syzkaller login: [ 47.925039] BUG: Bad rss-counter state mm:000000007c391a08 type:MM_FILEPAGES val:33 [ 47.926427] BUG: Bad rss-counter state mm:000000007c391a08 type:MM_ANONPAGES val:22 [ 48.067950] ================================================================== [ 48.069025] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.070132] Read of size 8 at addr ffff88800cbb6310 by task sshd/220 [ 48.071247] [ 48.071495] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.072361] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.073360] Call Trace: [ 48.073678] [ 48.073963] dump_stack_lvl+0x91/0xf0 [ 48.074451] print_report+0xcc/0x620 [ 48.074937] ? __virt_addr_valid+0x102/0x340 [ 48.075493] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.076103] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.076720] kasan_report+0xbe/0xf0 [ 48.077195] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.077809] vma_interval_tree_remove+0xc75/0xec0 [ 48.078408] vma_prepare+0xc54/0x11a0 [ 48.078894] __split_vma+0x5af/0x950 [ 48.079363] ? __pfx___split_vma+0x10/0x10 [ 48.079883] ? find_held_lock+0x2c/0x110 [ 48.080396] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.080957] ? lock_is_held_type+0x9f/0x120 [ 48.081485] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.082083] ? mtree_range_walk+0x632/0x900 [ 48.082630] ? mas_walk+0x5c7/0x7c0 [ 48.083119] do_vmi_munmap+0x1f1/0x2b0 [ 48.083614] mmap_region+0x1f9/0x2660 [ 48.084093] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.084603] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.085314] ? __pfx_lock_acquire+0x10/0x10 [ 48.085848] ? __pfx_mmap_region+0x10/0x10 [ 48.086372] ? security_mmap_addr+0x7d/0xa0 [ 48.086910] ? get_unmapped_area+0x1f5/0x3f0 [ 48.087458] do_mmap+0x854/0xf00 [ 48.087896] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.088382] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.088941] ksys_mmap_pgoff+0x3af/0x500 [ 48.089444] do_syscall_64+0x3f/0x90 [ 48.089923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.090573] RIP: 0033:0x7f787ad0ed82 [ 48.091036] 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 [ 48.093128] RSP: 002b:00007ffc6bbb91f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.094044] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f787ad0ed82 [ 48.094906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f787a148000 [ 48.095746] RBP: 00007f787a148000 R08: 0000000000000009 R09: 0000000000001000 [ 48.096592] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8eeb1aec0 [ 48.097511] R13: 00007ffc6bbb9210 R14: 00007ffc6bbb9240 R15: 00007ffc6bbb95a0 [ 48.098422] [ 48.098726] [ 48.098950] Allocated by task 213: [ 48.099384] kasan_save_stack+0x22/0x50 [ 48.099908] kasan_set_track+0x25/0x30 [ 48.100415] __kasan_slab_alloc+0x59/0x70 [ 48.100950] kmem_cache_alloc+0x16b/0x370 [ 48.101474] vm_area_dup+0x20/0x160 [ 48.101928] __split_vma+0x170/0x950 [ 48.102421] split_vma+0xc6/0x110 [ 48.102894] mprotect_fixup+0x8d2/0xb30 [ 48.103394] do_mprotect_pkey+0x87e/0xd40 [ 48.103923] __x64_sys_mprotect+0x78/0xc0 [ 48.104461] do_syscall_64+0x3f/0x90 [ 48.104945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.105611] [ 48.105829] Freed by task 213: [ 48.106232] kasan_save_stack+0x22/0x50 [ 48.106750] kasan_set_track+0x25/0x30 [ 48.107248] kasan_save_free_info+0x2b/0x50 [ 48.107786] __kasan_slab_free+0x10a/0x190 [ 48.108325] kmem_cache_free+0x10d/0x4d0 [ 48.108839] rcu_core+0x8c8/0x2860 [ 48.109286] __do_softirq+0x1b7/0x7d4 [ 48.109772] [ 48.109988] Last potentially related work creation: [ 48.110589] kasan_save_stack+0x22/0x50 [ 48.111117] __kasan_record_aux_stack+0x8e/0xa0 [ 48.111782] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.112427] remove_vma+0x139/0x170 [ 48.112884] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.113443] do_vmi_munmap+0x1f1/0x2b0 [ 48.113940] __vm_munmap+0x138/0x3a0 [ 48.114407] __x64_sys_munmap+0x59/0x80 [ 48.114920] do_syscall_64+0x3f/0x90 [ 48.115399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.116062] [ 48.116280] The buggy address belongs to the object at ffff88800cbb62b8 [ 48.116280] which belongs to the cache vm_area_struct of size 168 [ 48.117763] The buggy address is located 88 bytes inside of [ 48.117763] freed 168-byte region [ffff88800cbb62b8, ffff88800cbb6360) [ 48.119237] [ 48.119461] The buggy address belongs to the physical page: [ 48.120126] page:00000000f958ba15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbb6 [ 48.121211] memcg:ffff888013137a01 [ 48.121645] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.122304] page_type: 0xffffffff() [ 48.122772] raw: 0100000000000200 ffff88800879fc80 ffffea00003dbd40 dead000000000004 [ 48.123692] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013137a01 [ 48.124607] page dumped because: kasan: bad access detected [ 48.125270] [ 48.125488] Memory state around the buggy address: [ 48.126074] ffff88800cbb6200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 48.126990] ffff88800cbb6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 48.128018] >ffff88800cbb6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 48.129081] ^ [ 48.129665] ffff88800cbb6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 48.130743] ffff88800cbb6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 48.131806] ================================================================== [ 48.133051] Disabling lock debugging due to kernel taint [ 50.547916] BUG: Bad rss-counter state mm:000000007ad20c17 type:MM_FILEPAGES val:33 [ 50.549079] BUG: Bad rss-counter state mm:000000007ad20c17 type:MM_ANONPAGES val:22 [ 51.037918] BUG: Bad rss-counter state mm:00000000d6a3d3a3 type:MM_FILEPAGES val:33 [ 51.038938] BUG: Bad rss-counter state mm:00000000d6a3d3a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60560' (ECDSA) to the list of known hosts. 2023/06/19 13:03:37 fuzzer started 2023/06/19 13:03:37 dialing manager at localhost:44161 2023/06/19 13:03:37 checking machine... 2023/06/19 13:03:37 checking revisions... [ 51.797618] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:03:37 testing simple program... [ 51.849275] cgroup: Unknown subsys name 'net' [ 51.900432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:03:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=ffffffff8121affb RDX=ffffed10011ae004 RSI=0000000000000004 RDI=ffff888008d70018 RBP=ffff8880087a5280 RSP=ffff888008d7fec8 R8 =0000000000000001 R9 =ffffed10011ae003 R10=ffff888008d7001b R11=0000000000000000 R12=ffffffff854e8ec0 R13=ffff888008d70000 R14=ffff888008d70000 R15=0000000000000000 RIP=ffffffff81201214 RFL=00000282 [--S----] 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 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=00007ffe1a8438f8 CR3=000000000e7cc000 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=2036333a33303a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33303a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff110031c5e78 RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888018e2f3b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d8238 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000047 [---Z-PC] 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 00007f18919e4900 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=00007f1891f9b618 CR3=000000000ebb6000 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=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