[ 64.419709] BUG: Bad rss-counter state mm:00000000d01aaba8 type:MM_FILEPAGES val:33 [ 64.420968] BUG: Bad rss-counter state mm:00000000d01aaba8 type:MM_ANONPAGES val:22 [ 64.457097] ================================================================== [ 64.457998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.459234] Read of size 8 at addr ffff88800ee443f8 by task sshd/221 [ 64.460175] [ 64.460450] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 64.461749] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.462973] Call Trace: [ 64.463362] [ 64.463706] dump_stack_lvl+0x91/0xf0 [ 64.464318] print_report+0xcc/0x620 [ 64.464944] ? __virt_addr_valid+0x102/0x340 [ 64.465650] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.466441] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.467233] kasan_report+0xbe/0xf0 [ 64.467836] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.468680] vma_interval_tree_remove+0xc75/0xec0 [ 64.469428] vma_prepare+0xc54/0x11a0 [ 64.470041] __split_vma+0x5af/0x950 [ 64.470760] ? __pfx___split_vma+0x10/0x10 [ 64.471633] ? find_held_lock+0x2c/0x110 [ 64.472467] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.473308] ? lock_is_held_type+0x9f/0x120 [ 64.474025] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.474768] ? mtree_range_walk+0x632/0x900 [ 64.475443] ? mas_walk+0x5c7/0x7c0 [ 64.476044] do_vmi_munmap+0x1f1/0x2b0 [ 64.476673] mmap_region+0x1f9/0x2660 [ 64.477218] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.477727] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.478450] ? __pfx_lock_acquire+0x10/0x10 [ 64.478999] ? __pfx_mmap_region+0x10/0x10 [ 64.479534] ? security_mmap_addr+0x7d/0xa0 [ 64.480089] ? get_unmapped_area+0x1f5/0x3f0 [ 64.480651] do_mmap+0x854/0xf00 [ 64.481139] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.481639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.482214] ksys_mmap_pgoff+0x3af/0x500 [ 64.482734] do_syscall_64+0x3f/0x90 [ 64.483228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.483882] RIP: 0033:0x7fbae6f52d82 [ 64.484363] 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 [ 64.486668] RSP: 002b:00007ffe7b324828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.487614] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbae6f52d82 [ 64.488483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbae638c000 [ 64.489379] RBP: 00007fbae638c000 R08: 0000000000000009 R09: 0000000000001000 [ 64.490232] R10: 0000000000000812 R11: 0000000000000206 R12: 000055863fd23ec0 [ 64.491110] R13: 00007ffe7b324840 R14: 00007ffe7b324870 R15: 00007ffe7b324bd0 [ 64.491997] [ 64.492291] [ 64.492508] Allocated by task 214: [ 64.492969] kasan_save_stack+0x22/0x50 [ 64.493475] kasan_set_track+0x25/0x30 [ 64.494000] __kasan_slab_alloc+0x59/0x70 [ 64.494536] kmem_cache_alloc+0x16b/0x370 [ 64.495080] vm_area_dup+0x20/0x160 [ 64.495540] __split_vma+0x170/0x950 [ 64.496057] split_vma+0xc6/0x110 [ 64.496526] mprotect_fixup+0x8d2/0xb30 [ 64.497063] do_mprotect_pkey+0x87e/0xd40 [ 64.497590] __x64_sys_mprotect+0x78/0xc0 [ 64.498123] do_syscall_64+0x3f/0x90 [ 64.498594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.499256] [ 64.499471] Freed by task 214: [ 64.499869] kasan_save_stack+0x22/0x50 [ 64.500401] kasan_set_track+0x25/0x30 [ 64.500938] kasan_save_free_info+0x2b/0x50 [ 64.501467] __kasan_slab_free+0x10a/0x190 [ 64.502027] kmem_cache_free+0x10d/0x4d0 [ 64.502566] rcu_core+0x8c8/0x2860 [ 64.503025] __do_softirq+0x1b7/0x7d4 [ 64.503523] [ 64.503746] Last potentially related work creation: [ 64.504360] kasan_save_stack+0x22/0x50 [ 64.504918] __kasan_record_aux_stack+0x8e/0xa0 [ 64.505517] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.506177] remove_vma+0x139/0x170 [ 64.506653] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.507224] do_vmi_munmap+0x1f1/0x2b0 [ 64.507724] __vm_munmap+0x138/0x3a0 [ 64.508206] __x64_sys_munmap+0x59/0x80 [ 64.508713] do_syscall_64+0x3f/0x90 [ 64.509208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.509854] [ 64.510078] Second to last potentially related work creation: [ 64.510769] kasan_save_stack+0x22/0x50 [ 64.511311] __kasan_record_aux_stack+0x8e/0xa0 [ 64.511923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.512574] remove_vma+0x139/0x170 [ 64.513076] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.513642] do_vmi_munmap+0x1f1/0x2b0 [ 64.514162] mmap_region+0x1f9/0x2660 [ 64.514651] do_mmap+0x854/0xf00 [ 64.515101] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.515596] ksys_mmap_pgoff+0x3af/0x500 [ 64.516114] do_syscall_64+0x3f/0x90 [ 64.516588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.517266] [ 64.517482] The buggy address belongs to the object at ffff88800ee443a0 [ 64.517482] which belongs to the cache vm_area_struct of size 168 [ 64.518984] The buggy address is located 88 bytes inside of [ 64.518984] freed 168-byte region [ffff88800ee443a0, ffff88800ee44448) [ 64.520411] [ 64.520630] The buggy address belongs to the physical page: [ 64.521340] page:0000000083ed7f44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee44 [ 64.522457] memcg:ffff88800d366501 [ 64.522895] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 64.523596] page_type: 0xffffffff() [ 64.524071] raw: 0100000000000200 ffff88800879fc80 ffffea000059f040 dead000000000005 [ 64.525023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d366501 [ 64.525989] page dumped because: kasan: bad access detected [ 64.526660] [ 64.526892] Memory state around the buggy address: [ 64.527474] ffff88800ee44280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 64.528352] ffff88800ee44300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 64.529256] >ffff88800ee44380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 64.530126] ^ [ 64.531001] ffff88800ee44400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 64.531856] ffff88800ee44480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.532735] ================================================================== [ 64.534177] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 66.729064] BUG: Bad rss-counter state mm:000000006414be32 type:MM_FILEPAGES val:33 [ 66.730223] BUG: Bad rss-counter state mm:000000006414be32 type:MM_ANONPAGES val:22 [ 67.223042] BUG: Bad rss-counter state mm:00000000d21aa79c type:MM_FILEPAGES val:33 [ 67.224196] BUG: Bad rss-counter state mm:00000000d21aa79c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4368' (ECDSA) to the list of known hosts. 2023/06/19 17:56:03 fuzzer started 2023/06/19 17:56:03 dialing manager at localhost:44161 2023/06/19 17:56:03 checking machine... 2023/06/19 17:56:03 checking revisions... [ 67.848691] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:56:03 testing simple program... [ 67.894751] cgroup: Unknown subsys name 'net' [ 67.958131] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:55:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888006af3700 RCX=1ffff11000d5e6ea RDX=1ffff11000d5e6f0 RSI=0000000000000008 RDI=ffff8880181500d0 RBP=ffff88806cf395c0 RSP=ffff88806ce09bd8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff888008c58000 R12=0000000000002b17 R13=ffff888006af3780 R14=ffff888006af3750 R15=0000000000000009 RIP=ffffffff812523a3 RFL=00000046 [---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=00007ffcfa32fcb8 CR3=000000001583c000 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=2033303a36353a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a36353a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c09a5b RBX=ffffffff8604d2dc RCX=ffffffff84506c7e RDX=0000000000000000 RSI=ffffffff864b0222 RDI=ffffffff8604d2b8 RBP=ffffffff8604d2d4 RSP=ffff8880147ef9d8 R8 =ffffffff864b0222 R9 =ffff8880147efad0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffffffff8604d2e8 R13=ffffffff8604d2b8 R14=ffffffff8604d2d0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007f1fbc77f900 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=00007f1fbbb93690 CR3=000000000c6be000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4ce739ca8d9954d000000000000ae988 XMM05=6fe24047017cd604000000000013ea38 XMM06=e4cb8bb95a7664b6000000000013d290 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000