syzkaller login: [ 31.105973] BUG: Bad rss-counter state mm:00000000f558f5fd type:MM_FILEPAGES val:33 [ 31.108004] BUG: Bad rss-counter state mm:00000000f558f5fd type:MM_ANONPAGES val:22 [ 31.269312] ================================================================== [ 31.270181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.271086] Read of size 8 at addr ffff888018014d08 by task sshd/220 [ 31.271835] [ 31.272044] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.272954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.273947] Call Trace: [ 31.274258] [ 31.274526] dump_stack_lvl+0x91/0xf0 [ 31.274987] print_report+0xcc/0x620 [ 31.275464] ? __virt_addr_valid+0x102/0x340 [ 31.275982] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.276557] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277185] kasan_report+0xbe/0xf0 [ 31.277637] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278222] vma_interval_tree_remove+0xc75/0xec0 [ 31.278791] vma_prepare+0xc54/0x11a0 [ 31.279257] __split_vma+0x5af/0x950 [ 31.279724] ? __pfx___split_vma+0x10/0x10 [ 31.280241] ? find_held_lock+0x2c/0x110 [ 31.280762] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.281320] ? lock_is_held_type+0x9f/0x120 [ 31.281838] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.282426] ? mtree_range_walk+0x632/0x900 [ 31.282952] ? mas_walk+0x5c7/0x7c0 [ 31.283421] do_vmi_munmap+0x1f1/0x2b0 [ 31.283895] mmap_region+0x1f9/0x2660 [ 31.284374] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.284883] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.285592] ? __pfx_lock_acquire+0x10/0x10 [ 31.286112] ? __pfx_mmap_region+0x10/0x10 [ 31.286632] ? security_mmap_addr+0x7d/0xa0 [ 31.287137] ? get_unmapped_area+0x1f5/0x3f0 [ 31.287679] do_mmap+0x854/0xf00 [ 31.288099] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.288580] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.289155] ksys_mmap_pgoff+0x3af/0x500 [ 31.289650] do_syscall_64+0x3f/0x90 [ 31.290113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290747] RIP: 0033:0x7fa4139e6d82 [ 31.291189] 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 [ 31.293243] RSP: 002b:00007fffae0d0778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.294119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4139e6d82 [ 31.294938] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa412e20000 [ 31.295758] RBP: 00007fa412e20000 R08: 0000000000000009 R09: 0000000000001000 [ 31.296573] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625a1515f60 [ 31.297405] R13: 00007fffae0d0790 R14: 00007fffae0d07c0 R15: 00007fffae0d0b20 [ 31.298246] [ 31.298541] [ 31.298748] Allocated by task 213: [ 31.299156] kasan_save_stack+0x22/0x50 [ 31.299646] kasan_set_track+0x25/0x30 [ 31.300125] __kasan_slab_alloc+0x59/0x70 [ 31.300634] kmem_cache_alloc+0x16b/0x370 [ 31.301146] vm_area_dup+0x20/0x160 [ 31.301596] __split_vma+0x170/0x950 [ 31.302040] split_vma+0xc6/0x110 [ 31.302472] mprotect_fixup+0x8d2/0xb30 [ 31.302953] do_mprotect_pkey+0x87e/0xd40 [ 31.303461] __x64_sys_mprotect+0x78/0xc0 [ 31.303974] do_syscall_64+0x3f/0x90 [ 31.304429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305072] [ 31.305284] Freed by task 213: [ 31.305664] kasan_save_stack+0x22/0x50 [ 31.306152] kasan_set_track+0x25/0x30 [ 31.306627] kasan_save_free_info+0x2b/0x50 [ 31.307140] __kasan_slab_free+0x10a/0x190 [ 31.307658] kmem_cache_free+0x10d/0x4d0 [ 31.308146] rcu_core+0x8c8/0x2860 [ 31.308585] __do_softirq+0x1b7/0x7d4 [ 31.309050] [ 31.309254] Last potentially related work creation: [ 31.309817] kasan_save_stack+0x22/0x50 [ 31.310300] __kasan_record_aux_stack+0x8e/0xa0 [ 31.310861] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.311487] remove_vma+0x139/0x170 [ 31.311920] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.312468] do_vmi_munmap+0x1f1/0x2b0 [ 31.312941] __vm_munmap+0x138/0x3a0 [ 31.313390] __x64_sys_munmap+0x59/0x80 [ 31.313876] do_syscall_64+0x3f/0x90 [ 31.314377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315005] [ 31.315225] The buggy address belongs to the object at ffff888018014cb0 [ 31.315225] which belongs to the cache vm_area_struct of size 168 [ 31.316648] The buggy address is located 88 bytes inside of [ 31.316648] freed 168-byte region [ffff888018014cb0, ffff888018014d58) [ 31.318032] [ 31.318244] The buggy address belongs to the physical page: [ 31.318882] page:0000000015adbac8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18014 [ 31.319937] memcg:ffff888016dbd301 [ 31.320356] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.320987] page_type: 0xffffffff() [ 31.321435] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.322327] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016dbd301 [ 31.323196] page dumped because: kasan: bad access detected [ 31.323835] [ 31.324048] Memory state around the buggy address: [ 31.324621] ffff888018014c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.325468] ffff888018014c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.326298] >ffff888018014d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.327122] ^ [ 31.327543] ffff888018014d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.328372] ffff888018014e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.329192] ================================================================== [ 31.330087] Disabling lock debugging due to kernel taint [ 34.035513] BUG: Bad rss-counter state mm:00000000050c85bd type:MM_FILEPAGES val:33 [ 34.037210] BUG: Bad rss-counter state mm:00000000050c85bd type:MM_ANONPAGES val:22 [ 34.527934] BUG: Bad rss-counter state mm:00000000da7625c3 type:MM_FILEPAGES val:33 [ 34.529109] BUG: Bad rss-counter state mm:00000000da7625c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17339' (ECDSA) to the list of known hosts. 2023/06/20 00:01:34 fuzzer started 2023/06/20 00:01:34 dialing manager at localhost:44161 2023/06/20 00:01:34 checking machine... 2023/06/20 00:01:34 checking revisions... [ 35.247586] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:01:34 testing simple program... [ 35.296120] cgroup: Unknown subsys name 'net' [ 35.335955] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:01:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801836a670 RCX=ffffffff818465f5 RDX=1ffff1100306d4ce RSI=0000000000000000 RDI=ffff88801836a670 RBP=0000000000000000 RSP=ffff88806ce09d70 R8 =0000000000000001 R9 =ffffed100306d4d0 R10=ffff88801836a683 R11=00000000000b6996 R12=ffffffff81845c80 R13=ffffea000064b400 R14=ffffffff818d9dc6 R15=ffff88800ccd4200 RIP=ffffffff811430ca 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 00007f8c58351900 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=00007f8c58906650 CR3=0000000014782000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=ffff888008c58400 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=00007ffefb75b7b8 CR3=0000000005482000 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=00007f7562fb05100000563bfb9b8790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000