[ 31.604741] BUG: Bad rss-counter state mm:000000007533302f type:MM_FILEPAGES val:33 [ 31.606001] BUG: Bad rss-counter state mm:000000007533302f type:MM_ANONPAGES val:22 [ 31.771052] ================================================================== [ 31.772323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.773571] Read of size 8 at addr ffff88800e57e058 by task sshd/219 [ 31.774503] [ 31.774776] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.775871] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.777068] Call Trace: [ 31.777466] [ 31.777821] dump_stack_lvl+0x91/0xf0 [ 31.778430] print_report+0xcc/0x620 [ 31.779018] ? __virt_addr_valid+0x102/0x340 [ 31.779728] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.780490] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.781244] kasan_report+0xbe/0xf0 [ 31.781825] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.782588] vma_interval_tree_remove+0xc75/0xec0 [ 31.783327] vma_prepare+0xc54/0x11a0 [ 31.783929] __split_vma+0x5af/0x950 [ 31.784499] ? __pfx___split_vma+0x10/0x10 [ 31.785141] ? find_held_lock+0x2c/0x110 [ 31.785778] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.786476] ? lock_is_held_type+0x9f/0x120 [ 31.787144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.787908] ? mtree_range_walk+0x632/0x900 [ 31.788433] ? mas_walk+0x5c7/0x7c0 [ 31.788887] do_vmi_munmap+0x1f1/0x2b0 [ 31.789358] mmap_region+0x1f9/0x2660 [ 31.789821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.790314] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.790996] ? __pfx_lock_acquire+0x10/0x10 [ 31.791522] ? __pfx_mmap_region+0x10/0x10 [ 31.792029] ? security_mmap_addr+0x7d/0xa0 [ 31.792528] ? get_unmapped_area+0x1f5/0x3f0 [ 31.793051] do_mmap+0x854/0xf00 [ 31.793467] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.793935] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.794469] ksys_mmap_pgoff+0x3af/0x500 [ 31.794952] do_syscall_64+0x3f/0x90 [ 31.795425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.796035] RIP: 0033:0x7f936a2abd82 [ 31.796470] 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 [ 31.798458] RSP: 002b:00007ffff9d93cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.799396] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f936a2abd82 [ 31.800385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f93696e5000 [ 31.801370] RBP: 00007f93696e5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.802366] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602166aaec0 [ 31.803371] R13: 00007ffff9d93cf0 R14: 00007ffff9d93d20 R15: 00007ffff9d94080 [ 31.804378] [ 31.804719] [ 31.804967] Allocated by task 211: [ 31.805463] kasan_save_stack+0x22/0x50 [ 31.806048] kasan_set_track+0x25/0x30 [ 31.806617] __kasan_slab_alloc+0x59/0x70 [ 31.807230] kmem_cache_alloc+0x16b/0x370 [ 31.807842] vm_area_dup+0x20/0x160 [ 31.808366] __split_vma+0x170/0x950 [ 31.808906] split_vma+0xc6/0x110 [ 31.809413] mprotect_fixup+0x8d2/0xb30 [ 31.809995] do_mprotect_pkey+0x87e/0xd40 [ 31.810599] __x64_sys_mprotect+0x78/0xc0 [ 31.811202] do_syscall_64+0x3f/0x90 [ 31.811766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.812509] [ 31.812760] Freed by task 211: [ 31.813220] kasan_save_stack+0x22/0x50 [ 31.813803] kasan_set_track+0x25/0x30 [ 31.814374] kasan_save_free_info+0x2b/0x50 [ 31.814992] __kasan_slab_free+0x10a/0x190 [ 31.815638] kmem_cache_free+0x10d/0x4d0 [ 31.816225] rcu_core+0x8c8/0x2860 [ 31.816741] __do_softirq+0x1b7/0x7d4 [ 31.817294] [ 31.817564] Last potentially related work creation: [ 31.818244] kasan_save_stack+0x22/0x50 [ 31.818834] __kasan_record_aux_stack+0x8e/0xa0 [ 31.819508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.820247] remove_vma+0x139/0x170 [ 31.820761] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.821380] do_vmi_munmap+0x1f1/0x2b0 [ 31.821941] __vm_munmap+0x138/0x3a0 [ 31.822463] __x64_sys_munmap+0x59/0x80 [ 31.823014] do_syscall_64+0x3f/0x90 [ 31.823556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.824276] [ 31.824516] Second to last potentially related work creation: [ 31.825280] kasan_save_stack+0x22/0x50 [ 31.825848] __kasan_record_aux_stack+0x8e/0xa0 [ 31.826490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.827215] remove_vma+0x139/0x170 [ 31.827737] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.828359] do_vmi_munmap+0x1f1/0x2b0 [ 31.828897] mmap_region+0x1f9/0x2660 [ 31.829428] do_mmap+0x854/0xf00 [ 31.829904] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.830449] ksys_mmap_pgoff+0x3af/0x500 [ 31.831006] do_syscall_64+0x3f/0x90 [ 31.831548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.832258] [ 31.832500] The buggy address belongs to the object at ffff88800e57e000 [ 31.832500] which belongs to the cache vm_area_struct of size 168 [ 31.834134] The buggy address is located 88 bytes inside of [ 31.834134] freed 168-byte region [ffff88800e57e000, ffff88800e57e0a8) [ 31.835720] [ 31.835962] The buggy address belongs to the physical page: [ 31.836693] page:00000000d32f7ffa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe57e [ 31.837891] memcg:ffff88800ca56f01 [ 31.838369] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.839148] page_type: 0xffffffff() [ 31.839660] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.840682] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca56f01 [ 31.841685] page dumped because: kasan: bad access detected [ 31.842460] [ 31.842706] Memory state around the buggy address: [ 31.843370] ffff88800e57df00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.844323] ffff88800e57df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.845306] >ffff88800e57e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.846286] ^ [ 31.847114] ffff88800e57e080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.848102] ffff88800e57e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.849060] ================================================================== [ 31.850234] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.523739] BUG: Bad rss-counter state mm:00000000f9ca0009 type:MM_FILEPAGES val:33 [ 34.524902] BUG: Bad rss-counter state mm:00000000f9ca0009 type:MM_ANONPAGES val:22 [ 35.014902] BUG: Bad rss-counter state mm:00000000c5beb16b type:MM_FILEPAGES val:33 [ 35.015953] BUG: Bad rss-counter state mm:00000000c5beb16b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14077' (ECDSA) to the list of known hosts. 2023/06/20 10:53:07 fuzzer started 2023/06/20 10:53:07 dialing manager at localhost:36067 2023/06/20 10:53:07 checking machine... 2023/06/20 10:53:07 checking revisions... [ 35.734335] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:53:07 testing simple program... [ 35.783427] cgroup: Unknown subsys name 'net' [ 35.816486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:53:06 Registers: info registers vcpu 0 RAX=000000000003de00 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806ce3de20 RBP=ffff88806ce3de20 RSP=ffff8880145575e0 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea0000343200 R14=ffff88800844f780 R15=0000000000000001 RIP=ffffffff812d8e64 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 00007f1cd822c900 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=00007f1cd76b8720 CR3=00000000099c6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=4440e5a1d71d14ab00000000000ae988 XMM05=2b008ec6d53723f800000000001339e0 XMM06=806171799158d9670000000000132710 XMM07=fb795ef6d657705600000000001219b8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863dde7e RDX=0000000000000008 RSI=ffff888019fbf9b8 RDI=ffff888019fbf3b8 RBP=ffff888019fbf410 RSP=ffff888019fbf340 R8 =ffffffff863dde82 R9 =ffff888019fbf3f8 R10=0000000000038001 R11=0000000000091ae9 R12=ffff888019fbf418 R13=ffff888019fbf400 R14=ffff888019fbf9c0 R15=ffff888019fbf3b8 RIP=ffffffff811303fa 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 00007f8e26c49900 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=00007f8e27200618 CR3=000000000e6f0000 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=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