syzkaller login: [ 30.422574] BUG: Bad rss-counter state mm:0000000065653128 type:MM_FILEPAGES val:33 [ 30.423805] BUG: Bad rss-counter state mm:0000000065653128 type:MM_ANONPAGES val:22 [ 30.460531] ================================================================== [ 30.461489] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.462492] Read of size 8 at addr ffff888016184a50 by task sshd/220 [ 30.463302] [ 30.463531] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.464431] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.465458] Call Trace: [ 30.465792] [ 30.466094] dump_stack_lvl+0x91/0xf0 [ 30.466637] print_report+0xcc/0x620 [ 30.467146] ? __virt_addr_valid+0x102/0x340 [ 30.467724] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.468372] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.469023] kasan_report+0xbe/0xf0 [ 30.469528] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.470207] vma_interval_tree_remove+0xc75/0xec0 [ 30.470872] vma_prepare+0xc54/0x11a0 [ 30.471401] __split_vma+0x5af/0x950 [ 30.471910] ? __pfx___split_vma+0x10/0x10 [ 30.472484] ? find_held_lock+0x2c/0x110 [ 30.473045] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.473659] ? lock_is_held_type+0x9f/0x120 [ 30.474266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.474925] ? mtree_range_walk+0x632/0x900 [ 30.475525] ? mas_walk+0x5c7/0x7c0 [ 30.476037] do_vmi_munmap+0x1f1/0x2b0 [ 30.476578] mmap_region+0x1f9/0x2660 [ 30.477103] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.477668] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.478455] ? __pfx_lock_acquire+0x10/0x10 [ 30.479036] ? __pfx_mmap_region+0x10/0x10 [ 30.479615] ? security_mmap_addr+0x7d/0xa0 [ 30.480192] ? get_unmapped_area+0x1f5/0x3f0 [ 30.480790] do_mmap+0x854/0xf00 [ 30.481272] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.481814] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.482426] ksys_mmap_pgoff+0x3af/0x500 [ 30.482979] do_syscall_64+0x3f/0x90 [ 30.483488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.484194] RIP: 0033:0x7f7e45401d82 [ 30.484966] 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 [ 30.488032] RSP: 002b:00007ffedb163b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.489310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e45401d82 [ 30.490516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e4483b000 [ 30.491743] RBP: 00007f7e4483b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.492931] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562cee166d90 [ 30.494153] R13: 00007ffedb163b70 R14: 00007ffedb163ba0 R15: 00007ffedb163f00 [ 30.495336] [ 30.495734] [ 30.496053] Allocated by task 213: [ 30.496583] kasan_save_stack+0x22/0x50 [ 30.497359] kasan_set_track+0x25/0x30 [ 30.498053] __kasan_slab_alloc+0x59/0x70 [ 30.498818] kmem_cache_alloc+0x16b/0x370 [ 30.499544] vm_area_dup+0x20/0x160 [ 30.500178] __split_vma+0x170/0x950 [ 30.500837] split_vma+0xc6/0x110 [ 30.501475] mprotect_fixup+0x8d2/0xb30 [ 30.502197] do_mprotect_pkey+0x87e/0xd40 [ 30.502829] __x64_sys_mprotect+0x78/0xc0 [ 30.503496] do_syscall_64+0x3f/0x90 [ 30.504014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.504723] [ 30.504956] Freed by task 213: [ 30.505383] kasan_save_stack+0x22/0x50 [ 30.505932] kasan_set_track+0x25/0x30 [ 30.506478] kasan_save_free_info+0x2b/0x50 [ 30.507058] __kasan_slab_free+0x10a/0x190 [ 30.507635] kmem_cache_free+0x10d/0x4d0 [ 30.508189] rcu_core+0x8c8/0x2860 [ 30.508673] __do_softirq+0x1b7/0x7d4 [ 30.509185] [ 30.509418] Last potentially related work creation: [ 30.510048] kasan_save_stack+0x22/0x50 [ 30.510610] __kasan_record_aux_stack+0x8e/0xa0 [ 30.511239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.511934] remove_vma+0x139/0x170 [ 30.512427] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.513037] do_vmi_munmap+0x1f1/0x2b0 [ 30.513564] __vm_munmap+0x138/0x3a0 [ 30.514070] __x64_sys_munmap+0x59/0x80 [ 30.514615] do_syscall_64+0x3f/0x90 [ 30.515125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.515826] [ 30.516059] The buggy address belongs to the object at ffff8880161849f8 [ 30.516059] which belongs to the cache vm_area_struct of size 168 [ 30.517653] The buggy address is located 88 bytes inside of [ 30.517653] freed 168-byte region [ffff8880161849f8, ffff888016184aa0) [ 30.519179] [ 30.519414] The buggy address belongs to the physical page: [ 30.520130] page:00000000cd60ce53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16184 [ 30.521324] memcg:ffff888016111b01 [ 30.521791] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.522502] page_type: 0xffffffff() [ 30.522995] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.524002] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016111b01 [ 30.524984] page dumped because: kasan: bad access detected [ 30.525697] [ 30.525934] Memory state around the buggy address: [ 30.526581] ffff888016184900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.527519] ffff888016184980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.528449] >ffff888016184a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.529371] ^ [ 30.530130] ffff888016184a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.531053] ffff888016184b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.531980] ================================================================== [ 30.533058] Disabling lock debugging due to kernel taint [ 32.582413] BUG: Bad rss-counter state mm:00000000d87b0f93 type:MM_FILEPAGES val:33 [ 32.583394] BUG: Bad rss-counter state mm:00000000d87b0f93 type:MM_ANONPAGES val:22 [ 33.040170] BUG: Bad rss-counter state mm:0000000054c64d5f type:MM_FILEPAGES val:33 [ 33.041239] BUG: Bad rss-counter state mm:0000000054c64d5f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48579' (ECDSA) to the list of known hosts. 2023/06/20 17:46:03 fuzzer started 2023/06/20 17:46:03 dialing manager at localhost:36067 2023/06/20 17:46:04 checking machine... 2023/06/20 17:46:04 checking revisions... [ 33.746068] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:46:04 testing simple program... [ 33.798458] cgroup: Unknown subsys name 'net' [ 33.856592] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:46:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f5bd6414400 CR3=000000000d800000 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=80d55b6a85fa71b2d849e51184fd6f22 XMM02=eff9b2d0a8fce9cb0000000000119dc8 XMM03=2c67c8bc2e329bc30000000000119ef0 XMM04=bd5c57159bc9c21300000000000ae988 XMM05=db3ae9b8ac3f9f460000000000132888 XMM06=9bb65c6465e76ad10000000000131628 XMM07=fb795ef6d657705600000000001215a0 XMM08=2c67c8bc2e329bc30000000000119ef0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=00005627b89662b0 RCX=00005627b8922010 RDX=0000000000000001 RSI=0000000000000007 RDI=00005627b8951b80 RBP=0000000000000008 RSP=00007ffcc290d4c0 R8 =00005627b8966540 R9 =00007fea7891a060 R10=00007ffcc290d117 R11=0000000000000000 R12=00005627b8952b70 R13=00005627b8966310 R14=00005627b89692b0 R15=00007ffcc290d510 RIP=00007fea788fcd65 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fea77dc0900 00000000 00000000 GS =0000 0000000000000000 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=00007fea78377618 CR3=000000000dab4000 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=00000000000000000000000000000000 XMM02=0000000000000000ffffffffff000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=656e696c203a7325000000000075252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000