[ 23.839222] BUG: Bad rss-counter state mm:000000000dc32df8 type:MM_FILEPAGES val:33 [ 23.840282] BUG: Bad rss-counter state mm:000000000dc32df8 type:MM_ANONPAGES val:22 [ 23.880075] ================================================================== [ 23.881339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.882331] Read of size 8 at addr ffff88800e675798 by task sshd/219 [ 23.883191] [ 23.883420] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.884311] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.885518] Call Trace: [ 23.885948] [ 23.886300] dump_stack_lvl+0x91/0xf0 [ 23.886799] print_report+0xcc/0x620 [ 23.887291] ? __virt_addr_valid+0x102/0x340 [ 23.887851] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.888497] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.889125] kasan_report+0xbe/0xf0 [ 23.889599] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.890226] vma_interval_tree_remove+0xc75/0xec0 [ 23.890848] vma_prepare+0xc54/0x11a0 [ 23.891339] __split_vma+0x5af/0x950 [ 23.891827] ? __pfx___split_vma+0x10/0x10 [ 23.892383] ? find_held_lock+0x2c/0x110 [ 23.892924] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.893505] ? lock_is_held_type+0x9f/0x120 [ 23.894059] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.894681] ? mtree_range_walk+0x632/0x900 [ 23.895249] ? mas_walk+0x5c7/0x7c0 [ 23.895739] do_vmi_munmap+0x1f1/0x2b0 [ 23.896255] mmap_region+0x1f9/0x2660 [ 23.896753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.897279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.898020] ? __pfx_lock_acquire+0x10/0x10 [ 23.898576] ? __pfx_mmap_region+0x10/0x10 [ 23.899121] ? security_mmap_addr+0x7d/0xa0 [ 23.899672] ? get_unmapped_area+0x1f5/0x3f0 [ 23.900270] do_mmap+0x854/0xf00 [ 23.900725] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.901242] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.901832] ksys_mmap_pgoff+0x3af/0x500 [ 23.902355] do_syscall_64+0x3f/0x90 [ 23.902851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.903520] RIP: 0033:0x7fda424b6d82 [ 23.903993] 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 [ 23.906210] RSP: 002b:00007ffcdaabe338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.907147] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda424b6d82 [ 23.908020] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda418f0000 [ 23.908914] RBP: 00007fda418f0000 R08: 0000000000000009 R09: 0000000000001000 [ 23.909792] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559544cdeec0 [ 23.910669] R13: 00007ffcdaabe350 R14: 00007ffcdaabe380 R15: 00007ffcdaabe6e0 [ 23.911548] [ 23.911847] [ 23.912068] Allocated by task 212: [ 23.912546] kasan_save_stack+0x22/0x50 [ 23.913063] kasan_set_track+0x25/0x30 [ 23.913575] __kasan_slab_alloc+0x59/0x70 [ 23.914111] kmem_cache_alloc+0x16b/0x370 [ 23.914651] vm_area_dup+0x20/0x160 [ 23.915117] __split_vma+0x170/0x950 [ 23.915606] split_vma+0xc6/0x110 [ 23.916062] mprotect_fixup+0x8d2/0xb30 [ 23.916589] do_mprotect_pkey+0x87e/0xd40 [ 23.917126] __x64_sys_mprotect+0x78/0xc0 [ 23.917669] do_syscall_64+0x3f/0x90 [ 23.918161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.918832] [ 23.919054] Freed by task 212: [ 23.919465] kasan_save_stack+0x22/0x50 [ 23.919988] kasan_set_track+0x25/0x30 [ 23.920509] kasan_save_free_info+0x2b/0x50 [ 23.921124] __kasan_slab_free+0x10a/0x190 [ 23.921681] kmem_cache_free+0x10d/0x4d0 [ 23.922206] rcu_core+0x8c8/0x2860 [ 23.922663] __do_softirq+0x1b7/0x7d4 [ 23.923163] [ 23.923386] Last potentially related work creation: [ 23.923989] kasan_save_stack+0x22/0x50 [ 23.924526] __kasan_record_aux_stack+0x8e/0xa0 [ 23.925117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.925779] remove_vma+0x139/0x170 [ 23.926242] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.926817] do_vmi_munmap+0x1f1/0x2b0 [ 23.927317] __vm_munmap+0x138/0x3a0 [ 23.927799] __x64_sys_munmap+0x59/0x80 [ 23.928321] do_syscall_64+0x3f/0x90 [ 23.928811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.929478] [ 23.929698] The buggy address belongs to the object at ffff88800e675740 [ 23.929698] which belongs to the cache vm_area_struct of size 168 [ 23.931220] The buggy address is located 88 bytes inside of [ 23.931220] freed 168-byte region [ffff88800e675740, ffff88800e6757e8) [ 23.932700] [ 23.932921] The buggy address belongs to the physical page: [ 23.933605] page:000000002a991e71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe675 [ 23.934734] memcg:ffff88800dd94001 [ 23.935174] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.935893] page_type: 0xffffffff() [ 23.936369] raw: 0100000000000200 ffff8880087a0c80 ffffea0000354bc0 dead000000000007 [ 23.937317] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd94001 [ 23.938255] page dumped because: kasan: bad access detected [ 23.938944] [ 23.939165] Memory state around the buggy address: [ 23.939767] ffff88800e675680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.940678] ffff88800e675700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.941568] >ffff88800e675780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.942447] ^ [ 23.942958] ffff88800e675800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.943845] ffff88800e675880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.944736] ================================================================== Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.946533] Disabling lock debugging due to kernel taint [ 25.767505] BUG: Bad rss-counter state mm:00000000f7340084 type:MM_FILEPAGES val:33 [ 25.768263] BUG: Bad rss-counter state mm:00000000f7340084 type:MM_ANONPAGES val:22 [ 26.240159] BUG: Bad rss-counter state mm:000000006cb90f00 type:MM_FILEPAGES val:33 [ 26.241393] BUG: Bad rss-counter state mm:000000006cb90f00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1631' (ECDSA) to the list of known hosts. 2023/06/20 14:08:58 fuzzer started 2023/06/20 14:08:58 dialing manager at localhost:36067 2023/06/20 14:08:58 checking machine... 2023/06/20 14:08:58 checking revisions... [ 26.853531] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:08:59 testing simple program... [ 26.919706] cgroup: Unknown subsys name 'net' [ 27.007270] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:08:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fc74ffc1b80 CR3=000000000f72e000 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=2038353a38303a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a38303a3431203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff861436df RBX=0000000000000001 RCX=ffffffff861436da RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c286db RBP=ffff88800f3678c8 RSP=ffff88800f367800 R8 =ffffffff861436de R9 =ffff88800f3678b0 R10=0000000000038001 R11=00000000000229a3 R12=ffff88800f3678d0 R13=ffff88800f3678b8 R14=ffff88800f367e58 R15=ffff88800f367870 RIP=ffffffff81131127 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 00007f8939419900 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=00007f89399d0618 CR3=00000000159e2000 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=563412feff00545000000000000080fe 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