syzkaller login: [ 31.409750] BUG: Bad rss-counter state mm:00000000e146a863 type:MM_FILEPAGES val:33 [ 31.410736] BUG: Bad rss-counter state mm:00000000e146a863 type:MM_ANONPAGES val:22 [ 31.554637] ================================================================== [ 31.555573] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.556530] Read of size 8 at addr ffff88800c550c20 by task sshd/221 [ 31.557314] [ 31.557607] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.558494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.559484] Call Trace: [ 31.559827] [ 31.560124] dump_stack_lvl+0x91/0xf0 [ 31.560621] print_report+0xcc/0x620 [ 31.561103] ? __virt_addr_valid+0x102/0x340 [ 31.561701] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.562314] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.562943] kasan_report+0xbe/0xf0 [ 31.563426] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.564058] vma_interval_tree_remove+0xc75/0xec0 [ 31.564720] vma_prepare+0xc54/0x11a0 [ 31.565255] __split_vma+0x5af/0x950 [ 31.565768] ? __pfx___split_vma+0x10/0x10 [ 31.566343] ? find_held_lock+0x2c/0x110 [ 31.566899] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.567534] ? lock_is_held_type+0x9f/0x120 [ 31.568120] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.568776] ? mtree_range_walk+0x632/0x900 [ 31.569396] ? mas_walk+0x5c7/0x7c0 [ 31.569909] do_vmi_munmap+0x1f1/0x2b0 [ 31.570437] mmap_region+0x1f9/0x2660 [ 31.570965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.571528] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.572284] ? __pfx_lock_acquire+0x10/0x10 [ 31.572836] ? __pfx_mmap_region+0x10/0x10 [ 31.573421] ? security_mmap_addr+0x7d/0xa0 [ 31.573981] ? get_unmapped_area+0x1f5/0x3f0 [ 31.574569] do_mmap+0x854/0xf00 [ 31.575031] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.575548] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.576132] ksys_mmap_pgoff+0x3af/0x500 [ 31.576669] do_syscall_64+0x3f/0x90 [ 31.577172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.577861] RIP: 0033:0x7f171d05dd82 [ 31.578336] 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 [ 31.580596] RSP: 002b:00007ffcbb793da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.581576] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f171d05dd82 [ 31.582462] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f171c497000 [ 31.583350] RBP: 00007f171c497000 R08: 0000000000000009 R09: 0000000000001000 [ 31.584241] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecf8cba980 [ 31.585146] R13: 00007ffcbb793dc0 R14: 00007ffcbb793df0 R15: 00007ffcbb794150 [ 31.586058] [ 31.586361] [ 31.586591] Allocated by task 214: [ 31.587041] kasan_save_stack+0x22/0x50 [ 31.587573] kasan_set_track+0x25/0x30 [ 31.588097] __kasan_slab_alloc+0x59/0x70 [ 31.588658] kmem_cache_alloc+0x16b/0x370 [ 31.589210] vm_area_dup+0x20/0x160 [ 31.589695] __split_vma+0x170/0x950 [ 31.590190] split_vma+0xc6/0x110 [ 31.590650] mprotect_fixup+0x8d2/0xb30 [ 31.591174] do_mprotect_pkey+0x87e/0xd40 [ 31.591702] __x64_sys_mprotect+0x78/0xc0 [ 31.592253] do_syscall_64+0x3f/0x90 [ 31.592739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.593424] [ 31.593641] Freed by task 204: [ 31.594034] kasan_save_stack+0x22/0x50 [ 31.594540] kasan_set_track+0x25/0x30 [ 31.595040] kasan_save_free_info+0x2b/0x50 [ 31.595572] __kasan_slab_free+0x10a/0x190 [ 31.596106] kmem_cache_free+0x10d/0x4d0 [ 31.596619] rcu_core+0x8c8/0x2860 [ 31.597064] __do_softirq+0x1b7/0x7d4 [ 31.597551] [ 31.597768] Last potentially related work creation: [ 31.598362] kasan_save_stack+0x22/0x50 [ 31.598874] __kasan_record_aux_stack+0x8e/0xa0 [ 31.599466] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.600112] remove_vma+0x139/0x170 [ 31.600573] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.601159] do_vmi_munmap+0x1f1/0x2b0 [ 31.601654] __vm_munmap+0x138/0x3a0 [ 31.602131] __x64_sys_munmap+0x59/0x80 [ 31.602641] do_syscall_64+0x3f/0x90 [ 31.603125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.603778] [ 31.603996] Second to last potentially related work creation: [ 31.604678] kasan_save_stack+0x22/0x50 [ 31.605187] __kasan_record_aux_stack+0x8e/0xa0 [ 31.605760] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.606403] remove_vma+0x139/0x170 [ 31.606860] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.607423] do_vmi_munmap+0x1f1/0x2b0 [ 31.607914] mmap_region+0x1f9/0x2660 [ 31.608396] do_mmap+0x854/0xf00 [ 31.608827] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.609326] ksys_mmap_pgoff+0x3af/0x500 [ 31.609832] do_syscall_64+0x3f/0x90 [ 31.610311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.610958] [ 31.611172] The buggy address belongs to the object at ffff88800c550bc8 [ 31.611172] which belongs to the cache vm_area_struct of size 168 [ 31.612630] The buggy address is located 88 bytes inside of [ 31.612630] freed 168-byte region [ffff88800c550bc8, ffff88800c550c70) [ 31.614061] [ 31.614279] The buggy address belongs to the physical page: [ 31.614950] page:00000000cced7c0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc550 [ 31.616042] memcg:ffff88800d88db01 [ 31.616469] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.617197] page_type: 0xffffffff() [ 31.617645] raw: 0100000000000200 ffff8880087a0c80 ffffea0000269c80 dead000000000007 [ 31.618571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d88db01 [ 31.619482] page dumped because: kasan: bad access detected [ 31.620149] [ 31.620364] Memory state around the buggy address: [ 31.620949] ffff88800c550b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.621835] ffff88800c550b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.622697] >ffff88800c550c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.623547] ^ [ 31.624077] ffff88800c550c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.624936] ffff88800c550d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.625812] ================================================================== [ 31.626792] Disabling lock debugging due to kernel taint [ 33.982590] BUG: Bad rss-counter state mm:00000000191a56c8 type:MM_FILEPAGES val:33 [ 33.983632] BUG: Bad rss-counter state mm:00000000191a56c8 type:MM_ANONPAGES val:22 [ 34.379435] BUG: Bad rss-counter state mm:0000000050a58354 type:MM_FILEPAGES val:33 [ 34.381215] BUG: Bad rss-counter state mm:0000000050a58354 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40959' (ECDSA) to the list of known hosts. 2023/06/21 07:06:26 fuzzer started 2023/06/21 07:06:26 dialing manager at localhost:36067 2023/06/21 07:06:26 checking machine... 2023/06/21 07:06:26 checking revisions... [ 35.148163] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:06:27 testing simple program... [ 35.199071] cgroup: Unknown subsys name 'net' [ 35.264068] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:06:26 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000282 RCX=00000000800c000b RDX=0000000000000001 RSI=ffffea00003fa080 RDI=ffff888008fae000 RBP=0000000000000000 RSP=ffff888016bef720 R8 =00000000800c000b R9 =0000000000000000 R10=ffffea00003fa080 R11=00000000000c000b R12=ffff888008fae000 R13=ffffea00003fa080 R14=ffff888008fae000 R15=0000000000000001 RIP=ffffffff81806246 RFL=00000082 [--S----] 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 00007f5787d4a900 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=00007ffc9b457ff8 CR3=000000001abce000 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=25252525252525252525252525252525 XMM01=ff0000000000ffff0000000000ff0000 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=ffffffff86138eb5 RBX=0000000000000002 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c271d6 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86138eb4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09df8 R15=ffff88806cf09a98 RIP=ffffffff81131127 RFL=00000213 [----A-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 00007f5bbdf13700 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=00007f67d5971cc0 CR3=0000000008ed4000 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=2036323a36303a3730203132206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a383533313420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a36303a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000