syzkaller login: [ 38.316906] BUG: Bad rss-counter state mm:0000000002a34e46 type:MM_FILEPAGES val:33 [ 38.318182] BUG: Bad rss-counter state mm:0000000002a34e46 type:MM_ANONPAGES val:22 [ 38.462399] ================================================================== [ 38.463349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.464304] Read of size 8 at addr ffff888009e8a058 by task sshd/220 [ 38.465060] [ 38.465277] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.466240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.467234] Call Trace: [ 38.467648] [ 38.468043] dump_stack_lvl+0x91/0xf0 [ 38.468574] print_report+0xcc/0x620 [ 38.469074] ? __virt_addr_valid+0x102/0x340 [ 38.469663] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.470381] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.471047] kasan_report+0xbe/0xf0 [ 38.471560] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.472263] vma_interval_tree_remove+0xc75/0xec0 [ 38.472942] vma_prepare+0xc54/0x11a0 [ 38.473477] __split_vma+0x5af/0x950 [ 38.474004] ? __pfx___split_vma+0x10/0x10 [ 38.474618] ? find_held_lock+0x2c/0x110 [ 38.475197] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.475816] ? lock_is_held_type+0x9f/0x120 [ 38.476467] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.477127] ? mtree_range_walk+0x632/0x900 [ 38.477737] ? mas_walk+0x5c7/0x7c0 [ 38.478270] do_vmi_munmap+0x1f1/0x2b0 [ 38.478821] mmap_region+0x1f9/0x2660 [ 38.479366] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.479950] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.480739] ? __pfx_lock_acquire+0x10/0x10 [ 38.481335] ? __pfx_mmap_region+0x10/0x10 [ 38.481957] ? security_mmap_addr+0x7d/0xa0 [ 38.482581] ? get_unmapped_area+0x1f5/0x3f0 [ 38.483187] do_mmap+0x854/0xf00 [ 38.483667] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.484205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.484793] ksys_mmap_pgoff+0x3af/0x500 [ 38.485345] do_syscall_64+0x3f/0x90 [ 38.485862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.486579] RIP: 0033:0x7f8f23433d82 [ 38.487066] 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 [ 38.489306] RSP: 002b:00007fffc5242e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.490269] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f23433d82 [ 38.491187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f2286d000 [ 38.492113] RBP: 00007f8f2286d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.493045] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560803ca7f60 [ 38.493988] R13: 00007fffc5242eb0 R14: 00007fffc5242ee0 R15: 00007fffc5243240 [ 38.494949] [ 38.495255] [ 38.495512] Allocated by task 213: [ 38.496005] kasan_save_stack+0x22/0x50 [ 38.496556] kasan_set_track+0x25/0x30 [ 38.497096] __kasan_slab_alloc+0x59/0x70 [ 38.497662] kmem_cache_alloc+0x16b/0x370 [ 38.498239] vm_area_dup+0x20/0x160 [ 38.498751] __split_vma+0x170/0x950 [ 38.499268] split_vma+0xc6/0x110 [ 38.499750] mprotect_fixup+0x8d2/0xb30 [ 38.500311] do_mprotect_pkey+0x87e/0xd40 [ 38.500905] __x64_sys_mprotect+0x78/0xc0 [ 38.501481] do_syscall_64+0x3f/0x90 [ 38.502023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.502721] [ 38.502979] Freed by task 213: [ 38.503418] kasan_save_stack+0x22/0x50 [ 38.503997] kasan_set_track+0x25/0x30 [ 38.504540] kasan_save_free_info+0x2b/0x50 [ 38.505122] __kasan_slab_free+0x10a/0x190 [ 38.505700] kmem_cache_free+0x10d/0x4d0 [ 38.506435] rcu_core+0x8c8/0x2860 [ 38.506940] __do_softirq+0x1b7/0x7d4 [ 38.507437] [ 38.507657] Last potentially related work creation: [ 38.508285] kasan_save_stack+0x22/0x50 [ 38.508805] __kasan_record_aux_stack+0x8e/0xa0 [ 38.509407] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.510102] remove_vma+0x139/0x170 [ 38.510567] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.511163] do_vmi_munmap+0x1f1/0x2b0 [ 38.511665] __vm_munmap+0x138/0x3a0 [ 38.512184] __x64_sys_munmap+0x59/0x80 [ 38.512696] do_syscall_64+0x3f/0x90 [ 38.513193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.513876] [ 38.514114] The buggy address belongs to the object at ffff888009e8a000 [ 38.514114] which belongs to the cache vm_area_struct of size 168 [ 38.515644] The buggy address is located 88 bytes inside of [ 38.515644] freed 168-byte region [ffff888009e8a000, ffff888009e8a0a8) [ 38.517199] [ 38.517420] The buggy address belongs to the physical page: [ 38.518134] page:000000005a0d8060 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9e8a [ 38.519267] memcg:ffff8880146e6101 [ 38.519705] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.520408] page_type: 0xffffffff() [ 38.520886] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.521896] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146e6101 [ 38.522871] page dumped because: kasan: bad access detected [ 38.523569] [ 38.523790] Memory state around the buggy address: [ 38.524438] ffff888009e89f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 38.525351] ffff888009e89f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.526258] >ffff888009e8a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.527197] ^ [ 38.527959] ffff888009e8a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.528839] ffff888009e8a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.529704] ================================================================== [ 38.530751] Disabling lock debugging due to kernel taint [ 41.668711] BUG: Bad rss-counter state mm:000000004747c1af type:MM_FILEPAGES val:33 [ 41.670067] BUG: Bad rss-counter state mm:000000004747c1af type:MM_ANONPAGES val:22 [ 42.076945] BUG: Bad rss-counter state mm:00000000e22abdef type:MM_FILEPAGES val:33 [ 42.077765] BUG: Bad rss-counter state mm:00000000e22abdef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41804' (ECDSA) to the list of known hosts. 2023/06/20 08:00:16 fuzzer started 2023/06/20 08:00:16 dialing manager at localhost:44161 2023/06/20 08:00:16 checking machine... 2023/06/20 08:00:16 checking revisions... [ 42.818177] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:00:17 testing simple program... [ 42.864818] cgroup: Unknown subsys name 'net' [ 42.904964] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:00:13 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff8880102504c0 RCX=ffff8880102504c0 RDX=00000000000d000d RSI=ffff8880102504c0 RDI=ffff88800844f780 RBP=ffff888019d0fc88 RSP=ffff888019d0fbf0 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000409400 R11=00000000000c0008 R12=ffffea0000409400 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007f8c39b59900 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=00007f8c3a10e650 CR3=000000000d97e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88801477f518 RSI=ffffffff818dfeb8 RDI=ffff88801477f518 RBP=ffff88801477f5b0 RSP=ffff88801477f500 R8 =0000000000000001 R9 =ffff88801477f558 R10=0000000000038001 R11=0000000000024543 R12=ffff88801477f5e0 R13=0000000000000000 R14=ffff88801460b680 R15=ffff88801477f518 RIP=ffffffff811305e8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f49269a3900 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=00007f4925dc0590 CR3=000000000c6ea000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d0f3cee3869ec63100000000000ae988 XMM05=5c8fc5cf136ccd5300000000001354a0 XMM06=c00b410db4e1fad20000000000133ed0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000