[ 26.233466] BUG: Bad rss-counter state mm:0000000023454f40 type:MM_FILEPAGES val:33 [ 26.234858] BUG: Bad rss-counter state mm:0000000023454f40 type:MM_ANONPAGES val:22 [ 26.380094] ================================================================== [ 26.381021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.382001] Read of size 8 at addr ffff88800ecd5880 by task sshd/219 [ 26.382788] [ 26.383075] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.384001] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.385006] Call Trace: [ 26.385326] [ 26.385612] dump_stack_lvl+0x91/0xf0 [ 26.386103] print_report+0xcc/0x620 [ 26.386588] ? __virt_addr_valid+0x102/0x340 [ 26.387143] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.387762] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.388381] kasan_report+0xbe/0xf0 [ 26.388879] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.389500] vma_interval_tree_remove+0xc75/0xec0 [ 26.390102] vma_prepare+0xc54/0x11a0 [ 26.390584] __split_vma+0x5af/0x950 [ 26.391057] ? __pfx___split_vma+0x10/0x10 [ 26.391587] ? find_held_lock+0x2c/0x110 [ 26.392111] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.392691] ? lock_is_held_type+0x9f/0x120 [ 26.393238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.393852] ? mtree_range_walk+0x632/0x900 [ 26.394407] ? mas_walk+0x5c7/0x7c0 [ 26.394884] do_vmi_munmap+0x1f1/0x2b0 [ 26.395379] mmap_region+0x1f9/0x2660 [ 26.395859] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.396372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.397098] ? __pfx_lock_acquire+0x10/0x10 [ 26.397634] ? __pfx_mmap_region+0x10/0x10 [ 26.398173] ? security_mmap_addr+0x7d/0xa0 [ 26.398702] ? get_unmapped_area+0x1f5/0x3f0 [ 26.399253] do_mmap+0x854/0xf00 [ 26.399692] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.400185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.400767] ksys_mmap_pgoff+0x3af/0x500 [ 26.401282] do_syscall_64+0x3f/0x90 [ 26.401754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.402402] RIP: 0033:0x7f8427f7bd82 [ 26.402860] 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 [ 26.404977] RSP: 002b:00007ffd3844d418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.405888] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8427f7bd82 [ 26.406740] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84273b5000 [ 26.407581] RBP: 00007f84273b5000 R08: 0000000000000009 R09: 0000000000001000 [ 26.408441] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642b920ff70 [ 26.409286] R13: 00007ffd3844d430 R14: 00007ffd3844d460 R15: 00007ffd3844d7c0 [ 26.410157] [ 26.410454] [ 26.410674] Allocated by task 212: [ 26.411105] kasan_save_stack+0x22/0x50 [ 26.411609] kasan_set_track+0x25/0x30 [ 26.412100] __kasan_slab_alloc+0x59/0x70 [ 26.412633] kmem_cache_alloc+0x16b/0x370 [ 26.413150] vm_area_dup+0x20/0x160 [ 26.413606] __split_vma+0x170/0x950 [ 26.414076] split_vma+0xc6/0x110 [ 26.414510] mprotect_fixup+0x8d2/0xb30 [ 26.415018] do_mprotect_pkey+0x87e/0xd40 [ 26.415544] __x64_sys_mprotect+0x78/0xc0 [ 26.416070] do_syscall_64+0x3f/0x90 [ 26.416560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.417196] [ 26.417412] Freed by task 212: [ 26.417806] kasan_save_stack+0x22/0x50 [ 26.418310] kasan_set_track+0x25/0x30 [ 26.418803] kasan_save_free_info+0x2b/0x50 [ 26.419339] __kasan_slab_free+0x10a/0x190 [ 26.419869] kmem_cache_free+0x10d/0x4d0 [ 26.420388] rcu_core+0x8c8/0x2860 [ 26.420850] __do_softirq+0x1b7/0x7d4 [ 26.421324] [ 26.421540] Last potentially related work creation: [ 26.422125] kasan_save_stack+0x22/0x50 [ 26.422636] __kasan_record_aux_stack+0x8e/0xa0 [ 26.423220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.423873] remove_vma+0x139/0x170 [ 26.424322] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.424969] do_vmi_munmap+0x1f1/0x2b0 [ 26.425454] __vm_munmap+0x138/0x3a0 [ 26.425926] __x64_sys_munmap+0x59/0x80 [ 26.426427] do_syscall_64+0x3f/0x90 [ 26.426903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.427555] [ 26.427776] Second to last potentially related work creation: [ 26.428480] kasan_save_stack+0x22/0x50 [ 26.428975] __kasan_record_aux_stack+0x8e/0xa0 [ 26.429549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.430181] remove_vma+0x139/0x170 [ 26.430631] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.431184] do_vmi_munmap+0x1f1/0x2b0 [ 26.431669] mmap_region+0x1f9/0x2660 [ 26.432139] do_mmap+0x854/0xf00 [ 26.432587] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.433077] ksys_mmap_pgoff+0x3af/0x500 [ 26.433583] do_syscall_64+0x3f/0x90 [ 26.434060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.434701] [ 26.434920] The buggy address belongs to the object at ffff88800ecd5828 [ 26.434920] which belongs to the cache vm_area_struct of size 168 [ 26.436411] The buggy address is located 88 bytes inside of [ 26.436411] freed 168-byte region [ffff88800ecd5828, ffff88800ecd58d0) [ 26.437838] [ 26.438084] The buggy address belongs to the physical page: [ 26.438753] page:00000000e19ea939 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecd5 [ 26.439864] memcg:ffff88800eb94201 [ 26.440291] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.440980] page_type: 0xffffffff() [ 26.441430] raw: 0100000000000200 ffff88800879fc80 ffffea00003b6780 dead000000000004 [ 26.442385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb94201 [ 26.443317] page dumped because: kasan: bad access detected [ 26.443983] [ 26.444206] Memory state around the buggy address: [ 26.444798] ffff88800ecd5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.445670] ffff88800ecd5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 26.446531] >ffff88800ecd5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 26.447390] ^ [ 26.447801] ffff88800ecd5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.448677] ffff88800ecd5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 26.449528] ================================================================== [ 26.450456] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.321133] BUG: Bad rss-counter state mm:000000002a0c6d69 type:MM_FILEPAGES val:33 [ 28.321931] BUG: Bad rss-counter state mm:000000002a0c6d69 type:MM_ANONPAGES val:22 [ 28.805592] BUG: Bad rss-counter state mm:0000000052bf2a15 type:MM_FILEPAGES val:33 [ 28.806604] BUG: Bad rss-counter state mm:0000000052bf2a15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28699' (ECDSA) to the list of known hosts. 2023/06/19 16:55:11 fuzzer started 2023/06/19 16:55:12 dialing manager at localhost:44161 2023/06/19 16:55:12 checking machine... 2023/06/19 16:55:12 checking revisions... [ 29.522089] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:55:12 testing simple program... [ 29.571147] cgroup: Unknown subsys name 'net' [ 29.615061] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:55:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180c522 RCX=ffffffff860d6801 RDX=1ffff1100d9c1355 RSI=0000000000000000 RDI=ffffffff8180c522 RBP=ffffffff8180c522 RSP=ffff88806ce099f8 R8 =ffffffff860d68fa R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09b18 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800db14300 RIP=ffffffff811fc6f7 RFL=00000282 [--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 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=00007f9be842cb50 CR3=0000000009516000 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=e40c00eddeb0229284437779540c7a5d XMM02=ec2efd57dc4c00df000000000011d030 XMM03=bf9cef42955287bd000000000011d100 XMM04=7e0e66f42fe2051200000000000ae988 XMM05=dfcdbad4f1609c370000000000134dc8 XMM06=f07644ae6361182f0000000000133838 XMM07=e042d86d42eb936e00000000001241c8 XMM08=bf9cef42955287bd000000000011d100 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86136d7c RBX=0000000000000001 RCX=ffffffff81807eba RDX=0000000000000000 RSI=ffffffff86136d7c RDI=ffffffff85dfc4f4 RBP=ffffffff85dfc4f8 RSP=ffff88801696f238 R8 =ffffffff86136d7c R9 =ffff88801696f318 R10=0000000000038001 R11=0000000000020c48 R12=ffffffff85dfc4f4 R13=ffffffff85dfc4f4 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 RFL=00000286 [--S--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 00007f2703143900 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=00007ffcab6e6000 CR3=000000000f0a2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000