[ 47.587583] BUG: Bad rss-counter state mm:000000006a6489e2 type:MM_FILEPAGES val:33 [ 47.588972] BUG: Bad rss-counter state mm:000000006a6489e2 type:MM_ANONPAGES val:22 [ 47.735362] ================================================================== [ 47.736286] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.737212] Read of size 8 at addr ffff888016f056b0 by task sshd/226 [ 47.738091] [ 47.738330] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.739174] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.740144] Call Trace: [ 47.740474] [ 47.740755] dump_stack_lvl+0x91/0xf0 [ 47.741239] print_report+0xcc/0x620 [ 47.741723] ? __virt_addr_valid+0x102/0x340 [ 47.742268] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.742881] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.743519] kasan_report+0xbe/0xf0 [ 47.743997] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.744606] vma_interval_tree_remove+0xc75/0xec0 [ 47.745202] vma_prepare+0xc54/0x11a0 [ 47.745677] __split_vma+0x5af/0x950 [ 47.746142] ? __pfx___split_vma+0x10/0x10 [ 47.746677] ? find_held_lock+0x2c/0x110 [ 47.747187] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.747775] ? lock_is_held_type+0x9f/0x120 [ 47.748317] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.748921] ? mtree_range_walk+0x632/0x900 [ 47.749473] ? mas_walk+0x5c7/0x7c0 [ 47.749944] do_vmi_munmap+0x1f1/0x2b0 [ 47.750438] mmap_region+0x1f9/0x2660 [ 47.750916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.751425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.752127] ? __pfx_lock_acquire+0x10/0x10 [ 47.752665] ? __pfx_mmap_region+0x10/0x10 [ 47.753201] ? security_mmap_addr+0x7d/0xa0 [ 47.753740] ? get_unmapped_area+0x1f5/0x3f0 [ 47.754290] do_mmap+0x854/0xf00 [ 47.754744] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.755243] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.755813] ksys_mmap_pgoff+0x3af/0x500 [ 47.756316] do_syscall_64+0x3f/0x90 [ 47.756801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.757449] RIP: 0033:0x7f9c3e3ead82 [ 47.757906] 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 [ 47.760047] RSP: 002b:00007fffb1f61158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.760948] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c3e3ead82 [ 47.761809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c3d824000 [ 47.762663] RBP: 00007f9c3d824000 R08: 0000000000000009 R09: 0000000000001000 [ 47.763513] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3c1975ec0 [ 47.764357] R13: 00007fffb1f61170 R14: 00007fffb1f611a0 R15: 00007fffb1f61500 [ 47.765218] [ 47.765514] [ 47.765737] Allocated by task 211: [ 47.766163] kasan_save_stack+0x22/0x50 [ 47.766669] kasan_set_track+0x25/0x30 [ 47.767172] __kasan_slab_alloc+0x59/0x70 [ 47.767718] kmem_cache_alloc+0x16b/0x370 [ 47.768239] vm_area_dup+0x20/0x160 [ 47.768697] __split_vma+0x170/0x950 [ 47.769163] split_vma+0xc6/0x110 [ 47.769604] mprotect_fixup+0x8d2/0xb30 [ 47.770103] do_mprotect_pkey+0x87e/0xd40 [ 47.770622] __x64_sys_mprotect+0x78/0xc0 [ 47.771146] do_syscall_64+0x3f/0x90 [ 47.771641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.772285] [ 47.772499] Freed by task 211: [ 47.772904] kasan_save_stack+0x22/0x50 [ 47.773405] kasan_set_track+0x25/0x30 [ 47.773899] kasan_save_free_info+0x2b/0x50 [ 47.774425] __kasan_slab_free+0x10a/0x190 [ 47.774973] kmem_cache_free+0x10d/0x4d0 [ 47.775488] rcu_core+0x8c8/0x2860 [ 47.775943] __do_softirq+0x1b7/0x7d4 [ 47.776417] [ 47.776633] Last potentially related work creation: [ 47.777214] kasan_save_stack+0x22/0x50 [ 47.777716] __kasan_record_aux_stack+0x8e/0xa0 [ 47.778293] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.779000] remove_vma+0x139/0x170 [ 47.779473] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.780024] do_vmi_munmap+0x1f1/0x2b0 [ 47.780506] __vm_munmap+0x138/0x3a0 [ 47.780983] __x64_sys_munmap+0x59/0x80 [ 47.781479] do_syscall_64+0x3f/0x90 [ 47.781950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.782588] [ 47.782805] The buggy address belongs to the object at ffff888016f05658 [ 47.782805] which belongs to the cache vm_area_struct of size 168 [ 47.784279] The buggy address is located 88 bytes inside of [ 47.784279] freed 168-byte region [ffff888016f05658, ffff888016f05700) [ 47.785683] [ 47.785899] The buggy address belongs to the physical page: [ 47.786559] page:0000000063baba94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f05 [ 47.787668] memcg:ffff888016f01201 [ 47.788094] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.788734] page_type: 0xffffffff() [ 47.789189] raw: 0100000000000200 ffff88800879fc80 ffffea00006067c0 dead000000000008 [ 47.790108] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f01201 [ 47.791010] page dumped because: kasan: bad access detected [ 47.791680] [ 47.791906] Memory state around the buggy address: [ 47.792492] ffff888016f05580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.793345] ffff888016f05600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 47.794203] >ffff888016f05680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.795047] ^ [ 47.795658] ffff888016f05700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 47.796503] ffff888016f05780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 47.797360] ================================================================== [ 47.798278] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 50.650725] BUG: Bad rss-counter state mm:00000000c0916243 type:MM_FILEPAGES val:33 [ 50.651834] BUG: Bad rss-counter state mm:00000000c0916243 type:MM_ANONPAGES val:22 [ 51.138873] BUG: Bad rss-counter state mm:00000000affffb2b type:MM_FILEPAGES val:33 [ 51.139829] BUG: Bad rss-counter state mm:00000000affffb2b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4159' (ECDSA) to the list of known hosts. 2023/06/19 17:20:47 fuzzer started 2023/06/19 17:20:48 dialing manager at localhost:44161 2023/06/19 17:20:48 checking machine... 2023/06/19 17:20:48 checking revisions... [ 51.783787] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:20:48 testing simple program... [ 51.823343] cgroup: Unknown subsys name 'net' [ 51.857093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:20:31 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888009a6c3c8 RCX=0000000080000000 RDX=ffff88800c4fb680 RSI=ffffffff83ab4021 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801835f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000011bd000011bd R12=0000000000000000 R13=0000000000000079 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 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 00007f20cad27900 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=00007f20cb2de618 CR3=000000000e9ce000 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=0000000000000035 RBX=0000000000000035 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800b9c0000 RSP=ffff88800afef7d0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffff88800b9c01a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff821927de RFL=00000093 [--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 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=00007f92d9866d20 CR3=000000000c614000 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=42a9165f0861fc878847411520c238ca XMM02=000000000011d3d0eff9b2d0a8fce9cb XMM03=000000000011d4a02c67c8bc2e329bc3 XMM04=115df2e99bfe69c800000000000ae988 XMM05=dbcc7a3a2a6165b70000000000134888 XMM06=13e856d8d71426c800000000001335b8 XMM07=fb795ef6d65770560000000000123e00 XMM08=2c67c8bc2e329bc3000000000011d440 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000