syzkaller login: [ 30.811324] BUG: Bad rss-counter state mm:00000000e0cbb1db type:MM_FILEPAGES val:33 [ 30.812066] BUG: Bad rss-counter state mm:00000000e0cbb1db type:MM_ANONPAGES val:22 [ 30.951651] ================================================================== [ 30.952776] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.953936] Read of size 8 at addr ffff88801599ddf0 by task sshd/221 [ 30.955080] [ 30.955347] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.956074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.956888] Call Trace: [ 30.957144] [ 30.957369] dump_stack_lvl+0x91/0xf0 [ 30.957757] print_report+0xcc/0x620 [ 30.958156] ? __virt_addr_valid+0x102/0x340 [ 30.958624] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.959134] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.959620] kasan_report+0xbe/0xf0 [ 30.960007] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.960508] vma_interval_tree_remove+0xc75/0xec0 [ 30.960985] vma_prepare+0xc54/0x11a0 [ 30.961362] __split_vma+0x5af/0x950 [ 30.961745] ? __pfx___split_vma+0x10/0x10 [ 30.962174] ? find_held_lock+0x2c/0x110 [ 30.962611] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.963059] ? lock_is_held_type+0x9f/0x120 [ 30.963497] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.964008] ? mtree_range_walk+0x632/0x900 [ 30.964463] ? mas_walk+0x5c7/0x7c0 [ 30.964836] do_vmi_munmap+0x1f1/0x2b0 [ 30.965231] mmap_region+0x1f9/0x2660 [ 30.965613] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.966039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.966636] ? __pfx_lock_acquire+0x10/0x10 [ 30.967067] ? __pfx_mmap_region+0x10/0x10 [ 30.967497] ? security_mmap_addr+0x7d/0xa0 [ 30.967925] ? get_unmapped_area+0x1f5/0x3f0 [ 30.968377] do_mmap+0x854/0xf00 [ 30.968741] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.969131] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.969586] ksys_mmap_pgoff+0x3af/0x500 [ 30.969997] do_syscall_64+0x3f/0x90 [ 30.970386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.970918] RIP: 0033:0x7ff68bd06d82 [ 30.971281] 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 [ 30.973014] RSP: 002b:00007fff694befa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.973753] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff68bd06d82 [ 30.974456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff68b140000 [ 30.975164] RBP: 00007ff68b140000 R08: 0000000000000009 R09: 0000000000001000 [ 30.975858] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632af6d1ec0 [ 30.976549] R13: 00007fff694befc0 R14: 00007fff694beff0 R15: 00007fff694bf350 [ 30.977261] [ 30.977502] [ 30.977676] Allocated by task 214: [ 30.978023] kasan_save_stack+0x22/0x50 [ 30.978432] kasan_set_track+0x25/0x30 [ 30.978821] __kasan_slab_alloc+0x59/0x70 [ 30.979234] kmem_cache_alloc+0x16b/0x370 [ 30.979654] vm_area_dup+0x20/0x160 [ 30.980040] __split_vma+0x170/0x950 [ 30.980418] split_vma+0xc6/0x110 [ 30.980766] mprotect_fixup+0x8d2/0xb30 [ 30.981168] do_mprotect_pkey+0x87e/0xd40 [ 30.981596] __x64_sys_mprotect+0x78/0xc0 [ 30.982027] do_syscall_64+0x3f/0x90 [ 30.982419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.982945] [ 30.983107] Freed by task 214: [ 30.983426] kasan_save_stack+0x22/0x50 [ 30.983830] kasan_set_track+0x25/0x30 [ 30.984232] kasan_save_free_info+0x2b/0x50 [ 30.984662] __kasan_slab_free+0x10a/0x190 [ 30.985090] kmem_cache_free+0x10d/0x4d0 [ 30.985498] rcu_core+0x8c8/0x2860 [ 30.985855] __do_softirq+0x1b7/0x7d4 [ 30.986238] [ 30.986425] Last potentially related work creation: [ 30.986891] kasan_save_stack+0x22/0x50 [ 30.987296] __kasan_record_aux_stack+0x8e/0xa0 [ 30.987783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.988291] remove_vma+0x139/0x170 [ 30.988657] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.989099] do_vmi_munmap+0x1f1/0x2b0 [ 30.989504] __vm_munmap+0x138/0x3a0 [ 30.989884] __x64_sys_munmap+0x59/0x80 [ 30.990299] do_syscall_64+0x3f/0x90 [ 30.990682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.991213] [ 30.991387] The buggy address belongs to the object at ffff88801599dd98 [ 30.991387] which belongs to the cache vm_area_struct of size 168 [ 30.992608] The buggy address is located 88 bytes inside of [ 30.992608] freed 168-byte region [ffff88801599dd98, ffff88801599de40) [ 30.993777] [ 30.993946] The buggy address belongs to the physical page: [ 30.994513] page:000000002a3a1335 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1599d [ 30.995436] memcg:ffff88801599c001 [ 30.995840] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.996408] page_type: 0xffffffff() [ 30.996783] raw: 0100000000000200 ffff8880087a0c80 ffffea0000566780 dead000000000006 [ 30.997542] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801599c001 [ 30.998305] page dumped because: kasan: bad access detected [ 30.998849] [ 30.999023] Memory state around the buggy address: [ 30.999504] ffff88801599dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.000213] ffff88801599dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.000901] >ffff88801599dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.001587] ^ [ 31.002263] ffff88801599de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.002972] ffff88801599de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.003641] ================================================================== [ 31.004456] Disabling lock debugging due to kernel taint [ 32.830724] BUG: Bad rss-counter state mm:00000000b2e7590b type:MM_FILEPAGES val:33 [ 32.831752] BUG: Bad rss-counter state mm:00000000b2e7590b type:MM_ANONPAGES val:22 [ 33.393148] BUG: Bad rss-counter state mm:00000000c2511c00 type:MM_FILEPAGES val:33 [ 33.394433] BUG: Bad rss-counter state mm:00000000c2511c00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16610' (ECDSA) to the list of known hosts. 2023/06/20 21:01:25 fuzzer started 2023/06/20 21:01:25 dialing manager at localhost:36067 2023/06/20 21:01:25 checking machine... 2023/06/20 21:01:25 checking revisions... [ 34.058622] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:01:25 testing simple program... [ 34.115077] cgroup: Unknown subsys name 'net' [ 34.179330] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:01:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801669fc48 RCX=ffffffff860d8201 RDX=0000000000000000 RSI=ffffffff81846194 RDI=ffff88801669fc54 RBP=0000000000000000 RSP=ffff88801669fb60 R8 =ffffffff860d825a R9 =ffff88801669fbc0 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801669fc48 R13=0000000000000000 R14=ffff8880169c8000 R15=ffff8880090e7ab0 RIP=ffffffff813ad4ee RFL=00000213 [----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 00007f7ecfcfa900 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=00007f7ecfcae01c CR3=000000000f2c8000 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=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=000055b8afc5dfe0 CR3=0000000016a8c000 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=2035323a31303a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31303a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000