[ 29.480213] BUG: Bad rss-counter state mm:000000003f34d685 type:MM_FILEPAGES val:33 [ 29.480913] BUG: Bad rss-counter state mm:000000003f34d685 type:MM_ANONPAGES val:22 [ 29.621673] ================================================================== [ 29.622362] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.623056] Read of size 8 at addr ffff8880168c2b38 by task sshd/220 [ 29.623622] [ 29.623794] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.624413] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.626085] Call Trace: [ 29.626327] [ 29.626569] dump_stack_lvl+0x91/0xf0 [ 29.626961] print_report+0xcc/0x620 [ 29.627316] ? __virt_addr_valid+0x102/0x340 [ 29.627719] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.628171] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.628681] kasan_report+0xbe/0xf0 [ 29.629024] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.629478] vma_interval_tree_remove+0xc75/0xec0 [ 29.629919] vma_prepare+0xc54/0x11a0 [ 29.630268] __split_vma+0x5af/0x950 [ 29.630617] ? __pfx___split_vma+0x10/0x10 [ 29.631023] ? find_held_lock+0x2c/0x110 [ 29.631415] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.631842] ? lock_is_held_type+0x9f/0x120 [ 29.632259] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.632752] ? mtree_range_walk+0x632/0x900 [ 29.633216] ? mas_walk+0x5c7/0x7c0 [ 29.633612] do_vmi_munmap+0x1f1/0x2b0 [ 29.634001] mmap_region+0x1f9/0x2660 [ 29.634357] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.634730] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.635265] ? __pfx_lock_acquire+0x10/0x10 [ 29.635657] ? __pfx_mmap_region+0x10/0x10 [ 29.636049] ? security_mmap_addr+0x7d/0xa0 [ 29.636429] ? get_unmapped_area+0x1f5/0x3f0 [ 29.636826] do_mmap+0x854/0xf00 [ 29.637149] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.637554] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.637954] ksys_mmap_pgoff+0x3af/0x500 [ 29.638337] do_syscall_64+0x3f/0x90 [ 29.638682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.639173] RIP: 0033:0x7f22bd813d82 [ 29.639506] 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 [ 29.641052] RSP: 002b:00007fff16598de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.641733] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22bd813d82 [ 29.642355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22bcc4d000 [ 29.642960] RBP: 00007f22bcc4d000 R08: 0000000000000009 R09: 0000000000001000 [ 29.643595] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a596b0eb20 [ 29.644226] R13: 00007fff16598e00 R14: 00007fff16598e30 R15: 00007fff16599190 [ 29.644852] [ 29.645063] [ 29.645230] Allocated by task 213: [ 29.645563] kasan_save_stack+0x22/0x50 [ 29.645934] kasan_set_track+0x25/0x30 [ 29.646293] __kasan_slab_alloc+0x59/0x70 [ 29.646677] kmem_cache_alloc+0x16b/0x370 [ 29.647048] vm_area_dup+0x20/0x160 [ 29.647390] __split_vma+0x170/0x950 [ 29.647732] split_vma+0xc6/0x110 [ 29.648059] mprotect_fixup+0x8d2/0xb30 [ 29.648414] do_mprotect_pkey+0x87e/0xd40 [ 29.648798] __x64_sys_mprotect+0x78/0xc0 [ 29.649173] do_syscall_64+0x3f/0x90 [ 29.649543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.650000] [ 29.650160] Freed by task 213: [ 29.650436] kasan_save_stack+0x22/0x50 [ 29.650800] kasan_set_track+0x25/0x30 [ 29.651159] kasan_save_free_info+0x2b/0x50 [ 29.651531] __kasan_slab_free+0x10a/0x190 [ 29.651908] kmem_cache_free+0x10d/0x4d0 [ 29.652290] rcu_core+0x8c8/0x2860 [ 29.652610] __do_softirq+0x1b7/0x7d4 [ 29.652945] [ 29.653104] Last potentially related work creation: [ 29.653538] kasan_save_stack+0x22/0x50 [ 29.653937] __kasan_record_aux_stack+0x8e/0xa0 [ 29.654339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.654799] remove_vma+0x139/0x170 [ 29.655128] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.655539] do_vmi_munmap+0x1f1/0x2b0 [ 29.655905] __vm_munmap+0x138/0x3a0 [ 29.656239] __x64_sys_munmap+0x59/0x80 [ 29.656591] do_syscall_64+0x3f/0x90 [ 29.656945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.657448] [ 29.657609] The buggy address belongs to the object at ffff8880168c2ae0 [ 29.657609] which belongs to the cache vm_area_struct of size 168 [ 29.658726] The buggy address is located 88 bytes inside of [ 29.658726] freed 168-byte region [ffff8880168c2ae0, ffff8880168c2b88) [ 29.659759] [ 29.659911] The buggy address belongs to the physical page: [ 29.660399] page:000000008df0679f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168c2 [ 29.661208] memcg:ffff88800cae3701 [ 29.661588] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.662065] page_type: 0xffffffff() [ 29.662405] raw: 0100000000000200 ffff8880087a0c80 ffffea0000381c00 dead000000000004 [ 29.663084] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cae3701 [ 29.663743] page dumped because: kasan: bad access detected [ 29.664244] [ 29.664402] Memory state around the buggy address: [ 29.664826] ffff8880168c2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.665503] ffff8880168c2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.666092] >ffff8880168c2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.666674] ^ [ 29.667099] ffff8880168c2b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 29.667709] ffff8880168c2c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.668320] ================================================================== [ 29.669359] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.812772] BUG: Bad rss-counter state mm:00000000a2ec7728 type:MM_FILEPAGES val:33 [ 31.813410] BUG: Bad rss-counter state mm:00000000a2ec7728 type:MM_ANONPAGES val:22 [ 32.348867] BUG: Bad rss-counter state mm:0000000065dc1426 type:MM_FILEPAGES val:33 [ 32.349574] BUG: Bad rss-counter state mm:0000000065dc1426 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52054' (ECDSA) to the list of known hosts. 2023/06/21 10:10:22 fuzzer started 2023/06/21 10:10:22 dialing manager at localhost:36067 2023/06/21 10:10:22 checking machine... 2023/06/21 10:10:22 checking revisions... [ 33.279907] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:10:22 testing simple program... [ 33.328668] cgroup: Unknown subsys name 'net' [ 33.397926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:10:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=1ffff11001edfe9f RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800f6ff550 RSP=ffff88800f6ff488 R8 =ffffffff860d825a R9 =ffff88800f6ff538 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800f6ff558 R13=ffff88800f6ff540 R14=ffff88800f6ff630 R15=ffff88800f6ff4f8 RIP=ffffffff81131280 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 00007f280cceb900 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=00007ffc788a6ff8 CR3=000000000c920000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88806cf09c70 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff1100d9e138f RIP=ffffffff845368c8 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 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=00007f48addb0328 CR3=0000000017fd0000 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