syzkaller login: [ 47.451571] BUG: Bad rss-counter state mm:00000000f45db695 type:MM_FILEPAGES val:33 [ 47.452415] BUG: Bad rss-counter state mm:00000000f45db695 type:MM_ANONPAGES val:22 [ 47.568062] ================================================================== [ 47.568563] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.569079] Read of size 8 at addr ffff88801625e4e0 by task sshd/220 [ 47.569504] [ 47.569622] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.570229] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.570889] Call Trace: [ 47.571102] [ 47.571295] dump_stack_lvl+0x91/0xf0 [ 47.571633] print_report+0xcc/0x620 [ 47.571977] ? __virt_addr_valid+0x102/0x340 [ 47.572345] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.572772] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.573189] kasan_report+0xbe/0xf0 [ 47.573514] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.573938] vma_interval_tree_remove+0xc75/0xec0 [ 47.574352] vma_prepare+0xc54/0x11a0 [ 47.574671] __split_vma+0x5af/0x950 [ 47.574991] ? __pfx___split_vma+0x10/0x10 [ 47.575350] ? find_held_lock+0x2c/0x110 [ 47.575721] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.576101] ? lock_is_held_type+0x9f/0x120 [ 47.576472] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.576888] ? mtree_range_walk+0x632/0x900 [ 47.577261] ? mas_walk+0x5c7/0x7c0 [ 47.577581] do_vmi_munmap+0x1f1/0x2b0 [ 47.577912] mmap_region+0x1f9/0x2660 [ 47.578241] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.578590] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.579070] ? __pfx_lock_acquire+0x10/0x10 [ 47.579432] ? __pfx_mmap_region+0x10/0x10 [ 47.579822] ? security_mmap_addr+0x7d/0xa0 [ 47.580180] ? get_unmapped_area+0x1f5/0x3f0 [ 47.580555] do_mmap+0x854/0xf00 [ 47.580853] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.581188] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.581571] ksys_mmap_pgoff+0x3af/0x500 [ 47.581914] do_syscall_64+0x3f/0x90 [ 47.582232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.582683] RIP: 0033:0x7f6c5f776d82 [ 47.582992] 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 [ 47.584443] RSP: 002b:00007ffca4df5888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.585069] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c5f776d82 [ 47.585642] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c5ebb0000 [ 47.586210] RBP: 00007f6c5ebb0000 R08: 0000000000000009 R09: 0000000000001000 [ 47.586791] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be3e8c4d90 [ 47.587375] R13: 00007ffca4df58a0 R14: 00007ffca4df58d0 R15: 00007ffca4df5c30 [ 47.587987] [ 47.588191] [ 47.588337] Allocated by task 213: [ 47.588624] kasan_save_stack+0x22/0x50 [ 47.588962] kasan_set_track+0x25/0x30 [ 47.589302] __kasan_slab_alloc+0x59/0x70 [ 47.589663] kmem_cache_alloc+0x16b/0x370 [ 47.590017] vm_area_dup+0x20/0x160 [ 47.590323] __split_vma+0x170/0x950 [ 47.590644] split_vma+0xc6/0x110 [ 47.590941] mprotect_fixup+0x8d2/0xb30 [ 47.591282] do_mprotect_pkey+0x87e/0xd40 [ 47.591633] __x64_sys_mprotect+0x78/0xc0 [ 47.592005] do_syscall_64+0x3f/0x90 [ 47.592321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.592807] [ 47.592953] Freed by task 213: [ 47.593222] kasan_save_stack+0x22/0x50 [ 47.593558] kasan_set_track+0x25/0x30 [ 47.593889] kasan_save_free_info+0x2b/0x50 [ 47.594251] __kasan_slab_free+0x10a/0x190 [ 47.594622] kmem_cache_free+0x10d/0x4d0 [ 47.594969] rcu_core+0x8c8/0x2860 [ 47.595272] __do_softirq+0x1b7/0x7d4 [ 47.595602] [ 47.595761] Last potentially related work creation: [ 47.596157] kasan_save_stack+0x22/0x50 [ 47.596494] __kasan_record_aux_stack+0x8e/0xa0 [ 47.596880] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.597318] remove_vma+0x139/0x170 [ 47.597630] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.598008] do_vmi_munmap+0x1f1/0x2b0 [ 47.598334] __vm_munmap+0x138/0x3a0 [ 47.598646] __x64_sys_munmap+0x59/0x80 [ 47.598981] do_syscall_64+0x3f/0x90 [ 47.599305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.599764] [ 47.599909] The buggy address belongs to the object at ffff88801625e488 [ 47.599909] which belongs to the cache vm_area_struct of size 168 [ 47.600886] The buggy address is located 88 bytes inside of [ 47.600886] freed 168-byte region [ffff88801625e488, ffff88801625e530) [ 47.601837] [ 47.601985] The buggy address belongs to the physical page: [ 47.602430] page:00000000fa439a8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1625e [ 47.603170] memcg:ffff88801596b801 [ 47.603472] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.603950] page_type: 0xffffffff() [ 47.604265] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.604882] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801596b801 [ 47.605495] page dumped because: kasan: bad access detected [ 47.605947] [ 47.606090] Memory state around the buggy address: [ 47.606487] ffff88801625e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.607061] ffff88801625e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 47.607661] >ffff88801625e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.608242] ^ [ 47.608748] ffff88801625e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 47.609335] ffff88801625e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.609903] ================================================================== [ 47.610899] Disabling lock debugging due to kernel taint [ 49.423119] BUG: Bad rss-counter state mm:00000000983f549c type:MM_FILEPAGES val:33 [ 49.424164] BUG: Bad rss-counter state mm:00000000983f549c type:MM_ANONPAGES val:22 [ 49.772285] BUG: Bad rss-counter state mm:00000000d14afe7e type:MM_FILEPAGES val:33 [ 49.772957] BUG: Bad rss-counter state mm:00000000d14afe7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45746' (ECDSA) to the list of known hosts. 2023/06/20 09:38:33 fuzzer started 2023/06/20 09:38:33 dialing manager at localhost:44161 2023/06/20 09:38:33 checking machine... 2023/06/20 09:38:33 checking revisions... [ 50.288982] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:38:34 testing simple program... [ 50.329465] cgroup: Unknown subsys name 'net' [ 50.382006] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:38:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856528e0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=00007f8723c89c64 RSP=ffff8880158b7928 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f8723c89c64 R13=0000000000000000 R14=ffff88800cc8d1c0 R15=dffffc0000000000 RIP=ffffffff812d8e20 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 00007f87233d0900 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=00007f8722846790 CR3=000000000f736000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f9ff67b707199ce300000000000ae988 XMM05=081b23a9d99639280000000000134828 XMM06=4fda316b135da52b0000000000133618 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180ee7e RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff1100d9e1359 RSI=ffffffff8180ee7e RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =ffffffff8613751e R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888018009b40 R15=ffff88800e9bd580 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007f32fc030900 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=00007fff18843000 CR3=00000000095e0000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000