syzkaller login: [ 75.068975] BUG: Bad rss-counter state mm:00000000c5988075 type:MM_FILEPAGES val:33 [ 75.070158] BUG: Bad rss-counter state mm:00000000c5988075 type:MM_ANONPAGES val:22 [ 75.107671] ================================================================== [ 75.108680] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 75.109625] Read of size 8 at addr ffff88800f09ac20 by task sshd/220 [ 75.110396] [ 75.110613] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 75.111665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 75.112629] Call Trace: [ 75.112950] [ 75.113237] dump_stack_lvl+0x91/0xf0 [ 75.113722] print_report+0xcc/0x620 [ 75.114204] ? __virt_addr_valid+0x102/0x340 [ 75.114762] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.115375] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.115996] kasan_report+0xbe/0xf0 [ 75.116471] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.117094] vma_interval_tree_remove+0xc75/0xec0 [ 75.117703] vma_prepare+0xc54/0x11a0 [ 75.118180] __split_vma+0x5af/0x950 [ 75.118654] ? __pfx___split_vma+0x10/0x10 [ 75.119193] ? find_held_lock+0x2c/0x110 [ 75.119731] do_vmi_align_munmap+0x2ba/0x11f0 [ 75.120294] ? lock_is_held_type+0x9f/0x120 [ 75.120839] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 75.121444] ? mtree_range_walk+0x632/0x900 [ 75.122007] ? mas_walk+0x5c7/0x7c0 [ 75.122485] do_vmi_munmap+0x1f1/0x2b0 [ 75.122976] mmap_region+0x1f9/0x2660 [ 75.123460] ? vm_mmap_pgoff+0x15c/0x3a0 [ 75.123980] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 75.124693] ? __pfx_lock_acquire+0x10/0x10 [ 75.125223] ? __pfx_mmap_region+0x10/0x10 [ 75.125754] ? security_mmap_addr+0x7d/0xa0 [ 75.126301] ? get_unmapped_area+0x1f5/0x3f0 [ 75.126861] do_mmap+0x854/0xf00 [ 75.127298] vm_mmap_pgoff+0x1a6/0x3a0 [ 75.127800] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 75.128373] ksys_mmap_pgoff+0x3af/0x500 [ 75.128883] do_syscall_64+0x3f/0x90 [ 75.129353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.129995] RIP: 0033:0x7f22b7e2ed82 [ 75.130453] 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 [ 75.132584] RSP: 002b:00007ffec7432b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 75.133480] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22b7e2ed82 [ 75.134334] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22b7268000 [ 75.135181] RBP: 00007f22b7268000 R08: 0000000000000009 R09: 0000000000001000 [ 75.136030] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ebcabcec0 [ 75.136882] R13: 00007ffec7432b60 R14: 00007ffec7432b90 R15: 00007ffec7432ef0 [ 75.137738] [ 75.138028] [ 75.138241] Allocated by task 213: [ 75.138669] kasan_save_stack+0x22/0x50 [ 75.139171] kasan_set_track+0x25/0x30 [ 75.139669] __kasan_slab_alloc+0x59/0x70 [ 75.140195] kmem_cache_alloc+0x16b/0x370 [ 75.140710] vm_area_dup+0x20/0x160 [ 75.141172] __split_vma+0x170/0x950 [ 75.141639] split_vma+0xc6/0x110 [ 75.142080] mprotect_fixup+0x8d2/0xb30 [ 75.142583] do_mprotect_pkey+0x87e/0xd40 [ 75.143103] __x64_sys_mprotect+0x78/0xc0 [ 75.143639] do_syscall_64+0x3f/0x90 [ 75.144113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.144754] [ 75.144968] Freed by task 213: [ 75.145361] kasan_save_stack+0x22/0x50 [ 75.145868] kasan_set_track+0x25/0x30 [ 75.146362] kasan_save_free_info+0x2b/0x50 [ 75.146896] __kasan_slab_free+0x10a/0x190 [ 75.147437] kmem_cache_free+0x10d/0x4d0 [ 75.147952] rcu_core+0x8c8/0x2860 [ 75.148399] __do_softirq+0x1b7/0x7d4 [ 75.148875] [ 75.149089] Last potentially related work creation: [ 75.149683] kasan_save_stack+0x22/0x50 [ 75.150187] __kasan_record_aux_stack+0x8e/0xa0 [ 75.150760] __call_rcu_common.constprop.0+0x6a/0xb90 [ 75.151415] remove_vma+0x139/0x170 [ 75.151889] do_vmi_align_munmap+0xd4a/0x11f0 [ 75.152452] do_vmi_munmap+0x1f1/0x2b0 [ 75.152939] __vm_munmap+0x138/0x3a0 [ 75.153403] __x64_sys_munmap+0x59/0x80 [ 75.153897] do_syscall_64+0x3f/0x90 [ 75.154375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.155022] [ 75.155243] The buggy address belongs to the object at ffff88800f09abc8 [ 75.155243] which belongs to the cache vm_area_struct of size 168 [ 75.156720] The buggy address is located 88 bytes inside of [ 75.156720] freed 168-byte region [ffff88800f09abc8, ffff88800f09ac70) [ 75.158146] [ 75.158362] The buggy address belongs to the physical page: [ 75.159028] page:000000000a5c7b08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf09a [ 75.160115] memcg:ffff8880175e3901 [ 75.160541] flags: 0x100000000000200(slab|node=0|zone=1) [ 75.161189] page_type: 0xffffffff() [ 75.161638] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 75.162567] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880175e3901 [ 75.163490] page dumped because: kasan: bad access detected [ 75.164149] [ 75.164363] Memory state around the buggy address: [ 75.164946] ffff88800f09ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 75.165810] ffff88800f09ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 75.166670] >ffff88800f09ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 75.167531] ^ [ 75.168057] ffff88800f09ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 75.168908] ffff88800f09ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 75.169756] ================================================================== [ 75.170792] Disabling lock debugging due to kernel taint [ 77.298222] BUG: Bad rss-counter state mm:000000006abd1932 type:MM_FILEPAGES val:33 [ 77.299356] BUG: Bad rss-counter state mm:000000006abd1932 type:MM_ANONPAGES val:22 [ 77.744419] BUG: Bad rss-counter state mm:000000002a0b0bbe type:MM_FILEPAGES val:33 [ 77.745550] BUG: Bad rss-counter state mm:000000002a0b0bbe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59912' (ECDSA) to the list of known hosts. 2023/06/19 11:25:25 fuzzer started 2023/06/19 11:25:25 dialing manager at localhost:44161 2023/06/19 11:25:25 checking machine... 2023/06/19 11:25:25 checking revisions... [ 78.458575] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:25:25 testing simple program... [ 78.507842] cgroup: Unknown subsys name 'net' [ 78.551420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:24:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f699a9aa898 CR3=000000000c53e000 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=38ddfc94f852f1aa6f463f3e16b8c4b5 XMM02=0000000000126c78eff9b2d0a8fce9cb XMM03=0000000000126d482c67c8bc2e329bc3 XMM04=b90a6ed55d83b9f200000000000ae988 XMM05=c9d6b3d03fc69f86000000000013e520 XMM06=4fda316b135da52b000000000013d310 XMM07=fb795ef6d6577056000000000012d9f8 XMM08=2c67c8bc2e329bc30000000000126ce8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000ffffffff RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880164ab680 RSI=00000000ffffffff RDI=0000000000000000 RBP=ffff88801923c178 RSP=ffff888018157d80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801923c208 R13=ffffffff818cf549 R14=00000000ffffffff R15=ffff88800ef40e00 RIP=ffffffff814c0384 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 00007fe73ac4b900 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=00007fe73b202618 CR3=000000001a292000 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=563412feff00545000000000000080fe 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