syzkaller login: [ 28.904082] BUG: Bad rss-counter state mm:000000008e378e6f type:MM_FILEPAGES val:33 [ 28.905337] BUG: Bad rss-counter state mm:000000008e378e6f type:MM_ANONPAGES val:22 [ 28.948033] ================================================================== [ 28.949112] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.950043] Read of size 8 at addr ffff88800e2f55c8 by task sshd/221 [ 28.950805] [ 28.951025] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.951883] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.952864] Call Trace: [ 28.953186] [ 28.953476] dump_stack_lvl+0x91/0xf0 [ 28.953972] print_report+0xcc/0x620 [ 28.954458] ? __virt_addr_valid+0x102/0x340 [ 28.955012] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.955630] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.956257] kasan_report+0xbe/0xf0 [ 28.956736] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.957356] vma_interval_tree_remove+0xc75/0xec0 [ 28.957961] vma_prepare+0xc54/0x11a0 [ 28.958447] __split_vma+0x5af/0x950 [ 28.958922] ? __pfx___split_vma+0x10/0x10 [ 28.959455] ? find_held_lock+0x2c/0x110 [ 28.960000] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.960574] ? lock_is_held_type+0x9f/0x120 [ 28.961158] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.961805] ? mtree_range_walk+0x632/0x900 [ 28.962385] ? mas_walk+0x5c7/0x7c0 [ 28.962884] do_vmi_munmap+0x1f1/0x2b0 [ 28.963405] mmap_region+0x1f9/0x2660 [ 28.963909] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.964453] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.965220] ? __pfx_lock_acquire+0x10/0x10 [ 28.965795] ? __pfx_mmap_region+0x10/0x10 [ 28.966362] ? security_mmap_addr+0x7d/0xa0 [ 28.966938] ? get_unmapped_area+0x1f5/0x3f0 [ 28.967528] do_mmap+0x854/0xf00 [ 28.968004] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.968520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.969120] ksys_mmap_pgoff+0x3af/0x500 [ 28.969658] do_syscall_64+0x3f/0x90 [ 28.970161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.970835] RIP: 0033:0x7f5e57591d82 [ 28.971330] 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 [ 28.973607] RSP: 002b:00007fff3affc4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.974547] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e57591d82 [ 28.975465] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e569cb000 [ 28.976381] RBP: 00007f5e569cb000 R08: 0000000000000009 R09: 0000000000001000 [ 28.977289] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a95ee8ec0 [ 28.978216] R13: 00007fff3affc510 R14: 00007fff3affc540 R15: 00007fff3affc8a0 [ 28.979144] [ 28.979459] [ 28.979690] Allocated by task 213: [ 28.980183] kasan_save_stack+0x22/0x50 [ 28.980711] kasan_set_track+0x25/0x30 [ 28.981234] __kasan_slab_alloc+0x59/0x70 [ 28.981794] kmem_cache_alloc+0x16b/0x370 [ 28.982352] vm_area_dup+0x20/0x160 [ 28.982846] __split_vma+0x170/0x950 [ 28.983336] split_vma+0xc6/0x110 [ 28.983797] mprotect_fixup+0x8d2/0xb30 [ 28.984342] do_mprotect_pkey+0x87e/0xd40 [ 28.984886] __x64_sys_mprotect+0x78/0xc0 [ 28.985435] do_syscall_64+0x3f/0x90 [ 28.985947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.986647] [ 28.986883] Freed by task 213: [ 28.987317] kasan_save_stack+0x22/0x50 [ 28.987847] kasan_set_track+0x25/0x30 [ 28.988366] kasan_save_free_info+0x2b/0x50 [ 28.988937] __kasan_slab_free+0x10a/0x190 [ 28.989511] kmem_cache_free+0x10d/0x4d0 [ 28.990064] rcu_core+0x8c8/0x2860 [ 28.990543] __do_softirq+0x1b7/0x7d4 [ 28.991048] [ 28.991276] Last potentially related work creation: [ 28.991908] kasan_save_stack+0x22/0x50 [ 28.992453] __kasan_record_aux_stack+0x8e/0xa0 [ 28.993092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.993793] remove_vma+0x139/0x170 [ 28.994279] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.994860] do_vmi_munmap+0x1f1/0x2b0 [ 28.995371] __vm_munmap+0x138/0x3a0 [ 28.995874] __x64_sys_munmap+0x59/0x80 [ 28.996403] do_syscall_64+0x3f/0x90 [ 28.996901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.997593] [ 28.997824] The buggy address belongs to the object at ffff88800e2f5570 [ 28.997824] which belongs to the cache vm_area_struct of size 168 [ 28.999407] The buggy address is located 88 bytes inside of [ 28.999407] freed 168-byte region [ffff88800e2f5570, ffff88800e2f5618) [ 29.000921] [ 29.001152] The buggy address belongs to the physical page: [ 29.001857] page:00000000a8333e2f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2f5 [ 29.002986] memcg:ffff88800eb2fd01 [ 29.003447] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.004216] page_type: 0xffffffff() [ 29.004705] raw: 0100000000000200 ffff8880087a0c80 ffffea000039a380 dead000000000007 [ 29.005662] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb2fd01 [ 29.006648] page dumped because: kasan: bad access detected [ 29.007361] [ 29.007594] Memory state around the buggy address: [ 29.008218] ffff88800e2f5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.009141] ffff88800e2f5500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.010073] >ffff88800e2f5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.010986] ^ [ 29.011704] ffff88800e2f5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.012628] ffff88800e2f5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.013557] ================================================================== [ 29.014560] Disabling lock debugging due to kernel taint [ 31.029639] BUG: Bad rss-counter state mm:000000009f867051 type:MM_FILEPAGES val:33 [ 31.030874] BUG: Bad rss-counter state mm:000000009f867051 type:MM_ANONPAGES val:22 [ 31.490042] BUG: Bad rss-counter state mm:00000000637f3329 type:MM_FILEPAGES val:33 [ 31.491186] BUG: Bad rss-counter state mm:00000000637f3329 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24546' (ECDSA) to the list of known hosts. 2023/06/21 08:46:30 fuzzer started 2023/06/21 08:46:30 dialing manager at localhost:36067 2023/06/21 08:46:30 checking machine... 2023/06/21 08:46:30 checking revisions... [ 32.259233] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:46:30 testing simple program... [ 32.312537] cgroup: Unknown subsys name 'net' [ 32.354062] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:46:30 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff888019c27d10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000287 R13=ffff88800944f3d8 R14=ffffffff818937f2 R15=dffffc0000000000 RIP=ffffffff8135b930 RFL=00000047 [---Z-PC] 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 00007fac19126900 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=00007fac196de0b0 CR3=000000000e568000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888010290140 RCX=ffffffff8181f3a9 RDX=ffff88800d680000 RSI=0000000000000000 RDI=0000000000000006 RBP=000000000000039f RSP=ffff88800d69f810 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=1ffff11001ad3f04 R13=0000000000000000 R14=ffff8880102901e0 R15=ffff888010290188 RIP=ffffffff814c086b 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 00007fe5b29b0900 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=00007fe5b1dc08f0 CR3=000000000c644000 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=c35470cb243ecdbe00000000000ae988 XMM05=4d50663bdf1afc0500000000001332e0 XMM06=e4cb8bb95a7664b60000000000132178 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000