syzkaller login: [ 35.661490] BUG: Bad rss-counter state mm:00000000def368d0 type:MM_FILEPAGES val:33 [ 35.662707] BUG: Bad rss-counter state mm:00000000def368d0 type:MM_ANONPAGES val:22 [ 35.703629] ================================================================== [ 35.704787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.706007] Read of size 8 at addr ffff888016df83f8 by task sshd/219 [ 35.706938] [ 35.707192] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.708224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.709422] Call Trace: [ 35.709803] [ 35.710136] dump_stack_lvl+0x91/0xf0 [ 35.710721] print_report+0xcc/0x620 [ 35.711296] ? __virt_addr_valid+0x102/0x340 [ 35.711956] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.712699] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.713432] kasan_report+0xbe/0xf0 [ 35.713998] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.714741] vma_interval_tree_remove+0xc75/0xec0 [ 35.715471] vma_prepare+0xc54/0x11a0 [ 35.716046] __split_vma+0x5af/0x950 [ 35.716633] ? __pfx___split_vma+0x10/0x10 [ 35.717271] ? find_held_lock+0x2c/0x110 [ 35.717897] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.718580] ? lock_is_held_type+0x9f/0x120 [ 35.719228] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.719972] ? mtree_range_walk+0x632/0x900 [ 35.720642] ? mas_walk+0x5c7/0x7c0 [ 35.721208] do_vmi_munmap+0x1f1/0x2b0 [ 35.721807] mmap_region+0x1f9/0x2660 [ 35.722395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.723007] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.723876] ? __pfx_lock_acquire+0x10/0x10 [ 35.724543] ? __pfx_mmap_region+0x10/0x10 [ 35.725174] ? security_mmap_addr+0x7d/0xa0 [ 35.725809] ? get_unmapped_area+0x1f5/0x3f0 [ 35.726471] do_mmap+0x854/0xf00 [ 35.726995] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.727586] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.728263] ksys_mmap_pgoff+0x3af/0x500 [ 35.728882] do_syscall_64+0x3f/0x90 [ 35.729463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.730244] RIP: 0033:0x7f075f685d82 [ 35.730791] 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 [ 35.733368] RSP: 002b:00007fff3b42d148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.734458] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f075f685d82 [ 35.735490] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f075eabf000 [ 35.736540] RBP: 00007f075eabf000 R08: 0000000000000009 R09: 0000000000001000 [ 35.737574] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556255e6aec0 [ 35.738606] R13: 00007fff3b42d160 R14: 00007fff3b42d190 R15: 00007fff3b42d4f0 [ 35.739415] [ 35.739692] [ 35.739901] Allocated by task 212: [ 35.740310] kasan_save_stack+0x22/0x50 [ 35.740804] kasan_set_track+0x25/0x30 [ 35.741278] __kasan_slab_alloc+0x59/0x70 [ 35.741779] kmem_cache_alloc+0x16b/0x370 [ 35.742268] vm_area_dup+0x20/0x160 [ 35.742701] __split_vma+0x170/0x950 [ 35.743145] split_vma+0xc6/0x110 [ 35.743562] mprotect_fixup+0x8d2/0xb30 [ 35.744047] do_mprotect_pkey+0x87e/0xd40 [ 35.744561] __x64_sys_mprotect+0x78/0xc0 [ 35.745069] do_syscall_64+0x3f/0x90 [ 35.745522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.746123] [ 35.746327] Freed by task 212: [ 35.746697] kasan_save_stack+0x22/0x50 [ 35.747178] kasan_set_track+0x25/0x30 [ 35.747650] kasan_save_free_info+0x2b/0x50 [ 35.748157] __kasan_slab_free+0x10a/0x190 [ 35.748670] kmem_cache_free+0x10d/0x4d0 [ 35.749154] rcu_core+0x8c8/0x2860 [ 35.749595] __do_softirq+0x1b7/0x7d4 [ 35.750064] [ 35.750273] Last potentially related work creation: [ 35.750852] kasan_save_stack+0x22/0x50 [ 35.751344] __kasan_record_aux_stack+0x8e/0xa0 [ 35.751901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.752529] remove_vma+0x139/0x170 [ 35.752975] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.753521] do_vmi_munmap+0x1f1/0x2b0 [ 35.754002] __vm_munmap+0x138/0x3a0 [ 35.754463] __x64_sys_munmap+0x59/0x80 [ 35.754952] do_syscall_64+0x3f/0x90 [ 35.755410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.756043] [ 35.756256] The buggy address belongs to the object at ffff888016df83a0 [ 35.756256] which belongs to the cache vm_area_struct of size 168 [ 35.757722] The buggy address is located 88 bytes inside of [ 35.757722] freed 168-byte region [ffff888016df83a0, ffff888016df8448) [ 35.759111] [ 35.759320] The buggy address belongs to the physical page: [ 35.759975] page:00000000e65d41fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16df8 [ 35.761054] memcg:ffff888015ab3801 [ 35.761473] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.762110] page_type: 0xffffffff() [ 35.762550] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.763449] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ab3801 [ 35.764343] page dumped because: kasan: bad access detected [ 35.765002] [ 35.765221] Memory state around the buggy address: [ 35.765810] ffff888016df8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.766645] ffff888016df8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.767484] >ffff888016df8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.768320] ^ [ 35.769159] ffff888016df8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.770075] ffff888016df8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.771003] ================================================================== [ 35.772137] Disabling lock debugging due to kernel taint [ 38.446582] BUG: Bad rss-counter state mm:00000000fae321cd type:MM_FILEPAGES val:33 [ 38.447770] BUG: Bad rss-counter state mm:00000000fae321cd type:MM_ANONPAGES val:22 [ 38.962089] BUG: Bad rss-counter state mm:000000007ddb3ed0 type:MM_FILEPAGES val:33 [ 38.963273] BUG: Bad rss-counter state mm:000000007ddb3ed0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60362' (ECDSA) to the list of known hosts. 2023/06/19 21:51:31 fuzzer started 2023/06/19 21:51:32 dialing manager at localhost:44161 2023/06/19 21:51:32 checking machine... 2023/06/19 21:51:32 checking revisions... [ 39.577451] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:51:32 testing simple program... [ 39.616663] cgroup: Unknown subsys name 'net' [ 39.671372] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:51:27 Registers: info registers vcpu 0 RAX=1ffffffff0c26ebc RBX=0000000000000001 RCX=ffffffff861375e0 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff861375e2 RBP=ffff8880133dfa40 RSP=ffff8880133df978 R8 =ffffffff861375e4 R9 =ffff8880133dfa28 R10=0000000000038001 R11=0000000000020dae R12=ffff8880133dfa48 R13=ffff8880133dfa30 R14=ffff8880133dfd80 R15=ffff8880133df9e8 RIP=ffffffff811311c7 RFL=00000212 [----A--] 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 00007f08659a1900 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=00007f0865f56650 CR3=000000001c926000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007fff26b4d568 CR3=0000000005482000 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=00007fefe791e51000005606b5312790 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