syzkaller login: [ 30.631786] BUG: Bad rss-counter state mm:00000000e9ebef04 type:MM_FILEPAGES val:33 [ 30.632995] BUG: Bad rss-counter state mm:00000000e9ebef04 type:MM_ANONPAGES val:22 [ 30.674874] ================================================================== [ 30.675851] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.676974] Read of size 8 at addr ffff88800c63cb38 by task sshd/219 [ 30.677785] [ 30.678040] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.679004] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.679971] Call Trace: [ 30.680288] [ 30.680571] dump_stack_lvl+0x91/0xf0 [ 30.681067] print_report+0xcc/0x620 [ 30.681543] ? __virt_addr_valid+0x102/0x340 [ 30.682102] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.682737] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.683349] kasan_report+0xbe/0xf0 [ 30.683826] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.684450] vma_interval_tree_remove+0xc75/0xec0 [ 30.685051] vma_prepare+0xc54/0x11a0 [ 30.685528] __split_vma+0x5af/0x950 [ 30.686004] ? __pfx___split_vma+0x10/0x10 [ 30.686554] ? find_held_lock+0x2c/0x110 [ 30.687073] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.687652] ? lock_is_held_type+0x9f/0x120 [ 30.688199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.688804] ? mtree_range_walk+0x632/0x900 [ 30.689365] ? mas_walk+0x5c7/0x7c0 [ 30.689839] do_vmi_munmap+0x1f1/0x2b0 [ 30.690335] mmap_region+0x1f9/0x2660 [ 30.690813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.691321] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.692048] ? __pfx_lock_acquire+0x10/0x10 [ 30.692585] ? __pfx_mmap_region+0x10/0x10 [ 30.693111] ? security_mmap_addr+0x7d/0xa0 [ 30.693641] ? get_unmapped_area+0x1f5/0x3f0 [ 30.694222] do_mmap+0x854/0xf00 [ 30.694658] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.695157] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.695725] ksys_mmap_pgoff+0x3af/0x500 [ 30.696234] do_syscall_64+0x3f/0x90 [ 30.696715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.697366] RIP: 0033:0x7f9e36bedd82 [ 30.697823] 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 [ 30.699930] RSP: 002b:00007ffe8966da78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.700834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e36bedd82 [ 30.701675] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e36027000 [ 30.702546] RBP: 00007f9e36027000 R08: 0000000000000009 R09: 0000000000001000 [ 30.703384] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b13a19fec0 [ 30.704252] R13: 00007ffe8966da90 R14: 00007ffe8966dac0 R15: 00007ffe8966de20 [ 30.705105] [ 30.705394] [ 30.705611] Allocated by task 212: [ 30.706040] kasan_save_stack+0x22/0x50 [ 30.706552] kasan_set_track+0x25/0x30 [ 30.707044] __kasan_slab_alloc+0x59/0x70 [ 30.707569] kmem_cache_alloc+0x16b/0x370 [ 30.708084] vm_area_dup+0x20/0x160 [ 30.708546] __split_vma+0x170/0x950 [ 30.709013] split_vma+0xc6/0x110 [ 30.709452] mprotect_fixup+0x8d2/0xb30 [ 30.709951] do_mprotect_pkey+0x87e/0xd40 [ 30.710479] __x64_sys_mprotect+0x78/0xc0 [ 30.710998] do_syscall_64+0x3f/0x90 [ 30.711475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.712137] [ 30.712358] Freed by task 212: [ 30.712760] kasan_save_stack+0x22/0x50 [ 30.713262] kasan_set_track+0x25/0x30 [ 30.713757] kasan_save_free_info+0x2b/0x50 [ 30.714302] __kasan_slab_free+0x10a/0x190 [ 30.714835] kmem_cache_free+0x10d/0x4d0 [ 30.715341] rcu_core+0x8c8/0x2860 [ 30.715855] __do_softirq+0x1b7/0x7d4 [ 30.716347] [ 30.716568] Last potentially related work creation: [ 30.717151] kasan_save_stack+0x22/0x50 [ 30.717653] __kasan_record_aux_stack+0x8e/0xa0 [ 30.718235] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.718882] remove_vma+0x139/0x170 [ 30.719328] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.719892] do_vmi_munmap+0x1f1/0x2b0 [ 30.720375] __vm_munmap+0x138/0x3a0 [ 30.720846] __x64_sys_munmap+0x59/0x80 [ 30.721345] do_syscall_64+0x3f/0x90 [ 30.721820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722470] [ 30.722687] The buggy address belongs to the object at ffff88800c63cae0 [ 30.722687] which belongs to the cache vm_area_struct of size 168 [ 30.724143] The buggy address is located 88 bytes inside of [ 30.724143] freed 168-byte region [ffff88800c63cae0, ffff88800c63cb88) [ 30.725531] [ 30.725748] The buggy address belongs to the physical page: [ 30.726441] page:000000005df52953 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc63c [ 30.727510] memcg:ffff88800dfe4101 [ 30.727936] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.728579] page_type: 0xffffffff() [ 30.729034] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.729951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfe4101 [ 30.730858] page dumped because: kasan: bad access detected [ 30.731517] [ 30.731731] Memory state around the buggy address: [ 30.732302] ffff88800c63ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.733153] ffff88800c63ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.734003] >ffff88800c63cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.734860] ^ [ 30.735462] ffff88800c63cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.736309] ffff88800c63cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.737155] ================================================================== [ 30.738126] Disabling lock debugging due to kernel taint [ 33.251470] BUG: Bad rss-counter state mm:0000000081364e49 type:MM_FILEPAGES val:33 [ 33.252473] BUG: Bad rss-counter state mm:0000000081364e49 type:MM_ANONPAGES val:22 [ 33.651712] BUG: Bad rss-counter state mm:00000000b990ddfa type:MM_FILEPAGES val:33 [ 33.652712] BUG: Bad rss-counter state mm:00000000b990ddfa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50276' (ECDSA) to the list of known hosts. 2023/06/21 00:38:30 fuzzer started 2023/06/21 00:38:30 dialing manager at localhost:36067 2023/06/21 00:38:30 checking machine... 2023/06/21 00:38:30 checking revisions... [ 34.380555] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:38:30 testing simple program... [ 34.433906] cgroup: Unknown subsys name 'net' [ 34.488047] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:38:30 Registers: info registers vcpu 0 RAX=ffffffff8186bc51 RBX=ffffffff85e05050 RCX=ffffffff8186c182 RDX=0000000000000000 RSI=ffffffff861436da RDI=ffffffff85e05050 RBP=ffffffff85e05054 RSP=ffff88806ce09998 R8 =ffffffff861436da R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000229a3 R12=ffffffff85e05050 R13=ffffffff85e05050 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f5d17769900 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=00007f47cc131000 CR3=000000000f302000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffc5cf4abf8 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=00007f709bc31510000055f9eb3e8790 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