syzkaller login: [ 28.656815] BUG: Bad rss-counter state mm:0000000092cdd80d type:MM_FILEPAGES val:33 [ 28.657991] BUG: Bad rss-counter state mm:0000000092cdd80d type:MM_ANONPAGES val:22 [ 28.814761] ================================================================== [ 28.815705] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.816660] Read of size 8 at addr ffff888016888c20 by task sshd/219 [ 28.817451] [ 28.817797] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.818699] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.819712] Call Trace: [ 28.820042] [ 28.820331] dump_stack_lvl+0x91/0xf0 [ 28.820844] print_report+0xcc/0x620 [ 28.821347] ? __virt_addr_valid+0x102/0x340 [ 28.821948] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.822591] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.823232] kasan_report+0xbe/0xf0 [ 28.823720] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.824360] vma_interval_tree_remove+0xc75/0xec0 [ 28.824984] vma_prepare+0xc54/0x11a0 [ 28.825486] __split_vma+0x5af/0x950 [ 28.825989] ? __pfx___split_vma+0x10/0x10 [ 28.826539] ? find_held_lock+0x2c/0x110 [ 28.827077] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.827671] ? lock_is_held_type+0x9f/0x120 [ 28.828233] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.828865] ? mtree_range_walk+0x632/0x900 [ 28.829440] ? mas_walk+0x5c7/0x7c0 [ 28.829935] do_vmi_munmap+0x1f1/0x2b0 [ 28.830438] mmap_region+0x1f9/0x2660 [ 28.830934] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.831454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.832199] ? __pfx_lock_acquire+0x10/0x10 [ 28.832761] ? __pfx_mmap_region+0x10/0x10 [ 28.833317] ? security_mmap_addr+0x7d/0xa0 [ 28.833905] ? get_unmapped_area+0x1f5/0x3f0 [ 28.834485] do_mmap+0x854/0xf00 [ 28.834954] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.835480] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.836082] ksys_mmap_pgoff+0x3af/0x500 [ 28.836623] do_syscall_64+0x3f/0x90 [ 28.837131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.837834] RIP: 0033:0x7f615d90fd82 [ 28.838327] 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 [ 28.840635] RSP: 002b:00007ffd803fd618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.841610] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f615d90fd82 [ 28.842538] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f615cd49000 [ 28.843448] RBP: 00007f615cd49000 R08: 0000000000000009 R09: 0000000000001000 [ 28.844372] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a8b09aec0 [ 28.845279] R13: 00007ffd803fd630 R14: 00007ffd803fd660 R15: 00007ffd803fd9c0 [ 28.846229] [ 28.846538] [ 28.846764] Allocated by task 212: [ 28.847223] kasan_save_stack+0x22/0x50 [ 28.847767] kasan_set_track+0x25/0x30 [ 28.848306] __kasan_slab_alloc+0x59/0x70 [ 28.848873] kmem_cache_alloc+0x16b/0x370 [ 28.849427] vm_area_dup+0x20/0x160 [ 28.849920] __split_vma+0x170/0x950 [ 28.850420] split_vma+0xc6/0x110 [ 28.850891] mprotect_fixup+0x8d2/0xb30 [ 28.851427] do_mprotect_pkey+0x87e/0xd40 [ 28.851981] __x64_sys_mprotect+0x78/0xc0 [ 28.852539] do_syscall_64+0x3f/0x90 [ 28.853048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.853751] [ 28.853978] Freed by task 212: [ 28.854393] kasan_save_stack+0x22/0x50 [ 28.854932] kasan_set_track+0x25/0x30 [ 28.855455] kasan_save_free_info+0x2b/0x50 [ 28.856028] __kasan_slab_free+0x10a/0x190 [ 28.856600] kmem_cache_free+0x10d/0x4d0 [ 28.857146] rcu_core+0x8c8/0x2860 [ 28.857617] __do_softirq+0x1b7/0x7d4 [ 28.858146] [ 28.858374] Last potentially related work creation: [ 28.859037] kasan_save_stack+0x22/0x50 [ 28.859574] __kasan_record_aux_stack+0x8e/0xa0 [ 28.860187] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.860874] remove_vma+0x139/0x170 [ 28.861364] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.861982] do_vmi_munmap+0x1f1/0x2b0 [ 28.862497] __vm_munmap+0x138/0x3a0 [ 28.862995] __x64_sys_munmap+0x59/0x80 [ 28.863530] do_syscall_64+0x3f/0x90 [ 28.864039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.864733] [ 28.864961] The buggy address belongs to the object at ffff888016888bc8 [ 28.864961] which belongs to the cache vm_area_struct of size 168 [ 28.866554] The buggy address is located 88 bytes inside of [ 28.866554] freed 168-byte region [ffff888016888bc8, ffff888016888c70) [ 28.868074] [ 28.868307] The buggy address belongs to the physical page: [ 28.869022] page:0000000083c4e7c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16888 [ 28.870206] memcg:ffff88800c6af301 [ 28.870665] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.871367] page_type: 0xffffffff() [ 28.871857] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.872847] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6af301 [ 28.873846] page dumped because: kasan: bad access detected [ 28.874560] [ 28.874792] Memory state around the buggy address: [ 28.875416] ffff888016888b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.876334] ffff888016888b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.877253] >ffff888016888c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.878179] ^ [ 28.878744] ffff888016888c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.879664] ffff888016888d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.880577] ================================================================== [ 28.881556] Disabling lock debugging due to kernel taint [ 31.431386] BUG: Bad rss-counter state mm:0000000060c889ca type:MM_FILEPAGES val:33 [ 31.433040] BUG: Bad rss-counter state mm:0000000060c889ca type:MM_ANONPAGES val:22 [ 31.996426] BUG: Bad rss-counter state mm:00000000be2abe35 type:MM_FILEPAGES val:33 [ 31.997588] BUG: Bad rss-counter state mm:00000000be2abe35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32929' (ECDSA) to the list of known hosts. 2023/06/21 01:49:08 fuzzer started 2023/06/21 01:49:08 dialing manager at localhost:36067 2023/06/21 01:49:08 checking machine... 2023/06/21 01:49:08 checking revisions... [ 32.638282] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:49:08 testing simple program... [ 32.680929] cgroup: Unknown subsys name 'net' [ 32.734455] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:49:07 Registers: info registers vcpu 0 RAX=0000000000000050 RBX=ffff88800b9b8000 RCX=0000000000000000 RDX=0000000000010177 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff8880100cf420 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010177 R11=0000000000000128 R12=0000000000010177 R13=ffffed1001737001 R14=dffffc0000000000 R15=ffffffff85a23960 RIP=ffffffff8219168f RFL=00000093 [--S-A-C] 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=00007ffc2ea6ff48 CR3=00000000165a0000 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=39343a3130203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732037303a3934 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323739 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff83ab1b55 RDX=000000000000005a RSI=00000000000000ff RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880166ef500 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000005a R11=000008ca000008ca R12=0000000000000000 R13=000000000000005a R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0250 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 00007fe638e8e900 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=00007ffcaa423000 CR3=0000000016946000 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=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