syzkaller login: [ 36.648154] sshd (213) used greatest stack depth: 24128 bytes left [ 36.650100] BUG: Bad rss-counter state mm:00000000bf6667df type:MM_FILEPAGES val:33 [ 36.651861] BUG: Bad rss-counter state mm:00000000bf6667df type:MM_ANONPAGES val:22 [ 36.808507] ================================================================== [ 36.809469] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.810519] Read of size 8 at addr ffff88800e9a0880 by task sshd/220 [ 36.811358] [ 36.811572] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.812403] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.813391] Call Trace: [ 36.813701] [ 36.813977] dump_stack_lvl+0x91/0xf0 [ 36.814463] print_report+0xcc/0x620 [ 36.814937] ? __virt_addr_valid+0x102/0x340 [ 36.815472] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.816073] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.816691] kasan_report+0xbe/0xf0 [ 36.817154] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.817753] vma_interval_tree_remove+0xc75/0xec0 [ 36.818333] vma_prepare+0xc54/0x11a0 [ 36.818798] __split_vma+0x5af/0x950 [ 36.819252] ? __pfx___split_vma+0x10/0x10 [ 36.819763] ? find_held_lock+0x2c/0x110 [ 36.820263] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.820833] ? lock_is_held_type+0x9f/0x120 [ 36.821368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.822004] ? mtree_range_walk+0x632/0x900 [ 36.822596] ? mas_walk+0x5c7/0x7c0 [ 36.823116] do_vmi_munmap+0x1f1/0x2b0 [ 36.823635] mmap_region+0x1f9/0x2660 [ 36.824156] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.824742] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.825489] ? __pfx_lock_acquire+0x10/0x10 [ 36.826059] ? __pfx_mmap_region+0x10/0x10 [ 36.826615] ? security_mmap_addr+0x7d/0xa0 [ 36.827189] ? get_unmapped_area+0x1f5/0x3f0 [ 36.827782] do_mmap+0x854/0xf00 [ 36.828236] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.828811] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.829454] ksys_mmap_pgoff+0x3af/0x500 [ 36.830042] do_syscall_64+0x3f/0x90 [ 36.830576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.831315] RIP: 0033:0x7f88d137cd82 [ 36.831848] 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 [ 36.834360] RSP: 002b:00007ffefd8aa128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.835407] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88d137cd82 [ 36.836400] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88d07b6000 [ 36.837419] RBP: 00007f88d07b6000 R08: 0000000000000009 R09: 0000000000001000 [ 36.838401] R10: 0000000000000812 R11: 0000000000000206 R12: 000056520711ab20 [ 36.839387] R13: 00007ffefd8aa140 R14: 00007ffefd8aa170 R15: 00007ffefd8aa4d0 [ 36.840371] [ 36.840724] [ 36.840952] Allocated by task 213: [ 36.841447] kasan_save_stack+0x22/0x50 [ 36.841992] kasan_set_track+0x25/0x30 [ 36.842563] __kasan_slab_alloc+0x59/0x70 [ 36.843169] kmem_cache_alloc+0x16b/0x370 [ 36.843773] vm_area_dup+0x20/0x160 [ 36.844295] __split_vma+0x170/0x950 [ 36.844834] split_vma+0xc6/0x110 [ 36.845342] mprotect_fixup+0x8d2/0xb30 [ 36.845879] do_mprotect_pkey+0x87e/0xd40 [ 36.846429] __x64_sys_mprotect+0x78/0xc0 [ 36.846988] do_syscall_64+0x3f/0x90 [ 36.847492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.848192] [ 36.848429] Freed by task 13: [ 36.848866] kasan_save_stack+0x22/0x50 [ 36.849416] kasan_set_track+0x25/0x30 [ 36.849945] kasan_save_free_info+0x2b/0x50 [ 36.850508] __kasan_slab_free+0x10a/0x190 [ 36.851080] kmem_cache_free+0x10d/0x4d0 [ 36.851632] rcu_core+0x8c8/0x2860 [ 36.852118] __do_softirq+0x1b7/0x7d4 [ 36.852654] [ 36.852888] Last potentially related work creation: [ 36.853510] kasan_save_stack+0x22/0x50 [ 36.854040] __kasan_record_aux_stack+0x8e/0xa0 [ 36.854652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.855339] remove_vma+0x139/0x170 [ 36.855814] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.856415] do_vmi_munmap+0x1f1/0x2b0 [ 36.856948] __vm_munmap+0x138/0x3a0 [ 36.857443] __x64_sys_munmap+0x59/0x80 [ 36.857983] do_syscall_64+0x3f/0x90 [ 36.858478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.859166] [ 36.859406] Second to last potentially related work creation: [ 36.860147] kasan_save_stack+0x22/0x50 [ 36.860697] __kasan_record_aux_stack+0x8e/0xa0 [ 36.861304] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.861987] remove_vma+0x139/0x170 [ 36.862461] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.863053] do_vmi_munmap+0x1f1/0x2b0 [ 36.863582] mmap_region+0x1f9/0x2660 [ 36.864094] do_mmap+0x854/0xf00 [ 36.864582] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.865097] ksys_mmap_pgoff+0x7d/0x500 [ 36.865620] do_syscall_64+0x3f/0x90 [ 36.866120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.866823] [ 36.867053] The buggy address belongs to the object at ffff88800e9a0828 [ 36.867053] which belongs to the cache vm_area_struct of size 168 [ 36.868619] The buggy address is located 88 bytes inside of [ 36.868619] freed 168-byte region [ffff88800e9a0828, ffff88800e9a08d0) [ 36.870108] [ 36.870340] The buggy address belongs to the physical page: [ 36.871039] page:000000006baa2a4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9a0 [ 36.872189] memcg:ffff888015f42701 [ 36.872658] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.873393] page_type: 0xffffffff() [ 36.873874] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.874853] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f42701 [ 36.875818] page dumped because: kasan: bad access detected [ 36.876529] [ 36.876752] Memory state around the buggy address: [ 36.877384] ffff88800e9a0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.878287] ffff88800e9a0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.879217] >ffff88800e9a0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.880140] ^ [ 36.880614] ffff88800e9a0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.881602] ffff88800e9a0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 36.882573] ================================================================== [ 36.883818] Disabling lock debugging due to kernel taint [ 39.647082] BUG: Bad rss-counter state mm:000000005c74a800 type:MM_FILEPAGES val:33 [ 39.648074] BUG: Bad rss-counter state mm:000000005c74a800 type:MM_ANONPAGES val:22 [ 40.098137] BUG: Bad rss-counter state mm:0000000090ca53a9 type:MM_FILEPAGES val:33 [ 40.099358] BUG: Bad rss-counter state mm:0000000090ca53a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35322' (ECDSA) to the list of known hosts. 2023/06/19 18:28:37 fuzzer started 2023/06/19 18:28:37 dialing manager at localhost:44161 2023/06/19 18:28:37 checking machine... 2023/06/19 18:28:37 checking revisions... [ 40.730954] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:28:37 testing simple program... [ 40.795998] cgroup: Unknown subsys name 'net' [ 40.856868] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:28:36 Registers: info registers vcpu 0 RAX=1ffff11001d6a4f7 RBX=ffff88800eb52788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800eb527b8 RBP=ffff8880190762f0 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff8880190762f0 R14=ffffffff813782a8 R15=ffff888019e6b280 RIP=ffffffff8184636c 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 00007f64c83ee900 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=00007f64c89a5618 CR3=0000000015e74000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007faf87d29250 CR3=0000000018226000 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=2036333a38323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a38323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000