syzkaller login: [ 38.716408] BUG: Bad rss-counter state mm:00000000ed9a36e5 type:MM_FILEPAGES val:33 [ 38.717847] BUG: Bad rss-counter state mm:00000000ed9a36e5 type:MM_ANONPAGES val:22 [ 38.862788] ================================================================== [ 38.863956] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.865279] Read of size 8 at addr ffff8880181675c8 by task sshd/218 [ 38.866334] [ 38.866610] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.867539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.868554] Call Trace: [ 38.868885] [ 38.869179] dump_stack_lvl+0x91/0xf0 [ 38.869694] print_report+0xcc/0x620 [ 38.870202] ? __virt_addr_valid+0x102/0x340 [ 38.870783] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871433] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.872086] kasan_report+0xbe/0xf0 [ 38.872581] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873225] vma_interval_tree_remove+0xc75/0xec0 [ 38.873852] vma_prepare+0xc54/0x11a0 [ 38.874367] __split_vma+0x5af/0x950 [ 38.874862] ? __pfx___split_vma+0x10/0x10 [ 38.875424] ? find_held_lock+0x2c/0x110 [ 38.875966] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.876554] ? lock_is_held_type+0x9f/0x120 [ 38.877126] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.877779] ? mtree_range_walk+0x632/0x900 [ 38.878394] ? mas_walk+0x5c7/0x7c0 [ 38.878887] do_vmi_munmap+0x1f1/0x2b0 [ 38.879396] mmap_region+0x1f9/0x2660 [ 38.879899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.880439] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.881178] ? __pfx_lock_acquire+0x10/0x10 [ 38.881742] ? __pfx_mmap_region+0x10/0x10 [ 38.882311] ? security_mmap_addr+0x7d/0xa0 [ 38.882873] ? get_unmapped_area+0x1f5/0x3f0 [ 38.883447] do_mmap+0x854/0xf00 [ 38.883911] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.884434] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.885013] ksys_mmap_pgoff+0x3af/0x500 [ 38.885534] do_syscall_64+0x3f/0x90 [ 38.886033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.886735] RIP: 0033:0x7f2bf9478d82 [ 38.887221] 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 [ 38.889456] RSP: 002b:00007ffcf05617c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.890424] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2bf9478d82 [ 38.891311] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2bf88b2000 [ 38.892207] RBP: 00007f2bf88b2000 R08: 0000000000000009 R09: 0000000000001000 [ 38.893086] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b825111b20 [ 38.893974] R13: 00007ffcf05617e0 R14: 00007ffcf0561810 R15: 00007ffcf0561b70 [ 38.894881] [ 38.895185] [ 38.895409] Allocated by task 211: [ 38.895854] kasan_save_stack+0x22/0x50 [ 38.896383] kasan_set_track+0x25/0x30 [ 38.896888] __kasan_slab_alloc+0x59/0x70 [ 38.897446] kmem_cache_alloc+0x16b/0x370 [ 38.897988] vm_area_dup+0x20/0x160 [ 38.898476] __split_vma+0x170/0x950 [ 38.898957] split_vma+0xc6/0x110 [ 38.899419] mprotect_fixup+0x8d2/0xb30 [ 38.899933] do_mprotect_pkey+0x87e/0xd40 [ 38.900474] __x64_sys_mprotect+0x78/0xc0 [ 38.901025] do_syscall_64+0x3f/0x90 [ 38.901520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902198] [ 38.902425] Freed by task 211: [ 38.902837] kasan_save_stack+0x22/0x50 [ 38.903357] kasan_set_track+0x25/0x30 [ 38.903880] kasan_save_free_info+0x2b/0x50 [ 38.904439] __kasan_slab_free+0x10a/0x190 [ 38.905002] kmem_cache_free+0x10d/0x4d0 [ 38.905535] rcu_core+0x8c8/0x2860 [ 38.905993] __do_softirq+0x1b7/0x7d4 [ 38.906508] [ 38.906779] Last potentially related work creation: [ 38.907397] kasan_save_stack+0x22/0x50 [ 38.907919] __kasan_record_aux_stack+0x8e/0xa0 [ 38.908523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.909197] remove_vma+0x139/0x170 [ 38.909674] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.910275] do_vmi_munmap+0x1f1/0x2b0 [ 38.910795] __vm_munmap+0x138/0x3a0 [ 38.911286] __x64_sys_munmap+0x59/0x80 [ 38.911811] do_syscall_64+0x3f/0x90 [ 38.912316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912992] [ 38.913223] The buggy address belongs to the object at ffff888018167570 [ 38.913223] which belongs to the cache vm_area_struct of size 168 [ 38.914768] The buggy address is located 88 bytes inside of [ 38.914768] freed 168-byte region [ffff888018167570, ffff888018167618) [ 38.916270] [ 38.916491] The buggy address belongs to the physical page: [ 38.917177] page:00000000fac5ea13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18167 [ 38.918335] memcg:ffff8880199d2401 [ 38.918781] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.919454] page_type: 0xffffffff() [ 38.919924] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.920877] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199d2401 [ 38.921831] page dumped because: kasan: bad access detected [ 38.922538] [ 38.922757] Memory state around the buggy address: [ 38.923366] ffff888018167480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.924269] ffff888018167500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.925182] >ffff888018167580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.926085] ^ [ 38.926793] ffff888018167600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.927708] ffff888018167680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.928604] ================================================================== [ 38.929550] Disabling lock debugging due to kernel taint [ 41.725601] BUG: Bad rss-counter state mm:00000000aa9f6b4a type:MM_FILEPAGES val:33 [ 41.726624] BUG: Bad rss-counter state mm:00000000aa9f6b4a type:MM_ANONPAGES val:22 [ 42.184374] BUG: Bad rss-counter state mm:0000000066f384e4 type:MM_FILEPAGES val:33 [ 42.185354] BUG: Bad rss-counter state mm:0000000066f384e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1119' (ECDSA) to the list of known hosts. 2023/06/21 01:54:01 fuzzer started 2023/06/21 01:54:01 dialing manager at localhost:36067 2023/06/21 01:54:01 checking machine... 2023/06/21 01:54:01 checking revisions... [ 42.919852] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:54:01 testing simple program... [ 42.973924] cgroup: Unknown subsys name 'net' [ 43.017222] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:54:01 Registers: info registers vcpu 0 RAX=ffff88800e310e80 RBX=ffff888008d9fdc8 RCX=1ffff11001c621d0 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff888008d9fdd8 RBP=0000000000000007 RSP=ffff888008d9fd30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008d9fdc8 R14=ffff88806ce35000 R15=ffff88800d93b1b0 RIP=ffffffff8137fcd4 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 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=00007f8b4eecf650 CR3=000000000cbb4000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=0000000000000000000000000000ff00 XMM02=ffffffffffffff00ffff000000000000 XMM03=350909534549525445525f4e49474f4c XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=000000ffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001b33ec4 RSI=ffffffff81935bea RDI=ffff88800d99f620 RBP=ffff88800d99f6b8 RSP=ffff88800d99f5f8 R8 =0000000000000001 R9 =ffff88800d99f660 R10=0000000000038001 R11=000000000002c9f1 R12=ffff88800d99f6e8 R13=0000000000000000 R14=ffff8880147c8000 R15=ffff88800d99f620 RIP=ffffffff811305f0 RFL=00000212 [----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 00007feb7780b900 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=00007feb76c7d5a0 CR3=000000000f4ac000 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=95961cea40ea7c9000000000000ae988 XMM05=fa980ed7975a2d7b0000000000132900 XMM06=bdf2e299e47b49d50000000000131380 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000