syzkaller login: [ 30.683924] BUG: Bad rss-counter state mm:00000000c3a4e11b type:MM_FILEPAGES val:33 [ 30.684948] BUG: Bad rss-counter state mm:00000000c3a4e11b type:MM_ANONPAGES val:22 [ 30.725677] ================================================================== [ 30.726919] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.727916] Read of size 8 at addr ffff88800f10cc20 by task sshd/221 [ 30.728818] [ 30.729058] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.729923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.730897] Call Trace: [ 30.731207] [ 30.731502] dump_stack_lvl+0x91/0xf0 [ 30.732020] print_report+0xcc/0x620 [ 30.732595] ? __virt_addr_valid+0x102/0x340 [ 30.733180] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.733773] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.734369] kasan_report+0xbe/0xf0 [ 30.734884] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.735498] vma_interval_tree_remove+0xc75/0xec0 [ 30.736081] vma_prepare+0xc54/0x11a0 [ 30.736545] __split_vma+0x5af/0x950 [ 30.736998] ? __pfx___split_vma+0x10/0x10 [ 30.737520] ? find_held_lock+0x2c/0x110 [ 30.738024] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.738584] ? lock_is_held_type+0x9f/0x120 [ 30.739114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.739706] ? mtree_range_walk+0x632/0x900 [ 30.740273] ? mas_walk+0x5c7/0x7c0 [ 30.740735] do_vmi_munmap+0x1f1/0x2b0 [ 30.741218] mmap_region+0x1f9/0x2660 [ 30.741691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.742188] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.742883] ? __pfx_lock_acquire+0x10/0x10 [ 30.743400] ? __pfx_mmap_region+0x10/0x10 [ 30.743916] ? security_mmap_addr+0x7d/0xa0 [ 30.744427] ? get_unmapped_area+0x1f5/0x3f0 [ 30.744956] do_mmap+0x854/0xf00 [ 30.745381] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.745861] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.746402] ksys_mmap_pgoff+0x3af/0x500 [ 30.746908] do_syscall_64+0x3f/0x90 [ 30.747371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748003] RIP: 0033:0x7f0cbed3ed82 [ 30.748446] 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 [ 30.750504] RSP: 002b:00007ffed7b62ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.751385] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0cbed3ed82 [ 30.752202] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0cbe178000 [ 30.753016] RBP: 00007f0cbe178000 R08: 0000000000000009 R09: 0000000000001000 [ 30.753841] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562097b83f70 [ 30.754663] R13: 00007ffed7b62ee0 R14: 00007ffed7b62f10 R15: 00007ffed7b63270 [ 30.755502] [ 30.755787] [ 30.755995] Allocated by task 214: [ 30.756410] kasan_save_stack+0x22/0x50 [ 30.756896] kasan_set_track+0x25/0x30 [ 30.757375] __kasan_slab_alloc+0x59/0x70 [ 30.757881] kmem_cache_alloc+0x16b/0x370 [ 30.758382] vm_area_dup+0x20/0x160 [ 30.758893] __split_vma+0x170/0x950 [ 30.759361] split_vma+0xc6/0x110 [ 30.759788] mprotect_fixup+0x8d2/0xb30 [ 30.760285] do_mprotect_pkey+0x87e/0xd40 [ 30.760796] __x64_sys_mprotect+0x78/0xc0 [ 30.761299] do_syscall_64+0x3f/0x90 [ 30.761761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.762390] [ 30.762606] Freed by task 13: [ 30.762981] kasan_save_stack+0x22/0x50 [ 30.763474] kasan_set_track+0x25/0x30 [ 30.763955] kasan_save_free_info+0x2b/0x50 [ 30.764471] __kasan_slab_free+0x10a/0x190 [ 30.764988] kmem_cache_free+0x10d/0x4d0 [ 30.765485] rcu_core+0x8c8/0x2860 [ 30.765918] __do_softirq+0x1b7/0x7d4 [ 30.766387] [ 30.766612] Last potentially related work creation: [ 30.767179] kasan_save_stack+0x22/0x50 [ 30.767668] __kasan_record_aux_stack+0x8e/0xa0 [ 30.768228] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.768855] remove_vma+0x139/0x170 [ 30.769330] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.769872] do_vmi_munmap+0x1f1/0x2b0 [ 30.770348] __vm_munmap+0x138/0x3a0 [ 30.770809] __x64_sys_munmap+0x59/0x80 [ 30.771294] do_syscall_64+0x3f/0x90 [ 30.771754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772381] [ 30.772591] The buggy address belongs to the object at ffff88800f10cbc8 [ 30.772591] which belongs to the cache vm_area_struct of size 168 [ 30.774020] The buggy address is located 88 bytes inside of [ 30.774020] freed 168-byte region [ffff88800f10cbc8, ffff88800f10cc70) [ 30.775401] [ 30.775614] The buggy address belongs to the physical page: [ 30.776255] page:0000000034343acb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf10c [ 30.777307] memcg:ffff88800973f101 [ 30.777722] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.778353] page_type: 0xffffffff() [ 30.778803] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.779699] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800973f101 [ 30.780579] page dumped because: kasan: bad access detected [ 30.781221] [ 30.781431] Memory state around the buggy address: [ 30.781992] ffff88800f10cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.782845] ffff88800f10cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.783681] >ffff88800f10cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.784510] ^ [ 30.785029] ffff88800f10cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.785866] ffff88800f10cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.786698] ================================================================== [ 30.787583] Disabling lock debugging due to kernel taint [ 32.638577] BUG: Bad rss-counter state mm:000000005b2bba63 type:MM_FILEPAGES val:33 [ 32.639285] BUG: Bad rss-counter state mm:000000005b2bba63 type:MM_ANONPAGES val:22 [ 33.122430] BUG: Bad rss-counter state mm:00000000c2b8d187 type:MM_FILEPAGES val:33 [ 33.123650] BUG: Bad rss-counter state mm:00000000c2b8d187 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38907' (ECDSA) to the list of known hosts. 2023/06/20 23:47:35 fuzzer started 2023/06/20 23:47:35 dialing manager at localhost:36067 2023/06/20 23:47:35 checking machine... 2023/06/20 23:47:35 checking revisions... [ 33.860828] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:47:35 testing simple program... [ 33.908765] cgroup: Unknown subsys name 'net' [ 33.946595] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:47:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed1002d3df46 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000040 RDI=ffff8880169efac0 RBP=ffff8880087b83c0 RSP=ffff8880169efa30 R8 =ffff888015de3300 R9 =0000000000000000 R10=ffffed1002bbc660 R11=0000000000000000 R12=0000000000000cc0 R13=0000000000000cc0 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff813ad6d2 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 00007f1de19fb900 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=00007f1de1fb30b0 CR3=000000000e424000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fd18fc4f560 CR3=000000000c6f8000 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=4602d5e7405550a24244170eded54903 XMM02=2c67c8bc2e329bc3000000000011d538 XMM03=fb795ef6d65770560000000000121bc8 XMM04=aa83ca8920b46e6100000000000ae988 XMM05=e4cb8bb95a7664b60000000000131988 XMM06=0f5c0a0df59a720a00000000001307f0 XMM07=e042d86d42eb936e0000000000121e48 XMM08=27cf9c0a28424ec3000000000011d598 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000