Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.734926] BUG: Bad rss-counter state mm:00000000ed196b47 type:MM_FILEPAGES val:33 [ 30.736145] BUG: Bad rss-counter state mm:00000000ed196b47 type:MM_ANONPAGES val:22 [ 30.774022] ================================================================== [ 30.775076] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.776187] Read of size 8 at addr ffff888016ace228 by task sshd/219 [ 30.777098] [ 30.777351] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.778324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.779477] Call Trace: [ 30.779809] [ 30.780101] dump_stack_lvl+0x91/0xf0 [ 30.780729] print_report+0xcc/0x620 [ 30.781223] ? __virt_addr_valid+0x102/0x340 [ 30.781794] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782425] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783050] kasan_report+0xbe/0xf0 [ 30.783565] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784198] vma_interval_tree_remove+0xc75/0xec0 [ 30.784830] vma_prepare+0xc54/0x11a0 [ 30.785316] __split_vma+0x5af/0x950 [ 30.785794] ? __pfx___split_vma+0x10/0x10 [ 30.786335] ? find_held_lock+0x2c/0x110 [ 30.786876] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.787468] ? lock_is_held_type+0x9f/0x120 [ 30.788026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.788654] ? mtree_range_walk+0x632/0x900 [ 30.789220] ? mas_walk+0x5c7/0x7c0 [ 30.789708] do_vmi_munmap+0x1f1/0x2b0 [ 30.790212] mmap_region+0x1f9/0x2660 [ 30.790708] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.791298] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.792276] ? __pfx_lock_acquire+0x10/0x10 [ 30.792989] ? __pfx_mmap_region+0x10/0x10 [ 30.793700] ? security_mmap_addr+0x7d/0xa0 [ 30.794400] ? get_unmapped_area+0x1f5/0x3f0 [ 30.794993] do_mmap+0x854/0xf00 [ 30.795481] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.795990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.796576] ksys_mmap_pgoff+0x3af/0x500 [ 30.797092] do_syscall_64+0x3f/0x90 [ 30.797609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798268] RIP: 0033:0x7ffbb2e3dd82 [ 30.798753] 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 [ 30.800973] RSP: 002b:00007ffd5e272848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.801905] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffbb2e3dd82 [ 30.802806] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffbb2277000 [ 30.803722] RBP: 00007ffbb2277000 R08: 0000000000000009 R09: 0000000000001000 [ 30.804591] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a69e102ec0 [ 30.805453] R13: 00007ffd5e272860 R14: 00007ffd5e272890 R15: 00007ffd5e272bf0 [ 30.806310] [ 30.806620] [ 30.806834] Allocated by task 212: [ 30.807266] kasan_save_stack+0x22/0x50 [ 30.807822] kasan_set_track+0x25/0x30 [ 30.808327] __kasan_slab_alloc+0x59/0x70 [ 30.808887] kmem_cache_alloc+0x16b/0x370 [ 30.809411] vm_area_dup+0x20/0x160 [ 30.809875] __split_vma+0x170/0x950 [ 30.810372] split_vma+0xc6/0x110 [ 30.810822] mprotect_fixup+0x8d2/0xb30 [ 30.811335] do_mprotect_pkey+0x87e/0xd40 [ 30.811889] __x64_sys_mprotect+0x78/0xc0 [ 30.812421] do_syscall_64+0x3f/0x90 [ 30.812918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813581] [ 30.813802] Freed by task 212: [ 30.814200] kasan_save_stack+0x22/0x50 [ 30.814721] kasan_set_track+0x25/0x30 [ 30.815225] kasan_save_free_info+0x2b/0x50 [ 30.815777] __kasan_slab_free+0x10a/0x190 [ 30.816323] kmem_cache_free+0x10d/0x4d0 [ 30.816836] rcu_core+0x8c8/0x2860 [ 30.817288] __do_softirq+0x1b7/0x7d4 [ 30.817779] [ 30.818002] Last potentially related work creation: [ 30.818603] kasan_save_stack+0x22/0x50 [ 30.819174] __kasan_record_aux_stack+0x8e/0xa0 [ 30.819772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.820424] remove_vma+0x139/0x170 [ 30.820880] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821444] do_vmi_munmap+0x1f1/0x2b0 [ 30.821943] __vm_munmap+0x138/0x3a0 [ 30.822415] __x64_sys_munmap+0x59/0x80 [ 30.822922] do_syscall_64+0x3f/0x90 [ 30.823412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824072] [ 30.824290] The buggy address belongs to the object at ffff888016ace1d0 [ 30.824290] which belongs to the cache vm_area_struct of size 168 [ 30.825780] The buggy address is located 88 bytes inside of [ 30.825780] freed 168-byte region [ffff888016ace1d0, ffff888016ace278) [ 30.827208] [ 30.827436] The buggy address belongs to the physical page: [ 30.828108] page:00000000a77ce689 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ace [ 30.829203] memcg:ffff888008ec8a01 [ 30.829640] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.830294] page_type: 0xffffffff() [ 30.830749] raw: 0100000000000200 ffff8880087a0c80 ffffea00005ab2c0 000000000000000c [ 30.831697] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008ec8a01 [ 30.832618] page dumped because: kasan: bad access detected [ 30.833296] [ 30.833520] Memory state around the buggy address: [ 30.834102] ffff888016ace100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.834967] ffff888016ace180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.835843] >ffff888016ace200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.836712] ^ [ 30.837275] ffff888016ace280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.838131] ffff888016ace300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.838985] ================================================================== [ 30.839994] Disabling lock debugging due to kernel taint [ 32.886069] BUG: Bad rss-counter state mm:00000000f795d383 type:MM_FILEPAGES val:33 [ 32.887326] BUG: Bad rss-counter state mm:00000000f795d383 type:MM_ANONPAGES val:22 [ 33.370606] BUG: Bad rss-counter state mm:00000000b037b1cb type:MM_FILEPAGES val:33 [ 33.371638] BUG: Bad rss-counter state mm:00000000b037b1cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32331' (ECDSA) to the list of known hosts. 2023/06/20 20:16:05 fuzzer started 2023/06/20 20:16:05 dialing manager at localhost:36067 2023/06/20 20:16:05 checking machine... 2023/06/20 20:16:05 checking revisions... [ 34.074338] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:16:05 testing simple program... [ 34.103866] cgroup: Unknown subsys name 'net' [ 34.152097] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:16:04 Registers: info registers vcpu 0 RAX=1ffffffff0bb7aff RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88806ce099e0 R8 =ffffffff860d8256 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f2d30cd5900 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=00007f2d3128a650 CR3=00000000147a6000 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=0000000000000001 RBX=0000000000000282 RCX=00000000800d000c RDX=0000000000000001 RSI=ffffea0000265140 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff8880146df5f0 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000265140 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea0000265140 R14=ffff88800844f780 R15=0000000000000001 RIP=ffffffff81806246 RFL=00000082 [--S----] 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 00007fbdbc133900 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=00007fbdbb548a00 CR3=000000000d69e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=43d6a41ff107396b00000000000ae988 XMM05=c226ad21531a9aba00000000001328c8 XMM06=806171799158d9670000000000131348 XMM07=fb795ef6d657705600000000001218b8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000