syzkaller login: [ 31.737167] BUG: Bad rss-counter state mm:0000000040aa5443 type:MM_FILEPAGES val:33 [ 31.739065] BUG: Bad rss-counter state mm:0000000040aa5443 type:MM_ANONPAGES val:22 [ 31.901320] ================================================================== [ 31.902220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.903186] Read of size 8 at addr ffff888018c9c4e0 by task sshd/220 [ 31.904062] [ 31.904281] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.905172] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.906175] Call Trace: [ 31.906496] [ 31.906779] dump_stack_lvl+0x91/0xf0 [ 31.907270] print_report+0xcc/0x620 [ 31.907753] ? __virt_addr_valid+0x102/0x340 [ 31.908313] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.908957] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.909583] kasan_report+0xbe/0xf0 [ 31.910062] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.910698] vma_interval_tree_remove+0xc75/0xec0 [ 31.911314] vma_prepare+0xc54/0x11a0 [ 31.911804] __split_vma+0x5af/0x950 [ 31.912280] ? __pfx___split_vma+0x10/0x10 [ 31.912832] ? find_held_lock+0x2c/0x110 [ 31.913365] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.913938] ? lock_is_held_type+0x9f/0x120 [ 31.914483] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.915114] ? mtree_range_walk+0x632/0x900 [ 31.915677] ? mas_walk+0x5c7/0x7c0 [ 31.916156] do_vmi_munmap+0x1f1/0x2b0 [ 31.916659] mmap_region+0x1f9/0x2660 [ 31.917152] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.917665] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.918387] ? __pfx_lock_acquire+0x10/0x10 [ 31.918930] ? __pfx_mmap_region+0x10/0x10 [ 31.919457] ? security_mmap_addr+0x7d/0xa0 [ 31.919986] ? get_unmapped_area+0x1f5/0x3f0 [ 31.920569] do_mmap+0x854/0xf00 [ 31.921009] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.921503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.922068] ksys_mmap_pgoff+0x3af/0x500 [ 31.922578] do_syscall_64+0x3f/0x90 [ 31.923063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.923711] RIP: 0033:0x7f72e1b3fd82 [ 31.924175] 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 [ 31.926302] RSP: 002b:00007ffd3eec3bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.927207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72e1b3fd82 [ 31.928053] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72e0f79000 [ 31.928913] RBP: 00007f72e0f79000 R08: 0000000000000009 R09: 0000000000001000 [ 31.929772] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c26ac51ec0 [ 31.930618] R13: 00007ffd3eec3bd0 R14: 00007ffd3eec3c00 R15: 00007ffd3eec3f60 [ 31.931476] [ 31.931768] [ 31.931982] Allocated by task 213: [ 31.932412] kasan_save_stack+0x22/0x50 [ 31.932944] kasan_set_track+0x25/0x30 [ 31.933438] __kasan_slab_alloc+0x59/0x70 [ 31.933961] kmem_cache_alloc+0x16b/0x370 [ 31.934477] vm_area_dup+0x20/0x160 [ 31.934932] __split_vma+0x170/0x950 [ 31.935407] split_vma+0xc6/0x110 [ 31.935855] mprotect_fixup+0x8d2/0xb30 [ 31.936356] do_mprotect_pkey+0x87e/0xd40 [ 31.936888] __x64_sys_mprotect+0x78/0xc0 [ 31.937411] do_syscall_64+0x3f/0x90 [ 31.937887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.938525] [ 31.938739] Freed by task 213: [ 31.939134] kasan_save_stack+0x22/0x50 [ 31.939635] kasan_set_track+0x25/0x30 [ 31.940130] kasan_save_free_info+0x2b/0x50 [ 31.940667] __kasan_slab_free+0x10a/0x190 [ 31.941199] kmem_cache_free+0x10d/0x4d0 [ 31.941709] rcu_core+0x8c8/0x2860 [ 31.942159] __do_softirq+0x1b7/0x7d4 [ 31.942643] [ 31.942859] Last potentially related work creation: [ 31.943452] kasan_save_stack+0x22/0x50 [ 31.943958] __kasan_record_aux_stack+0x8e/0xa0 [ 31.944549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.945191] remove_vma+0x139/0x170 [ 31.945646] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.946204] do_vmi_munmap+0x1f1/0x2b0 [ 31.946688] __vm_munmap+0x138/0x3a0 [ 31.947165] __x64_sys_munmap+0x59/0x80 [ 31.947662] do_syscall_64+0x3f/0x90 [ 31.948133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.948782] [ 31.949000] The buggy address belongs to the object at ffff888018c9c488 [ 31.949000] which belongs to the cache vm_area_struct of size 168 [ 31.950476] The buggy address is located 88 bytes inside of [ 31.950476] freed 168-byte region [ffff888018c9c488, ffff888018c9c530) [ 31.951879] [ 31.952101] The buggy address belongs to the physical page: [ 31.952778] page:00000000d6d37158 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c9c [ 31.953867] memcg:ffff88800feb1401 [ 31.954298] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.954943] page_type: 0xffffffff() [ 31.955401] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.956316] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800feb1401 [ 31.957227] page dumped because: kasan: bad access detected [ 31.957884] [ 31.958099] Memory state around the buggy address: [ 31.958682] ffff888018c9c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.959540] ffff888018c9c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.960411] >ffff888018c9c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.961281] ^ [ 31.962037] ffff888018c9c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.962918] ffff888018c9c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.963769] ================================================================== [ 31.964750] Disabling lock debugging due to kernel taint [ 33.877277] BUG: Bad rss-counter state mm:000000005aa60f76 type:MM_FILEPAGES val:33 [ 33.878414] BUG: Bad rss-counter state mm:000000005aa60f76 type:MM_ANONPAGES val:22 [ 34.363715] BUG: Bad rss-counter state mm:0000000021ac9091 type:MM_FILEPAGES val:33 [ 34.364912] BUG: Bad rss-counter state mm:0000000021ac9091 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57927' (ECDSA) to the list of known hosts. 2023/06/19 15:54:22 fuzzer started 2023/06/19 15:54:22 dialing manager at localhost:44161 2023/06/19 15:54:22 checking machine... 2023/06/19 15:54:22 checking revisions... [ 34.930219] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:54:22 testing simple program... [ 34.963834] cgroup: Unknown subsys name 'net' [ 34.994329] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:54:20 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800dec7e40 RCX=ffff88800dec7e40 RDX=00000000000d000d RSI=ffff88800dec7e40 RDI=ffff88800844f780 RBP=ffff888015a7f908 RSP=ffff888015a7f870 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea000037b1c0 R11=000000008015000c R12=ffffea000037b1c0 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007f8b76783700 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=00007f64e73b7a20 CR3=000000000e40c000 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=2032323a34353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a34353a3531203931 XMM08=3d656e696c646d632022656369767265 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=ffff88801a050000 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015977398 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88801a1bf980 RIP=ffffffff81374460 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 00007fd04fc4c900 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=00007fd050203618 CR3=000000001c93a000 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