syzkaller login: [ 30.841347] BUG: Bad rss-counter state mm:00000000532a523b type:MM_FILEPAGES val:33 [ 30.842014] BUG: Bad rss-counter state mm:00000000532a523b type:MM_ANONPAGES val:22 [ 31.013716] ================================================================== [ 31.014690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.015691] Read of size 8 at addr ffff8880094f0140 by task sshd/220 [ 31.016667] [ 31.016906] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.017836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.018907] Call Trace: [ 31.019256] [ 31.019575] dump_stack_lvl+0x91/0xf0 [ 31.020130] print_report+0xcc/0x620 [ 31.020660] ? __virt_addr_valid+0x102/0x340 [ 31.021249] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.021922] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.022604] kasan_report+0xbe/0xf0 [ 31.023132] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.023821] vma_interval_tree_remove+0xc75/0xec0 [ 31.024487] vma_prepare+0xc54/0x11a0 [ 31.025009] __split_vma+0x5af/0x950 [ 31.025527] ? __pfx___split_vma+0x10/0x10 [ 31.026106] ? find_held_lock+0x2c/0x110 [ 31.026680] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.027297] ? lock_is_held_type+0x9f/0x120 [ 31.027891] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.028582] ? mtree_range_walk+0x632/0x900 [ 31.029187] ? mas_walk+0x5c7/0x7c0 [ 31.029713] do_vmi_munmap+0x1f1/0x2b0 [ 31.030254] mmap_region+0x1f9/0x2660 [ 31.030784] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.031343] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.032134] ? __pfx_lock_acquire+0x10/0x10 [ 31.032734] ? __pfx_mmap_region+0x10/0x10 [ 31.033322] ? security_mmap_addr+0x7d/0xa0 [ 31.033912] ? get_unmapped_area+0x1f5/0x3f0 [ 31.034514] do_mmap+0x854/0xf00 [ 31.034994] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.035536] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.036171] ksys_mmap_pgoff+0x3af/0x500 [ 31.036730] do_syscall_64+0x3f/0x90 [ 31.037251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.037960] RIP: 0033:0x7f462df65d82 [ 31.038459] 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 [ 31.040903] RSP: 002b:00007ffccca2a368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.041893] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f462df65d82 [ 31.042820] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f462d39f000 [ 31.043753] RBP: 00007f462d39f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.044699] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1bf573f60 [ 31.045637] R13: 00007ffccca2a380 R14: 00007ffccca2a3b0 R15: 00007ffccca2a710 [ 31.046581] [ 31.046904] [ 31.047138] Allocated by task 213: [ 31.047607] kasan_save_stack+0x22/0x50 [ 31.048175] kasan_set_track+0x25/0x30 [ 31.048719] __kasan_slab_alloc+0x59/0x70 [ 31.049293] kmem_cache_alloc+0x16b/0x370 [ 31.049855] vm_area_dup+0x20/0x160 [ 31.050358] __split_vma+0x170/0x950 [ 31.050866] split_vma+0xc6/0x110 [ 31.051359] mprotect_fixup+0x8d2/0xb30 [ 31.051915] do_mprotect_pkey+0x87e/0xd40 [ 31.052491] __x64_sys_mprotect+0x78/0xc0 [ 31.053062] do_syscall_64+0x3f/0x90 [ 31.053586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.054295] [ 31.054537] Freed by task 203: [ 31.054971] kasan_save_stack+0x22/0x50 [ 31.055530] kasan_set_track+0x25/0x30 [ 31.056075] kasan_save_free_info+0x2b/0x50 [ 31.056678] __kasan_slab_free+0x10a/0x190 [ 31.057262] kmem_cache_free+0x10d/0x4d0 [ 31.057822] rcu_core+0x8c8/0x2860 [ 31.058314] __do_softirq+0x1b7/0x7d4 [ 31.058844] [ 31.059083] Last potentially related work creation: [ 31.059731] kasan_save_stack+0x22/0x50 [ 31.060295] __kasan_record_aux_stack+0x8e/0xa0 [ 31.060929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.061638] remove_vma+0x139/0x170 [ 31.062132] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.062742] do_vmi_munmap+0x1f1/0x2b0 [ 31.063273] __vm_munmap+0x138/0x3a0 [ 31.063786] __x64_sys_munmap+0x59/0x80 [ 31.064358] do_syscall_64+0x3f/0x90 [ 31.064885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.065600] [ 31.065834] The buggy address belongs to the object at ffff8880094f00e8 [ 31.065834] which belongs to the cache vm_area_struct of size 168 [ 31.067472] The buggy address is located 88 bytes inside of [ 31.067472] freed 168-byte region [ffff8880094f00e8, ffff8880094f0190) [ 31.069038] [ 31.069280] The buggy address belongs to the physical page: [ 31.070012] page:0000000091b8678f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94f0 [ 31.071217] memcg:ffff88800ecc2301 [ 31.071698] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.072422] page_type: 0xffffffff() [ 31.072913] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.073942] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecc2301 [ 31.074957] page dumped because: kasan: bad access detected [ 31.075680] [ 31.075913] Memory state around the buggy address: [ 31.076578] ffff8880094f0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.077517] ffff8880094f0080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.078468] >ffff8880094f0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.079422] ^ [ 31.080140] ffff8880094f0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.081094] ffff8880094f0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.082049] ================================================================== [ 31.083254] Disabling lock debugging due to kernel taint [ 33.567083] BUG: Bad rss-counter state mm:000000009ab506a6 type:MM_FILEPAGES val:33 [ 33.568299] BUG: Bad rss-counter state mm:000000009ab506a6 type:MM_ANONPAGES val:22 [ 33.944472] BUG: Bad rss-counter state mm:000000003558f466 type:MM_FILEPAGES val:33 [ 33.945674] BUG: Bad rss-counter state mm:000000003558f466 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38904' (ECDSA) to the list of known hosts. 2023/06/20 15:46:27 fuzzer started 2023/06/20 15:46:27 dialing manager at localhost:36067 2023/06/20 15:46:27 checking machine... 2023/06/20 15:46:27 checking revisions... [ 34.707749] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:46:28 testing simple program... [ 34.750668] cgroup: Unknown subsys name 'net' [ 34.817470] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:46:27 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8613f40e RDX=0000000000000008 RSI=ffff888019adfcd0 RDI=ffff888019adfab0 RBP=ffff888019adfb08 RSP=ffff888019adfa38 R8 =ffffffff8613f412 R9 =ffff888019adfaf0 R10=0000000000038001 R11=0000000000021e7d R12=ffff888019adfb10 R13=ffff888019adfaf8 R14=ffff888019adfcd8 R15=ffff888019adfab0 RIP=ffffffff811303f0 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 00007f792a54e900 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=000055d63c3dd768 CR3=000000000ddce000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe7e280438 CR3=00000000197d0000 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=36343a3531203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38333131342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383331 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000