syzkaller login: [ 39.285265] BUG: Bad rss-counter state mm:0000000013c1806a type:MM_FILEPAGES val:33 [ 39.286329] BUG: Bad rss-counter state mm:0000000013c1806a type:MM_ANONPAGES val:22 [ 39.445841] ================================================================== [ 39.446837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.447839] Read of size 8 at addr ffff88800db635c8 by task sshd/221 [ 39.448773] [ 39.449011] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.449951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.451011] Call Trace: [ 39.451358] [ 39.451663] dump_stack_lvl+0x91/0xf0 [ 39.452182] print_report+0xcc/0x620 [ 39.452697] ? __virt_addr_valid+0x102/0x340 [ 39.453309] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.453931] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.454599] kasan_report+0xbe/0xf0 [ 39.455126] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.455813] vma_interval_tree_remove+0xc75/0xec0 [ 39.456455] vma_prepare+0xc54/0x11a0 [ 39.456936] __split_vma+0x5af/0x950 [ 39.457454] ? __pfx___split_vma+0x10/0x10 [ 39.458033] ? find_held_lock+0x2c/0x110 [ 39.458624] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.459238] ? lock_is_held_type+0x9f/0x120 [ 39.459815] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.460478] ? mtree_range_walk+0x632/0x900 [ 39.461089] ? mas_walk+0x5c7/0x7c0 [ 39.461581] do_vmi_munmap+0x1f1/0x2b0 [ 39.462078] mmap_region+0x1f9/0x2660 [ 39.462607] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.463169] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.463964] ? __pfx_lock_acquire+0x10/0x10 [ 39.464519] ? __pfx_mmap_region+0x10/0x10 [ 39.465052] ? security_mmap_addr+0x7d/0xa0 [ 39.465661] ? get_unmapped_area+0x1f5/0x3f0 [ 39.466280] do_mmap+0x854/0xf00 [ 39.466762] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.467307] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.467934] ksys_mmap_pgoff+0x3af/0x500 [ 39.468478] do_syscall_64+0x3f/0x90 [ 39.468954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.469662] RIP: 0033:0x7f38ac3f0d82 [ 39.470165] 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 [ 39.472502] RSP: 002b:00007fff7e56fe48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.473456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38ac3f0d82 [ 39.474405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38ab82a000 [ 39.475362] RBP: 00007f38ab82a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.476300] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a5c5140ec0 [ 39.477221] R13: 00007fff7e56fe60 R14: 00007fff7e56fe90 R15: 00007fff7e5701f0 [ 39.478143] [ 39.478462] [ 39.478696] Allocated by task 214: [ 39.479159] kasan_save_stack+0x22/0x50 [ 39.479680] kasan_set_track+0x25/0x30 [ 39.480178] __kasan_slab_alloc+0x59/0x70 [ 39.480703] kmem_cache_alloc+0x16b/0x370 [ 39.481230] vm_area_dup+0x20/0x160 [ 39.481684] __split_vma+0x170/0x950 [ 39.482161] split_vma+0xc6/0x110 [ 39.482600] mprotect_fixup+0x8d2/0xb30 [ 39.483108] do_mprotect_pkey+0x87e/0xd40 [ 39.483630] __x64_sys_mprotect+0x78/0xc0 [ 39.484164] do_syscall_64+0x3f/0x90 [ 39.484645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.485294] [ 39.485511] Freed by task 19: [ 39.485900] kasan_save_stack+0x22/0x50 [ 39.486414] kasan_set_track+0x25/0x30 [ 39.486908] kasan_save_free_info+0x2b/0x50 [ 39.487461] __kasan_slab_free+0x10a/0x190 [ 39.488000] kmem_cache_free+0x10d/0x4d0 [ 39.488517] rcu_core+0x8c8/0x2860 [ 39.488961] __do_softirq+0x1b7/0x7d4 [ 39.489467] [ 39.489679] Last potentially related work creation: [ 39.490275] kasan_save_stack+0x22/0x50 [ 39.490787] __kasan_record_aux_stack+0x8e/0xa0 [ 39.491362] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.492009] remove_vma+0x139/0x170 [ 39.492469] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.493038] do_vmi_munmap+0x1f1/0x2b0 [ 39.493535] __vm_munmap+0x138/0x3a0 [ 39.494005] __x64_sys_munmap+0x59/0x80 [ 39.494509] do_syscall_64+0x3f/0x90 [ 39.494980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.495625] [ 39.495843] The buggy address belongs to the object at ffff88800db63570 [ 39.495843] which belongs to the cache vm_area_struct of size 168 [ 39.497332] The buggy address is located 88 bytes inside of [ 39.497332] freed 168-byte region [ffff88800db63570, ffff88800db63618) [ 39.498752] [ 39.498970] The buggy address belongs to the physical page: [ 39.499637] page:0000000061148db2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb63 [ 39.500728] memcg:ffff88800eacae01 [ 39.501156] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.501833] page_type: 0xffffffff() [ 39.502296] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.503217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eacae01 [ 39.504129] page dumped because: kasan: bad access detected [ 39.504806] [ 39.505028] Memory state around the buggy address: [ 39.505620] ffff88800db63480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.506484] ffff88800db63500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.507362] >ffff88800db63580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.508230] ^ [ 39.508909] ffff88800db63600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.509815] ffff88800db63680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.510685] ================================================================== [ 39.512082] Disabling lock debugging due to kernel taint [ 42.088363] BUG: Bad rss-counter state mm:000000002315cff2 type:MM_FILEPAGES val:33 [ 42.089446] BUG: Bad rss-counter state mm:000000002315cff2 type:MM_ANONPAGES val:22 [ 42.585061] BUG: Bad rss-counter state mm:0000000037c4f3c9 type:MM_FILEPAGES val:33 [ 42.586152] BUG: Bad rss-counter state mm:0000000037c4f3c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45630' (ECDSA) to the list of known hosts. 2023/06/19 11:02:08 fuzzer started 2023/06/19 11:02:09 dialing manager at localhost:44161 2023/06/19 11:02:09 checking machine... 2023/06/19 11:02:09 checking revisions... [ 43.299453] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:02:09 testing simple program... [ 43.344695] cgroup: Unknown subsys name 'net' [ 43.404906] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:02:08 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fd53 RSP=ffff88806ce09da8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000202 R13=ffff888016ec9630 R14=ffffffff8186b9c5 R15=ffff88800da7bb00 RIP=ffffffff8135b930 RFL=00000086 [--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 00007f02e21c1900 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=00007f02e2776650 CR3=000000001baf0000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c2f9db RBX=ffff88800e17cea8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e17ced8 RBP=ffff888016072d38 RSP=ffff888008e57cb8 R8 =0000000000000001 R9 =ffffed10011caf8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888016073a70 R14=ffffffff813782a8 R15=ffff88800da7bb00 RIP=ffffffff8184636c 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 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=00007fa7502343f0 CR3=000000000e53a000 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=5a85605fcc06dd9deb46eb12b14e5921 XMM02=ec2efd57dc4c00df000000000011d678 XMM03=cbcfa13de4c651b2000000000011d748 XMM04=6fe616284ca2abb800000000000ae988 XMM05=cb141552a092ef280000000000135738 XMM06=c291bd5c70af25b90000000000133bb0 XMM07=fb795ef6d65770560000000000124490 XMM08=2c67c8bc2e329bc3000000000011d6e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000