syzkaller login: [ 33.570506] BUG: Bad rss-counter state mm:00000000f3de3105 type:MM_FILEPAGES val:33 [ 33.572240] BUG: Bad rss-counter state mm:00000000f3de3105 type:MM_ANONPAGES val:22 [ 33.750446] ================================================================== [ 33.751385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.752337] Read of size 8 at addr ffff888018310b38 by task sshd/220 [ 33.753233] [ 33.753452] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.754334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.755618] Call Trace: [ 33.756036] [ 33.756445] dump_stack_lvl+0x91/0xf0 [ 33.757083] print_report+0xcc/0x620 [ 33.757747] ? __virt_addr_valid+0x102/0x340 [ 33.758476] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.759302] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.760089] kasan_report+0xbe/0xf0 [ 33.760743] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.761586] vma_interval_tree_remove+0xc75/0xec0 [ 33.762395] vma_prepare+0xc54/0x11a0 [ 33.763027] __split_vma+0x5af/0x950 [ 33.763666] ? __pfx___split_vma+0x10/0x10 [ 33.764378] ? find_held_lock+0x2c/0x110 [ 33.765085] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.765754] ? lock_is_held_type+0x9f/0x120 [ 33.766406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.767121] ? mtree_range_walk+0x632/0x900 [ 33.767778] ? mas_walk+0x5c7/0x7c0 [ 33.768343] do_vmi_munmap+0x1f1/0x2b0 [ 33.768930] mmap_region+0x1f9/0x2660 [ 33.769523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.770123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.770962] ? __pfx_lock_acquire+0x10/0x10 [ 33.771600] ? __pfx_mmap_region+0x10/0x10 [ 33.772236] ? security_mmap_addr+0x7d/0xa0 [ 33.772868] ? get_unmapped_area+0x1f5/0x3f0 [ 33.773531] do_mmap+0x854/0xf00 [ 33.774038] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.774622] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.775293] ksys_mmap_pgoff+0x3af/0x500 [ 33.775882] do_syscall_64+0x3f/0x90 [ 33.776483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.777263] RIP: 0033:0x7f6e32d49d82 [ 33.777788] 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 [ 33.780314] RSP: 002b:00007ffea9ca5f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.781412] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e32d49d82 [ 33.782404] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e32183000 [ 33.783397] RBP: 00007f6e32183000 R08: 0000000000000009 R09: 0000000000001000 [ 33.784422] R10: 0000000000000812 R11: 0000000000000206 R12: 000056411f488ec0 [ 33.785437] R13: 00007ffea9ca5f90 R14: 00007ffea9ca5fc0 R15: 00007ffea9ca6320 [ 33.786439] [ 33.786781] [ 33.787024] Allocated by task 213: [ 33.787532] kasan_save_stack+0x22/0x50 [ 33.788123] kasan_set_track+0x25/0x30 [ 33.788715] __kasan_slab_alloc+0x59/0x70 [ 33.789337] kmem_cache_alloc+0x16b/0x370 [ 33.789925] vm_area_dup+0x20/0x160 [ 33.790455] __split_vma+0x170/0x950 [ 33.790994] split_vma+0xc6/0x110 [ 33.791512] mprotect_fixup+0x8d2/0xb30 [ 33.792094] do_mprotect_pkey+0x87e/0xd40 [ 33.792707] __x64_sys_mprotect+0x78/0xc0 [ 33.793327] do_syscall_64+0x3f/0x90 [ 33.793874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.794617] [ 33.794865] Freed by task 213: [ 33.795326] kasan_save_stack+0x22/0x50 [ 33.795900] kasan_set_track+0x25/0x30 [ 33.796502] kasan_save_free_info+0x2b/0x50 [ 33.797116] __kasan_slab_free+0x10a/0x190 [ 33.797741] kmem_cache_free+0x10d/0x4d0 [ 33.798328] rcu_core+0x8c8/0x2860 [ 33.798828] __do_softirq+0x1b7/0x7d4 [ 33.799380] [ 33.799622] Last potentially related work creation: [ 33.800294] kasan_save_stack+0x22/0x50 [ 33.800891] __kasan_record_aux_stack+0x8e/0xa0 [ 33.801569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.802313] remove_vma+0x139/0x170 [ 33.802823] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.803477] do_vmi_munmap+0x1f1/0x2b0 [ 33.804029] __vm_munmap+0x138/0x3a0 [ 33.804601] __x64_sys_munmap+0x59/0x80 [ 33.805175] do_syscall_64+0x3f/0x90 [ 33.805731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.806473] [ 33.806710] The buggy address belongs to the object at ffff888018310ae0 [ 33.806710] which belongs to the cache vm_area_struct of size 168 [ 33.808739] The buggy address is located 88 bytes inside of [ 33.808739] freed 168-byte region [ffff888018310ae0, ffff888018310b88) [ 33.810720] [ 33.810966] The buggy address belongs to the physical page: [ 33.811756] page:00000000522e474a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18310 [ 33.813016] memcg:ffff88800969dc01 [ 33.813508] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.814252] page_type: 0xffffffff() [ 33.814762] raw: 0100000000000200 ffff88800879fc80 ffffea000032d2c0 dead000000000002 [ 33.815810] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800969dc01 [ 33.816858] page dumped because: kasan: bad access detected [ 33.817615] [ 33.817853] Memory state around the buggy address: [ 33.818522] ffff888018310a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.819490] ffff888018310a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.820478] >ffff888018310b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.821430] ^ [ 33.822111] ffff888018310b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 33.823087] ffff888018310c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.824045] ================================================================== [ 33.825288] Disabling lock debugging due to kernel taint [ 36.333471] BUG: Bad rss-counter state mm:0000000071a31e3e type:MM_FILEPAGES val:33 [ 36.334467] BUG: Bad rss-counter state mm:0000000071a31e3e type:MM_ANONPAGES val:22 [ 36.870303] BUG: Bad rss-counter state mm:0000000032274cb9 type:MM_FILEPAGES val:33 [ 36.871447] BUG: Bad rss-counter state mm:0000000032274cb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39177' (ECDSA) to the list of known hosts. 2023/06/20 08:42:35 fuzzer started 2023/06/20 08:42:35 dialing manager at localhost:44161 2023/06/20 08:42:35 checking machine... 2023/06/20 08:42:35 checking revisions... [ 37.527530] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:42:35 testing simple program... [ 37.580719] cgroup: Unknown subsys name 'net' [ 37.618785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:42:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019344100 RCX=ffff888019344100 RDX=ffff888019344140 RSI=0000000000000000 RDI=ffff888019344100 RBP=0000000000000040 RSP=ffff8880143175e8 R8 =ffff888019344100 R9 =000000000003d2c0 R10=0000000000000031 R11=00000000000b6996 R12=ffff888019344100 R13=0000000000400cd0 R14=ffff88800dac0a80 R15=0000000000000000 RIP=ffffffff8180fee8 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 00007fea9c755900 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=00007fea9bb4ce58 CR3=000000000eebe000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fa0aecd932891d9300000000000ae988 XMM05=4411619e53ade8ea0000000000134a78 XMM06=19e9129bd510f2350000000000133910 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c522 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=ffff88806cf09ae0 RSI=1ffff1100d9e135e RDI=1ffff1100d9e135e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860d68fa R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff8880180afae0 R15=ffff88806cf09a98 RIP=ffffffff81131099 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 00007f4d139c5900 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=00007fff01e0e000 CR3=000000000f09a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000