[ 24.547091] BUG: Bad rss-counter state mm:00000000e0948ae4 type:MM_FILEPAGES val:33 [ 24.548234] BUG: Bad rss-counter state mm:00000000e0948ae4 type:MM_ANONPAGES val:22 [ 24.698170] ================================================================== [ 24.699094] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.700035] Read of size 8 at addr ffff88800efe04e0 by task sshd/220 [ 24.700811] [ 24.701150] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.702021] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.703001] Call Trace: [ 24.703328] <TASK> [ 24.703614] dump_stack_lvl+0x91/0xf0 [ 24.704108] print_report+0xcc/0x620 [ 24.704595] ? __virt_addr_valid+0x102/0x340 [ 24.705163] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.705787] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.706410] kasan_report+0xbe/0xf0 [ 24.706889] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.707522] vma_interval_tree_remove+0xc75/0xec0 [ 24.708135] vma_prepare+0xc54/0x11a0 [ 24.708622] __split_vma+0x5af/0x950 [ 24.709125] ? __pfx___split_vma+0x10/0x10 [ 24.709665] ? find_held_lock+0x2c/0x110 [ 24.710203] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.710785] ? lock_is_held_type+0x9f/0x120 [ 24.711332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.711945] ? mtree_range_walk+0x632/0x900 [ 24.712519] ? mas_walk+0x5c7/0x7c0 [ 24.712996] do_vmi_munmap+0x1f1/0x2b0 [ 24.713513] mmap_region+0x1f9/0x2660 [ 24.714005] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.714523] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.715249] ? __pfx_lock_acquire+0x10/0x10 [ 24.715786] ? __pfx_mmap_region+0x10/0x10 [ 24.716327] ? security_mmap_addr+0x7d/0xa0 [ 24.716871] ? get_unmapped_area+0x1f5/0x3f0 [ 24.717465] do_mmap+0x854/0xf00 [ 24.717905] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.718407] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.718974] ksys_mmap_pgoff+0x3af/0x500 [ 24.719493] do_syscall_64+0x3f/0x90 [ 24.719969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.720627] RIP: 0033:0x7f3f9d48cd82 [ 24.721105] 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 [ 24.723315] RSP: 002b:00007ffdb1f27d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.724233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f9d48cd82 [ 24.725106] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f9c8c6000 [ 24.725968] RBP: 00007f3f9c8c6000 R08: 0000000000000009 R09: 0000000000001000 [ 24.726814] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e77ec3f70 [ 24.727662] R13: 00007ffdb1f27da0 R14: 00007ffdb1f27dd0 R15: 00007ffdb1f28130 [ 24.728526] </TASK> [ 24.728820] [ 24.729057] Allocated by task 213: [ 24.729502] kasan_save_stack+0x22/0x50 [ 24.730013] kasan_set_track+0x25/0x30 [ 24.730529] __kasan_slab_alloc+0x59/0x70 [ 24.731099] kmem_cache_alloc+0x16b/0x370 [ 24.731649] vm_area_dup+0x20/0x160 [ 24.732135] __split_vma+0x170/0x950 [ 24.732623] split_vma+0xc6/0x110 [ 24.733094] mprotect_fixup+0x8d2/0xb30 [ 24.733617] do_mprotect_pkey+0x87e/0xd40 [ 24.734172] __x64_sys_mprotect+0x78/0xc0 [ 24.734724] do_syscall_64+0x3f/0x90 [ 24.735229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.735910] [ 24.736135] Freed by task 204: [ 24.736566] kasan_save_stack+0x22/0x50 [ 24.737131] kasan_set_track+0x25/0x30 [ 24.737664] kasan_save_free_info+0x2b/0x50 [ 24.738241] __kasan_slab_free+0x10a/0x190 [ 24.738809] kmem_cache_free+0x10d/0x4d0 [ 24.739362] rcu_core+0x8c8/0x2860 [ 24.739848] __do_softirq+0x1b7/0x7d4 [ 24.740353] [ 24.740589] Last potentially related work creation: [ 24.741222] kasan_save_stack+0x22/0x50 [ 24.741756] __kasan_record_aux_stack+0x8e/0xa0 [ 24.742368] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.743046] remove_vma+0x139/0x170 [ 24.743527] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.744127] do_vmi_munmap+0x1f1/0x2b0 [ 24.744653] __vm_munmap+0x138/0x3a0 [ 24.745173] __x64_sys_munmap+0x59/0x80 [ 24.745699] do_syscall_64+0x3f/0x90 [ 24.746196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.746874] [ 24.747095] The buggy address belongs to the object at ffff88800efe0488 [ 24.747095] which belongs to the cache vm_area_struct of size 168 [ 24.748591] The buggy address is located 88 bytes inside of [ 24.748591] freed 168-byte region [ffff88800efe0488, ffff88800efe0530) [ 24.750043] [ 24.750265] The buggy address belongs to the physical page: [ 24.750937] page:00000000e2bceef8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefe0 [ 24.752038] memcg:ffff88800df56c01 [ 24.752469] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.753131] page_type: 0xffffffff() [ 24.753585] raw: 0100000000000200 ffff88800879fc80 ffffea000038ee80 dead000000000002 [ 24.754521] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df56c01 [ 24.755448] page dumped because: kasan: bad access detected [ 24.756120] [ 24.756342] Memory state around the buggy address: [ 24.756945] ffff88800efe0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.757837] ffff88800efe0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.758718] >ffff88800efe0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.759597] ^ [ 24.760355] ffff88800efe0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.761236] ffff88800efe0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.762119] ================================================================== [ 24.763190] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.023082] BUG: Bad rss-counter state mm:0000000025b28d82 type:MM_FILEPAGES val:33 [ 27.024813] BUG: Bad rss-counter state mm:0000000025b28d82 type:MM_ANONPAGES val:22 [ 27.550135] BUG: Bad rss-counter state mm:00000000912af7e8 type:MM_FILEPAGES val:33 [ 27.551144] BUG: Bad rss-counter state mm:00000000912af7e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5003' (ECDSA) to the list of known hosts. 2023/06/20 04:15:01 fuzzer started 2023/06/20 04:15:01 dialing manager at localhost:44161 2023/06/20 04:15:02 checking machine... 2023/06/20 04:15:02 checking revisions... [ 28.365912] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:15:02 testing simple program... [ 28.416989] cgroup: Unknown subsys name 'net' [ 28.486968] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:15:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86137dd2 RDX=1ffff1100d9c1360 RSI=1ffff1100d9c135e RDI=ffff88806ce09b00 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137dd6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e08 R15=ffff88806ce09a98 RIP=ffffffff811310f5 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=00007fb419460cc0 CR3=000000000e9a8000 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=2031303a35313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a35313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800da78bc8 RCX=ffffffff812bd93d RDX=1ffff110033ef5ef RSI=0000000000000008 RDI=ffff888019f7af78 RBP=ffff888019f7af70 RSP=ffff8880167a7c00 R8 =0000000000000001 R9 =ffffed10033ef5ef R10=ffff888019f7af7f R11=0000000000000000 R12=ffff88800fb44bc8 R13=0000000000000001 R14=0000000000000001 R15=00007f37f52bc000 RIP=ffffffff814c07e4 RFL=00000292 [--S-A--] 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 00007f37f52f6900 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=00007f37f52bb008 CR3=0000000015b88000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000