syzkaller login: [ 31.167885] BUG: Bad rss-counter state mm:0000000041c08143 type:MM_FILEPAGES val:33 [ 31.169126] BUG: Bad rss-counter state mm:0000000041c08143 type:MM_ANONPAGES val:22 [ 31.209670] ================================================================== [ 31.210720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.211646] Read of size 8 at addr ffff88800e037c20 by task sshd/221 [ 31.212407] [ 31.212625] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.213477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.214442] Call Trace: [ 31.214785] [ 31.215067] dump_stack_lvl+0x91/0xf0 [ 31.215564] print_report+0xcc/0x620 [ 31.216049] ? __virt_addr_valid+0x102/0x340 [ 31.216603] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217214] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217826] kasan_report+0xbe/0xf0 [ 31.218307] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.218932] vma_interval_tree_remove+0xc75/0xec0 [ 31.219536] vma_prepare+0xc54/0x11a0 [ 31.220013] __split_vma+0x5af/0x950 [ 31.220482] ? __pfx___split_vma+0x10/0x10 [ 31.221008] ? find_held_lock+0x2c/0x110 [ 31.221528] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.222091] ? lock_is_held_type+0x9f/0x120 [ 31.222661] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.223269] ? mtree_range_walk+0x632/0x900 [ 31.223821] ? mas_walk+0x5c7/0x7c0 [ 31.224295] do_vmi_munmap+0x1f1/0x2b0 [ 31.224786] mmap_region+0x1f9/0x2660 [ 31.225264] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.225774] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.226494] ? __pfx_lock_acquire+0x10/0x10 [ 31.227025] ? __pfx_mmap_region+0x10/0x10 [ 31.227557] ? security_mmap_addr+0x7d/0xa0 [ 31.228086] ? get_unmapped_area+0x1f5/0x3f0 [ 31.228634] do_mmap+0x854/0xf00 [ 31.229070] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.229563] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.230123] ksys_mmap_pgoff+0x3af/0x500 [ 31.230634] do_syscall_64+0x3f/0x90 [ 31.231111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231757] RIP: 0033:0x7f6b224d5d82 [ 31.232210] 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 [ 31.234331] RSP: 002b:00007ffec579e058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.235252] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b224d5d82 [ 31.236105] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b2190f000 [ 31.236947] RBP: 00007f6b2190f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.237800] R10: 0000000000000812 R11: 0000000000000206 R12: 000055708fedaf70 [ 31.238650] R13: 00007ffec579e070 R14: 00007ffec579e0a0 R15: 00007ffec579e400 [ 31.239508] [ 31.239804] [ 31.240018] Allocated by task 214: [ 31.240447] kasan_save_stack+0x22/0x50 [ 31.240953] kasan_set_track+0x25/0x30 [ 31.241448] __kasan_slab_alloc+0x59/0x70 [ 31.241970] kmem_cache_alloc+0x16b/0x370 [ 31.242493] vm_area_dup+0x20/0x160 [ 31.242945] __split_vma+0x170/0x950 [ 31.243414] split_vma+0xc6/0x110 [ 31.243853] mprotect_fixup+0x8d2/0xb30 [ 31.244357] do_mprotect_pkey+0x87e/0xd40 [ 31.244884] __x64_sys_mprotect+0x78/0xc0 [ 31.245401] do_syscall_64+0x3f/0x90 [ 31.245878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246537] [ 31.246757] Freed by task 214: [ 31.247152] kasan_save_stack+0x22/0x50 [ 31.247655] kasan_set_track+0x25/0x30 [ 31.248152] kasan_save_free_info+0x2b/0x50 [ 31.248688] __kasan_slab_free+0x10a/0x190 [ 31.249215] kmem_cache_free+0x10d/0x4d0 [ 31.249726] rcu_core+0x8c8/0x2860 [ 31.250168] __do_softirq+0x1b7/0x7d4 [ 31.250653] [ 31.250866] Last potentially related work creation: [ 31.251451] kasan_save_stack+0x22/0x50 [ 31.251948] __kasan_record_aux_stack+0x8e/0xa0 [ 31.252519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.253160] remove_vma+0x139/0x170 [ 31.253608] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.254165] do_vmi_munmap+0x1f1/0x2b0 [ 31.254667] __vm_munmap+0x138/0x3a0 [ 31.255141] __x64_sys_munmap+0x59/0x80 [ 31.255637] do_syscall_64+0x3f/0x90 [ 31.256111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256750] [ 31.256970] Second to last potentially related work creation: [ 31.257656] kasan_save_stack+0x22/0x50 [ 31.258157] __kasan_record_aux_stack+0x8e/0xa0 [ 31.258735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.259380] remove_vma+0x139/0x170 [ 31.259829] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.260382] do_vmi_munmap+0x1f1/0x2b0 [ 31.260870] mmap_region+0x1f9/0x2660 [ 31.261343] do_mmap+0x854/0xf00 [ 31.261773] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.262261] ksys_mmap_pgoff+0x3af/0x500 [ 31.262788] do_syscall_64+0x3f/0x90 [ 31.263278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.263920] [ 31.264135] The buggy address belongs to the object at ffff88800e037bc8 [ 31.264135] which belongs to the cache vm_area_struct of size 168 [ 31.265609] The buggy address is located 88 bytes inside of [ 31.265609] freed 168-byte region [ffff88800e037bc8, ffff88800e037c70) [ 31.267035] [ 31.267257] The buggy address belongs to the physical page: [ 31.267917] page:00000000078004c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe037 [ 31.269026] memcg:ffff88800e33d001 [ 31.269455] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.270108] page_type: 0xffffffff() [ 31.270577] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c680 dead000000000004 [ 31.271514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e33d001 [ 31.272421] page dumped because: kasan: bad access detected [ 31.273095] [ 31.273315] Memory state around the buggy address: [ 31.273916] ffff88800e037b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.274803] ffff88800e037b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.275680] >ffff88800e037c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.276541] ^ [ 31.277077] ffff88800e037c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.277954] ffff88800e037d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.278824] ================================================================== [ 31.279905] Disabling lock debugging due to kernel taint [ 32.931071] BUG: Bad rss-counter state mm:0000000009ff89c1 type:MM_FILEPAGES val:33 [ 32.931940] BUG: Bad rss-counter state mm:0000000009ff89c1 type:MM_ANONPAGES val:22 [ 33.355065] BUG: Bad rss-counter state mm:00000000c09712e0 type:MM_FILEPAGES val:33 [ 33.355752] BUG: Bad rss-counter state mm:00000000c09712e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30515' (ECDSA) to the list of known hosts. 2023/06/20 11:21:23 fuzzer started 2023/06/20 11:21:23 dialing manager at localhost:36067 2023/06/20 11:21:23 checking machine... 2023/06/20 11:21:23 checking revisions... [ 33.965106] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:21:24 testing simple program... [ 34.015889] cgroup: Unknown subsys name 'net' [ 34.072930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:21:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff0b835868 CR3=0000000005482000 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=00007f696b237510000055a7a53b4790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff818d9c08 RBX=ffffffff85e0bd20 RCX=ffffffff818d9c05 RDX=0000000000000000 RSI=ffffffff8614da06 RDI=ffffffff85e0bd18 RBP=ffffffff85e0bd18 RSP=ffff88806cf09998 R8 =ffffffff8614da06 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000244d5 R12=ffffffff85e0bd1c R13=ffffffff85e0bd18 R14=ffffffff85e0bd18 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000293 [--S-A-C] 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 00007f710365f900 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=00007f7103c170b0 CR3=000000001473c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000