syzkaller login: [ 33.614346] BUG: Bad rss-counter state mm:00000000c195949a type:MM_FILEPAGES val:33 [ 33.615339] BUG: Bad rss-counter state mm:00000000c195949a type:MM_ANONPAGES val:22 [ 33.753451] ================================================================== [ 33.754161] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.754886] Read of size 8 at addr ffff88801a5525c8 by task sshd/219 [ 33.755558] [ 33.755725] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.756392] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.757147] Call Trace: [ 33.757394] [ 33.757611] dump_stack_lvl+0x91/0xf0 [ 33.757989] print_report+0xcc/0x620 [ 33.758364] ? __virt_addr_valid+0x102/0x340 [ 33.758788] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.759268] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.759747] kasan_report+0xbe/0xf0 [ 33.760120] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.760596] vma_interval_tree_remove+0xc75/0xec0 [ 33.761057] vma_prepare+0xc54/0x11a0 [ 33.761430] __split_vma+0x5af/0x950 [ 33.761800] ? __pfx___split_vma+0x10/0x10 [ 33.762204] ? find_held_lock+0x2c/0x110 [ 33.762610] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.763047] ? lock_is_held_type+0x9f/0x120 [ 33.763464] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.763933] ? mtree_range_walk+0x632/0x900 [ 33.764379] ? mas_walk+0x5c7/0x7c0 [ 33.764747] do_vmi_munmap+0x1f1/0x2b0 [ 33.765128] mmap_region+0x1f9/0x2660 [ 33.765506] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.765906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.766464] ? __pfx_lock_acquire+0x10/0x10 [ 33.766875] ? __pfx_mmap_region+0x10/0x10 [ 33.767282] ? security_mmap_addr+0x7d/0xa0 [ 33.767696] ? get_unmapped_area+0x1f5/0x3f0 [ 33.768128] do_mmap+0x854/0xf00 [ 33.768469] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.768857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.769297] ksys_mmap_pgoff+0x3af/0x500 [ 33.769691] do_syscall_64+0x3f/0x90 [ 33.770062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.770557] RIP: 0033:0x7f6a82894d82 [ 33.770913] 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 [ 33.772590] RSP: 002b:00007fffea0cf198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.773303] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a82894d82 [ 33.773967] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a81cce000 [ 33.774635] RBP: 00007f6a81cce000 R08: 0000000000000009 R09: 0000000000001000 [ 33.775294] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645711a9ec0 [ 33.775949] R13: 00007fffea0cf1b0 R14: 00007fffea0cf1e0 R15: 00007fffea0cf540 [ 33.776623] [ 33.776850] [ 33.777016] Allocated by task 212: [ 33.777358] kasan_save_stack+0x22/0x50 [ 33.777746] kasan_set_track+0x25/0x30 [ 33.778128] __kasan_slab_alloc+0x59/0x70 [ 33.778537] kmem_cache_alloc+0x16b/0x370 [ 33.778940] vm_area_dup+0x20/0x160 [ 33.779293] __split_vma+0x170/0x950 [ 33.779656] split_vma+0xc6/0x110 [ 33.780000] mprotect_fixup+0x8d2/0xb30 [ 33.780404] do_mprotect_pkey+0x87e/0xd40 [ 33.780812] __x64_sys_mprotect+0x78/0xc0 [ 33.781218] do_syscall_64+0x3f/0x90 [ 33.781585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.782085] [ 33.782256] Freed by task 13: [ 33.782558] kasan_save_stack+0x22/0x50 [ 33.782948] kasan_set_track+0x25/0x30 [ 33.783330] kasan_save_free_info+0x2b/0x50 [ 33.783749] __kasan_slab_free+0x10a/0x190 [ 33.784172] kmem_cache_free+0x10d/0x4d0 [ 33.784575] rcu_core+0x8c8/0x2860 [ 33.784921] __do_softirq+0x1b7/0x7d4 [ 33.785294] [ 33.785463] Last potentially related work creation: [ 33.785921] kasan_save_stack+0x22/0x50 [ 33.786314] __kasan_record_aux_stack+0x8e/0xa0 [ 33.786761] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.787263] remove_vma+0x139/0x170 [ 33.787611] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.788043] do_vmi_munmap+0x1f1/0x2b0 [ 33.788438] __vm_munmap+0x138/0x3a0 [ 33.788798] __x64_sys_munmap+0x59/0x80 [ 33.789182] do_syscall_64+0x3f/0x90 [ 33.789551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.790049] [ 33.790222] The buggy address belongs to the object at ffff88801a552570 [ 33.790222] which belongs to the cache vm_area_struct of size 168 [ 33.791388] The buggy address is located 88 bytes inside of [ 33.791388] freed 168-byte region [ffff88801a552570, ffff88801a552618) [ 33.792503] [ 33.792671] The buggy address belongs to the physical page: [ 33.793188] page:00000000afc5c81f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a552 [ 33.794037] memcg:ffff888017e4b201 [ 33.794364] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.794866] page_type: 0xffffffff() [ 33.795223] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.795943] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e4b201 [ 33.796670] page dumped because: kasan: bad access detected [ 33.797189] [ 33.797355] Memory state around the buggy address: [ 33.797811] ffff88801a552480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.798480] ffff88801a552500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 33.799152] >ffff88801a552580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.799853] ^ [ 33.800402] ffff88801a552600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.801067] ffff88801a552680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.801734] ================================================================== [ 33.802523] Disabling lock debugging due to kernel taint [ 35.805025] BUG: Bad rss-counter state mm:000000002fe6079b type:MM_FILEPAGES val:33 [ 35.806232] BUG: Bad rss-counter state mm:000000002fe6079b type:MM_ANONPAGES val:22 [ 36.231519] BUG: Bad rss-counter state mm:000000009009f2a6 type:MM_FILEPAGES val:33 [ 36.232955] BUG: Bad rss-counter state mm:000000009009f2a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27663' (ECDSA) to the list of known hosts. 2023/06/19 11:42:09 fuzzer started 2023/06/19 11:42:09 dialing manager at localhost:44161 2023/06/19 11:42:09 checking machine... 2023/06/19 11:42:09 checking revisions... [ 36.987639] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:42:09 testing simple program... [ 37.053253] cgroup: Unknown subsys name 'net' [ 37.094793] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:42:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce395c0 RCX=1ffff11002bdba52 RDX=1ffff1100d9c72bf RSI=ffff888015edd1c0 RDI=ffff88806ce395e8 RBP=ffff888015edd240 RSP=ffff88806ce09cd0 R8 =ffff88806ce39f40 R9 =ffffed100d9c13a3 R10=0000000000000003 R11=00000016214c6348 R12=000000000006172c R13=0000000000000000 R14=ffff888015edd290 R15=ffff88806ce395c0 RIP=ffffffff8124ff43 RFL=00000046 [---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 00007f71b7ed3900 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=000055e382491c34 CR3=000000000dadc000 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=0000000000000000000055e3813e3060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09a98 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e28 RDI=ffff88806cf09aa8 RBP=ffff88806cf09e28 RSP=ffff88806cf099f0 R8 =ffffffff861375e4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09e30 R15=ffff88806cf09a98 RIP=ffffffff8113048d RFL=00000283 [--S---C] 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 00007fae0770c700 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=00007f4716f0d008 CR3=000000000dd74000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38313130352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383131 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000