syzkaller login: [ 44.584248] BUG: Bad rss-counter state mm:00000000ff4e9ff0 type:MM_FILEPAGES val:33 [ 44.585905] BUG: Bad rss-counter state mm:00000000ff4e9ff0 type:MM_ANONPAGES val:22 [ 44.740894] ================================================================== [ 44.741781] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.742627] Read of size 8 at addr ffff88800cac8a50 by task sshd/219 [ 44.743322] [ 44.743524] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.744496] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.745419] Call Trace: [ 44.745710] [ 44.745969] dump_stack_lvl+0x91/0xf0 [ 44.746428] print_report+0xcc/0x620 [ 44.746864] ? __virt_addr_valid+0x102/0x340 [ 44.747365] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.747929] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.748489] kasan_report+0xbe/0xf0 [ 44.748917] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.749487] vma_interval_tree_remove+0xc75/0xec0 [ 44.750034] vma_prepare+0xc54/0x11a0 [ 44.750466] __split_vma+0x5af/0x950 [ 44.750891] ? __pfx___split_vma+0x10/0x10 [ 44.751370] ? find_held_lock+0x2c/0x110 [ 44.751847] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.752355] ? lock_is_held_type+0x9f/0x120 [ 44.752854] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.753418] ? mtree_range_walk+0x632/0x900 [ 44.753912] ? mas_walk+0x5c7/0x7c0 [ 44.754338] do_vmi_munmap+0x1f1/0x2b0 [ 44.754781] mmap_region+0x1f9/0x2660 [ 44.755222] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.755691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.756339] ? __pfx_lock_acquire+0x10/0x10 [ 44.756822] ? __pfx_mmap_region+0x10/0x10 [ 44.757312] ? security_mmap_addr+0x7d/0xa0 [ 44.757789] ? get_unmapped_area+0x1f5/0x3f0 [ 44.758293] do_mmap+0x854/0xf00 [ 44.758690] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.759142] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.759654] ksys_mmap_pgoff+0x3af/0x500 [ 44.760120] do_syscall_64+0x3f/0x90 [ 44.760556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.761149] RIP: 0033:0x7f441cb9ed82 [ 44.761583] 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 [ 44.763548] RSP: 002b:00007ffd47c044a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.764387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f441cb9ed82 [ 44.765174] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f441bfd8000 [ 44.765963] RBP: 00007f441bfd8000 R08: 0000000000000009 R09: 0000000000001000 [ 44.766739] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b701e95ec0 [ 44.767527] R13: 00007ffd47c044c0 R14: 00007ffd47c044f0 R15: 00007ffd47c04850 [ 44.768320] [ 44.768593] [ 44.768788] Allocated by task 212: [ 44.769202] kasan_save_stack+0x22/0x50 [ 44.769671] kasan_set_track+0x25/0x30 [ 44.770123] __kasan_slab_alloc+0x59/0x70 [ 44.770608] kmem_cache_alloc+0x16b/0x370 [ 44.771094] vm_area_dup+0x20/0x160 [ 44.771514] __split_vma+0x170/0x950 [ 44.771950] split_vma+0xc6/0x110 [ 44.772351] mprotect_fixup+0x8d2/0xb30 [ 44.772812] do_mprotect_pkey+0x87e/0xd40 [ 44.773296] __x64_sys_mprotect+0x78/0xc0 [ 44.773776] do_syscall_64+0x3f/0x90 [ 44.774211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.774797] [ 44.774998] Freed by task 212: [ 44.775359] kasan_save_stack+0x22/0x50 [ 44.775821] kasan_set_track+0x25/0x30 [ 44.776271] kasan_save_free_info+0x2b/0x50 [ 44.776756] __kasan_slab_free+0x10a/0x190 [ 44.777256] kmem_cache_free+0x10d/0x4d0 [ 44.777716] rcu_core+0x8c8/0x2860 [ 44.778123] __do_softirq+0x1b7/0x7d4 [ 44.778568] [ 44.778763] Last potentially related work creation: [ 44.779299] kasan_save_stack+0x22/0x50 [ 44.779758] __kasan_record_aux_stack+0x8e/0xa0 [ 44.780282] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.780868] remove_vma+0x139/0x170 [ 44.781295] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.781821] do_vmi_munmap+0x1f1/0x2b0 [ 44.782285] __vm_munmap+0x138/0x3a0 [ 44.782717] __x64_sys_munmap+0x59/0x80 [ 44.783179] do_syscall_64+0x3f/0x90 [ 44.783622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.784218] [ 44.784416] The buggy address belongs to the object at ffff88800cac89f8 [ 44.784416] which belongs to the cache vm_area_struct of size 168 [ 44.785795] The buggy address is located 88 bytes inside of [ 44.785795] freed 168-byte region [ffff88800cac89f8, ffff88800cac8aa0) [ 44.787199] [ 44.787402] The buggy address belongs to the physical page: [ 44.788026] page:00000000248866b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcac8 [ 44.789038] memcg:ffff88800e882601 [ 44.789453] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.790056] page_type: 0xffffffff() [ 44.790476] raw: 0100000000000200 ffff88800879fc80 ffffea00003afc80 dead000000000006 [ 44.791335] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e882601 [ 44.792174] page dumped because: kasan: bad access detected [ 44.792782] [ 44.792981] Memory state around the buggy address: [ 44.793532] ffff88800cac8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.794328] ffff88800cac8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 44.795127] >ffff88800cac8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.795914] ^ [ 44.796569] ffff88800cac8a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 44.797383] ffff88800cac8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.798187] ================================================================== [ 44.799057] Disabling lock debugging due to kernel taint [ 47.559250] BUG: Bad rss-counter state mm:00000000b5e193f2 type:MM_FILEPAGES val:33 [ 47.560423] BUG: Bad rss-counter state mm:00000000b5e193f2 type:MM_ANONPAGES val:22 [ 47.990195] BUG: Bad rss-counter state mm:00000000377dd1b1 type:MM_FILEPAGES val:33 [ 47.991183] BUG: Bad rss-counter state mm:00000000377dd1b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22505' (ECDSA) to the list of known hosts. 2023/06/19 22:53:35 fuzzer started 2023/06/19 22:53:35 dialing manager at localhost:44161 2023/06/19 22:53:35 checking machine... 2023/06/19 22:53:35 checking revisions... [ 48.719732] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:53:35 testing simple program... [ 48.758750] cgroup: Unknown subsys name 'net' [ 48.811556] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:53:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e10 RDI=ffffffff8180995d RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888014748000 R15=ffff88801a9beb30 RIP=ffffffff811303b2 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 00007f6a5e906900 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=00007f6a5de27000 CR3=000000000d93c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6b69e5846ee16f6b00000000000ae988 XMM05=f4b6c22618b47d2e0000000000135e68 XMM06=806171799158d9670000000000134c58 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=1ffff1100d9e135a RSI=1ffff1100d9e1359 RDI=1ffff1100d9e1359 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff864b024a R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88801927ff58 R15=ffff88806cf09a70 RIP=ffffffff811310ce 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 00007fea84b7c900 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=00007fea85133618 CR3=000000000c4fc000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000