syzkaller login: [ 40.427249] BUG: Bad rss-counter state mm:000000002b2cd1d7 type:MM_FILEPAGES val:31 [ 40.428243] BUG: Bad rss-counter state mm:000000002b2cd1d7 type:MM_ANONPAGES val:22 [ 40.591770] ================================================================== [ 40.592680] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.593610] Read of size 8 at addr ffff88800dcad798 by task sshd/219 [ 40.594369] [ 40.594593] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.595639] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.596627] Call Trace: [ 40.596945] [ 40.597225] dump_stack_lvl+0x91/0xf0 [ 40.597728] print_report+0xcc/0x620 [ 40.598210] ? __virt_addr_valid+0x102/0x340 [ 40.598757] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.599365] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.599976] kasan_report+0xbe/0xf0 [ 40.600447] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.601070] vma_interval_tree_remove+0xc75/0xec0 [ 40.601672] vma_prepare+0xc54/0x11a0 [ 40.602150] __split_vma+0x5af/0x950 [ 40.602621] ? __pfx___split_vma+0x10/0x10 [ 40.603150] ? find_held_lock+0x2c/0x110 [ 40.603670] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.604233] ? lock_is_held_type+0x9f/0x120 [ 40.604774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.605383] ? mtree_range_walk+0x632/0x900 [ 40.605924] ? mas_walk+0x5c7/0x7c0 [ 40.606397] do_vmi_munmap+0x1f1/0x2b0 [ 40.606887] mmap_region+0x1f9/0x2660 [ 40.607361] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.607866] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.608585] ? __pfx_lock_acquire+0x10/0x10 [ 40.609116] ? __pfx_mmap_region+0x10/0x10 [ 40.609643] ? security_mmap_addr+0x7d/0xa0 [ 40.610178] ? get_unmapped_area+0x1f5/0x3f0 [ 40.610728] do_mmap+0x854/0xf00 [ 40.611161] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.611653] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.612206] ksys_mmap_pgoff+0x3af/0x500 [ 40.612715] do_syscall_64+0x3f/0x90 [ 40.613187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.613825] RIP: 0033:0x7f1b6b421d82 [ 40.614277] 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 [ 40.616388] RSP: 002b:00007fff0a747628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.617297] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b6b421d82 [ 40.618139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b6a85b000 [ 40.618982] RBP: 00007f1b6a85b000 R08: 0000000000000009 R09: 0000000000001000 [ 40.619820] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d30c22ec0 [ 40.620665] R13: 00007fff0a747640 R14: 00007fff0a747670 R15: 00007fff0a7479d0 [ 40.621516] [ 40.621804] [ 40.622017] Allocated by task 212: [ 40.622442] kasan_save_stack+0x22/0x50 [ 40.622944] kasan_set_track+0x25/0x30 [ 40.623433] __kasan_slab_alloc+0x59/0x70 [ 40.623956] kmem_cache_alloc+0x16b/0x370 [ 40.624470] vm_area_dup+0x20/0x160 [ 40.624932] __split_vma+0x170/0x950 [ 40.625399] split_vma+0xc6/0x110 [ 40.625840] mprotect_fixup+0x8d2/0xb30 [ 40.626332] do_mprotect_pkey+0x87e/0xd40 [ 40.626846] __x64_sys_mprotect+0x78/0xc0 [ 40.627358] do_syscall_64+0x3f/0x90 [ 40.627830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.628470] [ 40.628702] Freed by task 212: [ 40.629088] kasan_save_stack+0x22/0x50 [ 40.629584] kasan_set_track+0x25/0x30 [ 40.630076] kasan_save_free_info+0x2b/0x50 [ 40.630614] __kasan_slab_free+0x10a/0x190 [ 40.631139] kmem_cache_free+0x10d/0x4d0 [ 40.631644] rcu_core+0x8c8/0x2860 [ 40.632087] __do_softirq+0x1b7/0x7d4 [ 40.632566] [ 40.632785] Last potentially related work creation: [ 40.633369] kasan_save_stack+0x22/0x50 [ 40.633864] __kasan_record_aux_stack+0x8e/0xa0 [ 40.634436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.635077] remove_vma+0x139/0x170 [ 40.635527] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.636084] do_vmi_munmap+0x1f1/0x2b0 [ 40.636647] __vm_munmap+0x138/0x3a0 [ 40.637112] __x64_sys_munmap+0x59/0x80 [ 40.637604] do_syscall_64+0x3f/0x90 [ 40.638074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.638706] [ 40.638922] The buggy address belongs to the object at ffff88800dcad740 [ 40.638922] which belongs to the cache vm_area_struct of size 168 [ 40.640364] The buggy address is located 88 bytes inside of [ 40.640364] freed 168-byte region [ffff88800dcad740, ffff88800dcad7e8) [ 40.641772] [ 40.641988] The buggy address belongs to the physical page: [ 40.642632] page:00000000da10b632 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcad [ 40.643692] memcg:ffff88800eb2fb01 [ 40.644114] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.644812] page_type: 0xffffffff() [ 40.645257] raw: 0100000000000200 ffff88800879fc80 ffffea0000512c40 dead000000000005 [ 40.646161] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb2fb01 [ 40.647045] page dumped because: kasan: bad access detected [ 40.647698] [ 40.647913] Memory state around the buggy address: [ 40.648483] ffff88800dcad680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.649334] ffff88800dcad700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.650168] >ffff88800dcad780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.651010] ^ [ 40.651493] ffff88800dcad800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.652335] ffff88800dcad880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.653191] ================================================================== [ 40.654175] Disabling lock debugging due to kernel taint [ 42.881682] BUG: Bad rss-counter state mm:00000000994dc067 type:MM_FILEPAGES val:33 [ 42.882737] BUG: Bad rss-counter state mm:00000000994dc067 type:MM_ANONPAGES val:22 [ 43.380914] BUG: Bad rss-counter state mm:000000003ea56bc9 type:MM_FILEPAGES val:33 [ 43.382091] BUG: Bad rss-counter state mm:000000003ea56bc9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15595' (ECDSA) to the list of known hosts. 2023/06/19 12:35:33 fuzzer started 2023/06/19 12:35:33 dialing manager at localhost:44161 2023/06/19 12:35:33 checking machine... 2023/06/19 12:35:33 checking revisions... [ 44.118119] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:35:33 testing simple program... [ 44.169323] cgroup: Unknown subsys name 'net' [ 44.214089] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:35:31 Registers: info registers vcpu 0 RAX=ffffffff8180c585 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff1100d9c135e RSI=ffffffff8180c585 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e97d670 RIP=ffffffff84532440 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 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=00007ffc76378658 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=00007f0dcf99e510000055627b1e1790 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=000000008d6ec857 RBX=000000008af7ee66 RCX=ffff88801470fab0 RDX=000000000000000d RSI=0000000000000008 RDI=00000000a9cd8814 RBP=0000000000000000 RSP=ffff88801470fa00 R8 =000000002bb7ad85 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88801470fa68 R15=000000000000000d RIP=ffffffff82270ebf RFL=00000286 [--S--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 00007f922ca0a900 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=00007f922cfc1618 CR3=000000000e320000 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