syzkaller login: [ 33.810103] BUG: Bad rss-counter state mm:00000000cf6ffbea type:MM_FILEPAGES val:33 [ 33.811305] BUG: Bad rss-counter state mm:00000000cf6ffbea type:MM_ANONPAGES val:22 [ 33.982680] ================================================================== [ 33.983557] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.984597] Read of size 8 at addr ffff88800d808df0 by task sshd/221 [ 33.985351] [ 33.985570] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.986421] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.987410] Call Trace: [ 33.987732] [ 33.988018] dump_stack_lvl+0x91/0xf0 [ 33.988508] print_report+0xcc/0x620 [ 33.988987] ? __virt_addr_valid+0x102/0x340 [ 33.989561] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.990181] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.990792] kasan_report+0xbe/0xf0 [ 33.991275] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.991899] vma_interval_tree_remove+0xc75/0xec0 [ 33.992504] vma_prepare+0xc54/0x11a0 [ 33.992990] __split_vma+0x5af/0x950 [ 33.993489] ? __pfx___split_vma+0x10/0x10 [ 33.994019] ? find_held_lock+0x2c/0x110 [ 33.994544] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.995123] ? lock_is_held_type+0x9f/0x120 [ 33.995668] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.996279] ? mtree_range_walk+0x632/0x900 [ 33.996826] ? mas_walk+0x5c7/0x7c0 [ 33.997313] do_vmi_munmap+0x1f1/0x2b0 [ 33.997808] mmap_region+0x1f9/0x2660 [ 33.998292] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.998799] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.999519] ? __pfx_lock_acquire+0x10/0x10 [ 34.000056] ? __pfx_mmap_region+0x10/0x10 [ 34.000607] ? security_mmap_addr+0x7d/0xa0 [ 34.001245] ? get_unmapped_area+0x1f5/0x3f0 [ 34.001876] do_mmap+0x854/0xf00 [ 34.002381] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.002946] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.003585] ksys_mmap_pgoff+0x3af/0x500 [ 34.004172] do_syscall_64+0x3f/0x90 [ 34.004717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.005477] RIP: 0033:0x7fa1ff733d82 [ 34.005997] 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 [ 34.008451] RSP: 002b:00007ffe6f3f77a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.009510] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1ff733d82 [ 34.010494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1feb6d000 [ 34.011455] RBP: 00007fa1feb6d000 R08: 0000000000000009 R09: 0000000000001000 [ 34.012426] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558eb85fef70 [ 34.013395] R13: 00007ffe6f3f77c0 R14: 00007ffe6f3f77f0 R15: 00007ffe6f3f7b50 [ 34.014536] [ 34.014874] [ 34.015131] Allocated by task 214: [ 34.015640] kasan_save_stack+0x22/0x50 [ 34.016239] kasan_set_track+0x25/0x30 [ 34.016829] __kasan_slab_alloc+0x59/0x70 [ 34.017443] kmem_cache_alloc+0x16b/0x370 [ 34.018057] vm_area_dup+0x20/0x160 [ 34.018600] __split_vma+0x170/0x950 [ 34.019158] split_vma+0xc6/0x110 [ 34.019672] mprotect_fixup+0x8d2/0xb30 [ 34.020263] do_mprotect_pkey+0x87e/0xd40 [ 34.020873] __x64_sys_mprotect+0x78/0xc0 [ 34.021503] do_syscall_64+0x3f/0x90 [ 34.022072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.022845] [ 34.023098] Freed by task 214: [ 34.023559] kasan_save_stack+0x22/0x50 [ 34.024153] kasan_set_track+0x25/0x30 [ 34.024737] kasan_save_free_info+0x2b/0x50 [ 34.025379] __kasan_slab_free+0x10a/0x190 [ 34.026013] kmem_cache_free+0x10d/0x4d0 [ 34.026606] rcu_core+0x8c8/0x2860 [ 34.027126] __do_softirq+0x1b7/0x7d4 [ 34.027722] [ 34.027974] Last potentially related work creation: [ 34.028648] kasan_save_stack+0x22/0x50 [ 34.029262] __kasan_record_aux_stack+0x8e/0xa0 [ 34.029924] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.030656] remove_vma+0x139/0x170 [ 34.031191] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.031850] do_vmi_munmap+0x1f1/0x2b0 [ 34.032417] __vm_munmap+0x138/0x3a0 [ 34.032961] __x64_sys_munmap+0x59/0x80 [ 34.033555] do_syscall_64+0x3f/0x90 [ 34.034117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.034876] [ 34.035120] The buggy address belongs to the object at ffff88800d808d98 [ 34.035120] which belongs to the cache vm_area_struct of size 168 [ 34.036824] The buggy address is located 88 bytes inside of [ 34.036824] freed 168-byte region [ffff88800d808d98, ffff88800d808e40) [ 34.038498] [ 34.038746] The buggy address belongs to the physical page: [ 34.039499] page:00000000ee2a5e4d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd808 [ 34.040773] memcg:ffff88800ffdba01 [ 34.041270] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.042013] page_type: 0xffffffff() [ 34.042533] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.043596] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ffdba01 [ 34.044650] page dumped because: kasan: bad access detected [ 34.045427] [ 34.045676] Memory state around the buggy address: [ 34.046358] ffff88800d808c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.047360] ffff88800d808d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.048373] >ffff88800d808d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.049366] ^ [ 34.050323] ffff88800d808e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.051314] ffff88800d808e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.052298] ================================================================== [ 34.053388] Disabling lock debugging due to kernel taint [ 35.928633] BUG: Bad rss-counter state mm:000000003adf01de type:MM_FILEPAGES val:33 [ 35.929434] BUG: Bad rss-counter state mm:000000003adf01de type:MM_ANONPAGES val:22 [ 36.404189] BUG: Bad rss-counter state mm:00000000a2e68129 type:MM_FILEPAGES val:33 [ 36.405328] BUG: Bad rss-counter state mm:00000000a2e68129 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29085' (ECDSA) to the list of known hosts. 2023/06/19 11:35:36 fuzzer started 2023/06/19 11:35:36 dialing manager at localhost:44161 2023/06/19 11:35:36 checking machine... 2023/06/19 11:35:36 checking revisions... [ 37.160500] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:35:36 testing simple program... [ 37.210197] cgroup: Unknown subsys name 'net' [ 37.248423] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:35:33 Registers: info registers vcpu 0 RAX=1ffff11001c23cab RBX=ffff88800e11e528 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e11e558 RBP=ffff888015c70000 RSP=ffff888008d7fcb8 R8 =0000000000000001 R9 =ffffed10011aff8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888015c72bc0 R14=ffffffff813782a8 R15=ffff88800f24f780 RIP=ffffffff81846362 RFL=00000046 [---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 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=00007ffe1f8f2000 CR3=000000000f082000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002008e8a RSP=ffff888010047440 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000ae200000ae2 R12=ffffffff8560b640 R13=ffffffff83ab421f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff812d86a2 RFL=00000247 [---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 00007f756da7d900 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=00007f97a6e47460 CR3=000000000f082000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000