syzkaller login: [ 39.315646] BUG: Bad rss-counter state mm:00000000b4c1bfce type:MM_FILEPAGES val:33 [ 39.316868] BUG: Bad rss-counter state mm:00000000b4c1bfce type:MM_ANONPAGES val:22 [ 39.353772] ================================================================== [ 39.354720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.355669] Read of size 8 at addr ffff88800e5d74e0 by task sshd/219 [ 39.356462] [ 39.356681] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.357543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.358531] Call Trace: [ 39.358850] [ 39.359141] dump_stack_lvl+0x91/0xf0 [ 39.359640] print_report+0xcc/0x620 [ 39.360146] ? __virt_addr_valid+0x102/0x340 [ 39.360703] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.361336] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.361957] kasan_report+0xbe/0xf0 [ 39.362441] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.363070] vma_interval_tree_remove+0xc75/0xec0 [ 39.363674] vma_prepare+0xc54/0x11a0 [ 39.364163] __split_vma+0x5af/0x950 [ 39.364647] ? __pfx___split_vma+0x10/0x10 [ 39.365180] ? find_held_lock+0x2c/0x110 [ 39.365708] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.366275] ? lock_is_held_type+0x9f/0x120 [ 39.366821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.367434] ? mtree_range_walk+0x632/0x900 [ 39.368014] ? mas_walk+0x5c7/0x7c0 [ 39.368501] do_vmi_munmap+0x1f1/0x2b0 [ 39.368997] mmap_region+0x1f9/0x2660 [ 39.369489] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.370005] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.370735] ? __pfx_lock_acquire+0x10/0x10 [ 39.371280] ? __pfx_mmap_region+0x10/0x10 [ 39.371828] ? security_mmap_addr+0x7d/0xa0 [ 39.372360] ? get_unmapped_area+0x1f5/0x3f0 [ 39.372922] do_mmap+0x854/0xf00 [ 39.373372] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.373873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.374443] ksys_mmap_pgoff+0x3af/0x500 [ 39.374960] do_syscall_64+0x3f/0x90 [ 39.375447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.376107] RIP: 0033:0x7f0dcfbf0d82 [ 39.376565] 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 [ 39.378735] RSP: 002b:00007ffe25800af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.379657] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0dcfbf0d82 [ 39.380528] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0dcf02a000 [ 39.381495] RBP: 00007f0dcf02a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.382373] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d50072f70 [ 39.383236] R13: 00007ffe25800b10 R14: 00007ffe25800b40 R15: 00007ffe25800ea0 [ 39.384120] [ 39.384416] [ 39.384631] Allocated by task 212: [ 39.385068] kasan_save_stack+0x22/0x50 [ 39.385580] kasan_set_track+0x25/0x30 [ 39.386089] __kasan_slab_alloc+0x59/0x70 [ 39.386617] kmem_cache_alloc+0x16b/0x370 [ 39.387140] vm_area_dup+0x20/0x160 [ 39.387598] __split_vma+0x170/0x950 [ 39.388082] split_vma+0xc6/0x110 [ 39.388537] mprotect_fixup+0x8d2/0xb30 [ 39.389044] do_mprotect_pkey+0x87e/0xd40 [ 39.389580] __x64_sys_mprotect+0x78/0xc0 [ 39.390109] do_syscall_64+0x3f/0x90 [ 39.390585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.391235] [ 39.391456] Freed by task 212: [ 39.391858] kasan_save_stack+0x22/0x50 [ 39.392369] kasan_set_track+0x25/0x30 [ 39.392869] kasan_save_free_info+0x2b/0x50 [ 39.393408] __kasan_slab_free+0x10a/0x190 [ 39.393940] kmem_cache_free+0x10d/0x4d0 [ 39.394460] rcu_core+0x8c8/0x2860 [ 39.394911] __do_softirq+0x1b7/0x7d4 [ 39.395405] [ 39.395628] Last potentially related work creation: [ 39.396244] kasan_save_stack+0x22/0x50 [ 39.396763] __kasan_record_aux_stack+0x8e/0xa0 [ 39.397343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.398002] remove_vma+0x139/0x170 [ 39.398465] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.399033] do_vmi_munmap+0x1f1/0x2b0 [ 39.399525] __vm_munmap+0x138/0x3a0 [ 39.400022] __x64_sys_munmap+0x59/0x80 [ 39.400535] do_syscall_64+0x3f/0x90 [ 39.401023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.401674] [ 39.401891] Second to last potentially related work creation: [ 39.402575] kasan_save_stack+0x22/0x50 [ 39.403095] __kasan_record_aux_stack+0x8e/0xa0 [ 39.403675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.404342] remove_vma+0x139/0x170 [ 39.404796] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.405366] do_vmi_munmap+0x1f1/0x2b0 [ 39.405853] mmap_region+0x1f9/0x2660 [ 39.406337] do_mmap+0x854/0xf00 [ 39.406775] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.407269] ksys_mmap_pgoff+0x3af/0x500 [ 39.407782] do_syscall_64+0x3f/0x90 [ 39.408257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.408902] [ 39.409126] The buggy address belongs to the object at ffff88800e5d7488 [ 39.409126] which belongs to the cache vm_area_struct of size 168 [ 39.410602] The buggy address is located 88 bytes inside of [ 39.410602] freed 168-byte region [ffff88800e5d7488, ffff88800e5d7530) [ 39.412037] [ 39.412256] The buggy address belongs to the physical page: [ 39.412911] page:000000009003d8e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5d7 [ 39.414001] memcg:ffff88800c5eac01 [ 39.414436] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.415082] page_type: 0xffffffff() [ 39.415536] raw: 0100000000000200 ffff88800879fc80 ffffea0000567d80 dead000000000002 [ 39.416490] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5eac01 [ 39.417404] page dumped because: kasan: bad access detected [ 39.418069] [ 39.418292] Memory state around the buggy address: [ 39.418877] ffff88800e5d7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.419744] ffff88800e5d7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.420615] >ffff88800e5d7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.421470] ^ [ 39.422236] ffff88800e5d7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 39.423097] ffff88800e5d7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.423967] ================================================================== [ 39.425119] Disabling lock debugging due to kernel taint [ 41.308731] BUG: Bad rss-counter state mm:000000005d05d5dc type:MM_FILEPAGES val:33 [ 41.309798] BUG: Bad rss-counter state mm:000000005d05d5dc type:MM_ANONPAGES val:22 [ 41.854592] BUG: Bad rss-counter state mm:00000000d28017c2 type:MM_FILEPAGES val:33 [ 41.855599] BUG: Bad rss-counter state mm:00000000d28017c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8376' (ECDSA) to the list of known hosts. 2023/06/19 16:58:07 fuzzer started 2023/06/19 16:58:07 dialing manager at localhost:44161 2023/06/19 16:58:07 checking machine... 2023/06/19 16:58:07 checking revisions... [ 42.524388] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:58:08 testing simple program... [ 42.570133] cgroup: Unknown subsys name 'net' [ 42.628650] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:58:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135a RSI=ffffffff8185ae43 RDI=ffff88806ce09b40 RBP=ffff88806ce09b10 RSP=ffff88806ce09a70 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000223ea R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff8880100dd1c0 R15=ffff8880197f7c00 RIP=ffffffff813ad42e 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 00007f899445b900 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=00007ffe703a1000 CR3=000000000d98e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f9888b73000 CR3=000000000eea2000 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=2037303a38353a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a38353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000