syzkaller login: [ 48.434265] BUG: Bad rss-counter state mm:000000008f999480 type:MM_FILEPAGES val:33 [ 48.435420] BUG: Bad rss-counter state mm:000000008f999480 type:MM_ANONPAGES val:22 [ 48.604561] ================================================================== [ 48.605512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.606496] Read of size 8 at addr ffff8880167df968 by task sshd/219 [ 48.607304] [ 48.607538] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.608564] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.609601] Call Trace: [ 48.609949] [ 48.610247] dump_stack_lvl+0x91/0xf0 [ 48.610755] print_report+0xcc/0x620 [ 48.611261] ? __virt_addr_valid+0x102/0x340 [ 48.611850] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.612500] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.613152] kasan_report+0xbe/0xf0 [ 48.613641] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.614283] vma_interval_tree_remove+0xc75/0xec0 [ 48.614920] vma_prepare+0xc54/0x11a0 [ 48.615436] __split_vma+0x5af/0x950 [ 48.615934] ? __pfx___split_vma+0x10/0x10 [ 48.616488] ? find_held_lock+0x2c/0x110 [ 48.617041] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.617639] ? lock_is_held_type+0x9f/0x120 [ 48.618212] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.618855] ? mtree_range_walk+0x632/0x900 [ 48.619442] ? mas_walk+0x5c7/0x7c0 [ 48.619918] do_vmi_munmap+0x1f1/0x2b0 [ 48.620412] mmap_region+0x1f9/0x2660 [ 48.620910] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.621423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.622134] ? __pfx_lock_acquire+0x10/0x10 [ 48.622662] ? __pfx_mmap_region+0x10/0x10 [ 48.623190] ? security_mmap_addr+0x7d/0xa0 [ 48.623730] ? get_unmapped_area+0x1f5/0x3f0 [ 48.624284] do_mmap+0x854/0xf00 [ 48.624746] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.625256] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.625822] ksys_mmap_pgoff+0x3af/0x500 [ 48.626335] do_syscall_64+0x3f/0x90 [ 48.626817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.627463] RIP: 0033:0x7f21521d3d82 [ 48.627920] 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 [ 48.630054] RSP: 002b:00007ffc0e3ff618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.630964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21521d3d82 [ 48.631807] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f215160d000 [ 48.632648] RBP: 00007f215160d000 R08: 0000000000000009 R09: 0000000000001000 [ 48.633512] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c533ca8ec0 [ 48.634356] R13: 00007ffc0e3ff630 R14: 00007ffc0e3ff660 R15: 00007ffc0e3ff9c0 [ 48.635203] [ 48.635502] [ 48.635720] Allocated by task 212: [ 48.636145] kasan_save_stack+0x22/0x50 [ 48.636646] kasan_set_track+0x25/0x30 [ 48.637144] __kasan_slab_alloc+0x59/0x70 [ 48.637667] kmem_cache_alloc+0x16b/0x370 [ 48.638183] vm_area_dup+0x20/0x160 [ 48.638651] __split_vma+0x170/0x950 [ 48.639123] split_vma+0xc6/0x110 [ 48.639566] mprotect_fixup+0x8d2/0xb30 [ 48.640075] do_mprotect_pkey+0x87e/0xd40 [ 48.640596] __x64_sys_mprotect+0x78/0xc0 [ 48.641137] do_syscall_64+0x3f/0x90 [ 48.641613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.642248] [ 48.642466] Freed by task 212: [ 48.642860] kasan_save_stack+0x22/0x50 [ 48.643374] kasan_set_track+0x25/0x30 [ 48.643863] kasan_save_free_info+0x2b/0x50 [ 48.644401] __kasan_slab_free+0x10a/0x190 [ 48.644948] kmem_cache_free+0x10d/0x4d0 [ 48.645465] rcu_core+0x8c8/0x2860 [ 48.645916] __do_softirq+0x1b7/0x7d4 [ 48.646401] [ 48.646614] Last potentially related work creation: [ 48.647196] kasan_save_stack+0x22/0x50 [ 48.647701] __kasan_record_aux_stack+0x8e/0xa0 [ 48.648278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.648944] remove_vma+0x139/0x170 [ 48.649398] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.649953] do_vmi_munmap+0x1f1/0x2b0 [ 48.650439] __vm_munmap+0x138/0x3a0 [ 48.650914] __x64_sys_munmap+0x59/0x80 [ 48.651414] do_syscall_64+0x3f/0x90 [ 48.651885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.652531] [ 48.652762] The buggy address belongs to the object at ffff8880167df910 [ 48.652762] which belongs to the cache vm_area_struct of size 168 [ 48.654226] The buggy address is located 88 bytes inside of [ 48.654226] freed 168-byte region [ffff8880167df910, ffff8880167df9b8) [ 48.655627] [ 48.655846] The buggy address belongs to the physical page: [ 48.656496] page:00000000a579a19a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167df [ 48.657593] memcg:ffff88800cb2b201 [ 48.658024] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.658674] page_type: 0xffffffff() [ 48.659121] raw: 0100000000000200 ffff88800879fc80 ffffea00003a8fc0 dead000000000008 [ 48.660041] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb2b201 [ 48.660968] page dumped because: kasan: bad access detected [ 48.661630] [ 48.661849] Memory state around the buggy address: [ 48.662431] ffff8880167df800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 48.663284] ffff8880167df880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 48.664134] >ffff8880167df900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.664992] ^ [ 48.665778] ffff8880167df980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 48.666648] ffff8880167dfa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.667511] ================================================================== [ 48.668499] Disabling lock debugging due to kernel taint [ 50.778689] BUG: Bad rss-counter state mm:000000007d27a888 type:MM_FILEPAGES val:33 [ 50.779709] BUG: Bad rss-counter state mm:000000007d27a888 type:MM_ANONPAGES val:22 [ 51.304606] BUG: Bad rss-counter state mm:000000006904441a type:MM_FILEPAGES val:33 [ 51.305802] BUG: Bad rss-counter state mm:000000006904441a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23376' (ECDSA) to the list of known hosts. 2023/06/20 00:28:30 fuzzer started 2023/06/20 00:28:30 dialing manager at localhost:44161 2023/06/20 00:28:30 checking machine... 2023/06/20 00:28:30 checking revisions... [ 51.882100] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:28:31 testing simple program... [ 51.926521] cgroup: Unknown subsys name 'net' [ 51.966277] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:28:12 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=00007f8bd804e028 CR3=000000000c78a000 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=a863ece71738eaac8c46a5a2d75bc30b XMM02=0000000000120578eff9b2d0a8fce9cb XMM03=00000000001206482c67c8bc2e329bc3 XMM04=f23cb92d79addcb700000000000ae988 XMM05=dfcdbad4f1609c370000000000135638 XMM06=806171799158d96700000000001354c0 XMM07=e042d86d42eb936e0000000000126768 XMM08=078b02b80a5647830000000000120648 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016471b40 RSI=ffffffff83c6316a RDI=ffffffff87f94830 RBP=0000000000000000 RSP=ffff88801cd976a0 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000049 R11=00000fa300000fa3 R12=0000000000000000 R13=0000000000000049 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c07eb 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 00007f989c62e900 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=00007ffcfa6fc000 CR3=000000000c6d8000 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