syzkaller login: [ 30.593956] BUG: Bad rss-counter state mm:00000000a7ffa54e type:MM_FILEPAGES val:33 [ 30.595413] BUG: Bad rss-counter state mm:00000000a7ffa54e type:MM_ANONPAGES val:22 [ 30.765295] ================================================================== [ 30.766202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.767142] Read of size 8 at addr ffff88801990a140 by task sshd/222 [ 30.767908] [ 30.768125] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.769075] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.770043] Call Trace: [ 30.770368] [ 30.770654] dump_stack_lvl+0x91/0xf0 [ 30.771168] print_report+0xcc/0x620 [ 30.771656] ? __virt_addr_valid+0x102/0x340 [ 30.772218] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772837] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773453] kasan_report+0xbe/0xf0 [ 30.773922] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774539] vma_interval_tree_remove+0xc75/0xec0 [ 30.775145] vma_prepare+0xc54/0x11a0 [ 30.775618] __split_vma+0x5af/0x950 [ 30.776096] ? __pfx___split_vma+0x10/0x10 [ 30.776632] ? find_held_lock+0x2c/0x110 [ 30.777168] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.777732] ? lock_is_held_type+0x9f/0x120 [ 30.778277] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.778896] ? mtree_range_walk+0x632/0x900 [ 30.779461] ? mas_walk+0x5c7/0x7c0 [ 30.779965] do_vmi_munmap+0x1f1/0x2b0 [ 30.780466] mmap_region+0x1f9/0x2660 [ 30.780950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.781466] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.782190] ? __pfx_lock_acquire+0x10/0x10 [ 30.782730] ? __pfx_mmap_region+0x10/0x10 [ 30.783267] ? security_mmap_addr+0x7d/0xa0 [ 30.783812] ? get_unmapped_area+0x1f5/0x3f0 [ 30.784366] do_mmap+0x854/0xf00 [ 30.784807] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785310] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.785879] ksys_mmap_pgoff+0x3af/0x500 [ 30.786384] do_syscall_64+0x3f/0x90 [ 30.786863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787516] RIP: 0033:0x7fe635d0ed82 [ 30.787993] 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 [ 30.790112] RSP: 002b:00007ffd9f028a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.791036] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe635d0ed82 [ 30.791908] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe635148000 [ 30.792756] RBP: 00007fe635148000 R08: 0000000000000009 R09: 0000000000001000 [ 30.793609] R10: 0000000000000812 R11: 0000000000000206 R12: 000055709b82fec0 [ 30.794453] R13: 00007ffd9f028a90 R14: 00007ffd9f028ac0 R15: 00007ffd9f028e20 [ 30.795314] [ 30.795607] [ 30.795831] Allocated by task 215: [ 30.796265] kasan_save_stack+0x22/0x50 [ 30.796768] kasan_set_track+0x25/0x30 [ 30.797269] __kasan_slab_alloc+0x59/0x70 [ 30.797792] kmem_cache_alloc+0x16b/0x370 [ 30.798304] vm_area_dup+0x20/0x160 [ 30.798766] __split_vma+0x170/0x950 [ 30.799236] split_vma+0xc6/0x110 [ 30.799677] mprotect_fixup+0x8d2/0xb30 [ 30.800212] do_mprotect_pkey+0x87e/0xd40 [ 30.800748] __x64_sys_mprotect+0x78/0xc0 [ 30.801278] do_syscall_64+0x3f/0x90 [ 30.801758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802408] [ 30.802635] Freed by task 215: [ 30.803052] kasan_save_stack+0x22/0x50 [ 30.803559] kasan_set_track+0x25/0x30 [ 30.804071] kasan_save_free_info+0x2b/0x50 [ 30.804613] __kasan_slab_free+0x10a/0x190 [ 30.805147] kmem_cache_free+0x10d/0x4d0 [ 30.805664] rcu_core+0x8c8/0x2860 [ 30.806105] __do_softirq+0x1b7/0x7d4 [ 30.806598] [ 30.806816] Last potentially related work creation: [ 30.807414] kasan_save_stack+0x22/0x50 [ 30.807932] __kasan_record_aux_stack+0x8e/0xa0 [ 30.808531] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.809198] remove_vma+0x139/0x170 [ 30.809668] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.810249] do_vmi_munmap+0x1f1/0x2b0 [ 30.810752] __vm_munmap+0x138/0x3a0 [ 30.811239] __x64_sys_munmap+0x59/0x80 [ 30.811777] do_syscall_64+0x3f/0x90 [ 30.812269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812934] [ 30.813155] The buggy address belongs to the object at ffff88801990a0e8 [ 30.813155] which belongs to the cache vm_area_struct of size 168 [ 30.814687] The buggy address is located 88 bytes inside of [ 30.814687] freed 168-byte region [ffff88801990a0e8, ffff88801990a190) [ 30.816176] [ 30.816396] The buggy address belongs to the physical page: [ 30.817085] page:00000000f69e65ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1990a [ 30.818235] memcg:ffff888019a6bc01 [ 30.818679] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.819350] page_type: 0xffffffff() [ 30.819825] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.820737] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a6bc01 [ 30.821762] page dumped because: kasan: bad access detected [ 30.822612] [ 30.822904] Memory state around the buggy address: [ 30.823581] ffff88801990a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.824459] ffff88801990a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.825312] >ffff88801990a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.826165] ^ [ 30.826795] ffff88801990a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.827648] ffff88801990a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.828511] ================================================================== [ 30.829489] Disabling lock debugging due to kernel taint [ 32.785900] BUG: Bad rss-counter state mm:000000003307c99b type:MM_FILEPAGES val:33 [ 32.786972] BUG: Bad rss-counter state mm:000000003307c99b type:MM_ANONPAGES val:22 [ 33.271939] BUG: Bad rss-counter state mm:00000000c6300102 type:MM_FILEPAGES val:33 [ 33.273032] BUG: Bad rss-counter state mm:00000000c6300102 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8326' (ECDSA) to the list of known hosts. 2023/06/20 20:01:11 fuzzer started 2023/06/20 20:01:11 dialing manager at localhost:36067 2023/06/20 20:01:11 checking machine... 2023/06/20 20:01:11 checking revisions... [ 34.029939] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:01:11 testing simple program... [ 34.077887] cgroup: Unknown subsys name 'net' [ 34.116262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:01:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff813782f7 RDX=0000000000003782 RSI=0000000000003782 RDI=ffffffff864f77f8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 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=00007f05571fb980 CR3=000000000d74e000 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=cb5aeef70c7a3bb07d4523dac0954ce3 XMM02=2c67c8bc2e329bc3000000000011a0b0 XMM03=fb795ef6d65770560000000000121958 XMM04=5886c5da7933f65800000000000ae988 XMM05=59d5b690e0af863b00000000001317c8 XMM06=c044bb036335aa710000000000130630 XMM07=e042d86d42eb936e0000000000121bd8 XMM08=885059362d7c65b9000000000011a110 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000fc0c RBX=0000000000000001 RCX=ffffffff81370a89 RDX=000000000000fc18 RSI=000000000000370a RDI=000000000002f424 RBP=ffff88806cf09ac0 RSP=ffff88806cf099f8 R8 =ffffffff860d2550 R9 =ffff88806cf09aa8 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806cf09ac8 R13=ffff88806cf09ab0 R14=ffff88806cf09aa9 R15=ffff88806cf09a68 RIP=ffffffff81130853 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 00007fd9645c4900 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=00007fd964b7b618 CR3=00000000197f6000 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