syzkaller login: [ 37.702092] BUG: Bad rss-counter state mm:00000000ea03a07f type:MM_FILEPAGES val:33 [ 37.703281] BUG: Bad rss-counter state mm:00000000ea03a07f type:MM_ANONPAGES val:22 [ 37.863752] ================================================================== [ 37.864845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.865962] Read of size 8 at addr ffff88800e778310 by task sshd/221 [ 37.867023] [ 37.867288] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.868335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.869525] Call Trace: [ 37.869848] [ 37.870133] dump_stack_lvl+0x91/0xf0 [ 37.870623] print_report+0xcc/0x620 [ 37.871114] ? __virt_addr_valid+0x102/0x340 [ 37.871689] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.872322] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.872973] kasan_report+0xbe/0xf0 [ 37.873478] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.874138] vma_interval_tree_remove+0xc75/0xec0 [ 37.874779] vma_prepare+0xc54/0x11a0 [ 37.875291] __split_vma+0x5af/0x950 [ 37.875792] ? __pfx___split_vma+0x10/0x10 [ 37.876361] ? find_held_lock+0x2c/0x110 [ 37.876916] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.877512] ? lock_is_held_type+0x9f/0x120 [ 37.878086] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.878732] ? mtree_range_walk+0x632/0x900 [ 37.879321] ? mas_walk+0x5c7/0x7c0 [ 37.879817] do_vmi_munmap+0x1f1/0x2b0 [ 37.880365] mmap_region+0x1f9/0x2660 [ 37.880871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.881423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.882186] ? __pfx_lock_acquire+0x10/0x10 [ 37.882758] ? __pfx_mmap_region+0x10/0x10 [ 37.883326] ? security_mmap_addr+0x7d/0xa0 [ 37.883888] ? get_unmapped_area+0x1f5/0x3f0 [ 37.884483] do_mmap+0x854/0xf00 [ 37.884951] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.885472] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.886068] ksys_mmap_pgoff+0x3af/0x500 [ 37.886611] do_syscall_64+0x3f/0x90 [ 37.887122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.887806] RIP: 0033:0x7f14afe09d82 [ 37.888302] 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 [ 37.890572] RSP: 002b:00007ffda2e43ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.891537] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f14afe09d82 [ 37.892456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f14af243000 [ 37.893354] RBP: 00007f14af243000 R08: 0000000000000009 R09: 0000000000001000 [ 37.894266] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2eb95eec0 [ 37.895185] R13: 00007ffda2e43ee0 R14: 00007ffda2e43f10 R15: 00007ffda2e44270 [ 37.896109] [ 37.896422] [ 37.896647] Allocated by task 214: [ 37.897113] kasan_save_stack+0x22/0x50 [ 37.897622] kasan_set_track+0x25/0x30 [ 37.898120] __kasan_slab_alloc+0x59/0x70 [ 37.898652] kmem_cache_alloc+0x16b/0x370 [ 37.899171] vm_area_dup+0x20/0x160 [ 37.899628] __split_vma+0x170/0x950 [ 37.900112] split_vma+0xc6/0x110 [ 37.900552] mprotect_fixup+0x8d2/0xb30 [ 37.901061] do_mprotect_pkey+0x87e/0xd40 [ 37.901580] __x64_sys_mprotect+0x78/0xc0 [ 37.902106] do_syscall_64+0x3f/0x90 [ 37.902582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.903224] [ 37.903437] Freed by task 13: [ 37.903830] kasan_save_stack+0x22/0x50 [ 37.904348] kasan_set_track+0x25/0x30 [ 37.904855] kasan_save_free_info+0x2b/0x50 [ 37.905398] __kasan_slab_free+0x10a/0x190 [ 37.905935] kmem_cache_free+0x10d/0x4d0 [ 37.906455] rcu_core+0x8c8/0x2860 [ 37.906917] __do_softirq+0x1b7/0x7d4 [ 37.907404] [ 37.907623] Last potentially related work creation: [ 37.908294] kasan_save_stack+0x22/0x50 [ 37.908804] __kasan_record_aux_stack+0x8e/0xa0 [ 37.909392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.910054] remove_vma+0x139/0x170 [ 37.910525] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.911103] do_vmi_munmap+0x1f1/0x2b0 [ 37.911586] __vm_munmap+0x138/0x3a0 [ 37.912064] __x64_sys_munmap+0x59/0x80 [ 37.912585] do_syscall_64+0x3f/0x90 [ 37.913083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.913754] [ 37.913983] The buggy address belongs to the object at ffff88800e7782b8 [ 37.913983] which belongs to the cache vm_area_struct of size 168 [ 37.915540] The buggy address is located 88 bytes inside of [ 37.915540] freed 168-byte region [ffff88800e7782b8, ffff88800e778360) [ 37.917052] [ 37.917279] The buggy address belongs to the physical page: [ 37.917978] page:00000000f426c508 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe778 [ 37.919127] memcg:ffff888014700601 [ 37.919577] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.920264] page_type: 0xffffffff() [ 37.920739] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 37.921705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014700601 [ 37.922660] page dumped because: kasan: bad access detected [ 37.923361] [ 37.923590] Memory state around the buggy address: [ 37.924215] ffff88800e778200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 37.925123] ffff88800e778280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 37.926018] >ffff88800e778300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 37.926924] ^ [ 37.927409] ffff88800e778380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.928330] ffff88800e778400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 37.929231] ================================================================== [ 37.930306] Disabling lock debugging due to kernel taint [ 39.855883] BUG: Bad rss-counter state mm:0000000073e0d6fd type:MM_FILEPAGES val:33 [ 39.857062] BUG: Bad rss-counter state mm:0000000073e0d6fd type:MM_ANONPAGES val:22 [ 40.284914] BUG: Bad rss-counter state mm:00000000b62703a6 type:MM_FILEPAGES val:33 [ 40.286060] BUG: Bad rss-counter state mm:00000000b62703a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64162' (ECDSA) to the list of known hosts. 2023/06/19 21:09:58 fuzzer started 2023/06/19 21:09:58 dialing manager at localhost:44161 2023/06/19 21:09:58 checking machine... 2023/06/19 21:09:58 checking revisions... [ 40.924006] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:09:58 testing simple program... [ 40.982231] cgroup: Unknown subsys name 'net' [ 41.016061] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:09:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f6b51c0 RSI=ffffffff81f17572 RDI=ffff88800b5f0cd0 RBP=ffff88800b5f0c98 RSP=ffff88800ed9f820 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000080 R11=0000000000000001 R12=ffff88800ff97ad8 R13=0000000000000000 R14=1ffff11001db3f0d R15=0000000000000000 RIP=ffffffff814c07eb RFL=00000286 [--S--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 00007f29e0d75900 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=00007f29e132a650 CR3=000000000b8c0000 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=ffff888014676000 RCX=0000000000000000 RDX=1ffff110011efad3 RSI=ffffffff838741fe RDI=0000000000000005 RBP=ffff888008f7d000 RSP=ffff88800ed9fb18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff888008f7d698 R13=ffff88800d69ab40 R14=0000000000000001 R15=ffff888008f7d504 RIP=ffffffff83874228 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 00007f29e0d75900 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=00007f29e132c618 CR3=000000000b8c0000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000