syzkaller login: [ 30.895178] BUG: Bad rss-counter state mm:000000001b7020ed type:MM_FILEPAGES val:33 [ 30.896522] BUG: Bad rss-counter state mm:000000001b7020ed type:MM_ANONPAGES val:22 [ 30.932104] ================================================================== [ 30.933187] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.934243] Read of size 8 at addr ffff888015acc310 by task sshd/220 [ 30.935119] [ 30.935420] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.936385] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.937510] Call Trace: [ 30.937874] [ 30.938180] dump_stack_lvl+0x91/0xf0 [ 30.938719] print_report+0xcc/0x620 [ 30.939312] ? __virt_addr_valid+0x102/0x340 [ 30.939938] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.940650] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.941329] kasan_report+0xbe/0xf0 [ 30.941846] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.942476] vma_interval_tree_remove+0xc75/0xec0 [ 30.943124] vma_prepare+0xc54/0x11a0 [ 30.943680] __split_vma+0x5af/0x950 [ 30.944151] ? __pfx___split_vma+0x10/0x10 [ 30.944693] ? find_held_lock+0x2c/0x110 [ 30.945214] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.945780] ? lock_is_held_type+0x9f/0x120 [ 30.946313] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.946914] ? mtree_range_walk+0x632/0x900 [ 30.947465] ? mas_walk+0x5c7/0x7c0 [ 30.947938] do_vmi_munmap+0x1f1/0x2b0 [ 30.948442] mmap_region+0x1f9/0x2660 [ 30.948932] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.949444] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.950152] ? __pfx_lock_acquire+0x10/0x10 [ 30.950680] ? __pfx_mmap_region+0x10/0x10 [ 30.951205] ? security_mmap_addr+0x7d/0xa0 [ 30.951731] ? get_unmapped_area+0x1f5/0x3f0 [ 30.952278] do_mmap+0x854/0xf00 [ 30.952740] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.953230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.953791] ksys_mmap_pgoff+0x3af/0x500 [ 30.954299] do_syscall_64+0x3f/0x90 [ 30.954778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.955420] RIP: 0033:0x7f2bf9ad9d82 [ 30.955879] 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 [ 30.958008] RSP: 002b:00007fff39a39838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.958914] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2bf9ad9d82 [ 30.959767] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2bf8f13000 [ 30.960652] RBP: 00007f2bf8f13000 R08: 0000000000000009 R09: 0000000000001000 [ 30.961514] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4f4098ec0 [ 30.962382] R13: 00007fff39a39850 R14: 00007fff39a39880 R15: 00007fff39a39be0 [ 30.963249] [ 30.963549] [ 30.963763] Allocated by task 213: [ 30.964188] kasan_save_stack+0x22/0x50 [ 30.964700] kasan_set_track+0x25/0x30 [ 30.965188] __kasan_slab_alloc+0x59/0x70 [ 30.965718] kmem_cache_alloc+0x16b/0x370 [ 30.966240] vm_area_dup+0x20/0x160 [ 30.966698] __split_vma+0x170/0x950 [ 30.967161] split_vma+0xc6/0x110 [ 30.967596] mprotect_fixup+0x8d2/0xb30 [ 30.968096] do_mprotect_pkey+0x87e/0xd40 [ 30.968635] __x64_sys_mprotect+0x78/0xc0 [ 30.969153] do_syscall_64+0x3f/0x90 [ 30.969632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.970266] [ 30.970483] Freed by task 213: [ 30.970872] kasan_save_stack+0x22/0x50 [ 30.971376] kasan_set_track+0x25/0x30 [ 30.971874] kasan_save_free_info+0x2b/0x50 [ 30.972416] __kasan_slab_free+0x10a/0x190 [ 30.972961] kmem_cache_free+0x10d/0x4d0 [ 30.973466] rcu_core+0x8c8/0x2860 [ 30.973911] __do_softirq+0x1b7/0x7d4 [ 30.974385] [ 30.974597] Last potentially related work creation: [ 30.975187] kasan_save_stack+0x22/0x50 [ 30.975689] __kasan_record_aux_stack+0x8e/0xa0 [ 30.976259] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.976903] remove_vma+0x139/0x170 [ 30.977436] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.977993] do_vmi_munmap+0x1f1/0x2b0 [ 30.978477] __vm_munmap+0x138/0x3a0 [ 30.978940] __x64_sys_munmap+0x59/0x80 [ 30.979431] do_syscall_64+0x3f/0x90 [ 30.979906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.980561] [ 30.980773] The buggy address belongs to the object at ffff888015acc2b8 [ 30.980773] which belongs to the cache vm_area_struct of size 168 [ 30.982229] The buggy address is located 88 bytes inside of [ 30.982229] freed 168-byte region [ffff888015acc2b8, ffff888015acc360) [ 30.983641] [ 30.983855] The buggy address belongs to the physical page: [ 30.984530] page:0000000014a3fbca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15acc [ 30.985623] memcg:ffff88800e3cfa01 [ 30.986062] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.986766] page_type: 0xffffffff() [ 30.987220] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.988142] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3cfa01 [ 30.989074] page dumped because: kasan: bad access detected [ 30.989737] [ 30.989952] Memory state around the buggy address: [ 30.990529] ffff888015acc200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.991387] ffff888015acc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.992239] >ffff888015acc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.993096] ^ [ 30.993563] ffff888015acc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.994424] ffff888015acc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.995267] ================================================================== [ 30.996192] Disabling lock debugging due to kernel taint [ 33.271790] BUG: Bad rss-counter state mm:0000000051cc32aa type:MM_FILEPAGES val:33 [ 33.272780] BUG: Bad rss-counter state mm:0000000051cc32aa type:MM_ANONPAGES val:22 [ 33.669684] BUG: Bad rss-counter state mm:00000000a1b46c2c type:MM_FILEPAGES val:33 [ 33.670915] BUG: Bad rss-counter state mm:00000000a1b46c2c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47987' (ECDSA) to the list of known hosts. 2023/06/20 18:00:43 fuzzer started 2023/06/20 18:00:43 dialing manager at localhost:36067 2023/06/20 18:00:43 checking machine... 2023/06/20 18:00:43 checking revisions... [ 34.346300] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:00:43 testing simple program... [ 34.391931] cgroup: Unknown subsys name 'net' [ 34.438090] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:00:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800da4dac8 RCX=0000000000000000 RDX=ffff88801021b680 RSI=ffffffff8386ef54 RDI=ffffffff85d3d350 RBP=ffff88801ca17d90 RSP=ffff88801ca17c98 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffed1001b49b59 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000200 RIP=ffffffff8386ef54 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 00007f14374d1900 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=00007f1437a88618 CR3=000000000cc5a000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f1fae0993d0 CR3=000000000ec62000 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=1532be642518f2a04145804b7bcb1a29 XMM02=ec2efd57dc4c00df000000000011acb0 XMM03=9fb9717d410f3efa000000000011ad80 XMM04=fb96155d7c0facff00000000000ae988 XMM05=19e9129bd510f23500000000001323f8 XMM06=a0d527efb365b4950000000000131260 XMM07=e042d86d42eb936e0000000000122810 XMM08=9fb9717d410f3efa000000000011ad80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000