syzkaller login: [ 111.922284] BUG: Bad rss-counter state mm:0000000016601c6f type:MM_FILEPAGES val:33 [ 111.923613] BUG: Bad rss-counter state mm:0000000016601c6f type:MM_ANONPAGES val:22 [ 112.067178] ================================================================== [ 112.068054] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 112.068933] Read of size 8 at addr ffff888016c17c20 by task sshd/219 [ 112.069648] [ 112.069852] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 112.070892] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 112.071823] Call Trace: [ 112.072127] [ 112.072394] dump_stack_lvl+0x91/0xf0 [ 112.072852] print_report+0xcc/0x620 [ 112.073328] ? __virt_addr_valid+0x102/0x340 [ 112.073842] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.074418] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.074999] kasan_report+0xbe/0xf0 [ 112.075456] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.076041] vma_interval_tree_remove+0xc75/0xec0 [ 112.076619] vma_prepare+0xc54/0x11a0 [ 112.077096] __split_vma+0x5af/0x950 [ 112.077553] ? __pfx___split_vma+0x10/0x10 [ 112.078085] ? find_held_lock+0x2c/0x110 [ 112.078585] do_vmi_align_munmap+0x2ba/0x11f0 [ 112.079140] ? lock_is_held_type+0x9f/0x120 [ 112.079676] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 112.080269] ? mtree_range_walk+0x632/0x900 [ 112.080795] ? mas_walk+0x5c7/0x7c0 [ 112.081263] do_vmi_munmap+0x1f1/0x2b0 [ 112.081738] mmap_region+0x1f9/0x2660 [ 112.082215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 112.082714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 112.083443] ? __pfx_lock_acquire+0x10/0x10 [ 112.083972] ? __pfx_mmap_region+0x10/0x10 [ 112.084481] ? security_mmap_addr+0x7d/0xa0 [ 112.084995] ? get_unmapped_area+0x1f5/0x3f0 [ 112.085527] do_mmap+0x854/0xf00 [ 112.085961] vm_mmap_pgoff+0x1a6/0x3a0 [ 112.086446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 112.087017] ksys_mmap_pgoff+0x3af/0x500 [ 112.087518] do_syscall_64+0x3f/0x90 [ 112.087993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.088615] RIP: 0033:0x7f73da80cd82 [ 112.089070] 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 [ 112.091135] RSP: 002b:00007ffd84244d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 112.092056] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73da80cd82 [ 112.092872] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73d9c46000 [ 112.093709] RBP: 00007f73d9c46000 R08: 0000000000000009 R09: 0000000000001000 [ 112.094745] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a269f9db20 [ 112.095761] R13: 00007ffd84244d20 R14: 00007ffd84244d50 R15: 00007ffd842450b0 [ 112.096807] [ 112.097160] [ 112.097421] Allocated by task 212: [ 112.097955] kasan_save_stack+0x22/0x50 [ 112.098580] kasan_set_track+0x25/0x30 [ 112.099197] __kasan_slab_alloc+0x59/0x70 [ 112.099837] kmem_cache_alloc+0x16b/0x370 [ 112.100460] vm_area_dup+0x20/0x160 [ 112.101015] __split_vma+0x170/0x950 [ 112.101573] split_vma+0xc6/0x110 [ 112.102117] mprotect_fixup+0x8d2/0xb30 [ 112.102751] do_mprotect_pkey+0x87e/0xd40 [ 112.103288] __x64_sys_mprotect+0x78/0xc0 [ 112.103808] do_syscall_64+0x3f/0x90 [ 112.104364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.105055] [ 112.105262] Freed by task 212: [ 112.105640] kasan_save_stack+0x22/0x50 [ 112.106222] kasan_set_track+0x25/0x30 [ 112.106769] kasan_save_free_info+0x2b/0x50 [ 112.107293] __kasan_slab_free+0x10a/0x190 [ 112.107811] kmem_cache_free+0x10d/0x4d0 [ 112.108314] rcu_core+0x8c8/0x2860 [ 112.108739] __do_softirq+0x1b7/0x7d4 [ 112.109216] [ 112.109421] Last potentially related work creation: [ 112.110007] kasan_save_stack+0x22/0x50 [ 112.110499] __kasan_record_aux_stack+0x8e/0xa0 [ 112.111068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 112.111758] remove_vma+0x139/0x170 [ 112.112207] do_vmi_align_munmap+0xd4a/0x11f0 [ 112.112736] do_vmi_munmap+0x1f1/0x2b0 [ 112.113214] __vm_munmap+0x138/0x3a0 [ 112.113652] __x64_sys_munmap+0x59/0x80 [ 112.114141] do_syscall_64+0x3f/0x90 [ 112.114586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.115211] [ 112.115427] The buggy address belongs to the object at ffff888016c17bc8 [ 112.115427] which belongs to the cache vm_area_struct of size 168 [ 112.116833] The buggy address is located 88 bytes inside of [ 112.116833] freed 168-byte region [ffff888016c17bc8, ffff888016c17c70) [ 112.118170] [ 112.118371] The buggy address belongs to the physical page: [ 112.118990] page:00000000603c306d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c17 [ 112.120038] memcg:ffff88800c737501 [ 112.120435] flags: 0x100000000000200(slab|node=0|zone=1) [ 112.121041] page_type: 0xffffffff() [ 112.121468] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 112.122351] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c737501 [ 112.123202] page dumped because: kasan: bad access detected [ 112.123823] [ 112.124051] Memory state around the buggy address: [ 112.124592] ffff888016c17b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 112.125410] ffff888016c17b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 112.126209] >ffff888016c17c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 112.127001] ^ [ 112.127496] ffff888016c17c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 112.128294] ffff888016c17d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 112.129091] ================================================================== [ 112.129949] Disabling lock debugging due to kernel taint [ 115.007811] BUG: Bad rss-counter state mm:00000000839907d7 type:MM_FILEPAGES val:33 [ 115.008978] BUG: Bad rss-counter state mm:00000000839907d7 type:MM_ANONPAGES val:22 [ 115.417156] BUG: Bad rss-counter state mm:00000000c80a7f78 type:MM_FILEPAGES val:33 [ 115.418333] BUG: Bad rss-counter state mm:00000000c80a7f78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29443' (ECDSA) to the list of known hosts. 2023/06/20 09:42:56 fuzzer started 2023/06/20 09:42:57 dialing manager at localhost:44161 2023/06/20 09:42:57 checking machine... 2023/06/20 09:42:57 checking revisions... [ 116.177964] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:42:57 testing simple program... [ 116.227580] cgroup: Unknown subsys name 'net' [ 116.273587] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:41:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015c77d90 RCX=ffffffff8162140b RDX=ffff888015c78000 RSI=0000000000000008 RDI=ffffea0000609400 RBP=ffffea0000609400 RSP=ffff888015c77ba0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=ffff888016325e00 R13=000000001639f300 R14=ffff8880095abae0 R15=0000000000000001 RIP=ffffffff8180fd28 RFL=00000293 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd259fd6900 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=00007fd2593e2f70 CR3=000000000c568000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=cb57b1477575131600000000000ae988 XMM05=83a0a7007bf1c613000000000013e030 XMM06=e41d309bca7a4502000000000013cdd0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c415 RBX=ffffffff85dfc9c4 RCX=ffffffff8180c42e RDX=0000000000000000 RSI=ffffffff8613749c RDI=ffffffff85dfc9b4 RBP=ffffffff85dfc9c8 RSP=ffff8880167cf2b8 R8 =ffffffff8613749c R9 =ffff8880167cf3b0 R10=0000000000038001 R11=0000000000020d78 R12=ffffffff85dfc9d4 R13=ffffffff85dfc9b4 R14=ffffffff85dfc9b4 R15=dffffc0000000000 RIP=ffffffff8112fc4f 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 00007f48cd204900 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=000055926c11f954 CR3=000000000d74e000 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