syzkaller login: [ 30.340114] BUG: Bad rss-counter state mm:0000000085b2967b type:MM_FILEPAGES val:33 [ 30.341543] BUG: Bad rss-counter state mm:0000000085b2967b type:MM_ANONPAGES val:22 [ 30.379728] ================================================================== [ 30.380811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.381977] Read of size 8 at addr ffff888019a54140 by task sshd/220 [ 30.382905] [ 30.383186] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.384141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.385323] Call Trace: [ 30.385674] [ 30.386008] dump_stack_lvl+0x91/0xf0 [ 30.386579] print_report+0xcc/0x620 [ 30.387150] ? __virt_addr_valid+0x102/0x340 [ 30.387750] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.388462] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.389040] kasan_report+0xbe/0xf0 [ 30.389560] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.390198] vma_interval_tree_remove+0xc75/0xec0 [ 30.390776] vma_prepare+0xc54/0x11a0 [ 30.391267] __split_vma+0x5af/0x950 [ 30.391749] ? __pfx___split_vma+0x10/0x10 [ 30.392285] ? find_held_lock+0x2c/0x110 [ 30.392804] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.393377] ? lock_is_held_type+0x9f/0x120 [ 30.393916] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.394507] ? mtree_range_walk+0x632/0x900 [ 30.395036] ? mas_walk+0x5c7/0x7c0 [ 30.395489] do_vmi_munmap+0x1f1/0x2b0 [ 30.395958] mmap_region+0x1f9/0x2660 [ 30.396416] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.396917] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.397641] ? __pfx_lock_acquire+0x10/0x10 [ 30.398160] ? __pfx_mmap_region+0x10/0x10 [ 30.398676] ? security_mmap_addr+0x7d/0xa0 [ 30.399191] ? get_unmapped_area+0x1f5/0x3f0 [ 30.399731] do_mmap+0x854/0xf00 [ 30.400166] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.400652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.401215] ksys_mmap_pgoff+0x3af/0x500 [ 30.401720] do_syscall_64+0x3f/0x90 [ 30.402196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.402829] RIP: 0033:0x7f455bbd0d82 [ 30.403282] 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 [ 30.405436] RSP: 002b:00007ffde1dafc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.406341] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f455bbd0d82 [ 30.407194] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f455b00a000 [ 30.408048] RBP: 00007f455b00a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.408886] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f7db1c4ec0 [ 30.409748] R13: 00007ffde1dafca0 R14: 00007ffde1dafcd0 R15: 00007ffde1db0030 [ 30.410592] [ 30.410888] [ 30.411104] Allocated by task 213: [ 30.411535] kasan_save_stack+0x22/0x50 [ 30.412048] kasan_set_track+0x25/0x30 [ 30.412538] __kasan_slab_alloc+0x59/0x70 [ 30.413058] kmem_cache_alloc+0x16b/0x370 [ 30.413586] vm_area_dup+0x20/0x160 [ 30.414045] __split_vma+0x170/0x950 [ 30.414558] split_vma+0xc6/0x110 [ 30.415004] mprotect_fixup+0x8d2/0xb30 [ 30.415512] do_mprotect_pkey+0x87e/0xd40 [ 30.416019] __x64_sys_mprotect+0x78/0xc0 [ 30.416523] do_syscall_64+0x3f/0x90 [ 30.417003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.417651] [ 30.417858] Freed by task 213: [ 30.418229] kasan_save_stack+0x22/0x50 [ 30.418724] kasan_set_track+0x25/0x30 [ 30.419189] kasan_save_free_info+0x2b/0x50 [ 30.419704] __kasan_slab_free+0x10a/0x190 [ 30.420211] kmem_cache_free+0x10d/0x4d0 [ 30.420694] rcu_core+0x8c8/0x2860 [ 30.421111] __do_softirq+0x1b7/0x7d4 [ 30.421576] [ 30.421795] Last potentially related work creation: [ 30.422385] kasan_save_stack+0x22/0x50 [ 30.422888] __kasan_record_aux_stack+0x8e/0xa0 [ 30.423456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.424122] remove_vma+0x139/0x170 [ 30.424566] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.425126] do_vmi_munmap+0x1f1/0x2b0 [ 30.425635] __vm_munmap+0x138/0x3a0 [ 30.426091] __x64_sys_munmap+0x59/0x80 [ 30.426584] do_syscall_64+0x3f/0x90 [ 30.427053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.427699] [ 30.427917] The buggy address belongs to the object at ffff888019a540e8 [ 30.427917] which belongs to the cache vm_area_struct of size 168 [ 30.429390] The buggy address is located 88 bytes inside of [ 30.429390] freed 168-byte region [ffff888019a540e8, ffff888019a54190) [ 30.430785] [ 30.431003] The buggy address belongs to the physical page: [ 30.431660] page:000000003f4591cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a54 [ 30.432760] memcg:ffff8880195b1c01 [ 30.433177] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.433825] page_type: 0xffffffff() [ 30.434272] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.435178] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880195b1c01 [ 30.436090] page dumped because: kasan: bad access detected [ 30.436760] [ 30.436968] Memory state around the buggy address: [ 30.437568] ffff888019a54000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.438428] ffff888019a54080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.439273] >ffff888019a54100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.440129] ^ [ 30.440763] ffff888019a54180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.441624] ffff888019a54200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.442468] ================================================================== [ 30.443655] Disabling lock debugging due to kernel taint [ 33.107232] BUG: Bad rss-counter state mm:00000000fb465b35 type:MM_FILEPAGES val:33 [ 33.108167] BUG: Bad rss-counter state mm:00000000fb465b35 type:MM_ANONPAGES val:22 [ 33.688221] BUG: Bad rss-counter state mm:00000000139c86f1 type:MM_FILEPAGES val:33 [ 33.689397] BUG: Bad rss-counter state mm:00000000139c86f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8562' (ECDSA) to the list of known hosts. 2023/06/20 21:04:31 fuzzer started 2023/06/20 21:04:31 dialing manager at localhost:36067 2023/06/20 21:04:32 checking machine... 2023/06/20 21:04:32 checking revisions... [ 34.374402] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:04:32 testing simple program... [ 34.432040] cgroup: Unknown subsys name 'net' [ 34.471403] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:04:31 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff864b3701 RDX=ffffffff85407e20 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffffffff85400000 RSP=ffff88806ce09a68 R8 =ffffffff864b37a6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b546d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407e18 R15=ffff88806ce09a98 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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=00007fa5e33cbc20 CR3=0000000009a14000 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=5930013d4d519397be4a00e048981b99 XMM02=000000000011b740eff9b2d0a8fce9cb XMM03=000000000011b8102c67c8bc2e329bc3 XMM04=2342bb5a7e126eac00000000000ae988 XMM05=19e9129bd510f2350000000000132468 XMM06=4fda316b135da52b00000000001322f0 XMM07=e042d86d42eb936e0000000000122810 XMM08=6b5f132e40c01e4d000000000011b810 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002b2f00f RBX=000000000000000f RCX=dffffc0000000000 RDX=dffffc0000000000 RSI=ffffffff844a5108 RDI=ffffffff84e3a5a1 RBP=ffff888015978008 RSP=ffff8880197a7ce8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=ffff888015978078 R13=000000000000000e R14=00007ffb37d77000 R15=00007ffb37da1fff RIP=ffffffff844a5169 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffb379dc900 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=00007ffb37d783ec CR3=000000000e75a000 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=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