syzkaller login: [ 38.761510] BUG: Bad rss-counter state mm:000000008ac0aed0 type:MM_FILEPAGES val:33 [ 38.763029] BUG: Bad rss-counter state mm:000000008ac0aed0 type:MM_ANONPAGES val:22 [ 38.919536] ================================================================== [ 38.920574] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.921630] Read of size 8 at addr ffff88800c5dfed8 by task sshd/219 [ 38.922584] [ 38.922827] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.923828] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.924918] Call Trace: [ 38.925275] [ 38.925602] dump_stack_lvl+0x91/0xf0 [ 38.926160] print_report+0xcc/0x620 [ 38.926702] ? __virt_addr_valid+0x102/0x340 [ 38.927332] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.928027] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.928727] kasan_report+0xbe/0xf0 [ 38.929269] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.929984] vma_interval_tree_remove+0xc75/0xec0 [ 38.930676] vma_prepare+0xc54/0x11a0 [ 38.931223] __split_vma+0x5af/0x950 [ 38.931785] ? __pfx___split_vma+0x10/0x10 [ 38.932391] ? find_held_lock+0x2c/0x110 [ 38.932997] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.933643] ? lock_is_held_type+0x9f/0x120 [ 38.934259] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.934961] ? mtree_range_walk+0x632/0x900 [ 38.935614] ? mas_walk+0x5c7/0x7c0 [ 38.936163] do_vmi_munmap+0x1f1/0x2b0 [ 38.936734] mmap_region+0x1f9/0x2660 [ 38.937293] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.937880] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.938703] ? __pfx_lock_acquire+0x10/0x10 [ 38.939322] ? __pfx_mmap_region+0x10/0x10 [ 38.939940] ? security_mmap_addr+0x7d/0xa0 [ 38.940564] ? get_unmapped_area+0x1f5/0x3f0 [ 38.941190] do_mmap+0x854/0xf00 [ 38.941693] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.942263] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.942922] ksys_mmap_pgoff+0x3af/0x500 [ 38.943508] do_syscall_64+0x3f/0x90 [ 38.944081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.944832] RIP: 0033:0x7f7a5f511d82 [ 38.945363] 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 [ 38.947849] RSP: 002b:00007fff18b32ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.948897] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a5f511d82 [ 38.949867] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a5e94b000 [ 38.950846] RBP: 00007f7a5e94b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.951842] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de8682eb20 [ 38.952822] R13: 00007fff18b32ad0 R14: 00007fff18b32b00 R15: 00007fff18b32e60 [ 38.953815] [ 38.954155] [ 38.954403] Allocated by task 212: [ 38.954906] kasan_save_stack+0x22/0x50 [ 38.955479] kasan_set_track+0x25/0x30 [ 38.956076] __kasan_slab_alloc+0x59/0x70 [ 38.956679] kmem_cache_alloc+0x16b/0x370 [ 38.957275] vm_area_dup+0x20/0x160 [ 38.957794] __split_vma+0x170/0x950 [ 38.958333] split_vma+0xc6/0x110 [ 38.958843] mprotect_fixup+0x8d2/0xb30 [ 38.959419] do_mprotect_pkey+0x87e/0xd40 [ 38.960033] __x64_sys_mprotect+0x78/0xc0 [ 38.960639] do_syscall_64+0x3f/0x90 [ 38.961182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.961931] [ 38.962205] Freed by task 203: [ 38.962660] kasan_save_stack+0x22/0x50 [ 38.963244] kasan_set_track+0x25/0x30 [ 38.963819] kasan_save_free_info+0x2b/0x50 [ 38.964433] __kasan_slab_free+0x10a/0x190 [ 38.965040] kmem_cache_free+0x10d/0x4d0 [ 38.965623] rcu_core+0x8c8/0x2860 [ 38.966143] __do_softirq+0x1b7/0x7d4 [ 38.966699] [ 38.966945] Last potentially related work creation: [ 38.967648] kasan_save_stack+0x22/0x50 [ 38.968227] __kasan_record_aux_stack+0x8e/0xa0 [ 38.968896] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.969642] remove_vma+0x139/0x170 [ 38.970145] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.970780] do_vmi_munmap+0x1f1/0x2b0 [ 38.971331] __vm_munmap+0x138/0x3a0 [ 38.971865] __x64_sys_munmap+0x59/0x80 [ 38.972423] do_syscall_64+0x3f/0x90 [ 38.972955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.973675] [ 38.973912] The buggy address belongs to the object at ffff88800c5dfe80 [ 38.973912] which belongs to the cache vm_area_struct of size 168 [ 38.975589] The buggy address is located 88 bytes inside of [ 38.975589] freed 168-byte region [ffff88800c5dfe80, ffff88800c5dff28) [ 38.977158] [ 38.977403] The buggy address belongs to the physical page: [ 38.978147] page:000000006d5a68af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5df [ 38.979356] memcg:ffff888013f0c901 [ 38.979845] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.980591] page_type: 0xffffffff() [ 38.981113] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aae40 dead000000000008 [ 38.982174] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f0c901 [ 38.983224] page dumped because: kasan: bad access detected [ 38.984018] [ 38.984267] Memory state around the buggy address: [ 38.984931] ffff88800c5dfd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.985928] ffff88800c5dfe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.986913] >ffff88800c5dfe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.987909] ^ [ 38.988758] ffff88800c5dff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.989748] ffff88800c5dff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.990740] ================================================================== [ 38.992211] Disabling lock debugging due to kernel taint [ 40.912716] BUG: Bad rss-counter state mm:000000000c0f266a type:MM_FILEPAGES val:33 [ 40.913898] BUG: Bad rss-counter state mm:000000000c0f266a type:MM_ANONPAGES val:22 [ 41.354000] BUG: Bad rss-counter state mm:00000000340275e7 type:MM_FILEPAGES val:33 [ 41.355183] BUG: Bad rss-counter state mm:00000000340275e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36537' (ECDSA) to the list of known hosts. 2023/06/21 01:32:12 fuzzer started 2023/06/21 01:32:12 dialing manager at localhost:36067 2023/06/21 01:32:12 checking machine... 2023/06/21 01:32:12 checking revisions... [ 42.091363] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:32:12 testing simple program... [ 42.144524] cgroup: Unknown subsys name 'net' [ 42.201255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:32:12 Registers: info registers vcpu 0 RAX=1ffff11001b717d5 RBX=ffff8880195ca198 RCX=1ffff110012f8f1e RDX=1ffff110034b960d RSI=ffffffff87b89f80 RDI=ffff88800dd62668 RBP=ffff88800dd62658 RSP=ffff888017dafc28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800e2968b8 R13=dffffc0000000000 R14=ffff88800db8bea8 R15=ffff88801a5cb000 RIP=ffffffff844d3e82 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 00007f9b81cd9900 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=00007f9b82290618 CR3=0000000015ca0000 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=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=ffff888008c04400 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=00007f336a9f0810 CR3=000000000c692000 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=941873ed600b5ca4a2428ed157d04bdd XMM02=000000000011b830ec2efd57dc4c00df XMM03=00000000001221d0da372910e1c9033e XMM04=43b3ea2014e6850b00000000000ae988 XMM05=fc0b33dd298b90560000000000132ea0 XMM06=806171799158d9670000000000131bd0 XMM07=e042d86d42eb936e00000000001224a8 XMM08=da372910e1c9033e000000000011b890 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000