syzkaller login: [ 31.000042] BUG: Bad rss-counter state mm:00000000db86d74f type:MM_FILEPAGES val:33 [ 31.002123] BUG: Bad rss-counter state mm:00000000db86d74f type:MM_ANONPAGES val:22 [ 31.175598] ================================================================== [ 31.176590] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.177651] Read of size 8 at addr ffff88800d842df0 by task sshd/220 [ 31.178510] [ 31.178837] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.179817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.180900] Call Trace: [ 31.181256] [ 31.181568] dump_stack_lvl+0x91/0xf0 [ 31.182118] print_report+0xcc/0x620 [ 31.182652] ? __virt_addr_valid+0x102/0x340 [ 31.183264] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183952] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.184631] kasan_report+0xbe/0xf0 [ 31.185155] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185932] vma_interval_tree_remove+0xc75/0xec0 [ 31.186818] vma_prepare+0xc54/0x11a0 [ 31.187394] __split_vma+0x5af/0x950 [ 31.187925] ? __pfx___split_vma+0x10/0x10 [ 31.188514] ? find_held_lock+0x2c/0x110 [ 31.189092] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.189717] ? lock_is_held_type+0x9f/0x120 [ 31.190438] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.191133] ? mtree_range_walk+0x632/0x900 [ 31.191777] ? mas_walk+0x5c7/0x7c0 [ 31.192323] do_vmi_munmap+0x1f1/0x2b0 [ 31.192885] mmap_region+0x1f9/0x2660 [ 31.193439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.194016] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.194847] ? __pfx_lock_acquire+0x10/0x10 [ 31.195430] ? __pfx_mmap_region+0x10/0x10 [ 31.196002] ? security_mmap_addr+0x7d/0xa0 [ 31.196567] ? get_unmapped_area+0x1f5/0x3f0 [ 31.197147] do_mmap+0x854/0xf00 [ 31.197611] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.198141] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.198741] ksys_mmap_pgoff+0x3af/0x500 [ 31.199293] do_syscall_64+0x3f/0x90 [ 31.199804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200498] RIP: 0033:0x7f7607306d82 [ 31.200989] 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 [ 31.203370] RSP: 002b:00007ffc967e4f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.204372] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7607306d82 [ 31.205327] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7606740000 [ 31.206264] RBP: 00007f7606740000 R08: 0000000000000009 R09: 0000000000001000 [ 31.207208] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc049d7f70 [ 31.208161] R13: 00007ffc967e4f20 R14: 00007ffc967e4f50 R15: 00007ffc967e52b0 [ 31.209115] [ 31.209440] [ 31.209678] Allocated by task 213: [ 31.210156] kasan_save_stack+0x22/0x50 [ 31.210719] kasan_set_track+0x25/0x30 [ 31.211269] __kasan_slab_alloc+0x59/0x70 [ 31.211849] kmem_cache_alloc+0x16b/0x370 [ 31.212421] vm_area_dup+0x20/0x160 [ 31.212924] __split_vma+0x170/0x950 [ 31.213435] split_vma+0xc6/0x110 [ 31.213930] mprotect_fixup+0x8d2/0xb30 [ 31.214482] do_mprotect_pkey+0x87e/0xd40 [ 31.215060] __x64_sys_mprotect+0x78/0xc0 [ 31.215658] do_syscall_64+0x3f/0x90 [ 31.216185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216896] [ 31.217135] Freed by task 213: [ 31.217566] kasan_save_stack+0x22/0x50 [ 31.218129] kasan_set_track+0x25/0x30 [ 31.218676] kasan_save_free_info+0x2b/0x50 [ 31.219280] __kasan_slab_free+0x10a/0x190 [ 31.219873] kmem_cache_free+0x10d/0x4d0 [ 31.220431] rcu_core+0x8c8/0x2860 [ 31.220921] __do_softirq+0x1b7/0x7d4 [ 31.221447] [ 31.221687] Last potentially related work creation: [ 31.222341] kasan_save_stack+0x22/0x50 [ 31.222899] __kasan_record_aux_stack+0x8e/0xa0 [ 31.223547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.224257] remove_vma+0x139/0x170 [ 31.224754] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.225368] do_vmi_munmap+0x1f1/0x2b0 [ 31.225906] __vm_munmap+0x138/0x3a0 [ 31.226425] __x64_sys_munmap+0x59/0x80 [ 31.226979] do_syscall_64+0x3f/0x90 [ 31.227553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.228267] [ 31.228503] Second to last potentially related work creation: [ 31.229261] kasan_save_stack+0x22/0x50 [ 31.229820] __kasan_record_aux_stack+0x8e/0xa0 [ 31.230463] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.231178] remove_vma+0x139/0x170 [ 31.231676] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.232273] do_vmi_munmap+0x1f1/0x2b0 [ 31.232826] mmap_region+0x1f9/0x2660 [ 31.233352] do_mmap+0x854/0xf00 [ 31.233828] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.234370] ksys_mmap_pgoff+0x3af/0x500 [ 31.234926] do_syscall_64+0x3f/0x90 [ 31.235475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.236185] [ 31.236426] The buggy address belongs to the object at ffff88800d842d98 [ 31.236426] which belongs to the cache vm_area_struct of size 168 [ 31.238069] The buggy address is located 88 bytes inside of [ 31.238069] freed 168-byte region [ffff88800d842d98, ffff88800d842e40) [ 31.239646] [ 31.239886] The buggy address belongs to the physical page: [ 31.240618] page:0000000084303a42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd842 [ 31.241828] memcg:ffff88800e35a801 [ 31.242303] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.243074] page_type: 0xffffffff() [ 31.243584] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b1440 dead000000000005 [ 31.244606] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e35a801 [ 31.245607] page dumped because: kasan: bad access detected [ 31.246345] [ 31.246585] Memory state around the buggy address: [ 31.247231] ffff88800d842c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.248201] ffff88800d842d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.249153] >ffff88800d842d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.250100] ^ [ 31.250998] ffff88800d842e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.251963] ffff88800d842e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.252904] ================================================================== [ 31.254226] Disabling lock debugging due to kernel taint [ 33.440679] BUG: Bad rss-counter state mm:0000000030955ba5 type:MM_FILEPAGES val:33 [ 33.442006] BUG: Bad rss-counter state mm:0000000030955ba5 type:MM_ANONPAGES val:22 [ 33.983907] BUG: Bad rss-counter state mm:000000005b362a4e type:MM_FILEPAGES val:33 [ 33.985087] BUG: Bad rss-counter state mm:000000005b362a4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31493' (ECDSA) to the list of known hosts. 2023/06/20 16:11:25 fuzzer started 2023/06/20 16:11:25 dialing manager at localhost:36067 2023/06/20 16:11:25 checking machine... 2023/06/20 16:11:25 checking revisions... [ 34.589681] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:11:25 testing simple program... [ 34.638230] cgroup: Unknown subsys name 'net' [ 34.703521] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:11:25 Registers: info registers vcpu 0 RAX=ffffffff81131c58 RBX=ffffffff813ad470 RCX=ffffffff864bce01 RDX=1ffff1100d9c135e RSI=ffffffff81131c58 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff864bce30 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880146a0000 R15=ffff888019ad2678 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007ff3fc2dd900 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=00007fe4f600f650 CR3=000000000ca58000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8a9b4ed6ee95042a00000000000ae988 XMM05=ade90e52a5618efe0000000000133b30 XMM06=4fda316b135da52b0000000000132920 XMM07=fb795ef6d65770560000000000121858 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888015ebe330 RCX=0000000000000000 RDX=ffff8880167a1b40 RSI=ffffffff818d50d7 RDI=ffff888015ebe2f8 RBP=0000000000000000 RSP=ffff888018dffa60 R8 =0000000000000007 R9 =0000000000000000 R10=ffff888015ebe330 R11=0000000000000001 R12=ffff88806ccff018 R13=ffff88800b509a70 R14=dffffc0000000000 R15=ffff888018dffc58 RIP=ffffffff818d50e7 RFL=00000216 [----AP-] 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 00007fe4f5a5a900 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=00007fe4f60120b0 CR3=000000000f094000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000