syzkaller login: [ 41.845208] BUG: Bad rss-counter state mm:000000008388829d type:MM_FILEPAGES val:33 [ 41.846365] BUG: Bad rss-counter state mm:000000008388829d type:MM_ANONPAGES val:22 [ 41.883661] ================================================================== [ 41.884651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.885694] Read of size 8 at addr ffff8880168966b0 by task sshd/220 [ 41.886513] [ 41.886790] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.887726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.888812] Call Trace: [ 41.889139] [ 41.889477] dump_stack_lvl+0x91/0xf0 [ 41.889980] print_report+0xcc/0x620 [ 41.890476] ? __virt_addr_valid+0x102/0x340 [ 41.891044] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.891784] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.892402] kasan_report+0xbe/0xf0 [ 41.892873] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.893507] vma_interval_tree_remove+0xc75/0xec0 [ 41.894107] vma_prepare+0xc54/0x11a0 [ 41.894588] __split_vma+0x5af/0x950 [ 41.895069] ? __pfx___split_vma+0x10/0x10 [ 41.895598] ? find_held_lock+0x2c/0x110 [ 41.896117] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.896672] ? lock_is_held_type+0x9f/0x120 [ 41.897206] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.897803] ? mtree_range_walk+0x632/0x900 [ 41.898349] ? mas_walk+0x5c7/0x7c0 [ 41.898837] do_vmi_munmap+0x1f1/0x2b0 [ 41.899330] mmap_region+0x1f9/0x2660 [ 41.899811] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.900320] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.901039] ? __pfx_lock_acquire+0x10/0x10 [ 41.901567] ? __pfx_mmap_region+0x10/0x10 [ 41.902098] ? security_mmap_addr+0x7d/0xa0 [ 41.902623] ? get_unmapped_area+0x1f5/0x3f0 [ 41.903181] do_mmap+0x854/0xf00 [ 41.903616] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.904106] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.904665] ksys_mmap_pgoff+0x3af/0x500 [ 41.905169] do_syscall_64+0x3f/0x90 [ 41.905646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.906284] RIP: 0033:0x7fb80ce86d82 [ 41.906753] 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 [ 41.908867] RSP: 002b:00007ffd59154f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.909772] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb80ce86d82 [ 41.910616] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb80c2c0000 [ 41.911457] RBP: 00007fb80c2c0000 R08: 0000000000000009 R09: 0000000000001000 [ 41.912303] R10: 0000000000000812 R11: 0000000000000206 R12: 000056284f5fcec0 [ 41.913150] R13: 00007ffd59154f70 R14: 00007ffd59154fa0 R15: 00007ffd59155300 [ 41.914004] [ 41.914296] [ 41.914510] Allocated by task 213: [ 41.914952] kasan_save_stack+0x22/0x50 [ 41.915457] kasan_set_track+0x25/0x30 [ 41.915954] __kasan_slab_alloc+0x59/0x70 [ 41.916475] kmem_cache_alloc+0x16b/0x370 [ 41.916993] vm_area_dup+0x20/0x160 [ 41.917455] __split_vma+0x170/0x950 [ 41.917923] split_vma+0xc6/0x110 [ 41.918363] mprotect_fixup+0x8d2/0xb30 [ 41.918887] do_mprotect_pkey+0x87e/0xd40 [ 41.919412] __x64_sys_mprotect+0x78/0xc0 [ 41.919930] do_syscall_64+0x3f/0x90 [ 41.920401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.921046] [ 41.921257] Freed by task 213: [ 41.921651] kasan_save_stack+0x22/0x50 [ 41.922158] kasan_set_track+0x25/0x30 [ 41.922646] kasan_save_free_info+0x2b/0x50 [ 41.923185] __kasan_slab_free+0x10a/0x190 [ 41.923712] kmem_cache_free+0x10d/0x4d0 [ 41.924221] rcu_core+0x8c8/0x2860 [ 41.924668] __do_softirq+0x1b7/0x7d4 [ 41.925145] [ 41.925358] Last potentially related work creation: [ 41.925946] kasan_save_stack+0x22/0x50 [ 41.926451] __kasan_record_aux_stack+0x8e/0xa0 [ 41.927038] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.927678] remove_vma+0x139/0x170 [ 41.928128] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.928725] do_vmi_munmap+0x1f1/0x2b0 [ 41.929211] __vm_munmap+0x138/0x3a0 [ 41.929678] __x64_sys_munmap+0x59/0x80 [ 41.930171] do_syscall_64+0x3f/0x90 [ 41.930652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.931304] [ 41.931517] The buggy address belongs to the object at ffff888016896658 [ 41.931517] which belongs to the cache vm_area_struct of size 168 [ 41.932990] The buggy address is located 88 bytes inside of [ 41.932990] freed 168-byte region [ffff888016896658, ffff888016896700) [ 41.934398] [ 41.934612] The buggy address belongs to the physical page: [ 41.935281] page:00000000d3d15361 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16896 [ 41.936367] memcg:ffff88801025a701 [ 41.936793] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.937489] page_type: 0xffffffff() [ 41.937942] raw: 0100000000000200 ffff88800879fc80 ffffea0000251e40 dead000000000005 [ 41.938878] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801025a701 [ 41.939785] page dumped because: kasan: bad access detected [ 41.940453] [ 41.940671] Memory state around the buggy address: [ 41.941256] ffff888016896580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.942113] ffff888016896600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 41.942991] >ffff888016896680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.943841] ^ [ 41.944432] ffff888016896700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 41.945282] ffff888016896780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 41.946136] ================================================================== [ 41.947172] Disabling lock debugging due to kernel taint [ 44.158199] BUG: Bad rss-counter state mm:00000000d8140e19 type:MM_FILEPAGES val:33 [ 44.159309] BUG: Bad rss-counter state mm:00000000d8140e19 type:MM_ANONPAGES val:22 [ 44.718383] BUG: Bad rss-counter state mm:000000009db91b81 type:MM_FILEPAGES val:33 [ 44.719723] BUG: Bad rss-counter state mm:000000009db91b81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3616' (ECDSA) to the list of known hosts. 2023/06/19 19:55:00 fuzzer started 2023/06/19 19:55:00 dialing manager at localhost:44161 2023/06/19 19:55:00 checking machine... 2023/06/19 19:55:00 checking revisions... [ 45.399018] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:55:00 testing simple program... [ 45.448860] cgroup: Unknown subsys name 'net' [ 45.500776] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:54:49 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff83698eca RDX=ffff888016ba0000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019849500 RSP=ffff88800ed3f988 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=00000000000000e8 R13=0000000000000000 R14=ffff88800ed3fe70 R15=00000000000000e8 RIP=ffffffff814c01e1 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 00007f10015a5900 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=00007f1001b5c618 CR3=000000000cc4a000 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=00007fc62c32b6d0 CR3=000000000da0a000 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=a9c293bf47c89da37a4e3ec7d9666d98 XMM02=000000000011ed88eff9b2d0a8fce9cb XMM03=000000000011ee582c67c8bc2e329bc3 XMM04=84b583f916a5935900000000000ae988 XMM05=19e9129bd510f23500000000001348f0 XMM06=bc3b6ced46ec59b00000000000133ac8 XMM07=e042d86d42eb936e00000000001252a0 XMM08=6f901fb0c0424a19000000000011ee58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000