syzkaller login: [ 45.048973] sshd (221) used greatest stack depth: 23992 bytes left [ 45.050233] BUG: Bad rss-counter state mm:000000000ea78a76 type:MM_FILEPAGES val:33 [ 45.051066] BUG: Bad rss-counter state mm:000000000ea78a76 type:MM_ANONPAGES val:22 [ 45.198240] ================================================================== [ 45.199274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.200341] Read of size 8 at addr ffff8880142c15c8 by task sshd/228 [ 45.201367] [ 45.201616] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.202610] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.203731] Call Trace: [ 45.204095] [ 45.204421] dump_stack_lvl+0x91/0xf0 [ 45.205016] print_report+0xcc/0x620 [ 45.205573] ? __virt_addr_valid+0x102/0x340 [ 45.206209] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.206922] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.207633] kasan_report+0xbe/0xf0 [ 45.208231] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.208979] vma_interval_tree_remove+0xc75/0xec0 [ 45.209671] vma_prepare+0xc54/0x11a0 [ 45.210183] __split_vma+0x5af/0x950 [ 45.210655] ? __pfx___split_vma+0x10/0x10 [ 45.211185] ? find_held_lock+0x2c/0x110 [ 45.211698] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.212266] ? lock_is_held_type+0x9f/0x120 [ 45.212823] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.213437] ? mtree_range_walk+0x632/0x900 [ 45.213993] ? mas_walk+0x5c7/0x7c0 [ 45.214471] do_vmi_munmap+0x1f1/0x2b0 [ 45.214961] mmap_region+0x1f9/0x2660 [ 45.215442] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.215959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.216674] ? __pfx_lock_acquire+0x10/0x10 [ 45.217238] ? __pfx_mmap_region+0x10/0x10 [ 45.217771] ? security_mmap_addr+0x7d/0xa0 [ 45.218301] ? get_unmapped_area+0x1f5/0x3f0 [ 45.218855] do_mmap+0x854/0xf00 [ 45.219296] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.219795] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.220359] ksys_mmap_pgoff+0x3af/0x500 [ 45.220879] do_syscall_64+0x3f/0x90 [ 45.221363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.222013] RIP: 0033:0x7f6522ad9d82 [ 45.222470] 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 [ 45.224585] RSP: 002b:00007fffaadda4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.225506] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6522ad9d82 [ 45.226365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6521f13000 [ 45.227232] RBP: 00007f6521f13000 R08: 0000000000000009 R09: 0000000000001000 [ 45.228094] R10: 0000000000000812 R11: 0000000000000206 R12: 000055afc7355ec0 [ 45.228960] R13: 00007fffaadda4c0 R14: 00007fffaadda4f0 R15: 00007fffaadda850 [ 45.229826] [ 45.230118] [ 45.230330] Allocated by task 221: [ 45.230761] kasan_save_stack+0x22/0x50 [ 45.231262] kasan_set_track+0x25/0x30 [ 45.231759] __kasan_slab_alloc+0x59/0x70 [ 45.232283] kmem_cache_alloc+0x16b/0x370 [ 45.232805] vm_area_dup+0x20/0x160 [ 45.233263] __split_vma+0x170/0x950 [ 45.233731] split_vma+0xc6/0x110 [ 45.234170] mprotect_fixup+0x8d2/0xb30 [ 45.234666] do_mprotect_pkey+0x87e/0xd40 [ 45.235187] __x64_sys_mprotect+0x78/0xc0 [ 45.235708] do_syscall_64+0x3f/0x90 [ 45.236185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.236840] [ 45.237061] Freed by task 221: [ 45.237453] kasan_save_stack+0x22/0x50 [ 45.237957] kasan_set_track+0x25/0x30 [ 45.238457] kasan_save_free_info+0x2b/0x50 [ 45.238987] __kasan_slab_free+0x10a/0x190 [ 45.239525] kmem_cache_free+0x10d/0x4d0 [ 45.240040] rcu_core+0x8c8/0x2860 [ 45.240479] __do_softirq+0x1b7/0x7d4 [ 45.240986] [ 45.241203] Last potentially related work creation: [ 45.241786] kasan_save_stack+0x22/0x50 [ 45.242286] __kasan_record_aux_stack+0x8e/0xa0 [ 45.242862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.243516] remove_vma+0x139/0x170 [ 45.243972] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.244528] do_vmi_munmap+0x1f1/0x2b0 [ 45.245022] __vm_munmap+0x138/0x3a0 [ 45.245489] __x64_sys_munmap+0x59/0x80 [ 45.245991] do_syscall_64+0x3f/0x90 [ 45.246466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.247114] [ 45.247330] The buggy address belongs to the object at ffff8880142c1570 [ 45.247330] which belongs to the cache vm_area_struct of size 168 [ 45.248819] The buggy address is located 88 bytes inside of [ 45.248819] freed 168-byte region [ffff8880142c1570, ffff8880142c1618) [ 45.250242] [ 45.250461] The buggy address belongs to the physical page: [ 45.251131] page:000000002b570204 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x142c1 [ 45.252222] memcg:ffff888016b52301 [ 45.252649] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.253311] page_type: 0xffffffff() [ 45.253762] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.254680] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b52301 [ 45.255590] page dumped because: kasan: bad access detected [ 45.256258] [ 45.256477] Memory state around the buggy address: [ 45.257066] ffff8880142c1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.257924] ffff8880142c1500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 45.258783] >ffff8880142c1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.259635] ^ [ 45.260298] ffff8880142c1600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 45.261160] ffff8880142c1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.262011] ================================================================== [ 45.262985] Disabling lock debugging due to kernel taint [ 46.913079] BUG: Bad rss-counter state mm:00000000dda754e6 type:MM_FILEPAGES val:33 [ 46.913637] BUG: Bad rss-counter state mm:00000000dda754e6 type:MM_ANONPAGES val:22 [ 47.306346] BUG: Bad rss-counter state mm:00000000263bb01e type:MM_FILEPAGES val:33 [ 47.307103] BUG: Bad rss-counter state mm:00000000263bb01e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56389' (ECDSA) to the list of known hosts. 2023/06/20 01:12:20 fuzzer started 2023/06/20 01:12:20 dialing manager at localhost:44161 2023/06/20 01:12:20 checking machine... 2023/06/20 01:12:20 checking revisions... [ 47.935083] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:12:21 testing simple program... [ 47.987922] cgroup: Unknown subsys name 'net' [ 48.039062] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:12:14 Registers: info registers vcpu 0 RAX=1ffffffff0bb783c RBX=ffffffff85dbc1e4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1cc RSP=ffff88806ce099e0 R8 =ffffffff860d68c0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1cc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f2f6bf7f900 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=00007f2f6c536618 CR3=000000000c584000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f518cc24f40 CR3=000000000ed2c000 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=2b3fed585a45faadc4435df5c64a82fb XMM02=2c67c8bc2e329bc3000000000011dfa8 XMM03=fb795ef6d657705600000000001241b0 XMM04=8525acab481c0ac600000000000ae988 XMM05=1a58cb52dc18f6d70000000000133c38 XMM06=0f613d67b489e90a0000000000132e10 XMM07=e042d86d42eb936e0000000000124430 XMM08=75d2ecf79b9e470e000000000011e008 XMM09=00000000000000000000000000000000 XMM10=20000000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000