syzkaller login: [ 42.092182] BUG: Bad rss-counter state mm:00000000ae61c375 type:MM_FILEPAGES val:33 [ 42.093415] BUG: Bad rss-counter state mm:00000000ae61c375 type:MM_ANONPAGES val:22 [ 42.253735] ================================================================== [ 42.254681] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.255618] Read of size 8 at addr ffff88800cb96058 by task sshd/218 [ 42.256397] [ 42.256612] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.257656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.258645] Call Trace: [ 42.258985] [ 42.259287] dump_stack_lvl+0x91/0xf0 [ 42.259795] print_report+0xcc/0x620 [ 42.260291] ? __virt_addr_valid+0x102/0x340 [ 42.260841] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.261470] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.262095] kasan_report+0xbe/0xf0 [ 42.262572] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.263194] vma_interval_tree_remove+0xc75/0xec0 [ 42.263801] vma_prepare+0xc54/0x11a0 [ 42.264294] __split_vma+0x5af/0x950 [ 42.264774] ? __pfx___split_vma+0x10/0x10 [ 42.265310] ? find_held_lock+0x2c/0x110 [ 42.265825] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.266384] ? lock_is_held_type+0x9f/0x120 [ 42.266923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.267533] ? mtree_range_walk+0x632/0x900 [ 42.268113] ? mas_walk+0x5c7/0x7c0 [ 42.268591] do_vmi_munmap+0x1f1/0x2b0 [ 42.269081] mmap_region+0x1f9/0x2660 [ 42.269572] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.270081] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.270785] ? __pfx_lock_acquire+0x10/0x10 [ 42.271318] ? __pfx_mmap_region+0x10/0x10 [ 42.271852] ? security_mmap_addr+0x7d/0xa0 [ 42.272393] ? get_unmapped_area+0x1f5/0x3f0 [ 42.272951] do_mmap+0x854/0xf00 [ 42.273387] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.273877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.274447] ksys_mmap_pgoff+0x3af/0x500 [ 42.274946] do_syscall_64+0x3f/0x90 [ 42.275420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.276072] RIP: 0033:0x7f83f8ee5d82 [ 42.276526] 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 [ 42.278634] RSP: 002b:00007fff86436198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.279537] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83f8ee5d82 [ 42.280386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83f831f000 [ 42.281222] RBP: 00007f83f831f000 R08: 0000000000000009 R09: 0000000000001000 [ 42.282062] R10: 0000000000000812 R11: 0000000000000206 R12: 000055945831cb20 [ 42.282896] R13: 00007fff864361b0 R14: 00007fff864361e0 R15: 00007fff86436540 [ 42.283748] [ 42.284045] [ 42.284258] Allocated by task 211: [ 42.284685] kasan_save_stack+0x22/0x50 [ 42.285196] kasan_set_track+0x25/0x30 [ 42.285688] __kasan_slab_alloc+0x59/0x70 [ 42.286214] kmem_cache_alloc+0x16b/0x370 [ 42.286735] vm_area_dup+0x20/0x160 [ 42.287194] __split_vma+0x170/0x950 [ 42.287669] split_vma+0xc6/0x110 [ 42.288122] mprotect_fixup+0x8d2/0xb30 [ 42.288628] do_mprotect_pkey+0x87e/0xd40 [ 42.289153] __x64_sys_mprotect+0x78/0xc0 [ 42.289673] do_syscall_64+0x3f/0x90 [ 42.290145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.290782] [ 42.290998] Freed by task 211: [ 42.291388] kasan_save_stack+0x22/0x50 [ 42.291892] kasan_set_track+0x25/0x30 [ 42.292406] kasan_save_free_info+0x2b/0x50 [ 42.292935] __kasan_slab_free+0x10a/0x190 [ 42.293461] kmem_cache_free+0x10d/0x4d0 [ 42.293966] rcu_core+0x8c8/0x2860 [ 42.294410] __do_softirq+0x1b7/0x7d4 [ 42.294882] [ 42.295098] Last potentially related work creation: [ 42.295679] kasan_save_stack+0x22/0x50 [ 42.296192] __kasan_record_aux_stack+0x8e/0xa0 [ 42.296766] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.297421] remove_vma+0x139/0x170 [ 42.297874] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.298496] do_vmi_munmap+0x1f1/0x2b0 [ 42.299020] __vm_munmap+0x138/0x3a0 [ 42.299484] __x64_sys_munmap+0x59/0x80 [ 42.299971] do_syscall_64+0x3f/0x90 [ 42.300469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.301124] [ 42.301344] Second to last potentially related work creation: [ 42.302033] kasan_save_stack+0x22/0x50 [ 42.302543] __kasan_record_aux_stack+0x8e/0xa0 [ 42.303127] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.303784] remove_vma+0x139/0x170 [ 42.304250] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.304819] do_vmi_munmap+0x1f1/0x2b0 [ 42.305320] __vm_munmap+0x138/0x3a0 [ 42.305795] __x64_sys_munmap+0x59/0x80 [ 42.306311] do_syscall_64+0x3f/0x90 [ 42.306786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.307452] [ 42.307669] The buggy address belongs to the object at ffff88800cb96000 [ 42.307669] which belongs to the cache vm_area_struct of size 168 [ 42.309167] The buggy address is located 88 bytes inside of [ 42.309167] freed 168-byte region [ffff88800cb96000, ffff88800cb960a8) [ 42.310598] [ 42.310830] The buggy address belongs to the physical page: [ 42.311518] page:000000007fd1bd14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb96 [ 42.312668] memcg:ffff88801449a601 [ 42.313116] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.313795] page_type: 0xffffffff() [ 42.314266] raw: 0100000000000200 ffff88800879fc80 ffffea00003b1440 dead000000000006 [ 42.315223] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801449a601 [ 42.316187] page dumped because: kasan: bad access detected [ 42.316878] [ 42.317102] Memory state around the buggy address: [ 42.317716] ffff88800cb95f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 42.318590] ffff88800cb95f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.319475] >ffff88800cb96000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.320344] ^ [ 42.321083] ffff88800cb96080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 42.321952] ffff88800cb96100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.322812] ================================================================== [ 42.323789] Disabling lock debugging due to kernel taint [ 44.589461] BUG: Bad rss-counter state mm:0000000099be1d6e type:MM_FILEPAGES val:33 [ 44.590610] BUG: Bad rss-counter state mm:0000000099be1d6e type:MM_ANONPAGES val:22 [ 45.113088] BUG: Bad rss-counter state mm:000000008661d728 type:MM_FILEPAGES val:33 [ 45.114727] BUG: Bad rss-counter state mm:000000008661d728 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38798' (ECDSA) to the list of known hosts. 2023/06/19 14:48:55 fuzzer started 2023/06/19 14:48:55 dialing manager at localhost:44161 2023/06/19 14:48:55 checking machine... 2023/06/19 14:48:55 checking revisions... [ 45.823231] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:48:55 testing simple program... [ 45.871492] cgroup: Unknown subsys name 'net' [ 45.918781] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:48:43 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88801ca176a8 RSP=ffff88801ca175e0 R8 =0000000000000001 R9 =ffffed1003942ec8 R10=ffff88801ca17647 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007fc8a1f98900 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=00007fc8a254d650 CR3=000000000e3ce000 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=0000000080000000 RBX=dffffc0000000000 RCX=0000000080000000 RDX=ffff8880095bb680 RSI=ffffffff815a2954 RDI=0000000000000006 RBP=ffff88800f4cfd28 RSP=ffff88800f4cfc58 R8 =0000000000000006 R9 =0000000000000101 R10=0000000000000035 R11=0000000000000000 R12=0000000000000035 R13=ffff88800f4cfd60 R14=0000000000000101 R15=ffffc9000068f250 RIP=ffffffff814c07f1 RFL=00000296 [--S-AP-] 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 00007ff691b71900 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=00007ff6910031e0 CR3=000000000d542000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=79773b7de44848ba00000000000ae988 XMM05=810ef34c2731faa70000000000136480 XMM06=751b9502027dc0b90000000000134fa8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000