000000000a9a40 RSI=0000000000000cc0 RDI=00000000000a9a40 RBP=ffff8880158c7870 RSP=ffff8880158c7820 R8 =0000000000042a50 R9 =fffffbfff0ba77da R10=0000000000000000 R11=ffff888019030140 R12=ffff888008fce000 R13=0000000000000000 R14=0000000000000cc0 R15=ffffffff8366cd3c RIP=ffffffff81808200 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 00007fd2d9347900 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=00007ffd15d7e000 CR3=000000000e61e000 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=00007ff11adb29d0 CR3=000000000edda000 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=fccbb4dd15f114885b41ceef598be3ae XMM02=000000000011e840eff9b2d0a8fce9cb XMM03=000000000011e9102c67c8bc2e329bc3 XMM04=2d9f9336f500e00500000000000ae988 XMM05=6860aeb314f8829d00000000001342f0 XMM06=37a78b410273e77200000000001334c8 XMM07=e042d86d42eb936e0000000000124d90 XMM08=94fed09b3b93017b000000000011e910 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000