syzkaller login: [ 28.637686] BUG: Bad rss-counter state mm:00000000b945b45a type:MM_FILEPAGES val:33 [ 28.638507] BUG: Bad rss-counter state mm:00000000b945b45a type:MM_ANONPAGES val:22 [ 28.773705] ================================================================== [ 28.774388] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.775122] Read of size 8 at addr ffff8880167c9880 by task sshd/223 [ 28.775724] [ 28.776056] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.776721] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.777471] Call Trace: [ 28.777719] [ 28.777942] dump_stack_lvl+0x91/0xf0 [ 28.778317] print_report+0xcc/0x620 [ 28.778699] ? __virt_addr_valid+0x102/0x340 [ 28.779127] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.779615] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.780090] kasan_report+0xbe/0xf0 [ 28.780464] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.780954] vma_interval_tree_remove+0xc75/0xec0 [ 28.781832] vma_prepare+0xc54/0x11a0 [ 28.782501] __split_vma+0x5af/0x950 [ 28.783147] ? __pfx___split_vma+0x10/0x10 [ 28.783906] ? find_held_lock+0x2c/0x110 [ 28.784622] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.785399] ? lock_is_held_type+0x9f/0x120 [ 28.786142] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.786971] ? mtree_range_walk+0x632/0x900 [ 28.787740] ? mas_walk+0x5c7/0x7c0 [ 28.788401] do_vmi_munmap+0x1f1/0x2b0 [ 28.789082] mmap_region+0x1f9/0x2660 [ 28.789744] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.790438] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.791344] ? __pfx_lock_acquire+0x10/0x10 [ 28.791986] ? __pfx_mmap_region+0x10/0x10 [ 28.792622] ? security_mmap_addr+0x7d/0xa0 [ 28.793266] ? get_unmapped_area+0x1f5/0x3f0 [ 28.793921] do_mmap+0x854/0xf00 [ 28.794376] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.794888] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.795471] ksys_mmap_pgoff+0x3af/0x500 [ 28.795989] do_syscall_64+0x3f/0x90 [ 28.796481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.797135] RIP: 0033:0x7f8601a75d82 [ 28.797612] 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 [ 28.799813] RSP: 002b:00007ffeee2b9508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.800745] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8601a75d82 [ 28.801622] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8600eaf000 [ 28.802489] RBP: 00007f8600eaf000 R08: 0000000000000009 R09: 0000000000001000 [ 28.803451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df1971eec0 [ 28.804367] R13: 00007ffeee2b9520 R14: 00007ffeee2b9550 R15: 00007ffeee2b98b0 [ 28.805252] [ 28.805552] [ 28.805773] Allocated by task 213: [ 28.806214] kasan_save_stack+0x22/0x50 [ 28.806746] kasan_set_track+0x25/0x30 [ 28.807253] __kasan_slab_alloc+0x59/0x70 [ 28.807813] kmem_cache_alloc+0x16b/0x370 [ 28.808347] vm_area_dup+0x20/0x160 [ 28.808820] __split_vma+0x170/0x950 [ 28.809304] split_vma+0xc6/0x110 [ 28.809769] mprotect_fixup+0x8d2/0xb30 [ 28.810293] do_mprotect_pkey+0x87e/0xd40 [ 28.810838] __x64_sys_mprotect+0x78/0xc0 [ 28.811405] do_syscall_64+0x3f/0x90 [ 28.811900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.812573] [ 28.812798] Freed by task 213: [ 28.813208] kasan_save_stack+0x22/0x50 [ 28.813731] kasan_set_track+0x25/0x30 [ 28.814246] kasan_save_free_info+0x2b/0x50 [ 28.814807] __kasan_slab_free+0x10a/0x190 [ 28.815371] kmem_cache_free+0x10d/0x4d0 [ 28.815912] rcu_core+0x8c8/0x2860 [ 28.816382] __do_softirq+0x1b7/0x7d4 [ 28.816886] [ 28.817114] Last potentially related work creation: [ 28.817725] kasan_save_stack+0x22/0x50 [ 28.818253] __kasan_record_aux_stack+0x8e/0xa0 [ 28.818854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.819553] remove_vma+0x139/0x170 [ 28.820028] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.820612] do_vmi_munmap+0x1f1/0x2b0 [ 28.821117] __vm_munmap+0x138/0x3a0 [ 28.821608] __x64_sys_munmap+0x59/0x80 [ 28.822128] do_syscall_64+0x3f/0x90 [ 28.822626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.823311] [ 28.823536] The buggy address belongs to the object at ffff8880167c9828 [ 28.823536] which belongs to the cache vm_area_struct of size 168 [ 28.825125] The buggy address is located 88 bytes inside of [ 28.825125] freed 168-byte region [ffff8880167c9828, ffff8880167c98d0) [ 28.826624] [ 28.826850] The buggy address belongs to the physical page: [ 28.827552] page:000000004eccede8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167c9 [ 28.828709] memcg:ffff88800fc9ed01 [ 28.829156] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.829836] page_type: 0xffffffff() [ 28.830314] raw: 0100000000000200 ffff8880087a0c80 ffffea0000619d80 dead000000000004 [ 28.831315] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc9ed01 [ 28.832285] page dumped because: kasan: bad access detected [ 28.832997] [ 28.833228] Memory state around the buggy address: [ 28.833855] ffff8880167c9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.834783] ffff8880167c9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.835708] >ffff8880167c9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.836625] ^ [ 28.837072] ffff8880167c9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.838007] ffff8880167c9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 28.838943] ================================================================== [ 28.840157] Disabling lock debugging due to kernel taint [ 31.478711] BUG: Bad rss-counter state mm:0000000033cac6f3 type:MM_FILEPAGES val:33 [ 31.479824] BUG: Bad rss-counter state mm:0000000033cac6f3 type:MM_ANONPAGES val:22 [ 32.035895] BUG: Bad rss-counter state mm:00000000bce346c6 type:MM_FILEPAGES val:33 [ 32.037097] BUG: Bad rss-counter state mm:00000000bce346c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10071' (ECDSA) to the list of known hosts. 2023/06/20 18:42:12 fuzzer started 2023/06/20 18:42:12 dialing manager at localhost:36067 2023/06/20 18:42:12 checking machine... 2023/06/20 18:42:12 checking revisions... [ 32.660989] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:42:12 testing simple program... [ 32.703044] cgroup: Unknown subsys name 'net' [ 32.741423] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:42:11 Registers: info registers vcpu 0 RAX=1ffff110012dab8f RBX=ffff8880096d5c48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880096d5c78 RBP=ffff88801b859e80 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88801b8679c0 R14=ffffffff818d9c06 R15=ffff88800d993180 RIP=ffffffff818464e2 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 00007f697dcec900 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=00007f697e2a3618 CR3=000000000e800000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f279338a000 CR3=000000000d80a000 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=aebf28490ff72fa6214928bac21f4c3f XMM02=000000000011d4d0eff9b2d0a8fce9cb XMM03=000000000011d5a02c67c8bc2e329bc3 XMM04=e0ed4d7e6314552a00000000000ae988 XMM05=59d5b690e0af863b0000000000131ae0 XMM06=8b08c4cd983ee7ab0000000000130948 XMM07=e042d86d42eb936e0000000000121790 XMM08=124a94025e16f656000000000011d5a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000