syzkaller login: [ 31.881767] BUG: Bad rss-counter state mm:000000009d89a50f type:MM_FILEPAGES val:33 [ 31.883455] BUG: Bad rss-counter state mm:000000009d89a50f type:MM_ANONPAGES val:22 [ 32.052828] ================================================================== [ 32.053852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.054803] Read of size 8 at addr ffff88800e1fe5c8 by task sshd/223 [ 32.055713] [ 32.055939] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.056818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.057844] Call Trace: [ 32.058162] [ 32.058448] dump_stack_lvl+0x91/0xf0 [ 32.058961] print_report+0xcc/0x620 [ 32.059446] ? __virt_addr_valid+0x102/0x340 [ 32.059995] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.060615] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.061245] kasan_report+0xbe/0xf0 [ 32.061716] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.062325] vma_interval_tree_remove+0xc75/0xec0 [ 32.062925] vma_prepare+0xc54/0x11a0 [ 32.063399] __split_vma+0x5af/0x950 [ 32.063861] ? __pfx___split_vma+0x10/0x10 [ 32.064385] ? find_held_lock+0x2c/0x110 [ 32.064903] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.065481] ? lock_is_held_type+0x9f/0x120 [ 32.066015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.066622] ? mtree_range_walk+0x632/0x900 [ 32.067175] ? mas_walk+0x5c7/0x7c0 [ 32.067642] do_vmi_munmap+0x1f1/0x2b0 [ 32.068126] mmap_region+0x1f9/0x2660 [ 32.068601] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.069139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.069861] ? __pfx_lock_acquire+0x10/0x10 [ 32.070395] ? __pfx_mmap_region+0x10/0x10 [ 32.070928] ? security_mmap_addr+0x7d/0xa0 [ 32.071461] ? get_unmapped_area+0x1f5/0x3f0 [ 32.072011] do_mmap+0x854/0xf00 [ 32.072449] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.072945] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.073532] ksys_mmap_pgoff+0x3af/0x500 [ 32.074046] do_syscall_64+0x3f/0x90 [ 32.074531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.075177] RIP: 0033:0x7f6a3efc8d82 [ 32.075643] 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 [ 32.077766] RSP: 002b:00007ffdd5c1b928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.078675] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a3efc8d82 [ 32.079520] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a3e402000 [ 32.080369] RBP: 00007f6a3e402000 R08: 0000000000000009 R09: 0000000000001000 [ 32.081225] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c27c14ec0 [ 32.082080] R13: 00007ffdd5c1b940 R14: 00007ffdd5c1b970 R15: 00007ffdd5c1bcd0 [ 32.082958] [ 32.083245] [ 32.083458] Allocated by task 216: [ 32.083887] kasan_save_stack+0x22/0x50 [ 32.084387] kasan_set_track+0x25/0x30 [ 32.084891] __kasan_slab_alloc+0x59/0x70 [ 32.085432] kmem_cache_alloc+0x16b/0x370 [ 32.085945] vm_area_dup+0x20/0x160 [ 32.086407] __split_vma+0x170/0x950 [ 32.086874] split_vma+0xc6/0x110 [ 32.087309] mprotect_fixup+0x8d2/0xb30 [ 32.087810] do_mprotect_pkey+0x87e/0xd40 [ 32.088324] __x64_sys_mprotect+0x78/0xc0 [ 32.088839] do_syscall_64+0x3f/0x90 [ 32.089329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.089966] [ 32.090181] Freed by task 216: [ 32.090580] kasan_save_stack+0x22/0x50 [ 32.091079] kasan_set_track+0x25/0x30 [ 32.091570] kasan_save_free_info+0x2b/0x50 [ 32.092103] __kasan_slab_free+0x10a/0x190 [ 32.092637] kmem_cache_free+0x10d/0x4d0 [ 32.093160] rcu_core+0x8c8/0x2860 [ 32.093602] __do_softirq+0x1b7/0x7d4 [ 32.094079] [ 32.094291] Last potentially related work creation: [ 32.094885] kasan_save_stack+0x22/0x50 [ 32.095394] __kasan_record_aux_stack+0x8e/0xa0 [ 32.095959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.096602] remove_vma+0x139/0x170 [ 32.097059] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.097617] do_vmi_munmap+0x1f1/0x2b0 [ 32.098103] __vm_munmap+0x138/0x3a0 [ 32.098564] __x64_sys_munmap+0x59/0x80 [ 32.099056] do_syscall_64+0x3f/0x90 [ 32.099523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.100156] [ 32.100369] The buggy address belongs to the object at ffff88800e1fe570 [ 32.100369] which belongs to the cache vm_area_struct of size 168 [ 32.101855] The buggy address is located 88 bytes inside of [ 32.101855] freed 168-byte region [ffff88800e1fe570, ffff88800e1fe618) [ 32.103238] [ 32.103452] The buggy address belongs to the physical page: [ 32.104107] page:00000000ff648ea8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1fe [ 32.105221] memcg:ffff88800ec05601 [ 32.105646] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.106337] page_type: 0xffffffff() [ 32.106784] raw: 0100000000000200 ffff8880087a0c80 ffffea000036d2c0 dead000000000007 [ 32.107692] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec05601 [ 32.108588] page dumped because: kasan: bad access detected [ 32.109264] [ 32.109479] Memory state around the buggy address: [ 32.110051] ffff88800e1fe480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.110905] ffff88800e1fe500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.111759] >ffff88800e1fe580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.112607] ^ [ 32.113273] ffff88800e1fe600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.114116] ffff88800e1fe680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.114954] ================================================================== [ 32.116091] Disabling lock debugging due to kernel taint [ 34.137382] BUG: Bad rss-counter state mm:0000000092d3baee type:MM_FILEPAGES val:33 [ 34.138452] BUG: Bad rss-counter state mm:0000000092d3baee type:MM_ANONPAGES val:22 [ 34.615119] BUG: Bad rss-counter state mm:00000000304ad7f6 type:MM_FILEPAGES val:33 [ 34.616107] BUG: Bad rss-counter state mm:00000000304ad7f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11113' (ECDSA) to the list of known hosts. 2023/06/21 02:04:47 fuzzer started 2023/06/21 02:04:47 dialing manager at localhost:36067 2023/06/21 02:04:47 checking machine... 2023/06/21 02:04:47 checking revisions... [ 35.342141] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:04:47 testing simple program... [ 35.396379] cgroup: Unknown subsys name 'net' [ 35.442328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:04:47 Registers: info registers vcpu 0 RAX=00000000d535e85d RBX=00000000c4c6c6e1 RCX=ffff88800fcb7a0c RDX=000000000000000d RSI=0000000000000005 RDI=00000000b12a3f46 RBP=0000000000000000 RSP=ffff88800fcb7950 R8 =000000001e51ea58 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800fcb79b8 R15=000000000000000d RIP=ffffffff82270472 RFL=00000287 [--S--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 00007f5cc7762900 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=00007f5cc7d17650 CR3=000000000c6f2000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea00005bab40 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000014 RSP=ffff888008d7f180 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000009293 R12=00000000ffffffff R13=ffff88807ffdc000 R14=ffffea00005bab40 R15=ffff88800f077000 RIP=ffffffff81830c89 RFL=00000046 [---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 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=00007ffcbb388338 CR3=000000000ef26000 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=2037343a34303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a34303a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000