[ 26.426186] BUG: Bad rss-counter state mm:00000000c1832127 type:MM_FILEPAGES val:33 [ 26.427167] BUG: Bad rss-counter state mm:00000000c1832127 type:MM_ANONPAGES val:22 [ 26.588530] ================================================================== [ 26.589604] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.590723] Read of size 8 at addr ffff8880096e3798 by task sshd/219 [ 26.591819] [ 26.592080] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.592979] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.593983] Call Trace: [ 26.594306] [ 26.594590] dump_stack_lvl+0x91/0xf0 [ 26.595082] print_report+0xcc/0x620 [ 26.595580] ? __virt_addr_valid+0x102/0x340 [ 26.596141] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.596763] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.597380] kasan_report+0xbe/0xf0 [ 26.597858] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.598480] vma_interval_tree_remove+0xc75/0xec0 [ 26.599084] vma_prepare+0xc54/0x11a0 [ 26.599575] __split_vma+0x5af/0x950 [ 26.600044] ? __pfx___split_vma+0x10/0x10 [ 26.600580] ? find_held_lock+0x2c/0x110 [ 26.601105] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.601679] ? lock_is_held_type+0x9f/0x120 [ 26.602216] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.602822] ? mtree_range_walk+0x632/0x900 [ 26.603397] ? mas_walk+0x5c7/0x7c0 [ 26.603868] do_vmi_munmap+0x1f1/0x2b0 [ 26.604366] mmap_region+0x1f9/0x2660 [ 26.604851] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.605364] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.606092] ? __pfx_lock_acquire+0x10/0x10 [ 26.606642] ? __pfx_mmap_region+0x10/0x10 [ 26.607186] ? security_mmap_addr+0x7d/0xa0 [ 26.607747] ? get_unmapped_area+0x1f5/0x3f0 [ 26.608315] do_mmap+0x854/0xf00 [ 26.608770] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.609283] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.609864] ksys_mmap_pgoff+0x3af/0x500 [ 26.610384] do_syscall_64+0x3f/0x90 [ 26.610882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.611557] RIP: 0033:0x7f5d7a51ed82 [ 26.612033] 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 [ 26.614238] RSP: 002b:00007fff06bd6de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.615168] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d7a51ed82 [ 26.616068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d79958000 [ 26.616934] RBP: 00007f5d79958000 R08: 0000000000000009 R09: 0000000000001000 [ 26.617815] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ea566bec0 [ 26.618708] R13: 00007fff06bd6e00 R14: 00007fff06bd6e30 R15: 00007fff06bd7190 [ 26.619607] [ 26.619906] [ 26.620128] Allocated by task 212: [ 26.620571] kasan_save_stack+0x22/0x50 [ 26.621097] kasan_set_track+0x25/0x30 [ 26.621604] __kasan_slab_alloc+0x59/0x70 [ 26.622138] kmem_cache_alloc+0x16b/0x370 [ 26.622668] vm_area_dup+0x20/0x160 [ 26.623135] __split_vma+0x170/0x950 [ 26.623628] split_vma+0xc6/0x110 [ 26.624072] mprotect_fixup+0x8d2/0xb30 [ 26.624579] do_mprotect_pkey+0x87e/0xd40 [ 26.625102] __x64_sys_mprotect+0x78/0xc0 [ 26.625636] do_syscall_64+0x3f/0x90 [ 26.626101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.626744] [ 26.626958] Freed by task 212: [ 26.627353] kasan_save_stack+0x22/0x50 [ 26.627854] kasan_set_track+0x25/0x30 [ 26.628348] kasan_save_free_info+0x2b/0x50 [ 26.628883] __kasan_slab_free+0x10a/0x190 [ 26.629425] kmem_cache_free+0x10d/0x4d0 [ 26.629940] rcu_core+0x8c8/0x2860 [ 26.630380] __do_softirq+0x1b7/0x7d4 [ 26.630852] [ 26.631068] Last potentially related work creation: [ 26.631672] kasan_save_stack+0x22/0x50 [ 26.632260] __kasan_record_aux_stack+0x8e/0xa0 [ 26.632835] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.633481] remove_vma+0x139/0x170 [ 26.633936] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.634492] do_vmi_munmap+0x1f1/0x2b0 [ 26.634978] __vm_munmap+0x138/0x3a0 [ 26.635459] __x64_sys_munmap+0x59/0x80 [ 26.635964] do_syscall_64+0x3f/0x90 [ 26.636433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.637078] [ 26.637292] The buggy address belongs to the object at ffff8880096e3740 [ 26.637292] which belongs to the cache vm_area_struct of size 168 [ 26.638755] The buggy address is located 88 bytes inside of [ 26.638755] freed 168-byte region [ffff8880096e3740, ffff8880096e37e8) [ 26.640153] [ 26.640374] The buggy address belongs to the physical page: [ 26.641031] page:0000000037568bb5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96e3 [ 26.642113] memcg:ffff88800ed4b201 [ 26.642542] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.643240] page_type: 0xffffffff() [ 26.643710] raw: 0100000000000200 ffff88800879fc80 ffffea0000378900 dead000000000007 [ 26.644628] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed4b201 [ 26.645534] page dumped because: kasan: bad access detected [ 26.646195] [ 26.646414] Memory state around the buggy address: [ 26.646992] ffff8880096e3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.647863] ffff8880096e3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 26.648715] >ffff8880096e3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.649574] ^ [ 26.650066] ffff8880096e3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 26.650926] ffff8880096e3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 26.651781] ================================================================== [ 26.652714] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.514870] BUG: Bad rss-counter state mm:000000003bb3ece7 type:MM_FILEPAGES val:33 [ 29.515913] BUG: Bad rss-counter state mm:000000003bb3ece7 type:MM_ANONPAGES val:22 [ 30.010677] BUG: Bad rss-counter state mm:00000000d070d368 type:MM_FILEPAGES val:33 [ 30.011922] BUG: Bad rss-counter state mm:00000000d070d368 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10147' (ECDSA) to the list of known hosts. 2023/06/20 03:22:11 fuzzer started 2023/06/20 03:22:12 dialing manager at localhost:44161 2023/06/20 03:22:12 checking machine... 2023/06/20 03:22:12 checking revisions... [ 30.761408] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:22:12 testing simple program... [ 30.823624] cgroup: Unknown subsys name 'net' [ 30.883597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:22:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=000055f2b81b9218 CR3=000000000d1ea000 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=2031313a32323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a32323a3330203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007f15101329c0 CR3=000000000f178000 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=1dc6dd8fe66f5f9fe041f25f724ce7ab XMM02=000000000011f960ec2efd57dc4c00df XMM03=00000000001235a09ead655609bd227d XMM04=3c71ec4380858c7300000000000ae988 XMM05=dfcdbad4f1609c370000000000133100 XMM06=2f76df628ea577f900000000001322d8 XMM07=e042d86d42eb936e0000000000123820 XMM08=9ead655609bd227d000000000011f9c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000