syzkaller login: [ 40.182819] BUG: Bad rss-counter state mm:000000003d013916 type:MM_FILEPAGES val:33 [ 40.183837] BUG: Bad rss-counter state mm:000000003d013916 type:MM_ANONPAGES val:22 [ 40.348719] ================================================================== [ 40.349646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.350583] Read of size 8 at addr ffff8880146466b0 by task sshd/226 [ 40.351348] [ 40.351762] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.352630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.353609] Call Trace: [ 40.353942] <TASK> [ 40.354234] dump_stack_lvl+0x91/0xf0 [ 40.354733] print_report+0xcc/0x620 [ 40.355220] ? __virt_addr_valid+0x102/0x340 [ 40.355791] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.356427] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.357044] kasan_report+0xbe/0xf0 [ 40.357528] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.358149] vma_interval_tree_remove+0xc75/0xec0 [ 40.358759] vma_prepare+0xc54/0x11a0 [ 40.359236] __split_vma+0x5af/0x950 [ 40.359733] ? __pfx___split_vma+0x10/0x10 [ 40.360267] ? find_held_lock+0x2c/0x110 [ 40.360790] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.361361] ? lock_is_held_type+0x9f/0x120 [ 40.361908] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.362522] ? mtree_range_walk+0x632/0x900 [ 40.363072] ? mas_walk+0x5c7/0x7c0 [ 40.363560] do_vmi_munmap+0x1f1/0x2b0 [ 40.364062] mmap_region+0x1f9/0x2660 [ 40.364555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.365070] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.365798] ? __pfx_lock_acquire+0x10/0x10 [ 40.366348] ? __pfx_mmap_region+0x10/0x10 [ 40.366886] ? security_mmap_addr+0x7d/0xa0 [ 40.367427] ? get_unmapped_area+0x1f5/0x3f0 [ 40.367996] do_mmap+0x854/0xf00 [ 40.368444] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.368943] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.369516] ksys_mmap_pgoff+0x3af/0x500 [ 40.370030] do_syscall_64+0x3f/0x90 [ 40.370513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.371166] RIP: 0033:0x7facc3909d82 [ 40.371650] 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 [ 40.373819] RSP: 002b:00007fffd08ee748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.374744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007facc3909d82 [ 40.375614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007facc2d43000 [ 40.376472] RBP: 00007facc2d43000 R08: 0000000000000009 R09: 0000000000001000 [ 40.377326] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592ed2c1ec0 [ 40.378176] R13: 00007fffd08ee760 R14: 00007fffd08ee790 R15: 00007fffd08eeaf0 [ 40.379054] </TASK> [ 40.379356] [ 40.379588] Allocated by task 219: [ 40.380015] kasan_save_stack+0x22/0x50 [ 40.380536] kasan_set_track+0x25/0x30 [ 40.381039] __kasan_slab_alloc+0x59/0x70 [ 40.381570] kmem_cache_alloc+0x16b/0x370 [ 40.382100] vm_area_dup+0x20/0x160 [ 40.382562] __split_vma+0x170/0x950 [ 40.383026] split_vma+0xc6/0x110 [ 40.383489] mprotect_fixup+0x8d2/0xb30 [ 40.383996] do_mprotect_pkey+0x87e/0xd40 [ 40.384524] __x64_sys_mprotect+0x78/0xc0 [ 40.385049] do_syscall_64+0x3f/0x90 [ 40.385530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.386180] [ 40.386403] Freed by task 219: [ 40.386810] kasan_save_stack+0x22/0x50 [ 40.387321] kasan_set_track+0x25/0x30 [ 40.387826] kasan_save_free_info+0x2b/0x50 [ 40.388373] __kasan_slab_free+0x10a/0x190 [ 40.388924] kmem_cache_free+0x10d/0x4d0 [ 40.389435] rcu_core+0x8c8/0x2860 [ 40.389898] __do_softirq+0x1b7/0x7d4 [ 40.390380] [ 40.390599] Last potentially related work creation: [ 40.391182] kasan_save_stack+0x22/0x50 [ 40.391700] __kasan_record_aux_stack+0x8e/0xa0 [ 40.392285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.392997] remove_vma+0x139/0x170 [ 40.393459] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.394021] do_vmi_munmap+0x1f1/0x2b0 [ 40.394518] __vm_munmap+0x138/0x3a0 [ 40.394994] __x64_sys_munmap+0x59/0x80 [ 40.395507] do_syscall_64+0x3f/0x90 [ 40.395986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.396628] [ 40.396845] The buggy address belongs to the object at ffff888014646658 [ 40.396845] which belongs to the cache vm_area_struct of size 168 [ 40.398334] The buggy address is located 88 bytes inside of [ 40.398334] freed 168-byte region [ffff888014646658, ffff888014646700) [ 40.399794] [ 40.400009] The buggy address belongs to the physical page: [ 40.400675] page:00000000a85ba293 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14646 [ 40.401782] memcg:ffff888016512a01 [ 40.402214] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.402857] page_type: 0xffffffff() [ 40.403319] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.404265] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016512a01 [ 40.405193] page dumped because: kasan: bad access detected [ 40.405853] [ 40.406068] Memory state around the buggy address: [ 40.406651] ffff888014646580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.407533] ffff888014646600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.408397] >ffff888014646680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.409271] ^ [ 40.409864] ffff888014646700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.410727] ffff888014646780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.411612] ================================================================== [ 40.412553] Disabling lock debugging due to kernel taint [ 42.399466] BUG: Bad rss-counter state mm:00000000d56e94f9 type:MM_FILEPAGES val:33 [ 42.400690] BUG: Bad rss-counter state mm:00000000d56e94f9 type:MM_ANONPAGES val:22 [ 42.831002] BUG: Bad rss-counter state mm:000000007064a0e8 type:MM_FILEPAGES val:33 [ 42.832518] BUG: Bad rss-counter state mm:000000007064a0e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14944' (ECDSA) to the list of known hosts. 2023/06/20 03:55:51 fuzzer started 2023/06/20 03:55:51 dialing manager at localhost:44161 2023/06/20 03:55:51 checking machine... 2023/06/20 03:55:51 checking revisions... [ 43.555105] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:55:51 testing simple program... [ 43.608000] cgroup: Unknown subsys name 'net' [ 43.654197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:55:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f6e4ac420b0 CR3=000000000e176000 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=2031353a35353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a35353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800e0b25f0 RCX=ffff88800e0b25f0 RDX=00000000000d000d RSI=ffff88800e0b25f0 RDI=ffff88800844f780 RBP=ffff8880165c7a28 RSP=ffff8880165c7990 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000382c80 R11=00000000000d000c R12=ffffea0000382c80 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 00007f6e4a68a900 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=00007ffe5e118000 CR3=000000001997e000 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=6720646572637465733a4d41503d706f 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