syzkaller login: [ 31.236164] BUG: Bad rss-counter state mm:00000000efeaff9b type:MM_FILEPAGES val:33 [ 31.237402] BUG: Bad rss-counter state mm:00000000efeaff9b type:MM_ANONPAGES val:22 [ 31.386864] ================================================================== [ 31.387824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.388816] Read of size 8 at addr ffff888019236140 by task sshd/220 [ 31.389618] [ 31.389863] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.390947] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.391944] Call Trace: [ 31.392273] [ 31.392586] dump_stack_lvl+0x91/0xf0 [ 31.393128] print_report+0xcc/0x620 [ 31.393649] ? __virt_addr_valid+0x102/0x340 [ 31.394210] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.394863] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.395493] kasan_report+0xbe/0xf0 [ 31.396005] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.396643] vma_interval_tree_remove+0xc75/0xec0 [ 31.397259] vma_prepare+0xc54/0x11a0 [ 31.397767] __split_vma+0x5af/0x950 [ 31.398255] ? __pfx___split_vma+0x10/0x10 [ 31.398806] ? find_held_lock+0x2c/0x110 [ 31.399328] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.399936] ? lock_is_held_type+0x9f/0x120 [ 31.400490] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.401118] ? mtree_range_walk+0x632/0x900 [ 31.401724] ? mas_walk+0x5c7/0x7c0 [ 31.402210] do_vmi_munmap+0x1f1/0x2b0 [ 31.402732] mmap_region+0x1f9/0x2660 [ 31.403230] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.403779] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.404520] ? __pfx_lock_acquire+0x10/0x10 [ 31.405080] ? __pfx_mmap_region+0x10/0x10 [ 31.405658] ? security_mmap_addr+0x7d/0xa0 [ 31.406216] ? get_unmapped_area+0x1f5/0x3f0 [ 31.406791] do_mmap+0x854/0xf00 [ 31.407244] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.407765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.408337] ksys_mmap_pgoff+0x3af/0x500 [ 31.408898] do_syscall_64+0x3f/0x90 [ 31.409417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410096] RIP: 0033:0x7f0363514d82 [ 31.410568] 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 [ 31.412798] RSP: 002b:00007ffcf71a4bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.413787] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0363514d82 [ 31.414649] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f036294e000 [ 31.415520] RBP: 00007f036294e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.416399] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f10bd3dec0 [ 31.417310] R13: 00007ffcf71a4bd0 R14: 00007ffcf71a4c00 R15: 00007ffcf71a4f60 [ 31.418230] [ 31.418537] [ 31.418778] Allocated by task 213: [ 31.419226] kasan_save_stack+0x22/0x50 [ 31.419760] kasan_set_track+0x25/0x30 [ 31.420274] __kasan_slab_alloc+0x59/0x70 [ 31.420820] kmem_cache_alloc+0x16b/0x370 [ 31.421381] vm_area_dup+0x20/0x160 [ 31.421888] __split_vma+0x170/0x950 [ 31.422374] split_vma+0xc6/0x110 [ 31.422838] mprotect_fixup+0x8d2/0xb30 [ 31.423361] do_mprotect_pkey+0x87e/0xd40 [ 31.423923] __x64_sys_mprotect+0x78/0xc0 [ 31.424467] do_syscall_64+0x3f/0x90 [ 31.424978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.425670] [ 31.425905] Freed by task 203: [ 31.426321] kasan_save_stack+0x22/0x50 [ 31.426876] kasan_set_track+0x25/0x30 [ 31.427381] kasan_save_free_info+0x2b/0x50 [ 31.427934] __kasan_slab_free+0x10a/0x190 [ 31.428567] kmem_cache_free+0x10d/0x4d0 [ 31.429246] rcu_core+0x8c8/0x2860 [ 31.429759] __do_softirq+0x1b7/0x7d4 [ 31.430253] [ 31.430481] Last potentially related work creation: [ 31.431118] kasan_save_stack+0x22/0x50 [ 31.431731] __kasan_record_aux_stack+0x8e/0xa0 [ 31.432330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.433011] remove_vma+0x139/0x170 [ 31.433492] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.434091] do_vmi_munmap+0x1f1/0x2b0 [ 31.434584] __vm_munmap+0x138/0x3a0 [ 31.435099] __x64_sys_munmap+0x59/0x80 [ 31.435606] do_syscall_64+0x3f/0x90 [ 31.436110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.436804] [ 31.437033] The buggy address belongs to the object at ffff8880192360e8 [ 31.437033] which belongs to the cache vm_area_struct of size 168 [ 31.438615] The buggy address is located 88 bytes inside of [ 31.438615] freed 168-byte region [ffff8880192360e8, ffff888019236190) [ 31.440096] [ 31.440327] The buggy address belongs to the physical page: [ 31.441023] page:0000000022e20002 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19236 [ 31.442186] memcg:ffff888018106801 [ 31.442637] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.443313] page_type: 0xffffffff() [ 31.443834] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.444833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018106801 [ 31.445786] page dumped because: kasan: bad access detected [ 31.446463] [ 31.446703] Memory state around the buggy address: [ 31.447293] ffff888019236000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.448174] ffff888019236080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.449088] >ffff888019236100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.450013] ^ [ 31.450698] ffff888019236180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.451569] ffff888019236200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.452450] ================================================================== [ 31.453507] Disabling lock debugging due to kernel taint [ 33.206545] BUG: Bad rss-counter state mm:00000000e0d6c6e7 type:MM_FILEPAGES val:33 [ 33.207283] BUG: Bad rss-counter state mm:00000000e0d6c6e7 type:MM_ANONPAGES val:22 [ 33.750254] BUG: Bad rss-counter state mm:00000000e6994fcb type:MM_FILEPAGES val:33 [ 33.751450] BUG: Bad rss-counter state mm:00000000e6994fcb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12747' (ECDSA) to the list of known hosts. 2023/06/20 12:06:30 fuzzer started 2023/06/20 12:06:30 dialing manager at localhost:36067 2023/06/20 12:06:30 checking machine... 2023/06/20 12:06:30 checking revisions... [ 34.550035] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:06:30 testing simple program... [ 34.602050] cgroup: Unknown subsys name 'net' [ 34.643203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:06:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000255 RCX=ffffffff815343f6 RDX=0000000000000001 RSI=0000000000000014 RDI=ffff88800fc52000 RBP=ffff88800fc52000 RSP=ffff8880167afe70 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=00007fe03233c020 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff81831083 RFL=00000002 [-------] 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 00007fe03235d900 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=00007fe03233c020 CR3=000000000f2f2000 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=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=ffffffff815ab150 RBX=ffff88800ca87400 RCX=0000000000000000 RDX=ffff88800eb1d1c0 RSI=ffffc9000068d048 RDI=ffff8880147d7e30 RBP=0000000000000100 RSP=ffff8880147d7de0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff8880147d7e30 R15=ffffc9000068d000 RIP=ffffffff815ab154 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 00007f3e2d39d900 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=00007fe0321e4000 CR3=000000000c7fa000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8cc81c7e8cd7bf3600000000000ae988 XMM05=1319e678c5640f8a0000000000132580 XMM06=94aac670ef06ff6500000000001324e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000