[ 38.000536] BUG: Bad rss-counter state mm:00000000eec7ce5a type:MM_FILEPAGES val:33 [ 38.001732] BUG: Bad rss-counter state mm:00000000eec7ce5a type:MM_ANONPAGES val:22 [ 38.039427] ================================================================== [ 38.040474] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.041569] Read of size 8 at addr ffff88800e1a44e0 by task sshd/219 [ 38.042498] [ 38.042765] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.043794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.044872] Call Trace: [ 38.045226] [ 38.045579] dump_stack_lvl+0x91/0xf0 [ 38.046126] print_report+0xcc/0x620 [ 38.046670] ? __virt_addr_valid+0x102/0x340 [ 38.047290] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.047990] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.048745] kasan_report+0xbe/0xf0 [ 38.049332] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.050119] vma_interval_tree_remove+0xc75/0xec0 [ 38.050868] vma_prepare+0xc54/0x11a0 [ 38.051458] __split_vma+0x5af/0x950 [ 38.052044] ? __pfx___split_vma+0x10/0x10 [ 38.052692] ? find_held_lock+0x2c/0x110 [ 38.053357] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.054066] ? lock_is_held_type+0x9f/0x120 [ 38.054728] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.055479] ? mtree_range_walk+0x632/0x900 [ 38.056164] ? mas_walk+0x5c7/0x7c0 [ 38.056747] do_vmi_munmap+0x1f1/0x2b0 [ 38.057394] mmap_region+0x1f9/0x2660 [ 38.057990] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.058596] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.059458] ? __pfx_lock_acquire+0x10/0x10 [ 38.060091] ? __pfx_mmap_region+0x10/0x10 [ 38.060722] ? security_mmap_addr+0x7d/0xa0 [ 38.061375] ? get_unmapped_area+0x1f5/0x3f0 [ 38.062029] do_mmap+0x854/0xf00 [ 38.062548] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.063220] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.063893] ksys_mmap_pgoff+0x3af/0x500 [ 38.064491] do_syscall_64+0x3f/0x90 [ 38.065056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.065848] RIP: 0033:0x7fcf24662d82 [ 38.066391] 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 [ 38.068954] RSP: 002b:00007ffd995b9b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.070050] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf24662d82 [ 38.071061] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf23a9c000 [ 38.072073] RBP: 00007fcf23a9c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.073072] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577eac2cec0 [ 38.074092] R13: 00007ffd995b9b80 R14: 00007ffd995b9bb0 R15: 00007ffd995b9f10 [ 38.075110] [ 38.075459] [ 38.075715] Allocated by task 211: [ 38.076227] kasan_save_stack+0x22/0x50 [ 38.076824] kasan_set_track+0x25/0x30 [ 38.077421] __kasan_slab_alloc+0x59/0x70 [ 38.077999] kmem_cache_alloc+0x16b/0x370 [ 38.078598] vm_area_dup+0x20/0x160 [ 38.079129] __split_vma+0x170/0x950 [ 38.079669] split_vma+0xc6/0x110 [ 38.080165] mprotect_fixup+0x8d2/0xb30 [ 38.080726] do_mprotect_pkey+0x87e/0xd40 [ 38.081339] __x64_sys_mprotect+0x78/0xc0 [ 38.081946] do_syscall_64+0x3f/0x90 [ 38.082498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.083245] [ 38.083500] Freed by task 211: [ 38.083958] kasan_save_stack+0x22/0x50 [ 38.084534] kasan_set_track+0x25/0x30 [ 38.085133] kasan_save_free_info+0x2b/0x50 [ 38.085721] __kasan_slab_free+0x10a/0x190 [ 38.086387] kmem_cache_free+0x10d/0x4d0 [ 38.087042] rcu_core+0x8c8/0x2860 [ 38.087610] __do_softirq+0x1b7/0x7d4 [ 38.088220] [ 38.088490] Last potentially related work creation: [ 38.089242] kasan_save_stack+0x22/0x50 [ 38.089928] __kasan_record_aux_stack+0x8e/0xa0 [ 38.090713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.091589] remove_vma+0x139/0x170 [ 38.092203] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.092961] do_vmi_munmap+0x1f1/0x2b0 [ 38.093623] __vm_munmap+0x138/0x3a0 [ 38.094259] __x64_sys_munmap+0x59/0x80 [ 38.094935] do_syscall_64+0x3f/0x90 [ 38.095570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.096443] [ 38.096730] Second to last potentially related work creation: [ 38.097675] kasan_save_stack+0x22/0x50 [ 38.098331] __kasan_record_aux_stack+0x8e/0xa0 [ 38.099078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.099909] remove_vma+0x139/0x170 [ 38.100493] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.101221] do_vmi_munmap+0x1f1/0x2b0 [ 38.101875] move_vma.constprop.0+0x88a/0x1ba0 [ 38.102620] __do_sys_mremap+0xb78/0x1780 [ 38.103304] do_syscall_64+0x3f/0x90 [ 38.103910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.104743] [ 38.105013] The buggy address belongs to the object at ffff88800e1a4488 [ 38.105013] which belongs to the cache vm_area_struct of size 168 [ 38.106991] The buggy address is located 88 bytes inside of [ 38.106991] freed 168-byte region [ffff88800e1a4488, ffff88800e1a4530) [ 38.108908] [ 38.109191] The buggy address belongs to the physical page: [ 38.110092] page:000000002ffbae2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1a4 [ 38.111576] memcg:ffff88800e0e3001 [ 38.112164] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.113043] page_type: 0xffffffff() [ 38.113658] raw: 0100000000000200 ffff88800879fc80 ffffea0000379180 dead000000000004 [ 38.114923] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0e3001 [ 38.116164] page dumped because: kasan: bad access detected [ 38.117080] [ 38.117369] Memory state around the buggy address: [ 38.118158] ffff88800e1a4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.119281] ffff88800e1a4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.120188] >ffff88800e1a4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.121087] ^ [ 38.121901] ffff88800e1a4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 38.122810] ffff88800e1a4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.123710] ================================================================== [ 38.125302] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 40.076117] BUG: Bad rss-counter state mm:00000000611bf98e type:MM_FILEPAGES val:33 [ 40.077591] BUG: Bad rss-counter state mm:00000000611bf98e type:MM_ANONPAGES val:22 [ 40.607394] BUG: Bad rss-counter state mm:00000000649ae07a type:MM_FILEPAGES val:33 [ 40.608814] BUG: Bad rss-counter state mm:00000000649ae07a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56441' (ECDSA) to the list of known hosts. 2023/06/20 05:56:17 fuzzer started 2023/06/20 05:56:17 dialing manager at localhost:44161 2023/06/20 05:56:17 checking machine... 2023/06/20 05:56:17 checking revisions... [ 41.247859] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:56:17 testing simple program... [ 41.299730] cgroup: Unknown subsys name 'net' [ 41.368850] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:56:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=fffffffffffffdf8 RCX=00007f1039b35e83 RDX=000000000000006e RSI=00007f1039bf98a0 RDI=0000000000000003 RBP=0000000000000002 RSP=00007ffebd82cde0 R8 =000055d4b05122a0 R9 =0000000000000034 R10=000055d4b051c1e0 R11=0000000000000246 R12=676f6c2f7665642f R13=0000000000000000 R14=000000000000000a R15=000055d4b04f48b0 RIP=00007f1039b2ef23 RFL=00000207 [-----PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1039643900 00000000 00000000 GS =0000 0000000000000000 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=00007f1039bf8650 CR3=000000000e1e4000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ff369f42160 CR3=000000000d74e000 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=62cac74f787802b0554fd119f1249928 XMM02=000000000011e488ec2efd57dc4c00df XMM03=0000000000124a40f83c8404e429db18 XMM04=3955c070dfdeb62800000000000ae988 XMM05=70154da6851f25b30000000000135c20 XMM06=806171799158d96700000000001352a8 XMM07=e042d86d42eb936e0000000000124d18 XMM08=f83c8404e429db18000000000011e4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000