syzkaller login: [ 38.824229] BUG: Bad rss-counter state mm:00000000df16ce34 type:MM_FILEPAGES val:33 [ 38.825456] BUG: Bad rss-counter state mm:00000000df16ce34 type:MM_ANONPAGES val:22 [ 38.985938] ================================================================== [ 38.986823] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.987746] Read of size 8 at addr ffff88800f175a50 by task sshd/219 [ 38.988506] [ 38.988732] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.989674] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.990629] Call Trace: [ 38.990960] [ 38.991237] dump_stack_lvl+0x91/0xf0 [ 38.991743] print_report+0xcc/0x620 [ 38.992218] ? __virt_addr_valid+0x102/0x340 [ 38.992780] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.993394] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.994006] kasan_report+0xbe/0xf0 [ 38.994480] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.995098] vma_interval_tree_remove+0xc75/0xec0 [ 38.995695] vma_prepare+0xc54/0x11a0 [ 38.996177] __split_vma+0x5af/0x950 [ 38.996659] ? __pfx___split_vma+0x10/0x10 [ 38.997186] ? find_held_lock+0x2c/0x110 [ 38.997703] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.998261] ? lock_is_held_type+0x9f/0x120 [ 38.998795] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.999397] ? mtree_range_walk+0x632/0x900 [ 38.999950] ? mas_walk+0x5c7/0x7c0 [ 39.000450] do_vmi_munmap+0x1f1/0x2b0 [ 39.000935] mmap_region+0x1f9/0x2660 [ 39.001419] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.001927] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.002629] ? __pfx_lock_acquire+0x10/0x10 [ 39.003162] ? __pfx_mmap_region+0x10/0x10 [ 39.003694] ? security_mmap_addr+0x7d/0xa0 [ 39.004225] ? get_unmapped_area+0x1f5/0x3f0 [ 39.004773] do_mmap+0x854/0xf00 [ 39.005214] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.005708] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.006264] ksys_mmap_pgoff+0x3af/0x500 [ 39.006767] do_syscall_64+0x3f/0x90 [ 39.007243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.007885] RIP: 0033:0x7f58661e8d82 [ 39.008343] 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 [ 39.010464] RSP: 002b:00007fff802d38b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.011360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58661e8d82 [ 39.012213] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5865622000 [ 39.013073] RBP: 00007f5865622000 R08: 0000000000000009 R09: 0000000000001000 [ 39.013902] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560197e2ad90 [ 39.014733] R13: 00007fff802d38d0 R14: 00007fff802d3900 R15: 00007fff802d3c60 [ 39.015585] [ 39.015931] [ 39.016144] Allocated by task 212: [ 39.016576] kasan_save_stack+0x22/0x50 [ 39.017077] kasan_set_track+0x25/0x30 [ 39.017570] __kasan_slab_alloc+0x59/0x70 [ 39.018093] kmem_cache_alloc+0x16b/0x370 [ 39.018608] vm_area_dup+0x20/0x160 [ 39.019060] __split_vma+0x170/0x950 [ 39.019521] split_vma+0xc6/0x110 [ 39.019955] mprotect_fixup+0x8d2/0xb30 [ 39.020463] do_mprotect_pkey+0x87e/0xd40 [ 39.020980] __x64_sys_mprotect+0x78/0xc0 [ 39.021502] do_syscall_64+0x3f/0x90 [ 39.021973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.022607] [ 39.022824] Freed by task 212: [ 39.023211] kasan_save_stack+0x22/0x50 [ 39.023710] kasan_set_track+0x25/0x30 [ 39.024199] kasan_save_free_info+0x2b/0x50 [ 39.024745] __kasan_slab_free+0x10a/0x190 [ 39.025271] kmem_cache_free+0x10d/0x4d0 [ 39.025775] rcu_core+0x8c8/0x2860 [ 39.026210] __do_softirq+0x1b7/0x7d4 [ 39.026684] [ 39.026894] Last potentially related work creation: [ 39.027466] kasan_save_stack+0x22/0x50 [ 39.027965] __kasan_record_aux_stack+0x8e/0xa0 [ 39.028534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.029169] remove_vma+0x139/0x170 [ 39.029608] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.030172] do_vmi_munmap+0x1f1/0x2b0 [ 39.030649] __vm_munmap+0x138/0x3a0 [ 39.031111] __x64_sys_munmap+0x59/0x80 [ 39.031602] do_syscall_64+0x3f/0x90 [ 39.032074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.032731] [ 39.032945] The buggy address belongs to the object at ffff88800f1759f8 [ 39.032945] which belongs to the cache vm_area_struct of size 168 [ 39.034402] The buggy address is located 88 bytes inside of [ 39.034402] freed 168-byte region [ffff88800f1759f8, ffff88800f175aa0) [ 39.035799] [ 39.036014] The buggy address belongs to the physical page: [ 39.036673] page:0000000092e6a578 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf175 [ 39.037747] memcg:ffff888009552a01 [ 39.038170] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.038865] page_type: 0xffffffff() [ 39.039310] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.040227] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009552a01 [ 39.041146] page dumped because: kasan: bad access detected [ 39.041803] [ 39.042020] Memory state around the buggy address: [ 39.042598] ffff88800f175900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.043446] ffff88800f175980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.044300] >ffff88800f175a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.045154] ^ [ 39.045847] ffff88800f175a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.046699] ffff88800f175b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.047545] ================================================================== [ 39.048520] Disabling lock debugging due to kernel taint [ 41.775142] BUG: Bad rss-counter state mm:00000000c1543600 type:MM_FILEPAGES val:33 [ 41.776746] BUG: Bad rss-counter state mm:00000000c1543600 type:MM_ANONPAGES val:22 [ 42.319030] BUG: Bad rss-counter state mm:000000005560d130 type:MM_FILEPAGES val:33 [ 42.320687] BUG: Bad rss-counter state mm:000000005560d130 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6680' (ECDSA) to the list of known hosts. 2023/06/20 23:36:06 fuzzer started 2023/06/20 23:36:06 dialing manager at localhost:36067 2023/06/20 23:36:06 checking machine... 2023/06/20 23:36:06 checking revisions... [ 43.059315] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:36:06 testing simple program... [ 43.114401] cgroup: Unknown subsys name 'net' [ 43.180686] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:36:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000565130d87780 RCX=0000565130d51010 RDX=0000000000000005 RSI=0000000000008000 RDI=0000565130d70350 RBP=0000000000000000 RSP=00007fff197a40d0 R8 =0000565130d962c0 R9 =0000000000000000 R10=000056512fb73d0c R11=0000000000000246 R12=00000000ffffffe3 R13=000056512fb6c1c0 R14=00007fff197a4470 R15=00007fff197a4220 RIP=00007f1e61dbcbc2 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1e61297900 00000000 00000000 GS =0000 0000000000000000 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=0000565130d9a768 CR3=000000000e940000 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=0000000000000000000056512fb14060 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=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000101f1 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800a3701a0 RSP=ffff888008e4f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f1 R11=0000000000000000 R12=00000000000101f1 R13=ffff88800a370050 R14=ffff88800a370048 R15=ffff88800a370060 RIP=ffffffff82191d9e RFL=00000093 [--S-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 0000000000000000 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=00007fdae471c7f0 CR3=000000000df04000 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=2035303a36333a3332203032206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a363530353320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a36333a3332203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000