syzkaller login: [ 29.707056] BUG: Bad rss-counter state mm:00000000669c44d5 type:MM_FILEPAGES val:33 [ 29.708495] BUG: Bad rss-counter state mm:00000000669c44d5 type:MM_ANONPAGES val:22 [ 29.851674] ================================================================== [ 29.852582] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.853569] Read of size 8 at addr ffff88800e2fe798 by task sshd/222 [ 29.854339] [ 29.854660] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.855540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.856528] Call Trace: [ 29.856867] [ 29.857154] dump_stack_lvl+0x91/0xf0 [ 29.857658] print_report+0xcc/0x620 [ 29.858146] ? __virt_addr_valid+0x102/0x340 [ 29.858697] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.859324] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.859951] kasan_report+0xbe/0xf0 [ 29.860429] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.861091] vma_interval_tree_remove+0xc75/0xec0 [ 29.861731] vma_prepare+0xc54/0x11a0 [ 29.862235] __split_vma+0x5af/0x950 [ 29.862733] ? __pfx___split_vma+0x10/0x10 [ 29.863286] ? find_held_lock+0x2c/0x110 [ 29.863828] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.864422] ? lock_is_held_type+0x9f/0x120 [ 29.864987] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.865651] ? mtree_range_walk+0x632/0x900 [ 29.866234] ? mas_walk+0x5c7/0x7c0 [ 29.866726] do_vmi_munmap+0x1f1/0x2b0 [ 29.867251] mmap_region+0x1f9/0x2660 [ 29.867761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.868302] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.869054] ? __pfx_lock_acquire+0x10/0x10 [ 29.869618] ? __pfx_mmap_region+0x10/0x10 [ 29.870181] ? security_mmap_addr+0x7d/0xa0 [ 29.870753] ? get_unmapped_area+0x1f5/0x3f0 [ 29.871338] do_mmap+0x854/0xf00 [ 29.871807] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.872329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.872920] ksys_mmap_pgoff+0x3af/0x500 [ 29.873449] do_syscall_64+0x3f/0x90 [ 29.873980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.874658] RIP: 0033:0x7f1fd7c3ad82 [ 29.875139] 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 [ 29.877408] RSP: 002b:00007ffc4b75a288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.878384] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1fd7c3ad82 [ 29.879293] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1fd7074000 [ 29.880203] RBP: 00007f1fd7074000 R08: 0000000000000009 R09: 0000000000001000 [ 29.881096] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0c6ecfec0 [ 29.882006] R13: 00007ffc4b75a2a0 R14: 00007ffc4b75a2d0 R15: 00007ffc4b75a630 [ 29.882912] [ 29.883221] [ 29.883444] Allocated by task 215: [ 29.883894] kasan_save_stack+0x22/0x50 [ 29.884424] kasan_set_track+0x25/0x30 [ 29.884940] __kasan_slab_alloc+0x59/0x70 [ 29.885492] kmem_cache_alloc+0x16b/0x370 [ 29.886061] vm_area_dup+0x20/0x160 [ 29.886542] __split_vma+0x170/0x950 [ 29.887031] split_vma+0xc6/0x110 [ 29.887495] mprotect_fixup+0x8d2/0xb30 [ 29.888023] do_mprotect_pkey+0x87e/0xd40 [ 29.888581] __x64_sys_mprotect+0x78/0xc0 [ 29.889130] do_syscall_64+0x3f/0x90 [ 29.889643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.890321] [ 29.890545] Freed by task 215: [ 29.890959] kasan_save_stack+0x22/0x50 [ 29.891496] kasan_set_track+0x25/0x30 [ 29.892012] kasan_save_free_info+0x2b/0x50 [ 29.892567] __kasan_slab_free+0x10a/0x190 [ 29.893138] kmem_cache_free+0x10d/0x4d0 [ 29.893686] rcu_core+0x8c8/0x2860 [ 29.894152] __do_softirq+0x1b7/0x7d4 [ 29.894674] [ 29.894902] Last potentially related work creation: [ 29.895517] kasan_save_stack+0x22/0x50 [ 29.896048] __kasan_record_aux_stack+0x8e/0xa0 [ 29.896656] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.897331] remove_vma+0x139/0x170 [ 29.897824] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.898414] do_vmi_munmap+0x1f1/0x2b0 [ 29.898925] __vm_munmap+0x138/0x3a0 [ 29.899421] __x64_sys_munmap+0x59/0x80 [ 29.899949] do_syscall_64+0x3f/0x90 [ 29.900451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.901132] [ 29.901362] The buggy address belongs to the object at ffff88800e2fe740 [ 29.901362] which belongs to the cache vm_area_struct of size 168 [ 29.902938] The buggy address is located 88 bytes inside of [ 29.902938] freed 168-byte region [ffff88800e2fe740, ffff88800e2fe7e8) [ 29.904420] [ 29.904648] The buggy address belongs to the physical page: [ 29.905337] page:000000007ba12ae4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2fe [ 29.906485] memcg:ffff88800de87601 [ 29.906926] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.907621] page_type: 0xffffffff() [ 29.908098] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.909090] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de87601 [ 29.910072] page dumped because: kasan: bad access detected [ 29.910768] [ 29.910998] Memory state around the buggy address: [ 29.911613] ffff88800e2fe680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.912519] ffff88800e2fe700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.913437] >ffff88800e2fe780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.914344] ^ [ 29.914872] ffff88800e2fe800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.915782] ffff88800e2fe880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.916683] ================================================================== [ 29.918072] Disabling lock debugging due to kernel taint [ 31.836715] BUG: Bad rss-counter state mm:00000000b1ef9e53 type:MM_FILEPAGES val:33 [ 31.837860] BUG: Bad rss-counter state mm:00000000b1ef9e53 type:MM_ANONPAGES val:22 [ 32.370407] BUG: Bad rss-counter state mm:00000000c3134d96 type:MM_FILEPAGES val:33 [ 32.371437] BUG: Bad rss-counter state mm:00000000c3134d96 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14256' (ECDSA) to the list of known hosts. 2023/06/21 01:44:46 fuzzer started 2023/06/21 01:44:46 dialing manager at localhost:36067 2023/06/21 01:44:46 checking machine... 2023/06/21 01:44:46 checking revisions... [ 33.092019] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:44:46 testing simple program... [ 33.137260] cgroup: Unknown subsys name 'net' [ 33.174387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:44:46 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810727 RSP=ffff88806ce09de8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffffea0000335640 R14=ffffffff813782f8 R15=ffff88800cd59a10 RIP=ffffffff815343fe RFL=00000047 [---Z-PC] 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 00007f0dc0089900 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=00007ffc686ad000 CR3=000000000ed92000 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=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 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=0000000000000001 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=00007ff93e1b8440 CR3=000000000ca7c000 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=297abe8c8f7407baf84d8292cd5fce8b XMM02=000000000011a140eff9b2d0a8fce9cb XMM03=000000000011a2102c67c8bc2e329bc3 XMM04=bcc59d71caa5ba9000000000000ae988 XMM05=59d5b690e0af863b00000000001317e0 XMM06=e42a0292a60768930000000000130648 XMM07=e042d86d42eb936e0000000000121ca0 XMM08=0f890e10b4da9e10000000000011a210 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000