syzkaller login: [ 31.008383] BUG: Bad rss-counter state mm:00000000bcae683d type:MM_FILEPAGES val:33 [ 31.009570] BUG: Bad rss-counter state mm:00000000bcae683d type:MM_ANONPAGES val:22 [ 31.048576] ================================================================== [ 31.049662] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.050723] Read of size 8 at addr ffff888019d155c8 by task sshd/221 [ 31.051592] [ 31.051919] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.052872] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.053955] Call Trace: [ 31.054352] [ 31.054666] dump_stack_lvl+0x91/0xf0 [ 31.055272] print_report+0xcc/0x620 [ 31.055824] ? __virt_addr_valid+0x102/0x340 [ 31.056394] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.057060] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.057717] kasan_report+0xbe/0xf0 [ 31.058261] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.058896] vma_interval_tree_remove+0xc75/0xec0 [ 31.059494] vma_prepare+0xc54/0x11a0 [ 31.059968] __split_vma+0x5af/0x950 [ 31.060436] ? __pfx___split_vma+0x10/0x10 [ 31.060977] ? find_held_lock+0x2c/0x110 [ 31.061496] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.062067] ? lock_is_held_type+0x9f/0x120 [ 31.062625] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.063224] ? mtree_range_walk+0x632/0x900 [ 31.063777] ? mas_walk+0x5c7/0x7c0 [ 31.064250] do_vmi_munmap+0x1f1/0x2b0 [ 31.064737] mmap_region+0x1f9/0x2660 [ 31.065221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.065735] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.066456] ? __pfx_lock_acquire+0x10/0x10 [ 31.066999] ? __pfx_mmap_region+0x10/0x10 [ 31.067527] ? security_mmap_addr+0x7d/0xa0 [ 31.068065] ? get_unmapped_area+0x1f5/0x3f0 [ 31.068620] do_mmap+0x854/0xf00 [ 31.069060] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.069550] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.070113] ksys_mmap_pgoff+0x3af/0x500 [ 31.070633] do_syscall_64+0x3f/0x90 [ 31.071115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.071761] RIP: 0033:0x7f2d70082d82 [ 31.072230] 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 [ 31.074376] RSP: 002b:00007fff1315e108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.075300] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d70082d82 [ 31.076145] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d6f4bc000 [ 31.076997] RBP: 00007f2d6f4bc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.077846] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ea4cd1980 [ 31.078692] R13: 00007fff1315e120 R14: 00007fff1315e150 R15: 00007fff1315e4b0 [ 31.079563] [ 31.079868] [ 31.080087] Allocated by task 214: [ 31.080517] kasan_save_stack+0x22/0x50 [ 31.081027] kasan_set_track+0x25/0x30 [ 31.081521] __kasan_slab_alloc+0x59/0x70 [ 31.082053] kmem_cache_alloc+0x16b/0x370 [ 31.082583] vm_area_dup+0x20/0x160 [ 31.083041] __split_vma+0x170/0x950 [ 31.083514] split_vma+0xc6/0x110 [ 31.083951] mprotect_fixup+0x8d2/0xb30 [ 31.084453] do_mprotect_pkey+0x87e/0xd40 [ 31.084975] __x64_sys_mprotect+0x78/0xc0 [ 31.085501] do_syscall_64+0x3f/0x90 [ 31.085982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086641] [ 31.086857] Freed by task 214: [ 31.087247] kasan_save_stack+0x22/0x50 [ 31.087750] kasan_set_track+0x25/0x30 [ 31.088242] kasan_save_free_info+0x2b/0x50 [ 31.088771] __kasan_slab_free+0x10a/0x190 [ 31.089304] kmem_cache_free+0x10d/0x4d0 [ 31.089815] rcu_core+0x8c8/0x2860 [ 31.090256] __do_softirq+0x1b7/0x7d4 [ 31.090741] [ 31.090959] Last potentially related work creation: [ 31.091552] kasan_save_stack+0x22/0x50 [ 31.092059] __kasan_record_aux_stack+0x8e/0xa0 [ 31.092634] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.093318] remove_vma+0x139/0x170 [ 31.093778] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.094345] do_vmi_munmap+0x1f1/0x2b0 [ 31.094854] __vm_munmap+0x138/0x3a0 [ 31.095319] __x64_sys_munmap+0x59/0x80 [ 31.095819] do_syscall_64+0x3f/0x90 [ 31.096296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.096942] [ 31.097159] The buggy address belongs to the object at ffff888019d15570 [ 31.097159] which belongs to the cache vm_area_struct of size 168 [ 31.098648] The buggy address is located 88 bytes inside of [ 31.098648] freed 168-byte region [ffff888019d15570, ffff888019d15618) [ 31.100067] [ 31.100285] The buggy address belongs to the physical page: [ 31.100957] page:00000000c409e5e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d15 [ 31.102056] memcg:ffff888016792a01 [ 31.102512] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.103164] page_type: 0xffffffff() [ 31.103624] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.104538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016792a01 [ 31.105458] page dumped because: kasan: bad access detected [ 31.106133] [ 31.106353] Memory state around the buggy address: [ 31.106945] ffff888019d15480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.107805] ffff888019d15500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.108656] >ffff888019d15580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.109515] ^ [ 31.110183] ffff888019d15600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.111047] ffff888019d15680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.111906] ================================================================== [ 31.112892] Disabling lock debugging due to kernel taint [ 33.392366] BUG: Bad rss-counter state mm:000000009d8a8d3c type:MM_FILEPAGES val:33 [ 33.393373] BUG: Bad rss-counter state mm:000000009d8a8d3c type:MM_ANONPAGES val:22 [ 33.794817] BUG: Bad rss-counter state mm:0000000027d30ffb type:MM_FILEPAGES val:33 [ 33.796305] BUG: Bad rss-counter state mm:0000000027d30ffb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15829' (ECDSA) to the list of known hosts. 2023/06/21 03:45:19 fuzzer started 2023/06/21 03:45:19 dialing manager at localhost:36067 2023/06/21 03:45:19 checking machine... 2023/06/21 03:45:19 checking revisions... [ 34.491808] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:45:20 testing simple program... [ 34.524600] cgroup: Unknown subsys name 'net' [ 34.586574] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:45:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f0ccaba8a70 CR3=000000000d840000 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=94a46eda12a0db829d488b367d4b22f4 XMM02=000000000011ccb8ec2efd57dc4c00df XMM03=0000000000121380ee17fffaad3bd2e8 XMM04=6cd79d52791d77c000000000000ae988 XMM05=e4cb8bb95a7664b600000000001311b8 XMM06=c291bd5c70af25b90000000000131040 XMM07=e042d86d42eb936e0000000000121600 XMM08=ee17fffaad3bd2e8000000000011cd18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016b90001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016b8f001 RSI=ffff888016b8f090 RDI=ffff888016b8ece8 RBP=ffff888016b8ed30 RSP=ffff888016b8ec68 R8 =ffffffff860d258a R9 =ffff888016b8ed18 R10=0000000000038001 R11=000000000000fc0c R12=ffff888016b8ed38 R13=ffff888016b8ed20 R14=ffff888016b8f098 R15=ffff888016b8ecd8 RIP=ffffffff81131039 RFL=00000202 [-------] 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 00007efe9f174900 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=00007efe9f13e008 CR3=000000001a19a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000