syzkaller login: [ 30.274091] sshd (213) used greatest stack depth: 24128 bytes left [ 30.276199] BUG: Bad rss-counter state mm:00000000847227ae type:MM_FILEPAGES val:33 [ 30.277575] BUG: Bad rss-counter state mm:00000000847227ae type:MM_ANONPAGES val:22 [ 30.443234] ================================================================== [ 30.444528] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.446027] Read of size 8 at addr ffff88801a0d5310 by task sshd/220 [ 30.447122] [ 30.447432] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.448675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.449792] Call Trace: [ 30.450148] [ 30.450465] dump_stack_lvl+0x91/0xf0 [ 30.451018] print_report+0xcc/0x620 [ 30.451563] ? __virt_addr_valid+0x102/0x340 [ 30.452260] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.453140] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.454018] kasan_report+0xbe/0xf0 [ 30.454684] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.455561] vma_interval_tree_remove+0xc75/0xec0 [ 30.456415] vma_prepare+0xc54/0x11a0 [ 30.457079] __split_vma+0x5af/0x950 [ 30.457741] ? __pfx___split_vma+0x10/0x10 [ 30.458491] ? find_held_lock+0x2c/0x110 [ 30.459221] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.460012] ? lock_is_held_type+0x9f/0x120 [ 30.460780] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.461638] ? mtree_range_walk+0x632/0x900 [ 30.462411] ? mas_walk+0x5c7/0x7c0 [ 30.463063] do_vmi_munmap+0x1f1/0x2b0 [ 30.463751] mmap_region+0x1f9/0x2660 [ 30.464432] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.465137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.466173] ? __pfx_lock_acquire+0x10/0x10 [ 30.466929] ? __pfx_mmap_region+0x10/0x10 [ 30.467666] ? security_mmap_addr+0x7d/0xa0 [ 30.468402] ? get_unmapped_area+0x1f5/0x3f0 [ 30.469176] do_mmap+0x854/0xf00 [ 30.469788] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.470470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.471263] ksys_mmap_pgoff+0x3af/0x500 [ 30.471990] do_syscall_64+0x3f/0x90 [ 30.472651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.473553] RIP: 0033:0x7fa129843d82 [ 30.474203] 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 [ 30.477213] RSP: 002b:00007ffc3fe70948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.478516] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa129843d82 [ 30.479736] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa128c7d000 [ 30.480934] RBP: 00007fa128c7d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.482137] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b4d808f70 [ 30.483354] R13: 00007ffc3fe70960 R14: 00007ffc3fe70990 R15: 00007ffc3fe70cf0 [ 30.484594] [ 30.485004] [ 30.485300] Allocated by task 213: [ 30.485928] kasan_save_stack+0x22/0x50 [ 30.486638] kasan_set_track+0x25/0x30 [ 30.487398] __kasan_slab_alloc+0x59/0x70 [ 30.488132] kmem_cache_alloc+0x16b/0x370 [ 30.488865] vm_area_dup+0x20/0x160 [ 30.489505] __split_vma+0x170/0x950 [ 30.490185] split_vma+0xc6/0x110 [ 30.490808] mprotect_fixup+0x8d2/0xb30 [ 30.491497] do_mprotect_pkey+0x87e/0xd40 [ 30.492222] __x64_sys_mprotect+0x78/0xc0 [ 30.492942] do_syscall_64+0x3f/0x90 [ 30.493618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.494534] [ 30.494833] Freed by task 213: [ 30.495385] kasan_save_stack+0x22/0x50 [ 30.496096] kasan_set_track+0x25/0x30 [ 30.496793] kasan_save_free_info+0x2b/0x50 [ 30.497567] __kasan_slab_free+0x10a/0x190 [ 30.498324] kmem_cache_free+0x10d/0x4d0 [ 30.499036] rcu_core+0x8c8/0x2860 [ 30.499669] __do_softirq+0x1b7/0x7d4 [ 30.500346] [ 30.500640] Last potentially related work creation: [ 30.501464] kasan_save_stack+0x22/0x50 [ 30.501989] __kasan_record_aux_stack+0x8e/0xa0 [ 30.502402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.502832] remove_vma+0x139/0x170 [ 30.503136] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.503494] do_vmi_munmap+0x1f1/0x2b0 [ 30.503811] __vm_munmap+0x138/0x3a0 [ 30.504115] __x64_sys_munmap+0x59/0x80 [ 30.504437] do_syscall_64+0x3f/0x90 [ 30.504748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.505186] [ 30.505327] Second to last potentially related work creation: [ 30.505814] kasan_save_stack+0x22/0x50 [ 30.506144] __kasan_record_aux_stack+0x8e/0xa0 [ 30.506516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.506940] remove_vma+0x139/0x170 [ 30.507232] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.507602] do_vmi_munmap+0x1f1/0x2b0 [ 30.507922] mmap_region+0x1f9/0x2660 [ 30.508236] do_mmap+0x854/0xf00 [ 30.508513] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.508829] ksys_mmap_pgoff+0x3af/0x500 [ 30.509153] do_syscall_64+0x3f/0x90 [ 30.509465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.509887] [ 30.510027] The buggy address belongs to the object at ffff88801a0d52b8 [ 30.510027] which belongs to the cache vm_area_struct of size 168 [ 30.510988] The buggy address is located 88 bytes inside of [ 30.510988] freed 168-byte region [ffff88801a0d52b8, ffff88801a0d5360) [ 30.511903] [ 30.512042] The buggy address belongs to the physical page: [ 30.512470] page:00000000da60920c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0d5 [ 30.513187] memcg:ffff888019f31b01 [ 30.513462] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.513919] page_type: 0xffffffff() [ 30.514210] raw: 0100000000000200 ffff8880087a0c80 ffffea000067c880 dead000000000003 [ 30.514794] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f31b01 [ 30.515376] page dumped because: kasan: bad access detected [ 30.515802] [ 30.515937] Memory state around the buggy address: [ 30.516312] ffff88801a0d5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.516861] ffff88801a0d5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.517419] >ffff88801a0d5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.517988] ^ [ 30.518292] ffff88801a0d5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.518838] ffff88801a0d5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.519380] ================================================================== [ 30.520135] Disabling lock debugging due to kernel taint [ 32.975588] BUG: Bad rss-counter state mm:000000002937d297 type:MM_FILEPAGES val:33 [ 32.976748] BUG: Bad rss-counter state mm:000000002937d297 type:MM_ANONPAGES val:22 [ 33.460663] BUG: Bad rss-counter state mm:00000000b8adabad type:MM_FILEPAGES val:33 [ 33.461817] BUG: Bad rss-counter state mm:00000000b8adabad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44683' (ECDSA) to the list of known hosts. 2023/06/20 10:50:56 fuzzer started 2023/06/20 10:50:57 dialing manager at localhost:36067 2023/06/20 10:50:57 checking machine... 2023/06/20 10:50:57 checking revisions... [ 34.191687] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:50:57 testing simple program... [ 34.245282] cgroup: Unknown subsys name 'net' [ 34.304767] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:50:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801654f370 RCX=ffffffff863ddee4 RDX=1ffff11002ca9e6e RSI=ffff88801654fb18 RDI=ffff88801654f370 RBP=ffff88801654fb18 RSP=ffff88801654f2c8 R8 =ffffffff863ddee8 R9 =ffff88801654f3b0 R10=0000000000038001 R11=0000000000091afa R12=0000000000000008 R13=ffff88801654f3b8 R14=ffff88801654fb20 R15=ffff88801654f370 RIP=ffffffff8113041a RFL=00000292 [--S-A--] 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 00007efe95afc900 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=00007efe960b3618 CR3=000000000ebc8000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f7f5c160350 CR3=000000000ca04000 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=01e43c6f105151a2084ad0906d154133 XMM02=000000000011b9e8eff9b2d0a8fce9cb XMM03=000000000011bab82c67c8bc2e329bc3 XMM04=333162a9604af66400000000000ae988 XMM05=19e9129bd510f2350000000000133700 XMM06=90d73a13db3f92ed0000000000132568 XMM07=e042d86d42eb936e00000000001226b0 XMM08=c263b86ce9c4da3b000000000011bab8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000