syzkaller login: [ 30.692775] BUG: Bad rss-counter state mm:00000000bb4a3190 type:MM_FILEPAGES val:33 [ 30.693996] BUG: Bad rss-counter state mm:00000000bb4a3190 type:MM_ANONPAGES val:22 [ 30.734066] ================================================================== [ 30.735207] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.736233] Read of size 8 at addr ffff88801a15e6b0 by task sshd/220 [ 30.736995] [ 30.737211] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.738290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.739487] Call Trace: [ 30.739811] [ 30.740102] dump_stack_lvl+0x91/0xf0 [ 30.740596] print_report+0xcc/0x620 [ 30.741102] ? __virt_addr_valid+0x102/0x340 [ 30.741676] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742290] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742913] kasan_report+0xbe/0xf0 [ 30.743438] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744078] vma_interval_tree_remove+0xc75/0xec0 [ 30.744673] vma_prepare+0xc54/0x11a0 [ 30.745154] __split_vma+0x5af/0x950 [ 30.745646] ? __pfx___split_vma+0x10/0x10 [ 30.746203] ? find_held_lock+0x2c/0x110 [ 30.746725] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.747293] ? lock_is_held_type+0x9f/0x120 [ 30.747843] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.748443] ? mtree_range_walk+0x632/0x900 [ 30.749016] ? mas_walk+0x5c7/0x7c0 [ 30.749490] do_vmi_munmap+0x1f1/0x2b0 [ 30.749978] mmap_region+0x1f9/0x2660 [ 30.750463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.750997] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.751737] ? __pfx_lock_acquire+0x10/0x10 [ 30.752289] ? __pfx_mmap_region+0x10/0x10 [ 30.752829] ? security_mmap_addr+0x7d/0xa0 [ 30.753358] ? get_unmapped_area+0x1f5/0x3f0 [ 30.753905] do_mmap+0x854/0xf00 [ 30.754342] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.754832] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.755414] ksys_mmap_pgoff+0x3af/0x500 [ 30.755919] do_syscall_64+0x3f/0x90 [ 30.756394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757039] RIP: 0033:0x7f235ea59d82 [ 30.757501] 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 [ 30.759639] RSP: 002b:00007ffccfdfe3f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.760555] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f235ea59d82 [ 30.761399] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f235de93000 [ 30.762248] RBP: 00007f235de93000 R08: 0000000000000009 R09: 0000000000001000 [ 30.763097] R10: 0000000000000812 R11: 0000000000000206 R12: 000056508d1b9ec0 [ 30.763942] R13: 00007ffccfdfe410 R14: 00007ffccfdfe440 R15: 00007ffccfdfe7a0 [ 30.764806] [ 30.765096] [ 30.765310] Allocated by task 213: [ 30.765742] kasan_save_stack+0x22/0x50 [ 30.766249] kasan_set_track+0x25/0x30 [ 30.766745] __kasan_slab_alloc+0x59/0x70 [ 30.767292] kmem_cache_alloc+0x16b/0x370 [ 30.767807] vm_area_dup+0x20/0x160 [ 30.768261] __split_vma+0x170/0x950 [ 30.768724] split_vma+0xc6/0x110 [ 30.769165] mprotect_fixup+0x8d2/0xb30 [ 30.769665] do_mprotect_pkey+0x87e/0xd40 [ 30.770180] __x64_sys_mprotect+0x78/0xc0 [ 30.770698] do_syscall_64+0x3f/0x90 [ 30.771179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.771820] [ 30.772036] Freed by task 203: [ 30.772423] kasan_save_stack+0x22/0x50 [ 30.772922] kasan_set_track+0x25/0x30 [ 30.773410] kasan_save_free_info+0x2b/0x50 [ 30.773936] __kasan_slab_free+0x10a/0x190 [ 30.774463] kmem_cache_free+0x10d/0x4d0 [ 30.774971] rcu_core+0x8c8/0x2860 [ 30.775440] __do_softirq+0x1b7/0x7d4 [ 30.775913] [ 30.776129] Last potentially related work creation: [ 30.776714] kasan_save_stack+0x22/0x50 [ 30.777215] __kasan_record_aux_stack+0x8e/0xa0 [ 30.777789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.778425] remove_vma+0x139/0x170 [ 30.778879] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.779468] do_vmi_munmap+0x1f1/0x2b0 [ 30.779953] __vm_munmap+0x138/0x3a0 [ 30.780414] __x64_sys_munmap+0x59/0x80 [ 30.780918] do_syscall_64+0x3f/0x90 [ 30.781392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782034] [ 30.782252] The buggy address belongs to the object at ffff88801a15e658 [ 30.782252] which belongs to the cache vm_area_struct of size 168 [ 30.783737] The buggy address is located 88 bytes inside of [ 30.783737] freed 168-byte region [ffff88801a15e658, ffff88801a15e700) [ 30.785136] [ 30.785353] The buggy address belongs to the physical page: [ 30.786011] page:00000000f8012565 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a15e [ 30.787114] memcg:ffff88800b888401 [ 30.787558] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.788231] page_type: 0xffffffff() [ 30.788676] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.789590] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b888401 [ 30.790488] page dumped because: kasan: bad access detected [ 30.791172] [ 30.791387] Memory state around the buggy address: [ 30.792000] ffff88801a15e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.792857] ffff88801a15e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.793709] >ffff88801a15e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.794545] ^ [ 30.795160] ffff88801a15e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.796063] ffff88801a15e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.796968] ================================================================== [ 30.798021] Disabling lock debugging due to kernel taint [ 33.019091] BUG: Bad rss-counter state mm:00000000d909d08a type:MM_FILEPAGES val:33 [ 33.020491] BUG: Bad rss-counter state mm:00000000d909d08a type:MM_ANONPAGES val:22 [ 33.399828] BUG: Bad rss-counter state mm:000000006126c23f type:MM_FILEPAGES val:33 [ 33.400817] BUG: Bad rss-counter state mm:000000006126c23f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32601' (ECDSA) to the list of known hosts. 2023/06/20 23:22:23 fuzzer started 2023/06/20 23:22:23 dialing manager at localhost:36067 2023/06/20 23:22:23 checking machine... 2023/06/20 23:22:23 checking revisions... [ 34.166829] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:22:24 testing simple program... [ 34.220842] cgroup: Unknown subsys name 'net' [ 34.277151] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:22:23 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88807ffd7010 RCX=ffffffff811432de RDX=ffff88800efe51c0 RSI=0000000000000000 RDI=0000000000000007 RBP=000000000fcc3ec0 RSP=ffff888015c77828 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000008 R14=0000000000000002 R15=ffff88800dbeaf00 RIP=ffffffff814c0261 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 00007f783f746900 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=00007f138875d650 CR3=000000000c99a000 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=c96136b295e01aa1c9461866ed4dc7d9 XMM02=ec2efd57dc4c00df000000000011ba48 XMM03=76bb798cc0fe7a6d000000000011bb18 XMM04=782c0fd0c435284500000000000ae988 XMM05=7de82a238b70b5100000000000133b78 XMM06=19e9129bd510f2350000000000132a30 XMM07=fb795ef6d65770560000000000122c68 XMM08=2c67c8bc2e329bc3000000000011bab8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801845b680 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f2ef308 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=00000000000128c0 RIP=ffffffff813744b6 RFL=00000293 [--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 00007f13881a8900 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=00007f138875f618 CR3=00000000097a4000 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