syzkaller login: [ 30.565858] BUG: Bad rss-counter state mm:000000007ff85109 type:MM_FILEPAGES val:33 [ 30.566555] BUG: Bad rss-counter state mm:000000007ff85109 type:MM_ANONPAGES val:22 [ 30.731808] ================================================================== [ 30.732878] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.734121] Read of size 8 at addr ffff88800df094e0 by task sshd/220 [ 30.734961] [ 30.735178] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.736054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.737039] Call Trace: [ 30.737358] [ 30.737659] dump_stack_lvl+0x91/0xf0 [ 30.738155] print_report+0xcc/0x620 [ 30.738642] ? __virt_addr_valid+0x102/0x340 [ 30.739195] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739822] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740446] kasan_report+0xbe/0xf0 [ 30.740929] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741564] vma_interval_tree_remove+0xc75/0xec0 [ 30.742178] vma_prepare+0xc54/0x11a0 [ 30.742661] __split_vma+0x5af/0x950 [ 30.743143] ? __pfx___split_vma+0x10/0x10 [ 30.743681] ? find_held_lock+0x2c/0x110 [ 30.744201] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.744776] ? lock_is_held_type+0x9f/0x120 [ 30.745322] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.745960] ? mtree_range_walk+0x632/0x900 [ 30.746512] ? mas_walk+0x5c7/0x7c0 [ 30.746992] do_vmi_munmap+0x1f1/0x2b0 [ 30.747498] mmap_region+0x1f9/0x2660 [ 30.747980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.748502] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.749219] ? __pfx_lock_acquire+0x10/0x10 [ 30.749768] ? __pfx_mmap_region+0x10/0x10 [ 30.750305] ? security_mmap_addr+0x7d/0xa0 [ 30.750834] ? get_unmapped_area+0x1f5/0x3f0 [ 30.751381] do_mmap+0x854/0xf00 [ 30.751825] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.752329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.752897] ksys_mmap_pgoff+0x3af/0x500 [ 30.753432] do_syscall_64+0x3f/0x90 [ 30.753910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754569] RIP: 0033:0x7f881ecd2d82 [ 30.755026] 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 [ 30.757185] RSP: 002b:00007fff405e7938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.758107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f881ecd2d82 [ 30.758969] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f881e10c000 [ 30.759830] RBP: 00007f881e10c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.760682] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a267dfdd90 [ 30.761551] R13: 00007fff405e7950 R14: 00007fff405e7980 R15: 00007fff405e7ce0 [ 30.762413] [ 30.762704] [ 30.762923] Allocated by task 213: [ 30.763357] kasan_save_stack+0x22/0x50 [ 30.763873] kasan_set_track+0x25/0x30 [ 30.764373] __kasan_slab_alloc+0x59/0x70 [ 30.764897] kmem_cache_alloc+0x16b/0x370 [ 30.765441] vm_area_dup+0x20/0x160 [ 30.765901] __split_vma+0x170/0x950 [ 30.766374] split_vma+0xc6/0x110 [ 30.766821] mprotect_fixup+0x8d2/0xb30 [ 30.767327] do_mprotect_pkey+0x87e/0xd40 [ 30.767853] __x64_sys_mprotect+0x78/0xc0 [ 30.768382] do_syscall_64+0x3f/0x90 [ 30.768868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769526] [ 30.769747] Freed by task 213: [ 30.770145] kasan_save_stack+0x22/0x50 [ 30.770656] kasan_set_track+0x25/0x30 [ 30.771155] kasan_save_free_info+0x2b/0x50 [ 30.771694] __kasan_slab_free+0x10a/0x190 [ 30.772233] kmem_cache_free+0x10d/0x4d0 [ 30.772741] rcu_core+0x8c8/0x2860 [ 30.773187] __do_softirq+0x1b7/0x7d4 [ 30.773701] [ 30.773921] Last potentially related work creation: [ 30.774511] kasan_save_stack+0x22/0x50 [ 30.775021] __kasan_record_aux_stack+0x8e/0xa0 [ 30.775602] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.776256] remove_vma+0x139/0x170 [ 30.776719] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.777276] do_vmi_munmap+0x1f1/0x2b0 [ 30.777775] __vm_munmap+0x138/0x3a0 [ 30.778239] __x64_sys_munmap+0x59/0x80 [ 30.778737] do_syscall_64+0x3f/0x90 [ 30.779213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779862] [ 30.780082] Second to last potentially related work creation: [ 30.780770] kasan_save_stack+0x22/0x50 [ 30.781277] __kasan_record_aux_stack+0x8e/0xa0 [ 30.781869] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.782522] remove_vma+0x139/0x170 [ 30.782981] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.783547] do_vmi_munmap+0x1f1/0x2b0 [ 30.784044] mmap_region+0x1f9/0x2660 [ 30.784536] do_mmap+0x854/0xf00 [ 30.784972] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785467] ksys_mmap_pgoff+0x3af/0x500 [ 30.785972] do_syscall_64+0x3f/0x90 [ 30.786446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787099] [ 30.787317] The buggy address belongs to the object at ffff88800df09488 [ 30.787317] which belongs to the cache vm_area_struct of size 168 [ 30.788790] The buggy address is located 88 bytes inside of [ 30.788790] freed 168-byte region [ffff88800df09488, ffff88800df09530) [ 30.790201] [ 30.790422] The buggy address belongs to the physical page: [ 30.791103] page:00000000f241e0f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf09 [ 30.792198] memcg:ffff88800d695d01 [ 30.792635] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.793347] page_type: 0xffffffff() [ 30.793810] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.794726] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d695d01 [ 30.795631] page dumped because: kasan: bad access detected [ 30.796300] [ 30.796515] Memory state around the buggy address: [ 30.797097] ffff88800df09380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.797969] ffff88800df09400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.798828] >ffff88800df09480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.799688] ^ [ 30.800446] ffff88800df09500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.801315] ffff88800df09580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.802192] ================================================================== [ 30.803425] Disabling lock debugging due to kernel taint [ 33.592052] BUG: Bad rss-counter state mm:00000000f88512e1 type:MM_FILEPAGES val:33 [ 33.592980] BUG: Bad rss-counter state mm:00000000f88512e1 type:MM_ANONPAGES val:22 [ 34.075118] BUG: Bad rss-counter state mm:0000000099ee0706 type:MM_FILEPAGES val:33 [ 34.076098] BUG: Bad rss-counter state mm:0000000099ee0706 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20129' (ECDSA) to the list of known hosts. 2023/06/19 19:39:22 fuzzer started 2023/06/19 19:39:23 dialing manager at localhost:44161 2023/06/19 19:39:23 checking machine... 2023/06/19 19:39:23 checking revisions... [ 34.812007] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:39:23 testing simple program... [ 34.863117] cgroup: Unknown subsys name 'net' [ 34.900436] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:39:22 Registers: info registers vcpu 0 RAX=1ffff11001fed2f7 RBX=ffff88800ff69788 RCX=1ffff11001350d6a RDX=dffffc0000000000 RSI=ffff8880199f6140 RDI=ffff88800ff697b8 RBP=ffff888019ff59f8 RSP=ffff88800ff17cd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880199f5c00 R13=0000000000000000 R14=ffff88800e7ce508 R15=ffff88800e7ce4c0 RIP=ffffffff818474fe RFL=00000046 [---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 00007f1f22950900 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=00007f1f22f05650 CR3=000000000da58000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffdc2aff7f8 CR3=000000000ec1e000 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=2032323a39333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a39333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000