syzkaller login: [ 35.585248] BUG: Bad rss-counter state mm:000000008bf07c0b type:MM_FILEPAGES val:33 [ 35.586454] BUG: Bad rss-counter state mm:000000008bf07c0b type:MM_ANONPAGES val:22 [ 35.749114] ================================================================== [ 35.750027] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.750970] Read of size 8 at addr ffff888016b273f8 by task sshd/219 [ 35.751757] [ 35.751983] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.752982] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.754000] Call Trace: [ 35.754352] [ 35.754647] dump_stack_lvl+0x91/0xf0 [ 35.755144] print_report+0xcc/0x620 [ 35.755625] ? __virt_addr_valid+0x102/0x340 [ 35.756185] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.756793] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.757421] kasan_report+0xbe/0xf0 [ 35.757897] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.758526] vma_interval_tree_remove+0xc75/0xec0 [ 35.759137] vma_prepare+0xc54/0x11a0 [ 35.759617] __split_vma+0x5af/0x950 [ 35.760090] ? __pfx___split_vma+0x10/0x10 [ 35.760618] ? find_held_lock+0x2c/0x110 [ 35.761150] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.761724] ? lock_is_held_type+0x9f/0x120 [ 35.762260] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.762869] ? mtree_range_walk+0x632/0x900 [ 35.763423] ? mas_walk+0x5c7/0x7c0 [ 35.763900] do_vmi_munmap+0x1f1/0x2b0 [ 35.764399] mmap_region+0x1f9/0x2660 [ 35.764879] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.765412] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.766130] ? __pfx_lock_acquire+0x10/0x10 [ 35.766666] ? __pfx_mmap_region+0x10/0x10 [ 35.767198] ? security_mmap_addr+0x7d/0xa0 [ 35.767737] ? get_unmapped_area+0x1f5/0x3f0 [ 35.768288] do_mmap+0x854/0xf00 [ 35.768732] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.769248] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.769814] ksys_mmap_pgoff+0x3af/0x500 [ 35.770327] do_syscall_64+0x3f/0x90 [ 35.770807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.771456] RIP: 0033:0x7f0e33daad82 [ 35.771912] 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 [ 35.774068] RSP: 002b:00007ffc42e65ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.774969] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e33daad82 [ 35.775833] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e331e4000 [ 35.776685] RBP: 00007f0e331e4000 R08: 0000000000000009 R09: 0000000000001000 [ 35.777538] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aab7668ec0 [ 35.778383] R13: 00007ffc42e66010 R14: 00007ffc42e66040 R15: 00007ffc42e663a0 [ 35.779240] [ 35.779540] [ 35.779756] Allocated by task 212: [ 35.780185] kasan_save_stack+0x22/0x50 [ 35.780689] kasan_set_track+0x25/0x30 [ 35.781193] __kasan_slab_alloc+0x59/0x70 [ 35.781724] kmem_cache_alloc+0x16b/0x370 [ 35.782241] vm_area_dup+0x20/0x160 [ 35.782698] __split_vma+0x170/0x950 [ 35.783162] split_vma+0xc6/0x110 [ 35.783603] mprotect_fixup+0x8d2/0xb30 [ 35.784103] do_mprotect_pkey+0x87e/0xd40 [ 35.784623] __x64_sys_mprotect+0x78/0xc0 [ 35.785162] do_syscall_64+0x3f/0x90 [ 35.785634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.786273] [ 35.786493] Freed by task 212: [ 35.786891] kasan_save_stack+0x22/0x50 [ 35.787389] kasan_set_track+0x25/0x30 [ 35.787887] kasan_save_free_info+0x2b/0x50 [ 35.788416] __kasan_slab_free+0x10a/0x190 [ 35.788953] kmem_cache_free+0x10d/0x4d0 [ 35.789466] rcu_core+0x8c8/0x2860 [ 35.789915] __do_softirq+0x1b7/0x7d4 [ 35.790392] [ 35.790612] Last potentially related work creation: [ 35.791199] kasan_save_stack+0x22/0x50 [ 35.791707] __kasan_record_aux_stack+0x8e/0xa0 [ 35.792277] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.792922] remove_vma+0x139/0x170 [ 35.793383] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.793951] do_vmi_munmap+0x1f1/0x2b0 [ 35.794437] __vm_munmap+0x138/0x3a0 [ 35.794906] __x64_sys_munmap+0x59/0x80 [ 35.795406] do_syscall_64+0x3f/0x90 [ 35.795879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.796517] [ 35.796733] The buggy address belongs to the object at ffff888016b273a0 [ 35.796733] which belongs to the cache vm_area_struct of size 168 [ 35.798229] The buggy address is located 88 bytes inside of [ 35.798229] freed 168-byte region [ffff888016b273a0, ffff888016b27448) [ 35.799636] [ 35.799853] The buggy address belongs to the physical page: [ 35.800511] page:000000004820a74f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b27 [ 35.801613] memcg:ffff88800f0e8001 [ 35.802040] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.802681] page_type: 0xffffffff() [ 35.803128] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.804048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0e8001 [ 35.804960] page dumped because: kasan: bad access detected [ 35.805645] [ 35.805862] Memory state around the buggy address: [ 35.806444] ffff888016b27280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.807302] ffff888016b27300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.808154] >ffff888016b27380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.809003] ^ [ 35.809860] ffff888016b27400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.810716] ffff888016b27480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.811563] ================================================================== [ 35.812618] Disabling lock debugging due to kernel taint [ 37.798853] BUG: Bad rss-counter state mm:0000000056d3471c type:MM_FILEPAGES val:33 [ 37.799670] BUG: Bad rss-counter state mm:0000000056d3471c type:MM_ANONPAGES val:22 [ 38.328457] BUG: Bad rss-counter state mm:00000000179d560f type:MM_FILEPAGES val:33 [ 38.329654] BUG: Bad rss-counter state mm:00000000179d560f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37924' (ECDSA) to the list of known hosts. 2023/06/19 11:03:00 fuzzer started 2023/06/19 11:03:00 dialing manager at localhost:44161 2023/06/19 11:03:00 checking machine... 2023/06/19 11:03:00 checking revisions... [ 38.996990] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:03:00 testing simple program... [ 39.049943] cgroup: Unknown subsys name 'net' [ 39.101200] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:02:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce3a2c0 RCX=ffffffff81377f7f RDX=fffffbfff0ba77db RSI=0000000000000000 RDI=ffff88806ce3a360 RBP=0000000000000200 RSP=ffff888008d7fd38 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9c7479 R12=0000000000000000 R13=ffff888008d7fdc8 R14=0000000000000200 R15=ffff88806ce3a360 RIP=ffffffff8137fd22 RFL=00000046 [---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 0000000000000000 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=00007f6236f25650 CR3=000000000cb0e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09a98 RCX=0000000000000002 RDX=ffff88806cf09a01 RSI=ffff88806cf09a68 RDI=ffff88806cf09aa8 RBP=ffff88806cf09a68 RSP=ffff88806cf099a0 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09a68 R15=ffff88806cf09a98 RIP=ffffffff811304c9 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f440860a900 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=00007f4407b2a000 CR3=000000000ca3a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=80327f20fdfef48500000000000ae988 XMM05=ce25ddb5430d17ab0000000000134ec8 XMM06=806171799158d9670000000000133948 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000