syzkaller login: [ 30.795812] BUG: Bad rss-counter state mm:0000000029b3ce89 type:MM_FILEPAGES val:33 [ 30.796830] BUG: Bad rss-counter state mm:0000000029b3ce89 type:MM_ANONPAGES val:22 [ 30.956069] ================================================================== [ 30.957158] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.958260] Read of size 8 at addr ffff888015b31ed8 by task sshd/221 [ 30.959328] [ 30.959604] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.960626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.961871] Call Trace: [ 30.962259] [ 30.962600] dump_stack_lvl+0x91/0xf0 [ 30.963181] print_report+0xcc/0x620 [ 30.963784] ? __virt_addr_valid+0x102/0x340 [ 30.964444] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.965202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.965970] kasan_report+0xbe/0xf0 [ 30.966562] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.967356] vma_interval_tree_remove+0xc75/0xec0 [ 30.968028] vma_prepare+0xc54/0x11a0 [ 30.968510] __split_vma+0x5af/0x950 [ 30.968988] ? __pfx___split_vma+0x10/0x10 [ 30.969521] ? find_held_lock+0x2c/0x110 [ 30.970040] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.970605] ? lock_is_held_type+0x9f/0x120 [ 30.971143] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.971768] ? mtree_range_walk+0x632/0x900 [ 30.972313] ? mas_walk+0x5c7/0x7c0 [ 30.972789] do_vmi_munmap+0x1f1/0x2b0 [ 30.973280] mmap_region+0x1f9/0x2660 [ 30.973760] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.974272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.974991] ? __pfx_lock_acquire+0x10/0x10 [ 30.975534] ? __pfx_mmap_region+0x10/0x10 [ 30.976070] ? security_mmap_addr+0x7d/0xa0 [ 30.976608] ? get_unmapped_area+0x1f5/0x3f0 [ 30.977169] do_mmap+0x854/0xf00 [ 30.977626] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.978128] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.978705] ksys_mmap_pgoff+0x3af/0x500 [ 30.979232] do_syscall_64+0x3f/0x90 [ 30.979739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.980398] RIP: 0033:0x7fc9596a7d82 [ 30.980855] 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 [ 30.983006] RSP: 002b:00007ffd54c09d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.983922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9596a7d82 [ 30.984793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc958ae1000 [ 30.985635] RBP: 00007fc958ae1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.986473] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561614f92f70 [ 30.987336] R13: 00007ffd54c09d20 R14: 00007ffd54c09d50 R15: 00007ffd54c0a0b0 [ 30.988200] [ 30.988496] [ 30.988715] Allocated by task 214: [ 30.989145] kasan_save_stack+0x22/0x50 [ 30.989654] kasan_set_track+0x25/0x30 [ 30.990146] __kasan_slab_alloc+0x59/0x70 [ 30.990675] kmem_cache_alloc+0x16b/0x370 [ 30.991192] vm_area_dup+0x20/0x160 [ 30.991659] __split_vma+0x170/0x950 [ 30.992127] split_vma+0xc6/0x110 [ 30.992573] mprotect_fixup+0x8d2/0xb30 [ 30.993076] do_mprotect_pkey+0x87e/0xd40 [ 30.993602] __x64_sys_mprotect+0x78/0xc0 [ 30.994128] do_syscall_64+0x3f/0x90 [ 30.994606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.995250] [ 30.995475] Freed by task 214: [ 30.995868] kasan_save_stack+0x22/0x50 [ 30.996375] kasan_set_track+0x25/0x30 [ 30.996868] kasan_save_free_info+0x2b/0x50 [ 30.997405] __kasan_slab_free+0x10a/0x190 [ 30.997944] kmem_cache_free+0x10d/0x4d0 [ 30.998452] rcu_core+0x8c8/0x2860 [ 30.998902] __do_softirq+0x1b7/0x7d4 [ 30.999401] [ 30.999618] Last potentially related work creation: [ 31.000202] kasan_save_stack+0x22/0x50 [ 31.000782] __kasan_record_aux_stack+0x8e/0xa0 [ 31.001371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.002006] remove_vma+0x139/0x170 [ 31.002461] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.003021] do_vmi_munmap+0x1f1/0x2b0 [ 31.003519] __vm_munmap+0x138/0x3a0 [ 31.003988] __x64_sys_munmap+0x59/0x80 [ 31.004496] do_syscall_64+0x3f/0x90 [ 31.004972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.005612] [ 31.005832] The buggy address belongs to the object at ffff888015b31e80 [ 31.005832] which belongs to the cache vm_area_struct of size 168 [ 31.007306] The buggy address is located 88 bytes inside of [ 31.007306] freed 168-byte region [ffff888015b31e80, ffff888015b31f28) [ 31.008741] [ 31.008962] The buggy address belongs to the physical page: [ 31.009627] page:00000000bf20638c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b31 [ 31.010726] memcg:ffff888015b32001 [ 31.011162] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.011819] page_type: 0xffffffff() [ 31.012278] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.013199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b32001 [ 31.014105] page dumped because: kasan: bad access detected [ 31.014766] [ 31.014984] Memory state around the buggy address: [ 31.015571] ffff888015b31d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.016437] ffff888015b31e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.017298] >ffff888015b31e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.018159] ^ [ 31.018895] ffff888015b31f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.019762] ffff888015b31f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.020619] ================================================================== [ 31.021532] Disabling lock debugging due to kernel taint [ 32.781038] BUG: Bad rss-counter state mm:0000000003af7e7d type:MM_FILEPAGES val:33 [ 32.782134] BUG: Bad rss-counter state mm:0000000003af7e7d type:MM_ANONPAGES val:22 [ 33.233164] BUG: Bad rss-counter state mm:0000000093db9676 type:MM_FILEPAGES val:33 [ 33.234324] BUG: Bad rss-counter state mm:0000000093db9676 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63671' (ECDSA) to the list of known hosts. 2023/06/21 04:32:31 fuzzer started 2023/06/21 04:32:31 dialing manager at localhost:36067 2023/06/21 04:32:31 checking machine... 2023/06/21 04:32:31 checking revisions... [ 33.835138] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:32:31 testing simple program... [ 33.869182] cgroup: Unknown subsys name 'net' [ 33.922957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:32:31 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff864b3801 RDX=1ffff1100d9c1386 RSI=ffffffff81288ac5 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a98 R8 =ffffffff864b381e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800c6f87a0 RIP=ffffffff810bd052 RFL=00000202 [-------] 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 0000000000000000 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=00007f9acf364d50 CR3=000000000eb54000 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=2031333a32333a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a32333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff861297b1 RBX=0000000000000001 RCX=ffffffff861297ae RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff861297b0 RBP=ffff88800fbcf708 RSP=ffff88800fbcf640 R8 =0000000000000001 R9 =ffff88800fbcf6f0 R10=0000000000038001 R11=000000000001e471 R12=ffff88800fbcf710 R13=ffff88800fbcf6f8 R14=ffff88800fbcff28 R15=ffff88800fbcf6b0 RIP=ffffffff811311e5 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 00007f1f746fd900 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=00007f1f746c2008 CR3=0000000018218000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000