syzkaller login: [ 30.588716] BUG: Bad rss-counter state mm:000000005c1437c3 type:MM_FILEPAGES val:33 [ 30.589709] BUG: Bad rss-counter state mm:000000005c1437c3 type:MM_ANONPAGES val:22 [ 30.753905] ================================================================== [ 30.755004] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.756285] Read of size 8 at addr ffff88800fc5e968 by task sshd/220 [ 30.757196] [ 30.757417] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.758336] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.759335] Call Trace: [ 30.759661] [ 30.759958] dump_stack_lvl+0x91/0xf0 [ 30.760471] print_report+0xcc/0x620 [ 30.760985] ? __virt_addr_valid+0x102/0x340 [ 30.761559] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762199] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762857] kasan_report+0xbe/0xf0 [ 30.763368] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.764029] vma_interval_tree_remove+0xc75/0xec0 [ 30.764659] vma_prepare+0xc54/0x11a0 [ 30.765157] __split_vma+0x5af/0x950 [ 30.765644] ? __pfx___split_vma+0x10/0x10 [ 30.766196] ? find_held_lock+0x2c/0x110 [ 30.766746] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.767374] ? lock_is_held_type+0x9f/0x120 [ 30.767935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.768584] ? mtree_range_walk+0x632/0x900 [ 30.769149] ? mas_walk+0x5c7/0x7c0 [ 30.769640] do_vmi_munmap+0x1f1/0x2b0 [ 30.770155] mmap_region+0x1f9/0x2660 [ 30.770653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.771193] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.771924] ? __pfx_lock_acquire+0x10/0x10 [ 30.772486] ? __pfx_mmap_region+0x10/0x10 [ 30.773040] ? security_mmap_addr+0x7d/0xa0 [ 30.773590] ? get_unmapped_area+0x1f5/0x3f0 [ 30.774164] do_mmap+0x854/0xf00 [ 30.774608] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.775117] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.775707] ksys_mmap_pgoff+0x3af/0x500 [ 30.776240] do_syscall_64+0x3f/0x90 [ 30.776750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.777418] RIP: 0033:0x7fa1be4c2d82 [ 30.777894] 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 [ 30.780158] RSP: 002b:00007ffc2e7933c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.781157] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1be4c2d82 [ 30.782052] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1bd8fc000 [ 30.782925] RBP: 00007fa1bd8fc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.783810] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563cec9a5f70 [ 30.784698] R13: 00007ffc2e7933e0 R14: 00007ffc2e793410 R15: 00007ffc2e793770 [ 30.785583] [ 30.785885] [ 30.786111] Allocated by task 213: [ 30.786565] kasan_save_stack+0x22/0x50 [ 30.787082] kasan_set_track+0x25/0x30 [ 30.787597] __kasan_slab_alloc+0x59/0x70 [ 30.788135] kmem_cache_alloc+0x16b/0x370 [ 30.788682] vm_area_dup+0x20/0x160 [ 30.789161] __split_vma+0x170/0x950 [ 30.789657] split_vma+0xc6/0x110 [ 30.790113] mprotect_fixup+0x8d2/0xb30 [ 30.790629] do_mprotect_pkey+0x87e/0xd40 [ 30.791167] __x64_sys_mprotect+0x78/0xc0 [ 30.791714] do_syscall_64+0x3f/0x90 [ 30.792204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.792894] [ 30.793120] Freed by task 213: [ 30.793522] kasan_save_stack+0x22/0x50 [ 30.794052] kasan_set_track+0x25/0x30 [ 30.794569] kasan_save_free_info+0x2b/0x50 [ 30.795126] __kasan_slab_free+0x10a/0x190 [ 30.795682] kmem_cache_free+0x10d/0x4d0 [ 30.796198] rcu_core+0x8c8/0x2860 [ 30.796663] __do_softirq+0x1b7/0x7d4 [ 30.797158] [ 30.797464] Last potentially related work creation: [ 30.798067] kasan_save_stack+0x22/0x50 [ 30.798582] __kasan_record_aux_stack+0x8e/0xa0 [ 30.799190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.799851] remove_vma+0x139/0x170 [ 30.800322] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.800905] do_vmi_munmap+0x1f1/0x2b0 [ 30.801402] __vm_munmap+0x138/0x3a0 [ 30.801891] __x64_sys_munmap+0x59/0x80 [ 30.802416] do_syscall_64+0x3f/0x90 [ 30.802911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.803574] [ 30.803788] Second to last potentially related work creation: [ 30.804509] kasan_save_stack+0x22/0x50 [ 30.805053] __kasan_record_aux_stack+0x8e/0xa0 [ 30.805642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.806321] remove_vma+0x139/0x170 [ 30.806788] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.807368] do_vmi_munmap+0x1f1/0x2b0 [ 30.807881] mmap_region+0x1f9/0x2660 [ 30.808371] do_mmap+0x854/0xf00 [ 30.808820] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.809327] ksys_mmap_pgoff+0x3af/0x500 [ 30.809844] do_syscall_64+0x3f/0x90 [ 30.810344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.811014] [ 30.811242] The buggy address belongs to the object at ffff88800fc5e910 [ 30.811242] which belongs to the cache vm_area_struct of size 168 [ 30.812720] The buggy address is located 88 bytes inside of [ 30.812720] freed 168-byte region [ffff88800fc5e910, ffff88800fc5e9b8) [ 30.814144] [ 30.814363] The buggy address belongs to the physical page: [ 30.815022] page:00000000fa847bc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc5e [ 30.816123] memcg:ffff888016990701 [ 30.816567] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.817213] page_type: 0xffffffff() [ 30.817667] raw: 0100000000000200 ffff8880087a0c80 ffffea000034f680 dead000000000002 [ 30.818590] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016990701 [ 30.819508] page dumped because: kasan: bad access detected [ 30.820165] [ 30.820382] Memory state around the buggy address: [ 30.821001] ffff88800fc5e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.821874] ffff88800fc5e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.822726] >ffff88800fc5e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.823584] ^ [ 30.824373] ffff88800fc5e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.825256] ffff88800fc5ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.826114] ================================================================== [ 30.827111] Disabling lock debugging due to kernel taint [ 32.975013] BUG: Bad rss-counter state mm:00000000279c91b8 type:MM_FILEPAGES val:33 [ 32.976201] BUG: Bad rss-counter state mm:00000000279c91b8 type:MM_ANONPAGES val:22 [ 33.557992] BUG: Bad rss-counter state mm:00000000947742eb type:MM_FILEPAGES val:33 [ 33.558680] BUG: Bad rss-counter state mm:00000000947742eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31777' (ECDSA) to the list of known hosts. 2023/06/21 08:43:05 fuzzer started 2023/06/21 08:43:06 dialing manager at localhost:36067 2023/06/21 08:43:06 checking machine... 2023/06/21 08:43:06 checking revisions... [ 34.293425] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:43:06 testing simple program... [ 34.367717] cgroup: Unknown subsys name 'net' [ 34.448509] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:43:05 Registers: info registers vcpu 0 RAX=ffff888009475ec0 RBX=ffff888008d9fdc8 RCX=1ffff1100128ebd8 RDX=ffff88800ed6cd90 RSI=0000000000000008 RDI=ffff888008d9fdd8 RBP=0000000000000001 RSP=ffff888008d9fd30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008d9fdc8 R14=ffff88806ce35000 R15=ffff88800db6f670 RIP=ffffffff8137fcd9 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 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=00005637e0202000 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=00007f6d59d21510000055c766068790 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=ffffffff85dfe608 RBX=ffffffff85dfe5ec RCX=ffffffff8180f5ba RDX=0000000000000000 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5f0 RSP=ffff888008e37870 R8 =ffffffff8613971a R9 =ffff888008e37968 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe608 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5ec R15=dffffc0000000000 RIP=ffffffff8112fc5a RFL=00000206 [-----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 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=00007f00518c7650 CR3=000000001ca82000 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=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