syzkaller login: [ 30.672897] BUG: Bad rss-counter state mm:00000000e0d02c0a type:MM_FILEPAGES val:33 [ 30.674173] BUG: Bad rss-counter state mm:00000000e0d02c0a type:MM_ANONPAGES val:22 [ 30.709715] ================================================================== [ 30.710634] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.711583] Read of size 8 at addr ffff888015db2d08 by task sshd/220 [ 30.712360] [ 30.712577] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.713703] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.714683] Call Trace: [ 30.715012] [ 30.715294] dump_stack_lvl+0x91/0xf0 [ 30.715832] print_report+0xcc/0x620 [ 30.716324] ? __virt_addr_valid+0x102/0x340 [ 30.716886] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718135] kasan_report+0xbe/0xf0 [ 30.718617] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.719239] vma_interval_tree_remove+0xc75/0xec0 [ 30.719839] vma_prepare+0xc54/0x11a0 [ 30.720322] __split_vma+0x5af/0x950 [ 30.720794] ? __pfx___split_vma+0x10/0x10 [ 30.721331] ? find_held_lock+0x2c/0x110 [ 30.721860] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.722436] ? lock_is_held_type+0x9f/0x120 [ 30.722982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.723597] ? mtree_range_walk+0x632/0x900 [ 30.724159] ? mas_walk+0x5c7/0x7c0 [ 30.724640] do_vmi_munmap+0x1f1/0x2b0 [ 30.725137] mmap_region+0x1f9/0x2660 [ 30.725645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.726161] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.726880] ? __pfx_lock_acquire+0x10/0x10 [ 30.727420] ? __pfx_mmap_region+0x10/0x10 [ 30.727964] ? security_mmap_addr+0x7d/0xa0 [ 30.728492] ? get_unmapped_area+0x1f5/0x3f0 [ 30.729042] do_mmap+0x854/0xf00 [ 30.729489] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.729986] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.730553] ksys_mmap_pgoff+0x3af/0x500 [ 30.731062] do_syscall_64+0x3f/0x90 [ 30.731542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.732201] RIP: 0033:0x7f110390cd82 [ 30.732664] 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 [ 30.734818] RSP: 002b:00007ffc0e8d09c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.735730] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f110390cd82 [ 30.736592] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1102d46000 [ 30.737467] RBP: 00007f1102d46000 R08: 0000000000000009 R09: 0000000000001000 [ 30.738312] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562506001d90 [ 30.739164] R13: 00007ffc0e8d09e0 R14: 00007ffc0e8d0a10 R15: 00007ffc0e8d0d70 [ 30.740031] [ 30.740327] [ 30.740543] Allocated by task 213: [ 30.740978] kasan_save_stack+0x22/0x50 [ 30.741493] kasan_set_track+0x25/0x30 [ 30.741992] __kasan_slab_alloc+0x59/0x70 [ 30.742511] kmem_cache_alloc+0x16b/0x370 [ 30.743036] vm_area_dup+0x20/0x160 [ 30.743484] __split_vma+0x170/0x950 [ 30.743958] split_vma+0xc6/0x110 [ 30.744396] mprotect_fixup+0x8d2/0xb30 [ 30.744903] do_mprotect_pkey+0x87e/0xd40 [ 30.745446] __x64_sys_mprotect+0x78/0xc0 [ 30.745974] do_syscall_64+0x3f/0x90 [ 30.746455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747104] [ 30.747319] Freed by task 213: [ 30.747717] kasan_save_stack+0x22/0x50 [ 30.748229] kasan_set_track+0x25/0x30 [ 30.748720] kasan_save_free_info+0x2b/0x50 [ 30.749248] __kasan_slab_free+0x10a/0x190 [ 30.749796] kmem_cache_free+0x10d/0x4d0 [ 30.750300] rcu_core+0x8c8/0x2860 [ 30.750743] __do_softirq+0x1b7/0x7d4 [ 30.751221] [ 30.751434] Last potentially related work creation: [ 30.752025] kasan_save_stack+0x22/0x50 [ 30.752525] __kasan_record_aux_stack+0x8e/0xa0 [ 30.753094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.753745] remove_vma+0x139/0x170 [ 30.754230] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.754809] do_vmi_munmap+0x1f1/0x2b0 [ 30.755305] __vm_munmap+0x138/0x3a0 [ 30.755777] __x64_sys_munmap+0x59/0x80 [ 30.756281] do_syscall_64+0x3f/0x90 [ 30.756768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757424] [ 30.757638] The buggy address belongs to the object at ffff888015db2cb0 [ 30.757638] which belongs to the cache vm_area_struct of size 168 [ 30.759098] The buggy address is located 88 bytes inside of [ 30.759098] freed 168-byte region [ffff888015db2cb0, ffff888015db2d58) [ 30.760496] [ 30.760712] The buggy address belongs to the physical page: [ 30.761373] page:000000002bcf72f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15db2 [ 30.762476] memcg:ffff88800e9eae01 [ 30.762898] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.763542] page_type: 0xffffffff() [ 30.763996] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.764911] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9eae01 [ 30.765882] page dumped because: kasan: bad access detected [ 30.766546] [ 30.766760] Memory state around the buggy address: [ 30.767350] ffff888015db2c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.768255] ffff888015db2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.769152] >ffff888015db2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.770033] ^ [ 30.770497] ffff888015db2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.771379] ffff888015db2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.772273] ================================================================== [ 30.773364] Disabling lock debugging due to kernel taint [ 32.756622] BUG: Bad rss-counter state mm:00000000e3fd6dc6 type:MM_FILEPAGES val:33 [ 32.757797] BUG: Bad rss-counter state mm:00000000e3fd6dc6 type:MM_ANONPAGES val:22 [ 33.146883] BUG: Bad rss-counter state mm:00000000befb5005 type:MM_FILEPAGES val:33 [ 33.148606] BUG: Bad rss-counter state mm:00000000befb5005 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62668' (ECDSA) to the list of known hosts. 2023/06/21 07:57:42 fuzzer started 2023/06/21 07:57:42 dialing manager at localhost:36067 2023/06/21 07:57:42 checking machine... 2023/06/21 07:57:42 checking revisions... [ 33.880354] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:57:42 testing simple program... [ 33.935090] cgroup: Unknown subsys name 'net' [ 33.983100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:57:41 Registers: info registers vcpu 0 RAX=ffffffff8180ce8d RBX=ffffffff85dfe188 RCX=ffffffff8180ce88 RDX=0000000000000000 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe188 RSP=ffff888015cd78f0 R8 =ffffffff86139066 R9 =ffff888015cd79e8 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe18c R13=ffffffff85dfe158 R14=ffffffff85dfe184 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000293 [--S-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 00007fca0d57f900 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=00007fca0db36618 CR3=000000000f46e000 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=0000000000000003 RBX=0000000000000001 RCX=ffffffff81289067 RDX=0000000000002890 RSI=0000000000002890 RDI=ffffffff864f3c30 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000baa4 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff811307c2 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 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=00007fb213dd73d0 CR3=000000000ca58000 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=2e22792fc8d1be87644d627912c97ea2 XMM02=2c67c8bc2e329bc3000000000011a808 XMM03=fb795ef6d65770560000000000122150 XMM04=45c2cb63b6270ac600000000000ae988 XMM05=19e9129bd510f2350000000000131fa8 XMM06=e1527c876e920c0f0000000000130e10 XMM07=e042d86d42eb936e00000000001223d0 XMM08=fda6f116a0cf6109000000000011a868 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000