syzkaller login: [ 50.875875] BUG: Bad rss-counter state mm:00000000a8affe47 type:MM_FILEPAGES val:33 [ 50.877686] BUG: Bad rss-counter state mm:00000000a8affe47 type:MM_ANONPAGES val:22 [ 51.043121] ================================================================== [ 51.044132] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.045200] Read of size 8 at addr ffff888019b89880 by task sshd/219 [ 51.045967] [ 51.046184] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.047054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.048068] Call Trace: [ 51.048385] [ 51.048673] dump_stack_lvl+0x91/0xf0 [ 51.049163] print_report+0xcc/0x620 [ 51.049651] ? __virt_addr_valid+0x102/0x340 [ 51.050204] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.050819] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.051447] kasan_report+0xbe/0xf0 [ 51.051930] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.052551] vma_interval_tree_remove+0xc75/0xec0 [ 51.053167] vma_prepare+0xc54/0x11a0 [ 51.053645] __split_vma+0x5af/0x950 [ 51.054116] ? __pfx___split_vma+0x10/0x10 [ 51.054643] ? find_held_lock+0x2c/0x110 [ 51.055158] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.055744] ? lock_is_held_type+0x9f/0x120 [ 51.056281] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.056883] ? mtree_range_walk+0x632/0x900 [ 51.057435] ? mas_walk+0x5c7/0x7c0 [ 51.057917] do_vmi_munmap+0x1f1/0x2b0 [ 51.058403] mmap_region+0x1f9/0x2660 [ 51.058891] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.059409] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.060115] ? __pfx_lock_acquire+0x10/0x10 [ 51.060653] ? __pfx_mmap_region+0x10/0x10 [ 51.061183] ? security_mmap_addr+0x7d/0xa0 [ 51.061709] ? get_unmapped_area+0x1f5/0x3f0 [ 51.062258] do_mmap+0x854/0xf00 [ 51.062696] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.063194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.063778] ksys_mmap_pgoff+0x3af/0x500 [ 51.064282] do_syscall_64+0x3f/0x90 [ 51.064754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.065393] RIP: 0033:0x7fe4e4b67d82 [ 51.065849] 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 [ 51.067979] RSP: 002b:00007ffecec8ac48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.068884] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe4e4b67d82 [ 51.069733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe4e3fa1000 [ 51.070566] RBP: 00007fe4e3fa1000 R08: 0000000000000009 R09: 0000000000001000 [ 51.071418] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1bc4fbec0 [ 51.072257] R13: 00007ffecec8ac60 R14: 00007ffecec8ac90 R15: 00007ffecec8aff0 [ 51.073116] [ 51.073406] [ 51.073618] Allocated by task 212: [ 51.074050] kasan_save_stack+0x22/0x50 [ 51.074551] kasan_set_track+0x25/0x30 [ 51.075054] __kasan_slab_alloc+0x59/0x70 [ 51.075598] kmem_cache_alloc+0x16b/0x370 [ 51.076112] vm_area_dup+0x20/0x160 [ 51.076564] __split_vma+0x170/0x950 [ 51.077034] split_vma+0xc6/0x110 [ 51.077472] mprotect_fixup+0x8d2/0xb30 [ 51.077978] do_mprotect_pkey+0x87e/0xd40 [ 51.078499] __x64_sys_mprotect+0x78/0xc0 [ 51.079021] do_syscall_64+0x3f/0x90 [ 51.079498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.080140] [ 51.080357] Freed by task 212: [ 51.080760] kasan_save_stack+0x22/0x50 [ 51.081257] kasan_set_track+0x25/0x30 [ 51.081746] kasan_save_free_info+0x2b/0x50 [ 51.082272] __kasan_slab_free+0x10a/0x190 [ 51.082799] kmem_cache_free+0x10d/0x4d0 [ 51.083311] rcu_core+0x8c8/0x2860 [ 51.083749] __do_softirq+0x1b7/0x7d4 [ 51.084222] [ 51.084434] Last potentially related work creation: [ 51.085028] kasan_save_stack+0x22/0x50 [ 51.085530] __kasan_record_aux_stack+0x8e/0xa0 [ 51.086099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.086744] remove_vma+0x139/0x170 [ 51.087190] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.087767] do_vmi_munmap+0x1f1/0x2b0 [ 51.088250] __vm_munmap+0x138/0x3a0 [ 51.088711] __x64_sys_munmap+0x59/0x80 [ 51.089203] do_syscall_64+0x3f/0x90 [ 51.089669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.090313] [ 51.090526] The buggy address belongs to the object at ffff888019b89828 [ 51.090526] which belongs to the cache vm_area_struct of size 168 [ 51.091981] The buggy address is located 88 bytes inside of [ 51.091981] freed 168-byte region [ffff888019b89828, ffff888019b898d0) [ 51.093365] [ 51.093579] The buggy address belongs to the physical page: [ 51.094231] page:000000005b92ca43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b89 [ 51.095335] memcg:ffff8880186d0a01 [ 51.095768] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.096402] page_type: 0xffffffff() [ 51.096861] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.097766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880186d0a01 [ 51.098663] page dumped because: kasan: bad access detected [ 51.099340] [ 51.099552] Memory state around the buggy address: [ 51.100137] ffff888019b89780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 51.100983] ffff888019b89800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 51.101827] >ffff888019b89880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 51.102678] ^ [ 51.103092] ffff888019b89900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.103949] ffff888019b89980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 51.104804] ================================================================== [ 51.105771] Disabling lock debugging due to kernel taint [ 53.027146] BUG: Bad rss-counter state mm:00000000ccc13b71 type:MM_FILEPAGES val:33 [ 53.028088] BUG: Bad rss-counter state mm:00000000ccc13b71 type:MM_ANONPAGES val:22 [ 53.588017] BUG: Bad rss-counter state mm:00000000952f3f39 type:MM_FILEPAGES val:33 [ 53.589177] BUG: Bad rss-counter state mm:00000000952f3f39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25472' (ECDSA) to the list of known hosts. 2023/06/19 11:59:10 fuzzer started 2023/06/19 11:59:11 dialing manager at localhost:44161 2023/06/19 11:59:11 checking machine... 2023/06/19 11:59:11 checking revisions... [ 54.217751] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:59:11 testing simple program... [ 54.269182] cgroup: Unknown subsys name 'net' [ 54.303993] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:58:58 Registers: info registers vcpu 0 RAX=ffffffff8363de43 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028abf3a RSI=ffffffff8363de43 RDI=ffff88801455fa40 RBP=ffff88801455fa10 RSP=ffff88801455f970 R8 =0000000000000001 R9 =ffff88801455f9b8 R10=0000000000038001 R11=000000000008a96b R12=ffff88801455fa40 R13=0000000000000000 R14=ffff88800d913680 R15=0000000000000d40 RIP=ffffffff813ad424 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 00007f8723e08900 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=00007f87243bf618 CR3=000000000efce000 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=dffffc0000000000 RBX=ffffffff856d8220 RCX=ffffffff812e0423 RDX=ffffffff856d8228 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8228 RSP=ffff88806cf09dd0 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=0000000000000000 R12=ffffffff856d8230 R13=ffff88800fb96d58 R14=ffffffff813782a8 R15=ffff88800e9915c0 RIP=ffffffff812e04e4 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 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=00007fc3697dc6f0 CR3=000000000e984000 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=2030313a39353a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a39353a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000