syzkaller login: [ 30.197340] BUG: Bad rss-counter state mm:00000000687521a1 type:MM_FILEPAGES val:33 [ 30.197901] BUG: Bad rss-counter state mm:00000000687521a1 type:MM_ANONPAGES val:22 [ 30.308170] ================================================================== [ 30.308910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.309642] Read of size 8 at addr ffff88800cbb9798 by task sshd/219 [ 30.310243] [ 30.310411] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.311276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.312051] Call Trace: [ 30.312305] [ 30.312522] dump_stack_lvl+0x91/0xf0 [ 30.312903] print_report+0xcc/0x620 [ 30.313282] ? __virt_addr_valid+0x102/0x340 [ 30.313708] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.314193] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.314674] kasan_report+0xbe/0xf0 [ 30.315042] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.315528] vma_interval_tree_remove+0xc75/0xec0 [ 30.316009] vma_prepare+0xc54/0x11a0 [ 30.316379] __split_vma+0x5af/0x950 [ 30.316743] ? __pfx___split_vma+0x10/0x10 [ 30.317147] ? find_held_lock+0x2c/0x110 [ 30.317559] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.317996] ? lock_is_held_type+0x9f/0x120 [ 30.318416] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.318891] ? mtree_range_walk+0x632/0x900 [ 30.319322] ? mas_walk+0x5c7/0x7c0 [ 30.319713] do_vmi_munmap+0x1f1/0x2b0 [ 30.320094] mmap_region+0x1f9/0x2660 [ 30.320388] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.320687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.321117] ? __pfx_lock_acquire+0x10/0x10 [ 30.321429] ? __pfx_mmap_region+0x10/0x10 [ 30.321743] ? security_mmap_addr+0x7d/0xa0 [ 30.322062] ? get_unmapped_area+0x1f5/0x3f0 [ 30.322379] do_mmap+0x854/0xf00 [ 30.322638] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.322930] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.323256] ksys_mmap_pgoff+0x3af/0x500 [ 30.323566] do_syscall_64+0x3f/0x90 [ 30.323846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.324226] RIP: 0033:0x7f09dd334d82 [ 30.324499] 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 [ 30.325763] RSP: 002b:00007ffc76776388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.326293] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09dd334d82 [ 30.326807] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09dc76e000 [ 30.327306] RBP: 00007f09dc76e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.327809] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acfa098b20 [ 30.328310] R13: 00007ffc767763a0 R14: 00007ffc767763d0 R15: 00007ffc76776730 [ 30.328823] [ 30.328998] [ 30.329121] Allocated by task 212: [ 30.329373] kasan_save_stack+0x22/0x50 [ 30.329677] kasan_set_track+0x25/0x30 [ 30.329977] __kasan_slab_alloc+0x59/0x70 [ 30.330282] kmem_cache_alloc+0x16b/0x370 [ 30.330588] vm_area_dup+0x20/0x160 [ 30.330857] __split_vma+0x170/0x950 [ 30.331140] split_vma+0xc6/0x110 [ 30.331390] mprotect_fixup+0x8d2/0xb30 [ 30.331698] do_mprotect_pkey+0x87e/0xd40 [ 30.332000] __x64_sys_mprotect+0x78/0xc0 [ 30.332300] do_syscall_64+0x3f/0x90 [ 30.332580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.332952] [ 30.333074] Freed by task 212: [ 30.333302] kasan_save_stack+0x22/0x50 [ 30.333600] kasan_set_track+0x25/0x30 [ 30.333889] kasan_save_free_info+0x2b/0x50 [ 30.334210] __kasan_slab_free+0x10a/0x190 [ 30.334520] kmem_cache_free+0x10d/0x4d0 [ 30.334813] rcu_core+0x8c8/0x2860 [ 30.335077] __do_softirq+0x1b7/0x7d4 [ 30.335366] [ 30.335494] Last potentially related work creation: [ 30.335850] kasan_save_stack+0x22/0x50 [ 30.336142] __kasan_record_aux_stack+0x8e/0xa0 [ 30.336485] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.336859] remove_vma+0x139/0x170 [ 30.337124] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.337451] do_vmi_munmap+0x1f1/0x2b0 [ 30.337738] __vm_munmap+0x138/0x3a0 [ 30.338012] __x64_sys_munmap+0x59/0x80 [ 30.338303] do_syscall_64+0x3f/0x90 [ 30.338582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.338967] [ 30.339096] The buggy address belongs to the object at ffff88800cbb9740 [ 30.339096] which belongs to the cache vm_area_struct of size 168 [ 30.339976] The buggy address is located 88 bytes inside of [ 30.339976] freed 168-byte region [ffff88800cbb9740, ffff88800cbb97e8) [ 30.340810] [ 30.340931] The buggy address belongs to the physical page: [ 30.341331] page:000000001b85a283 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbb9 [ 30.341981] memcg:ffff8880167a9a01 [ 30.342228] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.342613] page_type: 0xffffffff() [ 30.342880] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.343437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167a9a01 [ 30.343987] page dumped because: kasan: bad access detected [ 30.344403] [ 30.344527] Memory state around the buggy address: [ 30.344844] ffff88800cbb9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.345308] ffff88800cbb9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.345768] >ffff88800cbb9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.346231] ^ [ 30.346497] ffff88800cbb9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.346959] ffff88800cbb9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.347419] ================================================================== [ 30.347923] Disabling lock debugging due to kernel taint [ 32.325667] BUG: Bad rss-counter state mm:000000009da3a6d6 type:MM_FILEPAGES val:33 [ 32.326674] BUG: Bad rss-counter state mm:000000009da3a6d6 type:MM_ANONPAGES val:22 [ 32.754338] BUG: Bad rss-counter state mm:00000000c882c5ce type:MM_FILEPAGES val:33 [ 32.755626] BUG: Bad rss-counter state mm:00000000c882c5ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4495' (ECDSA) to the list of known hosts. 2023/06/20 18:48:09 fuzzer started 2023/06/20 18:48:09 dialing manager at localhost:36067 2023/06/20 18:48:09 checking machine... 2023/06/20 18:48:09 checking revisions... [ 33.483221] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:48:09 testing simple program... [ 33.538264] cgroup: Unknown subsys name 'net' [ 33.593512] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:48:08 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff83640ecf RDX=000000000002640e RSI=000000000002640e RDI=ffffffff86582a28 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a89d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113078b 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 00007fc9c2aed900 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=00007fc9c1eeb820 CR3=000000000d87e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=2edca0fbef8a184e00000000000ae988 XMM05=44a197de3b9b327f0000000000132f68 XMM06=806171799158d9670000000000131d58 XMM07=fb795ef6d65770560000000000121dd8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=000000000000000f RCX=0000000080000000 RDX=ffff88800cb60800 RSI=ffffffff844a4e91 RDI=ffff88800cb608f8 RBP=ffff88800cb60808 RSP=ffff888018d97ce0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000009 R14=00007fa9272bb000 R15=ffffffffffffffff RIP=ffffffff814c0871 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa92671b900 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=00007ffc87847000 CR3=000000000feb8000 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=00000000000000000000000000000000 XMM02=7411000541bc2d55283378486b5a7954 XMM03=acd3413bf3d40f43862d0f61e8807d86 XMM04=035f8a62cdaa9c7ad5ee0fa29cc5b5c3 XMM05=0000ff00000000000000000000000000 XMM06=035f413bcdaa0f43862d0f619c807d86 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000