syzkaller login: [ 31.067648] BUG: Bad rss-counter state mm:000000001eb22f6a type:MM_FILEPAGES val:33 [ 31.068857] BUG: Bad rss-counter state mm:000000001eb22f6a type:MM_ANONPAGES val:22 [ 31.103901] ================================================================== [ 31.104732] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.105504] Read of size 8 at addr ffff888019e58140 by task sshd/221 [ 31.106136] [ 31.106311] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.107020] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.107811] Call Trace: [ 31.108068] [ 31.108301] dump_stack_lvl+0x91/0xf0 [ 31.108698] print_report+0xcc/0x620 [ 31.109093] ? __virt_addr_valid+0x102/0x340 [ 31.109539] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.110037] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.110533] kasan_report+0xbe/0xf0 [ 31.110920] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.111419] vma_interval_tree_remove+0xc75/0xec0 [ 31.111906] vma_prepare+0xc54/0x11a0 [ 31.112289] __split_vma+0x5af/0x950 [ 31.112676] ? __pfx___split_vma+0x10/0x10 [ 31.113116] ? find_held_lock+0x2c/0x110 [ 31.113530] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.113979] ? lock_is_held_type+0x9f/0x120 [ 31.114418] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.114909] ? mtree_range_walk+0x632/0x900 [ 31.115356] ? mas_walk+0x5c7/0x7c0 [ 31.115739] do_vmi_munmap+0x1f1/0x2b0 [ 31.116244] mmap_region+0x1f9/0x2660 [ 31.116634] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.117054] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.117648] ? __pfx_lock_acquire+0x10/0x10 [ 31.118077] ? __pfx_mmap_region+0x10/0x10 [ 31.118519] ? security_mmap_addr+0x7d/0xa0 [ 31.118945] ? get_unmapped_area+0x1f5/0x3f0 [ 31.119390] do_mmap+0x854/0xf00 [ 31.119745] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.120148] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.120605] ksys_mmap_pgoff+0x3af/0x500 [ 31.121020] do_syscall_64+0x3f/0x90 [ 31.121427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121954] RIP: 0033:0x7f929ace5d82 [ 31.122320] 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 [ 31.124049] RSP: 002b:00007ffef7b582c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.124778] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f929ace5d82 [ 31.125479] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f929a11f000 [ 31.126158] RBP: 00007f929a11f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.126859] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbe224fec0 [ 31.127538] R13: 00007ffef7b582e0 R14: 00007ffef7b58310 R15: 00007ffef7b58670 [ 31.128233] [ 31.128469] [ 31.128642] Allocated by task 214: [ 31.128983] kasan_save_stack+0x22/0x50 [ 31.129389] kasan_set_track+0x25/0x30 [ 31.129786] __kasan_slab_alloc+0x59/0x70 [ 31.130211] kmem_cache_alloc+0x16b/0x370 [ 31.130624] vm_area_dup+0x20/0x160 [ 31.130985] __split_vma+0x170/0x950 [ 31.131361] split_vma+0xc6/0x110 [ 31.131708] mprotect_fixup+0x8d2/0xb30 [ 31.132111] do_mprotect_pkey+0x87e/0xd40 [ 31.132528] __x64_sys_mprotect+0x78/0xc0 [ 31.132944] do_syscall_64+0x3f/0x90 [ 31.133344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.133870] [ 31.134044] Freed by task 214: [ 31.134359] kasan_save_stack+0x22/0x50 [ 31.134764] kasan_set_track+0x25/0x30 [ 31.135162] kasan_save_free_info+0x2b/0x50 [ 31.135592] __kasan_slab_free+0x10a/0x190 [ 31.136024] kmem_cache_free+0x10d/0x4d0 [ 31.136434] rcu_core+0x8c8/0x2860 [ 31.136790] __do_softirq+0x1b7/0x7d4 [ 31.137181] [ 31.137355] Last potentially related work creation: [ 31.137827] kasan_save_stack+0x22/0x50 [ 31.138240] __kasan_record_aux_stack+0x8e/0xa0 [ 31.138706] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.139230] remove_vma+0x139/0x170 [ 31.139597] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.140045] do_vmi_munmap+0x1f1/0x2b0 [ 31.140438] __vm_munmap+0x138/0x3a0 [ 31.140816] __x64_sys_munmap+0x59/0x80 [ 31.141226] do_syscall_64+0x3f/0x90 [ 31.141610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.142135] [ 31.142311] Second to last potentially related work creation: [ 31.142866] kasan_save_stack+0x22/0x50 [ 31.143270] __kasan_record_aux_stack+0x8e/0xa0 [ 31.143736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.144256] remove_vma+0x139/0x170 [ 31.144619] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.145073] do_vmi_munmap+0x1f1/0x2b0 [ 31.145476] mmap_region+0x1f9/0x2660 [ 31.145859] do_mmap+0x854/0xf00 [ 31.146207] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.146597] ksys_mmap_pgoff+0x3af/0x500 [ 31.146995] do_syscall_64+0x3f/0x90 [ 31.147378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.147898] [ 31.148072] The buggy address belongs to the object at ffff888019e580e8 [ 31.148072] which belongs to the cache vm_area_struct of size 168 [ 31.149269] The buggy address is located 88 bytes inside of [ 31.149269] freed 168-byte region [ffff888019e580e8, ffff888019e58190) [ 31.150402] [ 31.150576] The buggy address belongs to the physical page: [ 31.151106] page:000000000b8ede41 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e58 [ 31.151988] memcg:ffff888019f40601 [ 31.152338] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.152904] page_type: 0xffffffff() [ 31.153291] raw: 0100000000000200 ffff8880087a0c80 ffffea0000679400 0000000000000005 [ 31.154034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f40601 [ 31.154772] page dumped because: kasan: bad access detected [ 31.155312] [ 31.155485] Memory state around the buggy address: [ 31.155960] ffff888019e58000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.156656] ffff888019e58080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.157358] >ffff888019e58100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.158050] ^ [ 31.158575] ffff888019e58180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.159272] ffff888019e58200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.159954] ================================================================== [ 31.160820] Disabling lock debugging due to kernel taint [ 32.648434] BUG: Bad rss-counter state mm:000000003ca4d7fd type:MM_FILEPAGES val:33 [ 32.648971] BUG: Bad rss-counter state mm:000000003ca4d7fd type:MM_ANONPAGES val:22 [ 33.040224] BUG: Bad rss-counter state mm:0000000062199ec9 type:MM_FILEPAGES val:33 [ 33.041606] BUG: Bad rss-counter state mm:0000000062199ec9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50756' (ECDSA) to the list of known hosts. 2023/06/20 16:36:32 fuzzer started 2023/06/20 16:36:32 dialing manager at localhost:36067 2023/06/20 16:36:32 checking machine... 2023/06/20 16:36:32 checking revisions... [ 33.696661] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:36:32 testing simple program... [ 33.750863] cgroup: Unknown subsys name 'net' [ 33.797792] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:36:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=000055e91aee3fe0 CR3=0000000005482000 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=00007f9aeebf25100000555eaee6b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0100000000010200 RBX=0000000000000000 RCX=ffffea000060cc00 RDX=ffffea000060cc01 RSI=ffff888018332200 RDI=ffff888000000000 RBP=ffffffff818937f2 RSP=ffff88800fc4fd48 R8 =ffffea0000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888018332200 R13=ffff8880087b83c0 R14=ffffffff818937f2 R15=dffffc0000000000 RIP=ffffffff8180c9bb 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 00007f074b8bd900 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=00007ffeada91000 CR3=000000000f34a000 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=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