syzkaller login: [ 37.672622] BUG: Bad rss-counter state mm:00000000b248dc7d type:MM_FILEPAGES val:33 [ 37.674400] BUG: Bad rss-counter state mm:00000000b248dc7d type:MM_ANONPAGES val:22 [ 37.847476] ================================================================== [ 37.848583] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.849769] Read of size 8 at addr ffff88800df33880 by task sshd/220 [ 37.850783] [ 37.851059] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.852127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.853350] Call Trace: [ 37.853745] <TASK> [ 37.854125] dump_stack_lvl+0x91/0xf0 [ 37.854744] print_report+0xcc/0x620 [ 37.855301] ? __virt_addr_valid+0x102/0x340 [ 37.855914] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.856593] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.857274] kasan_report+0xbe/0xf0 [ 37.857804] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.858500] vma_interval_tree_remove+0xc75/0xec0 [ 37.859174] vma_prepare+0xc54/0x11a0 [ 37.859704] __split_vma+0x5af/0x950 [ 37.860227] ? __pfx___split_vma+0x10/0x10 [ 37.860814] ? find_held_lock+0x2c/0x110 [ 37.861396] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.862028] ? lock_is_held_type+0x9f/0x120 [ 37.862628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.863297] ? mtree_range_walk+0x632/0x900 [ 37.863905] ? mas_walk+0x5c7/0x7c0 [ 37.864427] do_vmi_munmap+0x1f1/0x2b0 [ 37.864972] mmap_region+0x1f9/0x2660 [ 37.865509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.866097] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.866884] ? __pfx_lock_acquire+0x10/0x10 [ 37.867474] ? __pfx_mmap_region+0x10/0x10 [ 37.868066] ? security_mmap_addr+0x7d/0xa0 [ 37.868659] ? get_unmapped_area+0x1f5/0x3f0 [ 37.869267] do_mmap+0x854/0xf00 [ 37.869747] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.870303] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.870924] ksys_mmap_pgoff+0x3af/0x500 [ 37.871486] do_syscall_64+0x3f/0x90 [ 37.872015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.872730] RIP: 0033:0x7f9a8c4c1d82 [ 37.873233] 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 [ 37.875579] RSP: 002b:00007ffe82d19338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.876588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a8c4c1d82 [ 37.877527] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a8b8fb000 [ 37.878482] RBP: 00007f9a8b8fb000 R08: 0000000000000009 R09: 0000000000001000 [ 37.879416] R10: 0000000000000812 R11: 0000000000000206 R12: 000056487f0b9ec0 [ 37.880361] R13: 00007ffe82d19350 R14: 00007ffe82d19380 R15: 00007ffe82d196e0 [ 37.881318] </TASK> [ 37.881642] [ 37.881883] Allocated by task 213: [ 37.882357] kasan_save_stack+0x22/0x50 [ 37.882907] kasan_set_track+0x25/0x30 [ 37.883447] __kasan_slab_alloc+0x59/0x70 [ 37.884025] kmem_cache_alloc+0x16b/0x370 [ 37.884592] vm_area_dup+0x20/0x160 [ 37.885085] __split_vma+0x170/0x950 [ 37.885597] split_vma+0xc6/0x110 [ 37.886090] mprotect_fixup+0x8d2/0xb30 [ 37.886636] do_mprotect_pkey+0x87e/0xd40 [ 37.887212] __x64_sys_mprotect+0x78/0xc0 [ 37.887792] do_syscall_64+0x3f/0x90 [ 37.888310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.889021] [ 37.889256] Freed by task 203: [ 37.889693] kasan_save_stack+0x22/0x50 [ 37.890252] kasan_set_track+0x25/0x30 [ 37.890797] kasan_save_free_info+0x2b/0x50 [ 37.891376] __kasan_slab_free+0x10a/0x190 [ 37.891961] kmem_cache_free+0x10d/0x4d0 [ 37.892515] rcu_core+0x8c8/0x2860 [ 37.892999] __do_softirq+0x1b7/0x7d4 [ 37.893520] [ 37.893757] Last potentially related work creation: [ 37.894419] kasan_save_stack+0x22/0x50 [ 37.894966] __kasan_record_aux_stack+0x8e/0xa0 [ 37.895595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.896297] remove_vma+0x139/0x170 [ 37.896791] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.897398] do_vmi_munmap+0x1f1/0x2b0 [ 37.897942] __vm_munmap+0x138/0x3a0 [ 37.898453] __x64_sys_munmap+0x59/0x80 [ 37.898993] do_syscall_64+0x3f/0x90 [ 37.899509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.900210] [ 37.900445] Second to last potentially related work creation: [ 37.901200] kasan_save_stack+0x22/0x50 [ 37.901748] __kasan_record_aux_stack+0x8e/0xa0 [ 37.902396] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.903100] remove_vma+0x139/0x170 [ 37.903594] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.904204] do_vmi_munmap+0x1f1/0x2b0 [ 37.904734] __vm_munmap+0x138/0x3a0 [ 37.905241] elf_map+0x26f/0x310 [ 37.905724] load_elf_binary+0x3417/0x5030 [ 37.906312] bprm_execve+0x803/0x1940 [ 37.906821] do_execveat_common+0x734/0x8e0 [ 37.907395] __x64_sys_execve+0x93/0xc0 [ 37.907934] do_syscall_64+0x3f/0x90 [ 37.908456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.909160] [ 37.909395] The buggy address belongs to the object at ffff88800df33828 [ 37.909395] which belongs to the cache vm_area_struct of size 168 [ 37.911015] The buggy address is located 88 bytes inside of [ 37.911015] freed 168-byte region [ffff88800df33828, ffff88800df338d0) [ 37.912562] [ 37.912798] The buggy address belongs to the physical page: [ 37.913524] page:000000005a0ca42e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf33 [ 37.914746] memcg:ffff88800e79de01 [ 37.915209] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.915969] page_type: 0xffffffff() [ 37.916461] raw: 0100000000000200 ffff88800879fc80 ffffea0000639140 dead000000000007 [ 37.917481] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e79de01 [ 37.918481] page dumped because: kasan: bad access detected [ 37.919209] [ 37.919444] Memory state around the buggy address: [ 37.920087] ffff88800df33780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.921020] ffff88800df33800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.921966] >ffff88800df33880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.922911] ^ [ 37.923360] ffff88800df33900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.924302] ffff88800df33980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 37.925234] ================================================================== [ 37.926631] Disabling lock debugging due to kernel taint [ 39.711225] BUG: Bad rss-counter state mm:0000000047e6976c type:MM_FILEPAGES val:33 [ 39.712361] BUG: Bad rss-counter state mm:0000000047e6976c type:MM_ANONPAGES val:22 [ 40.147902] BUG: Bad rss-counter state mm:0000000091dc9e40 type:MM_FILEPAGES val:33 [ 40.149086] BUG: Bad rss-counter state mm:0000000091dc9e40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20958' (ECDSA) to the list of known hosts. 2023/06/19 21:47:31 fuzzer started 2023/06/19 21:47:31 dialing manager at localhost:44161 2023/06/19 21:47:31 checking machine... 2023/06/19 21:47:31 checking revisions... [ 40.783971] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:47:31 testing simple program... [ 40.839929] cgroup: Unknown subsys name 'net' [ 40.900742] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:47:24 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=00007f1442dabd70 CR3=000000001a406000 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=2030333a37343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a37343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000010b7e RBX=0000000000000001 RCX=ffffffff813ad6cf RDX=000000000000000d RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffff888008e579b0 RSP=ffff888008e578d8 R8 =ffffffff860d68c0 R9 =ffff888008e57998 R10=0000000000038001 R11=0000000000010b7e R12=ffff888008e579b8 R13=ffff888008e579a0 R14=ffff888008e57999 R15=ffff888008e57958 RIP=ffffffff8112fc12 RFL=00000212 [----A--] 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=00007fff41160000 CR3=0000000015b54000 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=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