syzkaller login: [ 39.198173] BUG: Bad rss-counter state mm:00000000a3b5ed75 type:MM_FILEPAGES val:33 [ 39.199444] BUG: Bad rss-counter state mm:00000000a3b5ed75 type:MM_ANONPAGES val:22 [ 39.237497] ================================================================== [ 39.238577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.239700] Read of size 8 at addr ffff88800eb3d880 by task sshd/224 [ 39.240520] [ 39.240752] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.241684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.242729] Call Trace: [ 39.243068] [ 39.243389] dump_stack_lvl+0x91/0xf0 [ 39.243911] print_report+0xcc/0x620 [ 39.244435] ? __virt_addr_valid+0x102/0x340 [ 39.245027] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.245688] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.246350] kasan_report+0xbe/0xf0 [ 39.246857] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.247543] vma_interval_tree_remove+0xc75/0xec0 [ 39.248200] vma_prepare+0xc54/0x11a0 [ 39.248732] __split_vma+0x5af/0x950 [ 39.249248] ? __pfx___split_vma+0x10/0x10 [ 39.249828] ? find_held_lock+0x2c/0x110 [ 39.250397] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.251014] ? asm_common_interrupt+0x26/0x40 [ 39.251662] ? lock_is_held_type+0x9f/0x120 [ 39.252247] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.252910] ? mtree_range_walk+0x632/0x900 [ 39.253508] ? mas_walk+0x5c7/0x7c0 [ 39.254030] do_vmi_munmap+0x1f1/0x2b0 [ 39.254571] mmap_region+0x1f9/0x2660 [ 39.255115] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.255684] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.256464] ? __pfx_lock_acquire+0x10/0x10 [ 39.257047] ? __pfx_mmap_region+0x10/0x10 [ 39.257623] ? security_mmap_addr+0x7d/0xa0 [ 39.258205] ? get_unmapped_area+0x1f5/0x3f0 [ 39.258799] do_mmap+0x854/0xf00 [ 39.259276] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.259816] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.260426] ksys_mmap_pgoff+0x3af/0x500 [ 39.260970] do_syscall_64+0x3f/0x90 [ 39.261490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.262194] RIP: 0033:0x7f63d79c7d82 [ 39.262706] 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 [ 39.265033] RSP: 002b:00007fffa5dc3208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.266048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63d79c7d82 [ 39.266993] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63d6e01000 [ 39.267942] RBP: 00007f63d6e01000 R08: 0000000000000009 R09: 0000000000001000 [ 39.268886] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cca4fa3ec0 [ 39.269832] R13: 00007fffa5dc3220 R14: 00007fffa5dc3250 R15: 00007fffa5dc35b0 [ 39.270782] [ 39.271108] [ 39.271360] Allocated by task 217: [ 39.271838] kasan_save_stack+0x22/0x50 [ 39.272398] kasan_set_track+0x25/0x30 [ 39.272951] __kasan_slab_alloc+0x59/0x70 [ 39.273532] kmem_cache_alloc+0x16b/0x370 [ 39.274113] vm_area_dup+0x20/0x160 [ 39.274617] __split_vma+0x170/0x950 [ 39.275137] split_vma+0xc6/0x110 [ 39.275629] mprotect_fixup+0x8d2/0xb30 [ 39.276189] do_mprotect_pkey+0x87e/0xd40 [ 39.276769] __x64_sys_mprotect+0x78/0xc0 [ 39.277349] do_syscall_64+0x3f/0x90 [ 39.277879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.278595] [ 39.278835] Freed by task 217: [ 39.279280] kasan_save_stack+0x22/0x50 [ 39.279850] kasan_set_track+0x25/0x30 [ 39.280402] kasan_save_free_info+0x2b/0x50 [ 39.280996] __kasan_slab_free+0x10a/0x190 [ 39.281590] kmem_cache_free+0x10d/0x4d0 [ 39.282157] rcu_core+0x8c8/0x2860 [ 39.282653] __do_softirq+0x1b7/0x7d4 [ 39.283183] [ 39.283440] Last potentially related work creation: [ 39.284090] kasan_save_stack+0x22/0x50 [ 39.284649] __kasan_record_aux_stack+0x8e/0xa0 [ 39.285289] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.286006] remove_vma+0x139/0x170 [ 39.286511] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.287132] do_vmi_munmap+0x1f1/0x2b0 [ 39.287678] __vm_munmap+0x138/0x3a0 [ 39.288197] __x64_sys_munmap+0x59/0x80 [ 39.288751] do_syscall_64+0x3f/0x90 [ 39.289270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.289988] [ 39.290226] The buggy address belongs to the object at ffff88800eb3d828 [ 39.290226] which belongs to the cache vm_area_struct of size 168 [ 39.291878] The buggy address is located 88 bytes inside of [ 39.291878] freed 168-byte region [ffff88800eb3d828, ffff88800eb3d8d0) [ 39.293441] [ 39.293681] The buggy address belongs to the physical page: [ 39.294412] page:0000000008a14d61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb3d [ 39.295628] memcg:ffff88800e701e01 [ 39.296101] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.296822] page_type: 0xffffffff() [ 39.297324] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.298349] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e701e01 [ 39.299382] page dumped because: kasan: bad access detected [ 39.300122] [ 39.300361] Memory state around the buggy address: [ 39.301005] ffff88800eb3d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.301960] ffff88800eb3d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.302912] >ffff88800eb3d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.303867] ^ [ 39.304331] ffff88800eb3d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.305290] ffff88800eb3d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.306238] ================================================================== [ 39.307456] Disabling lock debugging due to kernel taint [ 41.304831] BUG: Bad rss-counter state mm:000000009324062e type:MM_FILEPAGES val:33 [ 41.306475] BUG: Bad rss-counter state mm:000000009324062e type:MM_ANONPAGES val:22 [ 41.795827] BUG: Bad rss-counter state mm:00000000f2d74c09 type:MM_FILEPAGES val:33 [ 41.796922] BUG: Bad rss-counter state mm:00000000f2d74c09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25713' (ECDSA) to the list of known hosts. 2023/06/20 00:13:34 fuzzer started 2023/06/20 00:13:34 dialing manager at localhost:44161 2023/06/20 00:13:34 checking machine... 2023/06/20 00:13:34 checking revisions... [ 42.517599] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:13:34 testing simple program... [ 42.561820] cgroup: Unknown subsys name 'net' [ 42.664887] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:13:34 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=00007f9f39bd30e0 CR3=000000000cc08000 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=ad7a4873b5cdc98c82485d19bdcbf921 XMM02=ec2efd57dc4c00df000000000011e850 XMM03=80d7914cb39ba53e000000000011e920 XMM04=3d901921e6b5cbc500000000000ae988 XMM05=48344353bf52170e0000000000135648 XMM06=993088549562ad030000000000134378 XMM07=e042d86d42eb936e0000000000124d48 XMM08=80d7914cb39ba53e000000000011e920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff84531da6 RDX=000000000003531d RSI=000000000003531d RDI=ffffffff865bc834 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007fcbed7f3900 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=00007ffdd05bd000 CR3=000000001a8d2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000