syzkaller login: [ 105.724072] BUG: Bad rss-counter state mm:0000000035f5b206 type:MM_FILEPAGES val:33 [ 105.725277] BUG: Bad rss-counter state mm:0000000035f5b206 type:MM_ANONPAGES val:22 [ 105.878760] ================================================================== [ 105.879619] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 105.880503] Read of size 8 at addr ffff8880199ad6b0 by task sshd/219 [ 105.881375] [ 105.881607] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 105.882613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 105.883527] Call Trace: [ 105.883832] [ 105.884108] dump_stack_lvl+0x91/0xf0 [ 105.884578] print_report+0xcc/0x620 [ 105.885045] ? __virt_addr_valid+0x102/0x340 [ 105.885568] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.886201] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.886784] kasan_report+0xbe/0xf0 [ 105.887238] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.887829] vma_interval_tree_remove+0xc75/0xec0 [ 105.888417] vma_prepare+0xc54/0x11a0 [ 105.888890] __split_vma+0x5af/0x950 [ 105.889355] ? __pfx___split_vma+0x10/0x10 [ 105.889927] ? find_held_lock+0x2c/0x110 [ 105.890434] do_vmi_align_munmap+0x2ba/0x11f0 [ 105.891001] ? lock_is_held_type+0x9f/0x120 [ 105.891527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 105.892128] ? mtree_range_walk+0x632/0x900 [ 105.892660] ? mas_walk+0x5c7/0x7c0 [ 105.893135] do_vmi_munmap+0x1f1/0x2b0 [ 105.893626] mmap_region+0x1f9/0x2660 [ 105.894141] ? vm_mmap_pgoff+0x15c/0x3a0 [ 105.894648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 105.895367] ? __pfx_lock_acquire+0x10/0x10 [ 105.895890] ? __pfx_mmap_region+0x10/0x10 [ 105.896394] ? security_mmap_addr+0x7d/0xa0 [ 105.896899] ? get_unmapped_area+0x1f5/0x3f0 [ 105.897423] do_mmap+0x854/0xf00 [ 105.897864] vm_mmap_pgoff+0x1a6/0x3a0 [ 105.898348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 105.898886] ksys_mmap_pgoff+0x3af/0x500 [ 105.899377] do_syscall_64+0x3f/0x90 [ 105.899831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.900445] RIP: 0033:0x7f23ad371d82 [ 105.900880] 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 [ 105.902914] RSP: 002b:00007ffe04854418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 105.903767] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23ad371d82 [ 105.904571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23ac7ab000 [ 105.905397] RBP: 00007f23ac7ab000 R08: 0000000000000009 R09: 0000000000001000 [ 105.906279] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609b4735f70 [ 105.907117] R13: 00007ffe04854430 R14: 00007ffe04854460 R15: 00007ffe048547c0 [ 105.907964] [ 105.908253] [ 105.908467] Allocated by task 212: [ 105.908888] kasan_save_stack+0x22/0x50 [ 105.909379] kasan_set_track+0x25/0x30 [ 105.909899] __kasan_slab_alloc+0x59/0x70 [ 105.910429] kmem_cache_alloc+0x16b/0x370 [ 105.910939] vm_area_dup+0x20/0x160 [ 105.911387] __split_vma+0x170/0x950 [ 105.911856] split_vma+0xc6/0x110 [ 105.912293] mprotect_fixup+0x8d2/0xb30 [ 105.912795] do_mprotect_pkey+0x87e/0xd40 [ 105.913311] __x64_sys_mprotect+0x78/0xc0 [ 105.913821] do_syscall_64+0x3f/0x90 [ 105.914323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.914952] [ 105.915171] Freed by task 212: [ 105.915563] kasan_save_stack+0x22/0x50 [ 105.916060] kasan_set_track+0x25/0x30 [ 105.916555] kasan_save_free_info+0x2b/0x50 [ 105.917088] __kasan_slab_free+0x10a/0x190 [ 105.917616] kmem_cache_free+0x10d/0x4d0 [ 105.918153] rcu_core+0x8c8/0x2860 [ 105.918590] __do_softirq+0x1b7/0x7d4 [ 105.919069] [ 105.919288] Last potentially related work creation: [ 105.919866] kasan_save_stack+0x22/0x50 [ 105.920368] __kasan_record_aux_stack+0x8e/0xa0 [ 105.920934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 105.921579] remove_vma+0x139/0x170 [ 105.922068] do_vmi_align_munmap+0xd4a/0x11f0 [ 105.922698] do_vmi_munmap+0x1f1/0x2b0 [ 105.923188] __vm_munmap+0x138/0x3a0 [ 105.923651] __x64_sys_munmap+0x59/0x80 [ 105.924150] do_syscall_64+0x3f/0x90 [ 105.924613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.925243] [ 105.925457] The buggy address belongs to the object at ffff8880199ad658 [ 105.925457] which belongs to the cache vm_area_struct of size 168 [ 105.926943] The buggy address is located 88 bytes inside of [ 105.926943] freed 168-byte region [ffff8880199ad658, ffff8880199ad700) [ 105.928329] [ 105.928543] The buggy address belongs to the physical page: [ 105.929200] page:0000000082367450 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199ad [ 105.930309] memcg:ffff8880168bdf01 [ 105.930726] flags: 0x100000000000200(slab|node=0|zone=1) [ 105.931367] page_type: 0xffffffff() [ 105.931815] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 105.932728] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168bdf01 [ 105.933626] page dumped because: kasan: bad access detected [ 105.934326] [ 105.934544] Memory state around the buggy address: [ 105.935111] ffff8880199ad580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 105.935958] ffff8880199ad600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 105.936797] >ffff8880199ad680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 105.937640] ^ [ 105.938265] ffff8880199ad700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 105.939116] ffff8880199ad780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 105.939960] ================================================================== [ 105.940879] Disabling lock debugging due to kernel taint [ 107.926073] BUG: Bad rss-counter state mm:000000005f5f0133 type:MM_FILEPAGES val:33 [ 107.927045] BUG: Bad rss-counter state mm:000000005f5f0133 type:MM_ANONPAGES val:22 [ 108.450751] BUG: Bad rss-counter state mm:00000000d732e347 type:MM_FILEPAGES val:33 [ 108.451885] BUG: Bad rss-counter state mm:00000000d732e347 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22801' (ECDSA) to the list of known hosts. 2023/06/20 00:28:58 fuzzer started 2023/06/20 00:28:58 dialing manager at localhost:44161 2023/06/20 00:28:58 checking machine... 2023/06/20 00:28:58 checking revisions... [ 109.086357] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:28:58 testing simple program... [ 109.139647] cgroup: Unknown subsys name 'net' [ 109.186098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:27:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801618d1c0 RSI=ffffffff83866993 RDI=ffffffff8560b640 RBP=ffff888015998000 RSP=ffff888016d77820 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800ed4f8c0 R13=ffff88801599857c R14=ffff888015998579 R15=ffff888015998600 RIP=ffffffff812d8610 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 00007f7cdc4f5900 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=00007f7cdcaac618 CR3=0000000016236000 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=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=00007f7670f20fa0 CR3=000000000cc28000 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=9ded4cf71fcf8c90d94d721c8d0ada00 XMM02=0000000000124f08ec2efd57dc4c00df XMM03=000000000012c4388592eb889cd7c8b4 XMM04=aad4ff0b24ff6e6800000000000ae988 XMM05=49c471dfcf4c31c0000000000013c5c0 XMM06=806171799158d967000000000013bfb8 XMM07=e042d86d42eb936e000000000012c6b8 XMM08=8592eb889cd7c8b40000000000124f68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000