[ 28.740585] BUG: Bad rss-counter state mm:000000004b8faae1 type:MM_FILEPAGES val:33 [ 28.742026] BUG: Bad rss-counter state mm:000000004b8faae1 type:MM_ANONPAGES val:22 [ 28.912298] ================================================================== [ 28.913265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.914228] Read of size 8 at addr ffff88800c99b310 by task sshd/219 [ 28.915119] [ 28.915341] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.916226] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.917217] Call Trace: [ 28.917568] [ 28.917859] dump_stack_lvl+0x91/0xf0 [ 28.918357] print_report+0xcc/0x620 [ 28.918843] ? __virt_addr_valid+0x102/0x340 [ 28.919414] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.920055] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.920671] kasan_report+0xbe/0xf0 [ 28.921172] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.921809] vma_interval_tree_remove+0xc75/0xec0 [ 28.922427] vma_prepare+0xc54/0x11a0 [ 28.922913] __split_vma+0x5af/0x950 [ 28.923397] ? __pfx___split_vma+0x10/0x10 [ 28.923934] ? find_held_lock+0x2c/0x110 [ 28.924471] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.925078] ? lock_is_held_type+0x9f/0x120 [ 28.925653] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.926277] ? mtree_range_walk+0x632/0x900 [ 28.926832] ? mas_walk+0x5c7/0x7c0 [ 28.927316] do_vmi_munmap+0x1f1/0x2b0 [ 28.927810] mmap_region+0x1f9/0x2660 [ 28.928302] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.928823] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.929653] ? __pfx_lock_acquire+0x10/0x10 [ 28.930216] ? __pfx_mmap_region+0x10/0x10 [ 28.930749] ? security_mmap_addr+0x7d/0xa0 [ 28.931291] ? get_unmapped_area+0x1f5/0x3f0 [ 28.931845] do_mmap+0x854/0xf00 [ 28.932302] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.932806] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.933385] ksys_mmap_pgoff+0x3af/0x500 [ 28.933894] do_syscall_64+0x3f/0x90 [ 28.934396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.935074] RIP: 0033:0x7f5cb6e1cd82 [ 28.935542] 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 [ 28.937711] RSP: 002b:00007ffdea9e1dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.938639] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5cb6e1cd82 [ 28.939500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5cb6256000 [ 28.940386] RBP: 00007f5cb6256000 R08: 0000000000000009 R09: 0000000000001000 [ 28.941248] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d13ceffec0 [ 28.942177] R13: 00007ffdea9e1de0 R14: 00007ffdea9e1e10 R15: 00007ffdea9e2170 [ 28.943114] [ 28.943423] [ 28.943639] Allocated by task 212: [ 28.944105] kasan_save_stack+0x22/0x50 [ 28.944618] kasan_set_track+0x25/0x30 [ 28.945132] __kasan_slab_alloc+0x59/0x70 [ 28.945692] kmem_cache_alloc+0x16b/0x370 [ 28.946223] vm_area_dup+0x20/0x160 [ 28.946680] __split_vma+0x170/0x950 [ 28.947175] split_vma+0xc6/0x110 [ 28.947630] mprotect_fixup+0x8d2/0xb30 [ 28.948151] do_mprotect_pkey+0x87e/0xd40 [ 28.948673] __x64_sys_mprotect+0x78/0xc0 [ 28.949218] do_syscall_64+0x3f/0x90 [ 28.949724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.950386] [ 28.950598] Freed by task 212: [ 28.951006] kasan_save_stack+0x22/0x50 [ 28.951518] kasan_set_track+0x25/0x30 [ 28.952028] kasan_save_free_info+0x2b/0x50 [ 28.952570] __kasan_slab_free+0x10a/0x190 [ 28.953136] kmem_cache_free+0x10d/0x4d0 [ 28.953656] rcu_core+0x8c8/0x2860 [ 28.954117] __do_softirq+0x1b7/0x7d4 [ 28.954605] [ 28.954828] Last potentially related work creation: [ 28.955435] kasan_save_stack+0x22/0x50 [ 28.955950] __kasan_record_aux_stack+0x8e/0xa0 [ 28.956587] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.957282] remove_vma+0x139/0x170 [ 28.957774] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.958360] do_vmi_munmap+0x1f1/0x2b0 [ 28.958853] __vm_munmap+0x138/0x3a0 [ 28.959337] __x64_sys_munmap+0x59/0x80 [ 28.959841] do_syscall_64+0x3f/0x90 [ 28.960339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.961006] [ 28.961222] The buggy address belongs to the object at ffff88800c99b2b8 [ 28.961222] which belongs to the cache vm_area_struct of size 168 [ 28.962732] The buggy address is located 88 bytes inside of [ 28.962732] freed 168-byte region [ffff88800c99b2b8, ffff88800c99b360) [ 28.964185] [ 28.964405] The buggy address belongs to the physical page: [ 28.965079] page:000000006596165c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc99b [ 28.966204] memcg:ffff88800ee2fb01 [ 28.966641] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.967305] page_type: 0xffffffff() [ 28.967769] raw: 0100000000000200 ffff88800879fc80 ffffea0000251c00 0000000000000008 [ 28.968713] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee2fb01 [ 28.969662] page dumped because: kasan: bad access detected [ 28.970346] [ 28.970564] Memory state around the buggy address: [ 28.971159] ffff88800c99b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.972049] ffff88800c99b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.972926] >ffff88800c99b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.973820] ^ [ 28.974307] ffff88800c99b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.975191] ffff88800c99b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.976061] ================================================================== [ 28.977065] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.966628] BUG: Bad rss-counter state mm:00000000e2ec96f4 type:MM_FILEPAGES val:33 [ 30.968000] BUG: Bad rss-counter state mm:00000000e2ec96f4 type:MM_ANONPAGES val:22 [ 31.382289] BUG: Bad rss-counter state mm:00000000eb0cdb81 type:MM_FILEPAGES val:33 [ 31.382948] BUG: Bad rss-counter state mm:00000000eb0cdb81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51542' (ECDSA) to the list of known hosts. 2023/06/20 09:22:34 fuzzer started 2023/06/20 09:22:34 dialing manager at localhost:44161 2023/06/20 09:22:34 checking machine... 2023/06/20 09:22:34 checking revisions... [ 32.055232] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:22:34 testing simple program... [ 32.105254] cgroup: Unknown subsys name 'net' [ 32.140524] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:22:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7f958 RCX=0000000000000001 RDX=1ffff110011aff2c RSI=ffff888008d7fe30 RDI=ffff888008d7f960 RBP=ffff888008d7fe30 RSP=ffff888008d7f8b0 R8 =0000000000000001 R9 =ffff888008d7f998 R10=0000000000038001 R11=000000000000fdc6 R12=0000000000000008 R13=ffff888008d7f9a0 R14=ffff888008d7fe30 R15=ffff888008d7f958 RIP=ffffffff81130445 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 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=00007fd25abf7000 CR3=000000000c6e4000 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=2d73391c38d7cfa5f54f4ea21f0009d9 XMM02=eff9b2d0a8fce9cb000000000011cd90 XMM03=2c67c8bc2e329bc3000000000011ceb8 XMM04=11f9e432c160f58e00000000000ae988 XMM05=4332928ebaf22e070000000000134d08 XMM06=dfcdbad4f1609c370000000000133560 XMM07=fb795ef6d65770560000000000123d40 XMM08=2c67c8bc2e329bc3000000000011ceb8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000011 RBX=0000000000000001 RCX=ffffffff8180c521 RDX=0000000000000011 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffff8880165d79b0 RSP=ffff8880165d78b8 R8 =ffffffff86137508 R9 =ffff8880165d7998 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffff8880165d79a0 R14=ffff8880165d7999 R15=ffff8880165d7958 RIP=ffffffff8112fc20 RFL=00000206 [-----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 00007f84944fe900 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=00007ffdfad94000 CR3=0000000016cd2000 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=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