syzkaller login: [ 48.355659] BUG: Bad rss-counter state mm:0000000076623460 type:MM_FILEPAGES val:32 [ 48.357213] BUG: Bad rss-counter state mm:0000000076623460 type:MM_ANONPAGES val:22 [ 48.516033] ================================================================== [ 48.517128] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.518396] Read of size 8 at addr ffff88800eabfed8 by task sshd/221 [ 48.519196] [ 48.519426] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.520289] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.521305] Call Trace: [ 48.521656] [ 48.521944] dump_stack_lvl+0x91/0xf0 [ 48.522460] print_report+0xcc/0x620 [ 48.522947] ? __virt_addr_valid+0x102/0x340 [ 48.523509] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.524142] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.524774] kasan_report+0xbe/0xf0 [ 48.525258] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.525896] vma_interval_tree_remove+0xc75/0xec0 [ 48.526528] vma_prepare+0xc54/0x11a0 [ 48.527013] __split_vma+0x5af/0x950 [ 48.527499] ? __pfx___split_vma+0x10/0x10 [ 48.528052] ? find_held_lock+0x2c/0x110 [ 48.528603] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.529193] ? lock_is_held_type+0x9f/0x120 [ 48.529766] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.530406] ? mtree_range_walk+0x632/0x900 [ 48.530972] ? mas_walk+0x5c7/0x7c0 [ 48.531503] do_vmi_munmap+0x1f1/0x2b0 [ 48.532035] mmap_region+0x1f9/0x2660 [ 48.532539] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.533074] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.533826] ? __pfx_lock_acquire+0x10/0x10 [ 48.534413] ? __pfx_mmap_region+0x10/0x10 [ 48.534968] ? security_mmap_addr+0x7d/0xa0 [ 48.535528] ? get_unmapped_area+0x1f5/0x3f0 [ 48.536106] do_mmap+0x854/0xf00 [ 48.536564] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.537093] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.537688] ksys_mmap_pgoff+0x3af/0x500 [ 48.538231] do_syscall_64+0x3f/0x90 [ 48.538737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.539422] RIP: 0033:0x7f3f66f8bd82 [ 48.539907] 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 [ 48.542156] RSP: 002b:00007ffc60327ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.543132] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f66f8bd82 [ 48.544026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f663c5000 [ 48.544929] RBP: 00007f3f663c5000 R08: 0000000000000009 R09: 0000000000001000 [ 48.545826] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557abcd58b20 [ 48.546740] R13: 00007ffc60327ee0 R14: 00007ffc60327f10 R15: 00007ffc60328270 [ 48.547645] [ 48.547962] [ 48.548191] Allocated by task 214: [ 48.548647] kasan_save_stack+0x22/0x50 [ 48.549190] kasan_set_track+0x25/0x30 [ 48.549708] __kasan_slab_alloc+0x59/0x70 [ 48.550284] kmem_cache_alloc+0x16b/0x370 [ 48.550823] vm_area_dup+0x20/0x160 [ 48.551299] __split_vma+0x170/0x950 [ 48.551792] split_vma+0xc6/0x110 [ 48.552254] mprotect_fixup+0x8d2/0xb30 [ 48.552783] do_mprotect_pkey+0x87e/0xd40 [ 48.553335] __x64_sys_mprotect+0x78/0xc0 [ 48.553880] do_syscall_64+0x3f/0x90 [ 48.554387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.555069] [ 48.555293] Freed by task 214: [ 48.555703] kasan_save_stack+0x22/0x50 [ 48.556230] kasan_set_track+0x25/0x30 [ 48.556754] kasan_save_free_info+0x2b/0x50 [ 48.557311] __kasan_slab_free+0x10a/0x190 [ 48.557877] kmem_cache_free+0x10d/0x4d0 [ 48.558423] rcu_core+0x8c8/0x2860 [ 48.558885] __do_softirq+0x1b7/0x7d4 [ 48.559395] [ 48.559618] Last potentially related work creation: [ 48.560233] kasan_save_stack+0x22/0x50 [ 48.560760] __kasan_record_aux_stack+0x8e/0xa0 [ 48.561361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.562025] remove_vma+0x139/0x170 [ 48.562527] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.563114] do_vmi_munmap+0x1f1/0x2b0 [ 48.563624] __vm_munmap+0x138/0x3a0 [ 48.564113] __x64_sys_munmap+0x59/0x80 [ 48.564636] do_syscall_64+0x3f/0x90 [ 48.565128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.565792] [ 48.566014] The buggy address belongs to the object at ffff88800eabfe80 [ 48.566014] which belongs to the cache vm_area_struct of size 168 [ 48.567560] The buggy address is located 88 bytes inside of [ 48.567560] freed 168-byte region [ffff88800eabfe80, ffff88800eabff28) [ 48.569020] [ 48.569259] The buggy address belongs to the physical page: [ 48.569951] page:0000000097f82d63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeabf [ 48.571100] memcg:ffff88800dc1bc01 [ 48.571552] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.572232] page_type: 0xffffffff() [ 48.572703] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 48.573657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc1bc01 [ 48.574661] page dumped because: kasan: bad access detected [ 48.575355] [ 48.575580] Memory state around the buggy address: [ 48.576184] ffff88800eabfd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.577081] ffff88800eabfe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 48.577971] >ffff88800eabfe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.578864] ^ [ 48.579621] ffff88800eabff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 48.580548] ffff88800eabff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.581438] ================================================================== [ 48.582538] Disabling lock debugging due to kernel taint [ 50.549281] BUG: Bad rss-counter state mm:00000000b0a3f49c type:MM_FILEPAGES val:33 [ 50.550361] BUG: Bad rss-counter state mm:00000000b0a3f49c type:MM_ANONPAGES val:22 [ 51.111846] BUG: Bad rss-counter state mm:00000000ef4dae58 type:MM_FILEPAGES val:33 [ 51.113040] BUG: Bad rss-counter state mm:00000000ef4dae58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29569' (ECDSA) to the list of known hosts. 2023/06/20 00:45:43 fuzzer started 2023/06/20 00:45:43 dialing manager at localhost:44161 2023/06/20 00:45:43 checking machine... 2023/06/20 00:45:43 checking revisions... [ 51.718321] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:45:43 testing simple program... [ 51.764523] cgroup: Unknown subsys name 'net' [ 51.801564] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:45:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860ab102 RDX=ffff88800eb07a48 RSI=1ffff11001d60f48 RDI=1ffff11001d60f48 RBP=ffff88800eb07a40 RSP=ffff88800eb07978 R8 =ffffffff860ab106 R9 =ffff88800eb07a28 R10=0000000000038001 R11=0000000000009789 R12=ffff88800eb07a48 R13=ffff88800eb07a30 R14=ffff88800eb07f10 R15=ffff88800eb079e8 RIP=ffffffff811310bc RFL=00000246 [---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 00007f28a68d1900 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=00007ffe0bc63fe8 CR3=0000000019d18000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f185a757560 CR3=000000000d5a0000 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=94b05960a428dfabe8400de7c72b677d XMM02=000000000011cba8eff9b2d0a8fce9cb XMM03=000000000011cc782c67c8bc2e329bc3 XMM04=7037a64664383f6d00000000000ae988 XMM05=2f40c16de6c9374b00000000001340b0 XMM06=c291bd5c70af25b90000000000133aa8 XMM07=e042d86d42eb936e0000000000124338 XMM08=c992020decfe8453000000000011cc78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000