syzkaller login: [ 23.820800] BUG: Bad rss-counter state mm:000000002fb85c0f type:MM_FILEPAGES val:33 [ 23.821989] BUG: Bad rss-counter state mm:000000002fb85c0f type:MM_ANONPAGES val:22 [ 23.968127] ================================================================== [ 23.969243] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.970237] Read of size 8 at addr ffff88800d603df0 by task sshd/219 [ 23.971138] [ 23.971355] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.972210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.973206] Call Trace: [ 23.973525] [ 23.973815] dump_stack_lvl+0x91/0xf0 [ 23.974302] print_report+0xcc/0x620 [ 23.974782] ? __virt_addr_valid+0x102/0x340 [ 23.975339] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.975961] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.976573] kasan_report+0xbe/0xf0 [ 23.977081] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.977701] vma_interval_tree_remove+0xc75/0xec0 [ 23.978326] vma_prepare+0xc54/0x11a0 [ 23.978826] __split_vma+0x5af/0x950 [ 23.979320] ? __pfx___split_vma+0x10/0x10 [ 23.979870] ? find_held_lock+0x2c/0x110 [ 23.980408] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.981010] ? lock_is_held_type+0x9f/0x120 [ 23.981583] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.982218] ? mtree_range_walk+0x632/0x900 [ 23.982802] ? mas_walk+0x5c7/0x7c0 [ 23.983303] do_vmi_munmap+0x1f1/0x2b0 [ 23.983817] mmap_region+0x1f9/0x2660 [ 23.984314] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.984853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.985602] ? __pfx_lock_acquire+0x10/0x10 [ 23.986165] ? __pfx_mmap_region+0x10/0x10 [ 23.986719] ? security_mmap_addr+0x7d/0xa0 [ 23.987279] ? get_unmapped_area+0x1f5/0x3f0 [ 23.987858] do_mmap+0x854/0xf00 [ 23.988305] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.988838] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.989431] ksys_mmap_pgoff+0x3af/0x500 [ 23.989963] do_syscall_64+0x3f/0x90 [ 23.990446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.991094] RIP: 0033:0x7f4894f39d82 [ 23.991552] 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 [ 23.993705] RSP: 002b:00007ffd19182f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.994611] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4894f39d82 [ 23.995458] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4894373000 [ 23.996323] RBP: 00007f4894373000 R08: 0000000000000009 R09: 0000000000001000 [ 23.997186] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592de9dfb20 [ 23.998030] R13: 00007ffd19182fa0 R14: 00007ffd19182fd0 R15: 00007ffd19183330 [ 23.998910] [ 23.999202] [ 23.999423] Allocated by task 212: [ 23.999844] kasan_save_stack+0x22/0x50 [ 24.000352] kasan_set_track+0x25/0x30 [ 24.000862] __kasan_slab_alloc+0x59/0x70 [ 24.001384] kmem_cache_alloc+0x16b/0x370 [ 24.001915] vm_area_dup+0x20/0x160 [ 24.002373] __split_vma+0x170/0x950 [ 24.002843] split_vma+0xc6/0x110 [ 24.003280] mprotect_fixup+0x8d2/0xb30 [ 24.003784] do_mprotect_pkey+0x87e/0xd40 [ 24.004300] __x64_sys_mprotect+0x78/0xc0 [ 24.004835] do_syscall_64+0x3f/0x90 [ 24.005312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.005950] [ 24.006162] Freed by task 212: [ 24.006570] kasan_save_stack+0x22/0x50 [ 24.007069] kasan_set_track+0x25/0x30 [ 24.007568] kasan_save_free_info+0x2b/0x50 [ 24.008096] __kasan_slab_free+0x10a/0x190 [ 24.008650] kmem_cache_free+0x10d/0x4d0 [ 24.009157] rcu_core+0x8c8/0x2860 [ 24.009604] __do_softirq+0x1b7/0x7d4 [ 24.010079] [ 24.010295] Last potentially related work creation: [ 24.010888] kasan_save_stack+0x22/0x50 [ 24.011387] __kasan_record_aux_stack+0x8e/0xa0 [ 24.011979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.012632] remove_vma+0x139/0x170 [ 24.013081] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.013642] do_vmi_munmap+0x1f1/0x2b0 [ 24.014134] __vm_munmap+0x138/0x3a0 [ 24.014598] __x64_sys_munmap+0x59/0x80 [ 24.015114] do_syscall_64+0x3f/0x90 [ 24.015586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.016231] [ 24.016450] Second to last potentially related work creation: [ 24.017140] kasan_save_stack+0x22/0x50 [ 24.017650] __kasan_record_aux_stack+0x8e/0xa0 [ 24.018231] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.018892] remove_vma+0x139/0x170 [ 24.019341] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.019892] do_vmi_munmap+0x1f1/0x2b0 [ 24.020377] mmap_region+0x1f9/0x2660 [ 24.020875] do_mmap+0x854/0xf00 [ 24.021320] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.021827] ksys_mmap_pgoff+0x3af/0x500 [ 24.022328] do_syscall_64+0x3f/0x90 [ 24.022810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.023455] [ 24.023669] The buggy address belongs to the object at ffff88800d603d98 [ 24.023669] which belongs to the cache vm_area_struct of size 168 [ 24.025177] The buggy address is located 88 bytes inside of [ 24.025177] freed 168-byte region [ffff88800d603d98, ffff88800d603e40) [ 24.026601] [ 24.026818] The buggy address belongs to the physical page: [ 24.027481] page:00000000eb4027a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd603 [ 24.028591] memcg:ffff88800db75101 [ 24.029025] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.029682] page_type: 0xffffffff() [ 24.030133] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b4c00 dead000000000002 [ 24.031071] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db75101 [ 24.031984] page dumped because: kasan: bad access detected [ 24.032661] [ 24.032884] Memory state around the buggy address: [ 24.033463] ffff88800d603c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.034324] ffff88800d603d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.035176] >ffff88800d603d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.036021] ^ [ 24.036864] ffff88800d603e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.037727] ffff88800d603e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.038576] ================================================================== [ 24.039555] Disabling lock debugging due to kernel taint [ 26.528280] BUG: Bad rss-counter state mm:000000003aa842f5 type:MM_FILEPAGES val:33 [ 26.529498] BUG: Bad rss-counter state mm:000000003aa842f5 type:MM_ANONPAGES val:22 [ 26.901260] BUG: Bad rss-counter state mm:00000000e51a8813 type:MM_FILEPAGES val:33 [ 26.902231] BUG: Bad rss-counter state mm:00000000e51a8813 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12623' (ECDSA) to the list of known hosts. 2023/06/20 23:15:50 fuzzer started 2023/06/20 23:15:50 dialing manager at localhost:36067 2023/06/20 23:15:50 checking machine... 2023/06/20 23:15:50 checking revisions... [ 27.633592] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:15:50 testing simple program... [ 27.679943] cgroup: Unknown subsys name 'net' [ 27.721165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:15:49 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=0000000000000001 RCX=0000000080000100 RDX=ffff888010040000 RSI=ffffffff811431f6 RDI=0000000000000006 RBP=000000000d1081b0 RSP=ffff88806ce09d58 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000080000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000800 R14=ffffffff818d9c06 R15=ffff88800e195a00 RIP=ffffffff814c0871 RFL=00000256 [---ZAP-] 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 00007f11e0b71900 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=00007f11e0b2501c CR3=000000000eefe000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=dffffc0000000000 RBX=0000000000000ac1 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888018ebc2a0 RBP=ffff888018ebc2a0 RSP=ffff888018ab7898 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=ffff888016691b08 R14=ffff888018ebbe20 R15=ffff888018ab79d8 RIP=ffffffff812e042e RFL=00000282 [--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 00007fc558e8a700 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=00005593b0cbc290 CR3=000000000edb4000 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=2039343a35313a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a35313a3332203032 XMM08=00007fc54c0013c00000006800000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000