syzkaller login: [ 37.697838] BUG: Bad rss-counter state mm:00000000f360d26e type:MM_FILEPAGES val:33 [ 37.698859] BUG: Bad rss-counter state mm:00000000f360d26e type:MM_ANONPAGES val:22 [ 37.857070] ================================================================== [ 37.857971] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.858910] Read of size 8 at addr ffff88800f9edc20 by task sshd/220 [ 37.859685] [ 37.859902] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.860892] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.861875] Call Trace: [ 37.862194] [ 37.862479] dump_stack_lvl+0x91/0xf0 [ 37.862976] print_report+0xcc/0x620 [ 37.863467] ? __virt_addr_valid+0x102/0x340 [ 37.864047] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.864670] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.865289] kasan_report+0xbe/0xf0 [ 37.865765] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.866389] vma_interval_tree_remove+0xc75/0xec0 [ 37.866987] vma_prepare+0xc54/0x11a0 [ 37.867465] __split_vma+0x5af/0x950 [ 37.867955] ? __pfx___split_vma+0x10/0x10 [ 37.868482] ? find_held_lock+0x2c/0x110 [ 37.869006] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.869574] ? lock_is_held_type+0x9f/0x120 [ 37.870115] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.870724] ? mtree_range_walk+0x632/0x900 [ 37.871272] ? mas_walk+0x5c7/0x7c0 [ 37.871764] do_vmi_munmap+0x1f1/0x2b0 [ 37.872257] mmap_region+0x1f9/0x2660 [ 37.872743] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.873267] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.874015] ? __pfx_lock_acquire+0x10/0x10 [ 37.874556] ? __pfx_mmap_region+0x10/0x10 [ 37.875085] ? security_mmap_addr+0x7d/0xa0 [ 37.875643] ? get_unmapped_area+0x1f5/0x3f0 [ 37.876190] do_mmap+0x854/0xf00 [ 37.876632] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.877147] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.877718] ksys_mmap_pgoff+0x3af/0x500 [ 37.878228] do_syscall_64+0x3f/0x90 [ 37.878697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.879342] RIP: 0033:0x7f5e50e04d82 [ 37.879812] 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 [ 37.881941] RSP: 002b:00007ffe9c34fd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.882857] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e50e04d82 [ 37.883731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e5023e000 [ 37.884588] RBP: 00007f5e5023e000 R08: 0000000000000009 R09: 0000000000001000 [ 37.885484] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a68a69b20 [ 37.886344] R13: 00007ffe9c34fd20 R14: 00007ffe9c34fd50 R15: 00007ffe9c3500b0 [ 37.887199] [ 37.887508] [ 37.887723] Allocated by task 213: [ 37.888154] kasan_save_stack+0x22/0x50 [ 37.888669] kasan_set_track+0x25/0x30 [ 37.889163] __kasan_slab_alloc+0x59/0x70 [ 37.889696] kmem_cache_alloc+0x16b/0x370 [ 37.890224] vm_area_dup+0x20/0x160 [ 37.890687] __split_vma+0x170/0x950 [ 37.891157] split_vma+0xc6/0x110 [ 37.891620] mprotect_fixup+0x8d2/0xb30 [ 37.892122] do_mprotect_pkey+0x87e/0xd40 [ 37.892640] __x64_sys_mprotect+0x78/0xc0 [ 37.893161] do_syscall_64+0x3f/0x90 [ 37.893643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.894295] [ 37.894514] Freed by task 213: [ 37.894910] kasan_save_stack+0x22/0x50 [ 37.895413] kasan_set_track+0x25/0x30 [ 37.895918] kasan_save_free_info+0x2b/0x50 [ 37.896454] __kasan_slab_free+0x10a/0x190 [ 37.896991] kmem_cache_free+0x10d/0x4d0 [ 37.897504] rcu_core+0x8c8/0x2860 [ 37.897960] __do_softirq+0x1b7/0x7d4 [ 37.898440] [ 37.898656] Last potentially related work creation: [ 37.899274] kasan_save_stack+0x22/0x50 [ 37.899794] __kasan_record_aux_stack+0x8e/0xa0 [ 37.900420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.901076] remove_vma+0x139/0x170 [ 37.901522] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.902138] do_vmi_munmap+0x1f1/0x2b0 [ 37.902625] __vm_munmap+0x138/0x3a0 [ 37.903098] __x64_sys_munmap+0x59/0x80 [ 37.903609] do_syscall_64+0x3f/0x90 [ 37.904088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.904735] [ 37.904949] The buggy address belongs to the object at ffff88800f9edbc8 [ 37.904949] which belongs to the cache vm_area_struct of size 168 [ 37.906422] The buggy address is located 88 bytes inside of [ 37.906422] freed 168-byte region [ffff88800f9edbc8, ffff88800f9edc70) [ 37.907859] [ 37.908074] The buggy address belongs to the physical page: [ 37.908745] page:0000000025caeed9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf9ed [ 37.909882] memcg:ffff888010130601 [ 37.910324] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.910992] page_type: 0xffffffff() [ 37.911458] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.912408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010130601 [ 37.913315] page dumped because: kasan: bad access detected [ 37.913973] [ 37.914192] Memory state around the buggy address: [ 37.914773] ffff88800f9edb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.915656] ffff88800f9edb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 37.916509] >ffff88800f9edc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.917366] ^ [ 37.917898] ffff88800f9edc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.918758] ffff88800f9edd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.919637] ================================================================== [ 37.920644] Disabling lock debugging due to kernel taint [ 39.897396] BUG: Bad rss-counter state mm:00000000bb608ee3 type:MM_FILEPAGES val:33 [ 39.898581] BUG: Bad rss-counter state mm:00000000bb608ee3 type:MM_ANONPAGES val:22 [ 40.261046] BUG: Bad rss-counter state mm:0000000065debcb8 type:MM_FILEPAGES val:33 [ 40.262707] BUG: Bad rss-counter state mm:0000000065debcb8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18164' (ECDSA) to the list of known hosts. 2023/06/20 05:00:13 fuzzer started 2023/06/20 05:00:13 dialing manager at localhost:44161 2023/06/20 05:00:13 checking machine... 2023/06/20 05:00:13 checking revisions... [ 40.970606] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:00:13 testing simple program... [ 41.023383] cgroup: Unknown subsys name 'net' [ 41.065257] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:00:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880160dbe20 RCX=ffffffff81656079 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffea000056df00 RBP=ffffea000056df00 RSP=ffff8880103a79b0 R8 =0000000000000000 R9 =ffffea000056df07 R10=ffffea000056df07 R11=00000000000b6c88 R12=0000000000000293 R13=ffff8880160dc050 R14=0000000000000001 R15=0000000000000001 RIP=ffffffff8180ef09 RFL=00000012 [----A--] 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 00007f7fb7ec0900 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=00007f7fb72d5240 CR3=000000000d640000 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=ee3882e98d261b6d00000000000ae988 XMM05=f2be6d2620ec6c520000000000134e38 XMM06=19e9129bd510f2350000000000133c98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffffffff84531da7 RDI=ffff88806cf09b18 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a40 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888018d36200 RIP=ffffffff813ad42f 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 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=00007ffdf9d808a8 CR3=0000000005482000 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=00007fbe26a1c510000055b13094e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000