[ 24.520883] BUG: Bad rss-counter state mm:0000000049f2c29f type:MM_FILEPAGES val:33 [ 24.522221] BUG: Bad rss-counter state mm:0000000049f2c29f type:MM_ANONPAGES val:22 [ 24.558840] ================================================================== [ 24.559900] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.560842] Read of size 8 at addr ffff88800d5655c8 by task sshd/218 [ 24.561707] [ 24.561924] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.562789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.563764] Call Trace: [ 24.564089] [ 24.564378] dump_stack_lvl+0x91/0xf0 [ 24.564874] print_report+0xcc/0x620 [ 24.565357] ? __virt_addr_valid+0x102/0x340 [ 24.565920] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.566535] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.567168] kasan_report+0xbe/0xf0 [ 24.567641] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.568261] vma_interval_tree_remove+0xc75/0xec0 [ 24.568856] vma_prepare+0xc54/0x11a0 [ 24.569330] __split_vma+0x5af/0x950 [ 24.569809] ? __pfx___split_vma+0x10/0x10 [ 24.570337] ? find_held_lock+0x2c/0x110 [ 24.570855] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.571419] ? lock_is_held_type+0x9f/0x120 [ 24.571954] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.572552] ? mtree_range_walk+0x632/0x900 [ 24.573099] ? mas_walk+0x5c7/0x7c0 [ 24.573589] do_vmi_munmap+0x1f1/0x2b0 [ 24.574076] mmap_region+0x1f9/0x2660 [ 24.574550] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.575057] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.575765] ? __pfx_lock_acquire+0x10/0x10 [ 24.576304] ? __pfx_mmap_region+0x10/0x10 [ 24.576824] ? security_mmap_addr+0x7d/0xa0 [ 24.577351] ? get_unmapped_area+0x1f5/0x3f0 [ 24.577905] do_mmap+0x854/0xf00 [ 24.578340] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.578834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.579400] ksys_mmap_pgoff+0x3af/0x500 [ 24.579908] do_syscall_64+0x3f/0x90 [ 24.580387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.581029] RIP: 0033:0x7f287d1cbd82 [ 24.581505] 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 [ 24.583606] RSP: 002b:00007ffc4a9f2ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.584504] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f287d1cbd82 [ 24.585353] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f287c605000 [ 24.586195] RBP: 00007f287c605000 R08: 0000000000000009 R09: 0000000000001000 [ 24.587027] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575d5fd7f70 [ 24.587859] R13: 00007ffc4a9f2ae0 R14: 00007ffc4a9f2b10 R15: 00007ffc4a9f2e70 [ 24.588706] [ 24.588995] [ 24.589214] Allocated by task 209: [ 24.589661] kasan_save_stack+0x22/0x50 [ 24.590162] kasan_set_track+0x25/0x30 [ 24.590660] __kasan_slab_alloc+0x59/0x70 [ 24.591190] kmem_cache_alloc+0x16b/0x370 [ 24.591704] vm_area_dup+0x20/0x160 [ 24.592159] __split_vma+0x170/0x950 [ 24.592615] split_vma+0xc6/0x110 [ 24.593050] mprotect_fixup+0x8d2/0xb30 [ 24.593558] do_mprotect_pkey+0x87e/0xd40 [ 24.594080] __x64_sys_mprotect+0x78/0xc0 [ 24.594601] do_syscall_64+0x3f/0x90 [ 24.595080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.595722] [ 24.595932] Freed by task 209: [ 24.596319] kasan_save_stack+0x22/0x50 [ 24.596812] kasan_set_track+0x25/0x30 [ 24.597306] kasan_save_free_info+0x2b/0x50 [ 24.597841] __kasan_slab_free+0x10a/0x190 [ 24.598373] kmem_cache_free+0x10d/0x4d0 [ 24.598896] rcu_core+0x8c8/0x2860 [ 24.599342] __do_softirq+0x1b7/0x7d4 [ 24.599817] [ 24.600031] Last potentially related work creation: [ 24.600613] kasan_save_stack+0x22/0x50 [ 24.601108] __kasan_record_aux_stack+0x8e/0xa0 [ 24.601704] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.602366] remove_vma+0x139/0x170 [ 24.602822] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.603374] do_vmi_munmap+0x1f1/0x2b0 [ 24.603857] __vm_munmap+0x138/0x3a0 [ 24.604320] __x64_sys_munmap+0x59/0x80 [ 24.604811] do_syscall_64+0x3f/0x90 [ 24.605281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.605935] [ 24.606147] The buggy address belongs to the object at ffff88800d565570 [ 24.606147] which belongs to the cache vm_area_struct of size 168 [ 24.607588] The buggy address is located 88 bytes inside of [ 24.607588] freed 168-byte region [ffff88800d565570, ffff88800d565618) [ 24.608966] [ 24.609179] The buggy address belongs to the physical page: [ 24.609843] page:00000000fc31ecd3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd565 [ 24.610921] memcg:ffff88801447bf01 [ 24.611348] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.612033] page_type: 0xffffffff() [ 24.612484] raw: 0100000000000200 ffff8880087a0c80 ffffea000067d240 dead000000000003 [ 24.613389] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801447bf01 [ 24.614308] page dumped because: kasan: bad access detected [ 24.614967] [ 24.615182] Memory state around the buggy address: [ 24.615748] ffff88800d565480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.616586] ffff88800d565500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.617435] >ffff88800d565580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.618271] ^ [ 24.618926] ffff88800d565600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 24.619772] ffff88800d565680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.620603] ================================================================== [ 24.621648] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.664475] BUG: Bad rss-counter state mm:000000006754ac29 type:MM_FILEPAGES val:33 [ 26.665829] BUG: Bad rss-counter state mm:000000006754ac29 type:MM_ANONPAGES val:22 [ 27.133760] BUG: Bad rss-counter state mm:000000005649a334 type:MM_FILEPAGES val:33 [ 27.134980] BUG: Bad rss-counter state mm:000000005649a334 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2784' (ECDSA) to the list of known hosts. 2023/06/20 13:57:03 fuzzer started 2023/06/20 13:57:03 dialing manager at localhost:36067 2023/06/20 13:57:03 checking machine... 2023/06/20 13:57:03 checking revisions... [ 27.772288] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:57:03 testing simple program... [ 27.829056] cgroup: Unknown subsys name 'net' [ 27.888535] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:57:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f625d4320c0 CR3=0000000018b5c000 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=2033303a37353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a37353a3331203032 XMM08=7020303d64696720303d64697520612f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=1ffff11001e63ed3 RSI=ffffffff8180ca5a RDI=ffff88800f31f548 RBP=ffff88800f31f5e0 RSP=ffff88800f31f538 R8 =ffffffff86139748 R9 =ffff88800f31f588 R10=0000000000038001 R11=0000000000020f03 R12=ffff88800f31f610 R13=0000000000000000 R14=ffff8880102fd1c0 R15=00000000000000a4 RIP=ffffffff811305e0 RFL=00000202 [-------] 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 00007f31a94a6900 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=00007ffe3d135000 CR3=000000000daa2000 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