syzkaller login: [ 30.731943] BUG: Bad rss-counter state mm:0000000053d1831a type:MM_FILEPAGES val:33 [ 30.733414] BUG: Bad rss-counter state mm:0000000053d1831a type:MM_ANONPAGES val:22 [ 30.925517] ================================================================== [ 30.926550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.927588] Read of size 8 at addr ffff88800c65f228 by task sshd/219 [ 30.928535] [ 30.928776] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.929718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.930815] Call Trace: [ 30.931165] [ 30.931479] dump_stack_lvl+0x91/0xf0 [ 30.932024] print_report+0xcc/0x620 [ 30.932570] ? __virt_addr_valid+0x102/0x340 [ 30.933175] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.933852] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.934566] kasan_report+0xbe/0xf0 [ 30.935105] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.935803] vma_interval_tree_remove+0xc75/0xec0 [ 30.936490] vma_prepare+0xc54/0x11a0 [ 30.937038] __split_vma+0x5af/0x950 [ 30.937570] ? __pfx___split_vma+0x10/0x10 [ 30.938166] ? find_held_lock+0x2c/0x110 [ 30.938761] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.939405] ? lock_is_held_type+0x9f/0x120 [ 30.940032] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.940721] ? mtree_range_walk+0x632/0x900 [ 30.941350] ? mas_walk+0x5c7/0x7c0 [ 30.941888] do_vmi_munmap+0x1f1/0x2b0 [ 30.942459] mmap_region+0x1f9/0x2660 [ 30.943009] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.943594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.944407] ? __pfx_lock_acquire+0x10/0x10 [ 30.945015] ? __pfx_mmap_region+0x10/0x10 [ 30.945618] ? security_mmap_addr+0x7d/0xa0 [ 30.946225] ? get_unmapped_area+0x1f5/0x3f0 [ 30.946891] do_mmap+0x854/0xf00 [ 30.947384] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.947943] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.948572] ksys_mmap_pgoff+0x3af/0x500 [ 30.949144] do_syscall_64+0x3f/0x90 [ 30.949686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.950420] RIP: 0033:0x7fb64d113d82 [ 30.950932] 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 [ 30.953325] RSP: 002b:00007fff06162a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.954348] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb64d113d82 [ 30.955300] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb64c54d000 [ 30.956250] RBP: 00007fb64c54d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.957198] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee80839ec0 [ 30.958147] R13: 00007fff06162a90 R14: 00007fff06162ac0 R15: 00007fff06162e20 [ 30.959126] [ 30.959455] [ 30.959696] Allocated by task 212: [ 30.960175] kasan_save_stack+0x22/0x50 [ 30.960739] kasan_set_track+0x25/0x30 [ 30.961293] __kasan_slab_alloc+0x59/0x70 [ 30.961882] kmem_cache_alloc+0x16b/0x370 [ 30.962470] vm_area_dup+0x20/0x160 [ 30.962976] __split_vma+0x170/0x950 [ 30.963498] split_vma+0xc6/0x110 [ 30.963979] mprotect_fixup+0x8d2/0xb30 [ 30.964540] do_mprotect_pkey+0x87e/0xd40 [ 30.965123] __x64_sys_mprotect+0x78/0xc0 [ 30.965705] do_syscall_64+0x3f/0x90 [ 30.966234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.966977] [ 30.967218] Freed by task 212: [ 30.967654] kasan_save_stack+0x22/0x50 [ 30.968216] kasan_set_track+0x25/0x30 [ 30.968765] kasan_save_free_info+0x2b/0x50 [ 30.969351] __kasan_slab_free+0x10a/0x190 [ 30.969942] kmem_cache_free+0x10d/0x4d0 [ 30.970514] rcu_core+0x8c8/0x2860 [ 30.971001] __do_softirq+0x1b7/0x7d4 [ 30.971527] [ 30.971764] Last potentially related work creation: [ 30.972408] kasan_save_stack+0x22/0x50 [ 30.972957] __kasan_record_aux_stack+0x8e/0xa0 [ 30.973595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.974314] remove_vma+0x139/0x170 [ 30.974810] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.975425] do_vmi_munmap+0x1f1/0x2b0 [ 30.975964] __vm_munmap+0x138/0x3a0 [ 30.976484] __x64_sys_munmap+0x59/0x80 [ 30.977031] do_syscall_64+0x3f/0x90 [ 30.977553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.978255] [ 30.978519] The buggy address belongs to the object at ffff88800c65f1d0 [ 30.978519] which belongs to the cache vm_area_struct of size 168 [ 30.980137] The buggy address is located 88 bytes inside of [ 30.980137] freed 168-byte region [ffff88800c65f1d0, ffff88800c65f278) [ 30.981684] [ 30.981922] The buggy address belongs to the physical page: [ 30.982654] page:00000000bcb4c5c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc65f [ 30.983847] memcg:ffff88800e353301 [ 30.984315] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.985027] page_type: 0xffffffff() [ 30.985525] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.986545] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e353301 [ 30.987542] page dumped because: kasan: bad access detected [ 30.988268] [ 30.988505] Memory state around the buggy address: [ 30.989145] ffff88800c65f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.990089] ffff88800c65f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.991033] >ffff88800c65f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.991949] ^ [ 30.992544] ffff88800c65f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.993468] ffff88800c65f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.994388] ================================================================== [ 30.995528] Disabling lock debugging due to kernel taint [ 33.322242] BUG: Bad rss-counter state mm:0000000092e63be1 type:MM_FILEPAGES val:33 [ 33.323269] BUG: Bad rss-counter state mm:0000000092e63be1 type:MM_ANONPAGES val:22 [ 33.798693] BUG: Bad rss-counter state mm:0000000014d1ce2c type:MM_FILEPAGES val:33 [ 33.799693] BUG: Bad rss-counter state mm:0000000014d1ce2c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56115' (ECDSA) to the list of known hosts. 2023/06/20 17:42:58 fuzzer started 2023/06/20 17:42:58 dialing manager at localhost:36067 2023/06/20 17:42:58 checking machine... 2023/06/20 17:42:58 checking revisions... [ 34.504204] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:42:58 testing simple program... [ 34.560462] cgroup: Unknown subsys name 'net' [ 34.623930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:42:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880186a7c20 RCX=ffffffff81f75e60 RDX=ffff88800f288000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffff849c9c80 RSP=ffff8880186a7990 R8 =0000000000000001 R9 =0000000000000007 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000001 R14=0000000000000007 R15=0000000000000083 RIP=ffffffff814c04ba 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 00007f60ef09e900 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=00007f60ef653650 CR3=0000000016f3a000 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=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffff8880186a7a80 RDX=1ffff110030d4f47 RSI=ffffffff813ad720 RDI=ffff8880186a7aa8 RBP=ffff8880186a7a78 RSP=ffff8880186a79d0 R8 =0000000000000001 R9 =ffff8880186a7a20 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880186a7aa8 R13=0000000000000000 R14=ffff88800f288000 R15=ffff88800f244000 RIP=ffffffff813ad47f 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 00007f60ef09e900 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=00007f60ef6560b0 CR3=0000000016f3a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000