[ 36.404934] BUG: Bad rss-counter state mm:00000000e2a623e2 type:MM_FILEPAGES val:33 [ 36.406129] BUG: Bad rss-counter state mm:00000000e2a623e2 type:MM_ANONPAGES val:22 [ 36.446809] ================================================================== [ 36.447990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.449058] Read of size 8 at addr ffff88800e68a968 by task sshd/220 [ 36.449963] [ 36.450187] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.451133] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.452278] Call Trace: [ 36.452618] [ 36.452910] dump_stack_lvl+0x91/0xf0 [ 36.453429] print_report+0xcc/0x620 [ 36.453930] ? __virt_addr_valid+0x102/0x340 [ 36.454506] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.455149] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.455774] kasan_report+0xbe/0xf0 [ 36.456257] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.456916] vma_interval_tree_remove+0xc75/0xec0 [ 36.457519] vma_prepare+0xc54/0x11a0 [ 36.458008] __split_vma+0x5af/0x950 [ 36.458494] ? __pfx___split_vma+0x10/0x10 [ 36.459024] ? find_held_lock+0x2c/0x110 [ 36.459551] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.460117] ? lock_is_held_type+0x9f/0x120 [ 36.460669] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.461279] ? mtree_range_walk+0x632/0x900 [ 36.461832] ? mas_walk+0x5c7/0x7c0 [ 36.462310] do_vmi_munmap+0x1f1/0x2b0 [ 36.462810] mmap_region+0x1f9/0x2660 [ 36.463297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.463822] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.464545] ? __pfx_lock_acquire+0x10/0x10 [ 36.465107] ? __pfx_mmap_region+0x10/0x10 [ 36.465652] ? security_mmap_addr+0x7d/0xa0 [ 36.466186] ? get_unmapped_area+0x1f5/0x3f0 [ 36.466744] do_mmap+0x854/0xf00 [ 36.467202] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.467707] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.468278] ksys_mmap_pgoff+0x3af/0x500 [ 36.468815] do_syscall_64+0x3f/0x90 [ 36.469310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.469967] RIP: 0033:0x7f85e6baed82 [ 36.470427] 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 [ 36.472567] RSP: 002b:00007ffc65b3ed78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.473480] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85e6baed82 [ 36.474338] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85e5fe8000 [ 36.475190] RBP: 00007f85e5fe8000 R08: 0000000000000009 R09: 0000000000001000 [ 36.476033] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560118c4eec0 [ 36.476894] R13: 00007ffc65b3ed90 R14: 00007ffc65b3edc0 R15: 00007ffc65b3f120 [ 36.477757] [ 36.478062] [ 36.478282] Allocated by task 213: [ 36.478713] kasan_save_stack+0x22/0x50 [ 36.479218] kasan_set_track+0x25/0x30 [ 36.479714] __kasan_slab_alloc+0x59/0x70 [ 36.480240] kmem_cache_alloc+0x16b/0x370 [ 36.480765] vm_area_dup+0x20/0x160 [ 36.481228] __split_vma+0x170/0x950 [ 36.481697] split_vma+0xc6/0x110 [ 36.482147] mprotect_fixup+0x8d2/0xb30 [ 36.482648] do_mprotect_pkey+0x87e/0xd40 [ 36.483169] __x64_sys_mprotect+0x78/0xc0 [ 36.483691] do_syscall_64+0x3f/0x90 [ 36.484179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.484842] [ 36.485062] Freed by task 213: [ 36.485456] kasan_save_stack+0x22/0x50 [ 36.485959] kasan_set_track+0x25/0x30 [ 36.486457] kasan_save_free_info+0x2b/0x50 [ 36.487000] __kasan_slab_free+0x10a/0x190 [ 36.487548] kmem_cache_free+0x10d/0x4d0 [ 36.488060] rcu_core+0x8c8/0x2860 [ 36.488509] __do_softirq+0x1b7/0x7d4 [ 36.489012] [ 36.489230] Last potentially related work creation: [ 36.489843] kasan_save_stack+0x22/0x50 [ 36.490361] __kasan_record_aux_stack+0x8e/0xa0 [ 36.490950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.491618] remove_vma+0x139/0x170 [ 36.492110] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.492696] do_vmi_munmap+0x1f1/0x2b0 [ 36.493182] __vm_munmap+0x138/0x3a0 [ 36.493659] __x64_sys_munmap+0x59/0x80 [ 36.494163] do_syscall_64+0x3f/0x90 [ 36.494642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.495285] [ 36.495509] The buggy address belongs to the object at ffff88800e68a910 [ 36.495509] which belongs to the cache vm_area_struct of size 168 [ 36.496999] The buggy address is located 88 bytes inside of [ 36.496999] freed 168-byte region [ffff88800e68a910, ffff88800e68a9b8) [ 36.498414] [ 36.498633] The buggy address belongs to the physical page: [ 36.499299] page:00000000d4fffbdb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe68a [ 36.500400] memcg:ffff88800d189a01 [ 36.500842] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.501542] page_type: 0xffffffff() [ 36.502003] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.502950] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d189a01 [ 36.503863] page dumped because: kasan: bad access detected [ 36.504513] [ 36.504736] Memory state around the buggy address: [ 36.505308] ffff88800e68a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.506167] ffff88800e68a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.507009] >ffff88800e68a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.507872] ^ [ 36.508646] ffff88800e68a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.509505] ffff88800e68aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.510358] ================================================================== [ 36.511392] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.129594] BUG: Bad rss-counter state mm:0000000036a99dd3 type:MM_FILEPAGES val:33 [ 39.130803] BUG: Bad rss-counter state mm:0000000036a99dd3 type:MM_ANONPAGES val:22 [ 39.582585] BUG: Bad rss-counter state mm:00000000450f8350 type:MM_FILEPAGES val:33 [ 39.583520] BUG: Bad rss-counter state mm:00000000450f8350 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23461' (ECDSA) to the list of known hosts. 2023/06/20 00:41:25 fuzzer started 2023/06/20 00:41:25 dialing manager at localhost:44161 2023/06/20 00:41:26 checking machine... 2023/06/20 00:41:26 checking revisions... [ 40.307793] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:41:26 testing simple program... [ 40.348742] cgroup: Unknown subsys name 'net' [ 40.405115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:41:19 Registers: info registers vcpu 0 RAX=ffffffff863b22f5 RBX=0000000000000001 RCX=ffffffff863b22f0 RDX=dffffc0000000000 RSI=ffffffff863b22f0 RDI=ffffffff85fa3dec RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff863b22f0 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000008aa86 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff81130a50 RFL=00000286 [--S--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 00007fb8f124d900 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=000055b362499768 CR3=000000000c92e000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=0000000000000001 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=00007ffd0e3226e8 CR3=0000000005482000 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=00007f0da2d9f5100000560798615790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000