syzkaller login: [ 32.239952] BUG: Bad rss-counter state mm:00000000b45d7fc6 type:MM_FILEPAGES val:33 [ 32.241190] BUG: Bad rss-counter state mm:00000000b45d7fc6 type:MM_ANONPAGES val:22 [ 32.418806] ================================================================== [ 32.419783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.420821] Read of size 8 at addr ffff88801a345058 by task sshd/220 [ 32.421764] [ 32.422017] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.422941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.424088] Call Trace: [ 32.424432] [ 32.424737] dump_stack_lvl+0x91/0xf0 [ 32.425262] print_report+0xcc/0x620 [ 32.425787] ? __virt_addr_valid+0x102/0x340 [ 32.426384] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.427051] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.427714] kasan_report+0xbe/0xf0 [ 32.428275] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.428960] vma_interval_tree_remove+0xc75/0xec0 [ 32.429642] vma_prepare+0xc54/0x11a0 [ 32.430175] __split_vma+0x5af/0x950 [ 32.430696] ? __pfx___split_vma+0x10/0x10 [ 32.431281] ? find_held_lock+0x2c/0x110 [ 32.431897] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.432531] ? lock_is_held_type+0x9f/0x120 [ 32.433133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.433825] ? mtree_range_walk+0x632/0x900 [ 32.434437] ? mas_walk+0x5c7/0x7c0 [ 32.434965] do_vmi_munmap+0x1f1/0x2b0 [ 32.435507] mmap_region+0x1f9/0x2660 [ 32.436071] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.436643] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.437475] ? __pfx_lock_acquire+0x10/0x10 [ 32.438068] ? __pfx_mmap_region+0x10/0x10 [ 32.438646] ? security_mmap_addr+0x7d/0xa0 [ 32.439226] ? get_unmapped_area+0x1f5/0x3f0 [ 32.439862] do_mmap+0x854/0xf00 [ 32.440354] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.440882] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.441500] ksys_mmap_pgoff+0x3af/0x500 [ 32.442048] do_syscall_64+0x3f/0x90 [ 32.442566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.443259] RIP: 0033:0x7f2846e2ed82 [ 32.443755] 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 [ 32.446129] RSP: 002b:00007ffddadbc648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.447131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2846e2ed82 [ 32.448108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2846268000 [ 32.449051] RBP: 00007f2846268000 R08: 0000000000000009 R09: 0000000000001000 [ 32.450014] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562079280ec0 [ 32.450955] R13: 00007ffddadbc660 R14: 00007ffddadbc690 R15: 00007ffddadbc9f0 [ 32.451943] [ 32.452269] [ 32.452503] Allocated by task 213: [ 32.453063] kasan_save_stack+0x22/0x50 [ 32.453755] kasan_set_track+0x25/0x30 [ 32.454315] __kasan_slab_alloc+0x59/0x70 [ 32.454891] kmem_cache_alloc+0x16b/0x370 [ 32.455462] vm_area_dup+0x20/0x160 [ 32.456075] __split_vma+0x170/0x950 [ 32.456741] split_vma+0xc6/0x110 [ 32.457248] mprotect_fixup+0x8d2/0xb30 [ 32.457883] do_mprotect_pkey+0x87e/0xd40 [ 32.458460] __x64_sys_mprotect+0x78/0xc0 [ 32.459046] do_syscall_64+0x3f/0x90 [ 32.459567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.460315] [ 32.460545] Freed by task 213: [ 32.461037] kasan_save_stack+0x22/0x50 [ 32.461615] kasan_set_track+0x25/0x30 [ 32.462177] kasan_save_free_info+0x2b/0x50 [ 32.462769] __kasan_slab_free+0x10a/0x190 [ 32.463403] kmem_cache_free+0x10d/0x4d0 [ 32.464052] rcu_core+0x8c8/0x2860 [ 32.464537] __do_softirq+0x1b7/0x7d4 [ 32.465093] [ 32.465350] Last potentially related work creation: [ 32.466040] kasan_save_stack+0x22/0x50 [ 32.466604] __kasan_record_aux_stack+0x8e/0xa0 [ 32.467226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.468002] remove_vma+0x139/0x170 [ 32.468484] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.469124] do_vmi_munmap+0x1f1/0x2b0 [ 32.469796] __vm_munmap+0x138/0x3a0 [ 32.470303] __x64_sys_munmap+0x59/0x80 [ 32.470939] do_syscall_64+0x3f/0x90 [ 32.471623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.472462] [ 32.472749] The buggy address belongs to the object at ffff88801a345000 [ 32.472749] which belongs to the cache vm_area_struct of size 168 [ 32.474875] The buggy address is located 88 bytes inside of [ 32.474875] freed 168-byte region [ffff88801a345000, ffff88801a3450a8) [ 32.476885] [ 32.477194] The buggy address belongs to the physical page: [ 32.478151] page:0000000013334f76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a345 [ 32.479730] memcg:ffff88800eb03001 [ 32.480362] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.481307] page_type: 0xffffffff() [ 32.482008] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.483373] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb03001 [ 32.484680] page dumped because: kasan: bad access detected [ 32.485657] [ 32.485982] Memory state around the buggy address: [ 32.486788] ffff88801a344f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.487939] ffff88801a344f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.489151] >ffff88801a345000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.490147] ^ [ 32.490940] ffff88801a345080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.491884] ffff88801a345100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.492828] ================================================================== [ 32.493986] Disabling lock debugging due to kernel taint [ 35.080616] BUG: Bad rss-counter state mm:000000008a3cc7eb type:MM_FILEPAGES val:33 [ 35.082399] BUG: Bad rss-counter state mm:000000008a3cc7eb type:MM_ANONPAGES val:22 [ 35.572229] BUG: Bad rss-counter state mm:00000000eed7dd7a type:MM_FILEPAGES val:33 [ 35.573280] BUG: Bad rss-counter state mm:00000000eed7dd7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34207' (ECDSA) to the list of known hosts. 2023/06/20 10:03:26 fuzzer started 2023/06/20 10:03:26 dialing manager at localhost:44161 2023/06/20 10:03:26 checking machine... 2023/06/20 10:03:26 checking revisions... [ 36.330415] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:03:26 testing simple program... [ 36.387476] cgroup: Unknown subsys name 'net' [ 36.439393] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:03:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007efc1857d190 CR3=00000000102ca000 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=05f6eee7539513b5e54a7c62a83e5119 XMM02=000000000011c368d59e07bde36eea69 XMM03=000000000011c490ec2efd57dc4c00df XMM04=a52a82039e93693500000000000ae988 XMM05=77dc217b09965c8f00000000001345d0 XMM06=4fda316b135da52b00000000001333c0 XMM07=fb795ef6d657705600000000001239d0 XMM08=2c67c8bc2e329bc3000000000011c490 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83639306 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002d22e96 RSI=ffffffff83639306 RDI=ffff888016917520 RBP=ffff8880169174f0 RSP=ffff888016917450 R8 =0000000000000001 R9 =ffff888016917498 R10=0000000000038001 R11=0000000000091be7 R12=ffff888016917520 R13=0000000000000000 R14=ffff888018fcd1c0 R15=0000000000082cc0 RIP=ffffffff813ad420 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 00007f4fe2b5b900 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=00007ffcd9eb4000 CR3=000000000e7c0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000