syzkaller login: [ 42.834089] BUG: Bad rss-counter state mm:000000004eef5920 type:MM_FILEPAGES val:33 [ 42.835487] BUG: Bad rss-counter state mm:000000004eef5920 type:MM_ANONPAGES val:22 [ 42.976518] ================================================================== [ 42.977448] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.978396] Read of size 8 at addr ffff88800f13f968 by task sshd/219 [ 42.979195] [ 42.979557] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.980465] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.981458] Call Trace: [ 42.981916] [ 42.982266] dump_stack_lvl+0x91/0xf0 [ 42.982869] print_report+0xcc/0x620 [ 42.983434] ? __virt_addr_valid+0x102/0x340 [ 42.984086] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.984814] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.985546] kasan_report+0xbe/0xf0 [ 42.986111] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.986854] vma_interval_tree_remove+0xc75/0xec0 [ 42.987562] vma_prepare+0xc54/0x11a0 [ 42.988126] __split_vma+0x5af/0x950 [ 42.988688] ? __pfx___split_vma+0x10/0x10 [ 42.989311] ? find_held_lock+0x2c/0x110 [ 42.989929] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.990629] ? lock_is_held_type+0x9f/0x120 [ 42.991231] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.991840] ? mtree_range_walk+0x632/0x900 [ 42.992391] ? mas_walk+0x5c7/0x7c0 [ 42.992871] do_vmi_munmap+0x1f1/0x2b0 [ 42.993373] mmap_region+0x1f9/0x2660 [ 42.993851] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.994363] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.995091] ? __pfx_lock_acquire+0x10/0x10 [ 42.995630] ? __pfx_mmap_region+0x10/0x10 [ 42.996159] ? security_mmap_addr+0x7d/0xa0 [ 42.996691] ? get_unmapped_area+0x1f5/0x3f0 [ 42.997242] do_mmap+0x854/0xf00 [ 42.997690] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.998190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.998776] ksys_mmap_pgoff+0x3af/0x500 [ 42.999283] do_syscall_64+0x3f/0x90 [ 42.999763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.000405] RIP: 0033:0x7f3efbdb3d82 [ 43.000869] 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 [ 43.003031] RSP: 002b:00007ffc48b93b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.003944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3efbdb3d82 [ 43.004792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3efb1ed000 [ 43.005642] RBP: 00007f3efb1ed000 R08: 0000000000000009 R09: 0000000000001000 [ 43.006497] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557140fa8b20 [ 43.007358] R13: 00007ffc48b93b50 R14: 00007ffc48b93b80 R15: 00007ffc48b93ee0 [ 43.008223] [ 43.008517] [ 43.008734] Allocated by task 212: [ 43.009163] kasan_save_stack+0x22/0x50 [ 43.009669] kasan_set_track+0x25/0x30 [ 43.010169] __kasan_slab_alloc+0x59/0x70 [ 43.010705] kmem_cache_alloc+0x16b/0x370 [ 43.011229] vm_area_dup+0x20/0x160 [ 43.011699] __split_vma+0x170/0x950 [ 43.012164] split_vma+0xc6/0x110 [ 43.012632] mprotect_fixup+0x8d2/0xb30 [ 43.013145] do_mprotect_pkey+0x87e/0xd40 [ 43.013682] __x64_sys_mprotect+0x78/0xc0 [ 43.014219] do_syscall_64+0x3f/0x90 [ 43.014710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.015346] [ 43.015572] Freed by task 212: [ 43.015964] kasan_save_stack+0x22/0x50 [ 43.016473] kasan_set_track+0x25/0x30 [ 43.016971] kasan_save_free_info+0x2b/0x50 [ 43.017504] __kasan_slab_free+0x10a/0x190 [ 43.018041] kmem_cache_free+0x10d/0x4d0 [ 43.018576] rcu_core+0x8c8/0x2860 [ 43.019027] __do_softirq+0x1b7/0x7d4 [ 43.019506] [ 43.019729] Last potentially related work creation: [ 43.020440] kasan_save_stack+0x22/0x50 [ 43.020943] __kasan_record_aux_stack+0x8e/0xa0 [ 43.021523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.022169] remove_vma+0x139/0x170 [ 43.022636] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.023210] do_vmi_munmap+0x1f1/0x2b0 [ 43.023701] __vm_munmap+0x138/0x3a0 [ 43.024174] __x64_sys_munmap+0x59/0x80 [ 43.024667] do_syscall_64+0x3f/0x90 [ 43.025145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.025779] [ 43.025997] The buggy address belongs to the object at ffff88800f13f910 [ 43.025997] which belongs to the cache vm_area_struct of size 168 [ 43.027474] The buggy address is located 88 bytes inside of [ 43.027474] freed 168-byte region [ffff88800f13f910, ffff88800f13f9b8) [ 43.028857] [ 43.029071] The buggy address belongs to the physical page: [ 43.029724] page:000000004d8c68f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf13f [ 43.030822] memcg:ffff888013b24901 [ 43.031245] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.031941] page_type: 0xffffffff() [ 43.032409] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 43.033356] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013b24901 [ 43.034277] page dumped because: kasan: bad access detected [ 43.034956] [ 43.035175] Memory state around the buggy address: [ 43.035763] ffff88800f13f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.036645] ffff88800f13f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.037509] >ffff88800f13f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.038374] ^ [ 43.039175] ffff88800f13f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 43.040042] ffff88800f13fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.040896] ================================================================== [ 43.042004] Disabling lock debugging due to kernel taint [ 45.697903] BUG: Bad rss-counter state mm:00000000747270c9 type:MM_FILEPAGES val:33 [ 45.699053] BUG: Bad rss-counter state mm:00000000747270c9 type:MM_ANONPAGES val:22 [ 46.089869] BUG: Bad rss-counter state mm:00000000c3eef198 type:MM_FILEPAGES val:33 [ 46.091106] BUG: Bad rss-counter state mm:00000000c3eef198 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43552' (ECDSA) to the list of known hosts. 2023/06/19 17:09:12 fuzzer started 2023/06/19 17:09:13 dialing manager at localhost:44161 2023/06/19 17:09:13 checking machine... 2023/06/19 17:09:13 checking revisions... [ 46.845685] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:09:13 testing simple program... [ 46.894700] cgroup: Unknown subsys name 'net' [ 46.935813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:09:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83c632d1 RDX=ffff88800b981b40 RSI=000000000000007d RDI=00000000000000ff RBP=0000000000000000 RSP=ffff88800da876a0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000007c R11=00000b1a00000b1a R12=0000000000000000 R13=000000000000007d R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c0388 RFL=00000206 [-----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 00007f327e2cd900 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=00007f327e884618 CR3=000000000c66a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f53821b1d60 CR3=0000000013ad8000 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=3dd0b49afb045383734b2db688806599 XMM02=ec2efd57dc4c00df000000000011db10 XMM03=936c515d4b106c95000000000011dbe0 XMM04=c2b837d79d35e48b00000000000ae988 XMM05=dfcdbad4f1609c370000000000133e70 XMM06=806171799158d9670000000000133cf8 XMM07=e042d86d42eb936e00000000001247f8 XMM08=936c515d4b106c95000000000011dbe0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000