syzkaller login: [ 29.989030] BUG: Bad rss-counter state mm:00000000900f4ae0 type:MM_FILEPAGES val:33 [ 29.990823] BUG: Bad rss-counter state mm:00000000900f4ae0 type:MM_ANONPAGES val:22 [ 30.161009] ================================================================== [ 30.161981] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.162915] Read of size 8 at addr ffff888019e186b0 by task sshd/219 [ 30.163684] [ 30.164057] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.164954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.165982] Call Trace: [ 30.166346] [ 30.166639] dump_stack_lvl+0x91/0xf0 [ 30.167142] print_report+0xcc/0x620 [ 30.167643] ? __virt_addr_valid+0x102/0x340 [ 30.168214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.168855] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.169494] kasan_report+0xbe/0xf0 [ 30.170000] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.170645] vma_interval_tree_remove+0xc75/0xec0 [ 30.171269] vma_prepare+0xc54/0x11a0 [ 30.171767] __split_vma+0x5af/0x950 [ 30.172263] ? __pfx___split_vma+0x10/0x10 [ 30.172805] ? find_held_lock+0x2c/0x110 [ 30.173325] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.173904] ? lock_is_held_type+0x9f/0x120 [ 30.174442] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.175053] ? mtree_range_walk+0x632/0x900 [ 30.175606] ? mas_walk+0x5c7/0x7c0 [ 30.176086] do_vmi_munmap+0x1f1/0x2b0 [ 30.176611] mmap_region+0x1f9/0x2660 [ 30.177115] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.177666] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.178498] ? __pfx_lock_acquire+0x10/0x10 [ 30.179082] ? __pfx_mmap_region+0x10/0x10 [ 30.179673] ? security_mmap_addr+0x7d/0xa0 [ 30.180237] ? get_unmapped_area+0x1f5/0x3f0 [ 30.180824] do_mmap+0x854/0xf00 [ 30.181278] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.181807] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.182403] ksys_mmap_pgoff+0x3af/0x500 [ 30.182944] do_syscall_64+0x3f/0x90 [ 30.183451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.184131] RIP: 0033:0x7fc00e6a3d82 [ 30.184598] 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 [ 30.186785] RSP: 002b:00007ffe4bc0ad18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.187696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc00e6a3d82 [ 30.188552] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc00dadd000 [ 30.189404] RBP: 00007fc00dadd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.190285] R10: 0000000000000812 R11: 0000000000000206 R12: 000055816786fec0 [ 30.191155] R13: 00007ffe4bc0ad30 R14: 00007ffe4bc0ad60 R15: 00007ffe4bc0b0c0 [ 30.192010] [ 30.192304] [ 30.192519] Allocated by task 212: [ 30.192959] kasan_save_stack+0x22/0x50 [ 30.193493] kasan_set_track+0x25/0x30 [ 30.193998] __kasan_slab_alloc+0x59/0x70 [ 30.194527] kmem_cache_alloc+0x16b/0x370 [ 30.195049] vm_area_dup+0x20/0x160 [ 30.195501] __split_vma+0x170/0x950 [ 30.195966] split_vma+0xc6/0x110 [ 30.196405] mprotect_fixup+0x8d2/0xb30 [ 30.196916] do_mprotect_pkey+0x87e/0xd40 [ 30.197440] __x64_sys_mprotect+0x78/0xc0 [ 30.197968] do_syscall_64+0x3f/0x90 [ 30.198447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.199090] [ 30.199305] Freed by task 13: [ 30.199692] kasan_save_stack+0x22/0x50 [ 30.200198] kasan_set_track+0x25/0x30 [ 30.200689] kasan_save_free_info+0x2b/0x50 [ 30.201226] __kasan_slab_free+0x10a/0x190 [ 30.201782] kmem_cache_free+0x10d/0x4d0 [ 30.202296] rcu_core+0x8c8/0x2860 [ 30.202758] __do_softirq+0x1b7/0x7d4 [ 30.203243] [ 30.203463] Last potentially related work creation: [ 30.204047] kasan_save_stack+0x22/0x50 [ 30.204556] __kasan_record_aux_stack+0x8e/0xa0 [ 30.205130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.205898] remove_vma+0x139/0x170 [ 30.206349] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.206915] do_vmi_munmap+0x1f1/0x2b0 [ 30.207406] __vm_munmap+0x138/0x3a0 [ 30.207872] __x64_sys_munmap+0x59/0x80 [ 30.208367] do_syscall_64+0x3f/0x90 [ 30.208843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.209483] [ 30.209704] The buggy address belongs to the object at ffff888019e18658 [ 30.209704] which belongs to the cache vm_area_struct of size 168 [ 30.211210] The buggy address is located 88 bytes inside of [ 30.211210] freed 168-byte region [ffff888019e18658, ffff888019e18700) [ 30.212613] [ 30.212827] The buggy address belongs to the physical page: [ 30.213488] page:00000000cabf2f6d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e18 [ 30.214592] memcg:ffff888019e1cb01 [ 30.215018] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.215717] page_type: 0xffffffff() [ 30.216173] raw: 0100000000000200 ffff88800879fc80 ffffea0000270840 0000000000000003 [ 30.217107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e1cb01 [ 30.218022] page dumped because: kasan: bad access detected [ 30.218685] [ 30.218898] Memory state around the buggy address: [ 30.219488] ffff888019e18580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.220350] ffff888019e18600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.221211] >ffff888019e18680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.222078] ^ [ 30.222667] ffff888019e18700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.223562] ffff888019e18780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.224446] ================================================================== [ 30.225453] Disabling lock debugging due to kernel taint [ 32.661994] BUG: Bad rss-counter state mm:00000000d966446b type:MM_FILEPAGES val:33 [ 32.663014] BUG: Bad rss-counter state mm:00000000d966446b type:MM_ANONPAGES val:22 [ 33.216646] BUG: Bad rss-counter state mm:00000000306dbfe8 type:MM_FILEPAGES val:33 [ 33.217800] BUG: Bad rss-counter state mm:00000000306dbfe8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39430' (ECDSA) to the list of known hosts. 2023/06/20 03:27:12 fuzzer started 2023/06/20 03:27:12 dialing manager at localhost:44161 2023/06/20 03:27:12 checking machine... 2023/06/20 03:27:12 checking revisions... [ 33.844974] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:27:12 testing simple program... [ 33.896420] cgroup: Unknown subsys name 'net' [ 33.967088] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:27:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b1c7e RDX=ffff88801a19fac8 RSI=1ffff11003433f5b RDI=1ffff11003433f5b RBP=ffff88801a19fad8 RSP=ffff88801a19fa10 R8 =ffffffff863b1c82 R9 =ffff88801a19fac0 R10=0000000000038001 R11=000000000008a96b R12=ffff88801a19fae0 R13=ffff88801a19fac8 R14=ffff88801a19ff20 R15=ffff88801a19fa80 RIP=ffffffff811310a7 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 00007f461a13a900 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=00007f461a6f20b0 CR3=000000000eba0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f4b14ca2028 CR3=000000000efd4000 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=995681f32f908c86ee4abb189633c89c XMM02=2c67c8bc2e329bc3000000000011eb40 XMM03=fb795ef6d657705600000000001236a8 XMM04=86c6d543939d6b6000000000000ae988 XMM05=19e9129bd510f2350000000000133208 XMM06=f66b709e7a9aba5d0000000000131908 XMM07=e042d86d42eb936e0000000000123928 XMM08=d6ba642a4bcc4834000000000011eba0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000