syzkaller login: [ 41.627759] BUG: Bad rss-counter state mm:0000000054f91bf1 type:MM_FILEPAGES val:33 [ 41.628965] BUG: Bad rss-counter state mm:0000000054f91bf1 type:MM_ANONPAGES val:22 [ 41.664887] ================================================================== [ 41.665932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.667046] Read of size 8 at addr ffff88800e60edf0 by task sshd/219 [ 41.667849] [ 41.668077] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.668987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.670129] Call Trace: [ 41.670465] [ 41.670831] dump_stack_lvl+0x91/0xf0 [ 41.671459] print_report+0xcc/0x620 [ 41.671975] ? __virt_addr_valid+0x102/0x340 [ 41.672635] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.673382] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.674148] kasan_report+0xbe/0xf0 [ 41.674650] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.675306] vma_interval_tree_remove+0xc75/0xec0 [ 41.675947] vma_prepare+0xc54/0x11a0 [ 41.676632] __split_vma+0x5af/0x950 [ 41.677157] ? __pfx___split_vma+0x10/0x10 [ 41.677733] ? find_held_lock+0x2c/0x110 [ 41.678296] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.678915] ? lock_is_held_type+0x9f/0x120 [ 41.679496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.680143] ? mtree_range_walk+0x632/0x900 [ 41.680734] ? mas_walk+0x5c7/0x7c0 [ 41.681250] do_vmi_munmap+0x1f1/0x2b0 [ 41.681777] mmap_region+0x1f9/0x2660 [ 41.682298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.682845] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.683609] ? __pfx_lock_acquire+0x10/0x10 [ 41.684176] ? __pfx_mmap_region+0x10/0x10 [ 41.684743] ? security_mmap_addr+0x7d/0xa0 [ 41.685332] ? get_unmapped_area+0x1f5/0x3f0 [ 41.685922] do_mmap+0x854/0xf00 [ 41.686400] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.686928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.687528] ksys_mmap_pgoff+0x3af/0x500 [ 41.688069] do_syscall_64+0x3f/0x90 [ 41.688581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.689281] RIP: 0033:0x7f4ea5cb4d82 [ 41.689774] 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 [ 41.692043] RSP: 002b:00007ffe3fe61f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.693019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ea5cb4d82 [ 41.693925] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4ea50ee000 [ 41.694830] RBP: 00007f4ea50ee000 R08: 0000000000000009 R09: 0000000000001000 [ 41.695731] R10: 0000000000000812 R11: 0000000000000206 R12: 000055746adbaf70 [ 41.696631] R13: 00007ffe3fe61fa0 R14: 00007ffe3fe61fd0 R15: 00007ffe3fe62330 [ 41.697556] [ 41.697868] [ 41.698099] Allocated by task 212: [ 41.698558] kasan_save_stack+0x22/0x50 [ 41.699094] kasan_set_track+0x25/0x30 [ 41.699610] __kasan_slab_alloc+0x59/0x70 [ 41.700157] kmem_cache_alloc+0x16b/0x370 [ 41.700697] vm_area_dup+0x20/0x160 [ 41.701221] __split_vma+0x170/0x950 [ 41.701718] split_vma+0xc6/0x110 [ 41.702182] mprotect_fixup+0x8d2/0xb30 [ 41.702715] do_mprotect_pkey+0x87e/0xd40 [ 41.703260] __x64_sys_mprotect+0x78/0xc0 [ 41.703809] do_syscall_64+0x3f/0x90 [ 41.704307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.704983] [ 41.705209] Freed by task 212: [ 41.705619] kasan_save_stack+0x22/0x50 [ 41.706148] kasan_set_track+0x25/0x30 [ 41.706667] kasan_save_free_info+0x2b/0x50 [ 41.707228] __kasan_slab_free+0x10a/0x190 [ 41.707788] kmem_cache_free+0x10d/0x4d0 [ 41.708319] rcu_core+0x8c8/0x2860 [ 41.708786] __do_softirq+0x1b7/0x7d4 [ 41.709299] [ 41.709525] Last potentially related work creation: [ 41.710142] kasan_save_stack+0x22/0x50 [ 41.710677] __kasan_record_aux_stack+0x8e/0xa0 [ 41.711282] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.711963] remove_vma+0x139/0x170 [ 41.712439] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.713034] do_vmi_munmap+0x1f1/0x2b0 [ 41.713545] __vm_munmap+0x138/0x3a0 [ 41.714043] __x64_sys_munmap+0x59/0x80 [ 41.714569] do_syscall_64+0x3f/0x90 [ 41.715069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.715743] [ 41.715976] The buggy address belongs to the object at ffff88800e60ed98 [ 41.715976] which belongs to the cache vm_area_struct of size 168 [ 41.717532] The buggy address is located 88 bytes inside of [ 41.717532] freed 168-byte region [ffff88800e60ed98, ffff88800e60ee40) [ 41.719015] [ 41.719241] The buggy address belongs to the physical page: [ 41.719932] page:000000008adf16f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe60e [ 41.721092] memcg:ffff88800f2d4c01 [ 41.721542] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.722217] page_type: 0xffffffff() [ 41.722693] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.723659] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2d4c01 [ 41.724609] page dumped because: kasan: bad access detected [ 41.725309] [ 41.725534] Memory state around the buggy address: [ 41.726144] ffff88800e60ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 41.727046] ffff88800e60ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 41.727948] >ffff88800e60ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.728847] ^ [ 41.729715] ffff88800e60ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.730612] ffff88800e60ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.731510] ================================================================== [ 41.732782] Disabling lock debugging due to kernel taint [ 44.688593] BUG: Bad rss-counter state mm:00000000beafa46a type:MM_FILEPAGES val:33 [ 44.689668] BUG: Bad rss-counter state mm:00000000beafa46a type:MM_ANONPAGES val:22 [ 45.168545] BUG: Bad rss-counter state mm:0000000020cf9640 type:MM_FILEPAGES val:33 [ 45.169115] BUG: Bad rss-counter state mm:0000000020cf9640 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30805' (ECDSA) to the list of known hosts. 2023/06/20 10:37:58 fuzzer started 2023/06/20 10:37:59 dialing manager at localhost:44161 2023/06/20 10:37:59 checking machine... 2023/06/20 10:37:59 checking revisions... [ 45.810101] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:37:59 testing simple program... [ 45.855932] cgroup: Unknown subsys name 'net' [ 45.893744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:37:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018ebf8d8 RCX=ffffffff860d6801 RDX=1ffff110031d7f1d RSI=ffffffff81846014 RDI=ffff888018ebf8e8 RBP=ffff888018ebf8a8 RSP=ffff888018ebf7f0 R8 =ffffffff860d68fa R9 =ffff888018ebf850 R10=0000000000038001 R11=0000000000010b7e R12=ffff888018ebf8d8 R13=0000000000000000 R14=ffff888014723680 R15=ffff888009380e40 RIP=ffffffff813ad446 RFL=00000286 [--S--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 00007ff741945900 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=00007ffeff26f000 CR3=000000000f002000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007fc549b27610 CR3=000000000d58c000 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=bdf45407b60acf80144e3972c807ce0b XMM02=ec2efd57dc4c00df000000000011d318 XMM03=cf5162cf7d436133000000000011d3e8 XMM04=6a18d5438e6988a300000000000ae988 XMM05=dfcdbad4f1609c370000000000133608 XMM06=e10fb06709e1dae800000000001327e0 XMM07=e042d86d42eb936e0000000000123fa8 XMM08=cf5162cf7d436133000000000011d3e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000