syzkaller login: [ 28.673536] BUG: Bad rss-counter state mm:000000007c4fafc2 type:MM_FILEPAGES val:33 [ 28.674397] BUG: Bad rss-counter state mm:000000007c4fafc2 type:MM_ANONPAGES val:22 [ 28.804730] ================================================================== [ 28.805465] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.806237] Read of size 8 at addr ffff888013aa4d08 by task sshd/221 [ 28.806854] [ 28.807030] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.807730] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.808517] Call Trace: [ 28.808772] [ 28.809106] dump_stack_lvl+0x91/0xf0 [ 28.809508] print_report+0xcc/0x620 [ 28.809895] ? __virt_addr_valid+0x102/0x340 [ 28.810360] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.810861] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.811387] kasan_report+0xbe/0xf0 [ 28.811771] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.812271] vma_interval_tree_remove+0xc75/0xec0 [ 28.812750] vma_prepare+0xc54/0x11a0 [ 28.813137] __split_vma+0x5af/0x950 [ 28.813516] ? __pfx___split_vma+0x10/0x10 [ 28.813942] ? find_held_lock+0x2c/0x110 [ 28.814374] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.814828] ? lock_is_held_type+0x9f/0x120 [ 28.815262] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.815749] ? mtree_range_walk+0x632/0x900 [ 28.816200] ? mas_walk+0x5c7/0x7c0 [ 28.816586] do_vmi_munmap+0x1f1/0x2b0 [ 28.816983] mmap_region+0x1f9/0x2660 [ 28.817374] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.817784] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.818374] ? __pfx_lock_acquire+0x10/0x10 [ 28.818804] ? __pfx_mmap_region+0x10/0x10 [ 28.819231] ? security_mmap_addr+0x7d/0xa0 [ 28.819656] ? get_unmapped_area+0x1f5/0x3f0 [ 28.820105] do_mmap+0x854/0xf00 [ 28.820458] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.820856] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.821308] ksys_mmap_pgoff+0x3af/0x500 [ 28.821725] do_syscall_64+0x3f/0x90 [ 28.822127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.822647] RIP: 0033:0x7fdfaf03cd82 [ 28.823016] 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 [ 28.824739] RSP: 002b:00007ffe4e99f948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.825473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfaf03cd82 [ 28.826165] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfae476000 [ 28.826854] RBP: 00007fdfae476000 R08: 0000000000000009 R09: 0000000000001000 [ 28.827535] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614815c8ec0 [ 28.828220] R13: 00007ffe4e99f960 R14: 00007ffe4e99f990 R15: 00007ffe4e99fcf0 [ 28.828913] [ 28.829150] [ 28.829324] Allocated by task 214: [ 28.829674] kasan_save_stack+0x22/0x50 [ 28.830093] kasan_set_track+0x25/0x30 [ 28.830495] __kasan_slab_alloc+0x59/0x70 [ 28.830916] kmem_cache_alloc+0x16b/0x370 [ 28.831335] vm_area_dup+0x20/0x160 [ 28.831699] __split_vma+0x170/0x950 [ 28.832073] split_vma+0xc6/0x110 [ 28.832425] mprotect_fixup+0x8d2/0xb30 [ 28.832830] do_mprotect_pkey+0x87e/0xd40 [ 28.833250] __x64_sys_mprotect+0x78/0xc0 [ 28.833671] do_syscall_64+0x3f/0x90 [ 28.834064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.834586] [ 28.834760] Freed by task 214: [ 28.835082] kasan_save_stack+0x22/0x50 [ 28.835487] kasan_set_track+0x25/0x30 [ 28.835885] kasan_save_free_info+0x2b/0x50 [ 28.836317] __kasan_slab_free+0x10a/0x190 [ 28.836742] kmem_cache_free+0x10d/0x4d0 [ 28.837160] rcu_core+0x8c8/0x2860 [ 28.837517] __do_softirq+0x1b7/0x7d4 [ 28.837903] [ 28.838096] Last potentially related work creation: [ 28.838566] kasan_save_stack+0x22/0x50 [ 28.838974] __kasan_record_aux_stack+0x8e/0xa0 [ 28.839436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.839960] remove_vma+0x139/0x170 [ 28.840321] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.840775] do_vmi_munmap+0x1f1/0x2b0 [ 28.841167] __vm_munmap+0x138/0x3a0 [ 28.841546] __x64_sys_munmap+0x59/0x80 [ 28.841946] do_syscall_64+0x3f/0x90 [ 28.842350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.842871] [ 28.843045] The buggy address belongs to the object at ffff888013aa4cb0 [ 28.843045] which belongs to the cache vm_area_struct of size 168 [ 28.844250] The buggy address is located 88 bytes inside of [ 28.844250] freed 168-byte region [ffff888013aa4cb0, ffff888013aa4d58) [ 28.845398] [ 28.845573] The buggy address belongs to the physical page: [ 28.846118] page:0000000078748e1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13aa4 [ 28.847010] memcg:ffff88800f5feb01 [ 28.847359] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.847895] page_type: 0xffffffff() [ 28.848269] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.849012] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5feb01 [ 28.849749] page dumped because: kasan: bad access detected [ 28.850313] [ 28.850487] Memory state around the buggy address: [ 28.850961] ffff888013aa4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 28.851663] ffff888013aa4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.852368] >ffff888013aa4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.853064] ^ [ 28.853429] ffff888013aa4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.854142] ffff888013aa4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.854832] ================================================================== [ 28.855739] Disabling lock debugging due to kernel taint [ 31.466408] BUG: Bad rss-counter state mm:000000003b3dd79d type:MM_FILEPAGES val:33 [ 31.467559] BUG: Bad rss-counter state mm:000000003b3dd79d type:MM_ANONPAGES val:22 [ 31.817127] BUG: Bad rss-counter state mm:00000000758826a4 type:MM_FILEPAGES val:33 [ 31.817813] BUG: Bad rss-counter state mm:00000000758826a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63434' (ECDSA) to the list of known hosts. 2023/06/21 07:28:17 fuzzer started 2023/06/21 07:28:18 dialing manager at localhost:36067 2023/06/21 07:28:18 checking machine... 2023/06/21 07:28:18 checking revisions... [ 32.429116] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:28:18 testing simple program... [ 32.458759] cgroup: Unknown subsys name 'net' [ 32.491949] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:28:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fc4907749f8 CR3=0000000005482000 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=00007fc49074351000005576bba8e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801029f098 RCX=0000000000000002 RDX=ffffffff87f95720 RSI=0000000000000040 RDI=ffff88801029f098 RBP=ffffffff84d2ff60 RSP=ffff888016987cc8 R8 =0000000000000002 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff87f95720 R13=0000000000000002 R14=ffff88801029f098 R15=ffff88801029f0e0 RIP=ffffffff812c9306 RFL=00000286 [--S--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 00007f2fb9e86900 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=00007f2fba43d618 CR3=0000000018eec000 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=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