syzkaller login: [ 83.935356] BUG: Bad rss-counter state mm:00000000e217f832 type:MM_FILEPAGES val:33 [ 83.936874] BUG: Bad rss-counter state mm:00000000e217f832 type:MM_ANONPAGES val:22 [ 84.087852] ================================================================== [ 84.088793] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 84.089719] Read of size 8 at addr ffff88800f667b38 by task sshd/222 [ 84.090489] [ 84.090706] CPU: 1 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 84.091887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 84.092862] Call Trace: [ 84.093184] [ 84.093479] dump_stack_lvl+0x91/0xf0 [ 84.093968] print_report+0xcc/0x620 [ 84.094457] ? __virt_addr_valid+0x102/0x340 [ 84.095018] ? vma_interval_tree_remove+0xc75/0xec0 [ 84.095635] ? vma_interval_tree_remove+0xc75/0xec0 [ 84.096275] kasan_report+0xbe/0xf0 [ 84.096747] ? vma_interval_tree_remove+0xc75/0xec0 [ 84.097380] vma_interval_tree_remove+0xc75/0xec0 [ 84.097990] vma_prepare+0xc54/0x11a0 [ 84.098472] __split_vma+0x5af/0x950 [ 84.098941] ? __pfx___split_vma+0x10/0x10 [ 84.099467] ? find_held_lock+0x2c/0x110 [ 84.100005] do_vmi_align_munmap+0x2ba/0x11f0 [ 84.100568] ? lock_is_held_type+0x9f/0x120 [ 84.101103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 84.101713] ? mtree_range_walk+0x632/0x900 [ 84.102259] ? mas_walk+0x5c7/0x7c0 [ 84.102734] do_vmi_munmap+0x1f1/0x2b0 [ 84.103225] mmap_region+0x1f9/0x2660 [ 84.103726] ? vm_mmap_pgoff+0x15c/0x3a0 [ 84.104240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 84.104949] ? __pfx_lock_acquire+0x10/0x10 [ 84.105486] ? __pfx_mmap_region+0x10/0x10 [ 84.106021] ? security_mmap_addr+0x7d/0xa0 [ 84.106551] ? get_unmapped_area+0x1f5/0x3f0 [ 84.107116] do_mmap+0x854/0xf00 [ 84.107554] vm_mmap_pgoff+0x1a6/0x3a0 [ 84.108063] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 84.108626] ksys_mmap_pgoff+0x3af/0x500 [ 84.109134] do_syscall_64+0x3f/0x90 [ 84.109619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 84.110262] RIP: 0033:0x7fdeaeadbd82 [ 84.110724] 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 [ 84.112864] RSP: 002b:00007ffea6bee8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 84.113771] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdeaeadbd82 [ 84.114625] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdeadf15000 [ 84.115475] RBP: 00007fdeadf15000 R08: 0000000000000009 R09: 0000000000001000 [ 84.116350] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611761d7ec0 [ 84.117210] R13: 00007ffea6bee8e0 R14: 00007ffea6bee910 R15: 00007ffea6beec70 [ 84.118074] [ 84.118366] [ 84.118580] Allocated by task 215: [ 84.119011] kasan_save_stack+0x22/0x50 [ 84.119521] kasan_set_track+0x25/0x30 [ 84.120018] __kasan_slab_alloc+0x59/0x70 [ 84.120542] kmem_cache_alloc+0x16b/0x370 [ 84.121058] vm_area_dup+0x20/0x160 [ 84.121508] __split_vma+0x170/0x950 [ 84.121978] split_vma+0xc6/0x110 [ 84.122411] mprotect_fixup+0x8d2/0xb30 [ 84.122918] do_mprotect_pkey+0x87e/0xd40 [ 84.123441] __x64_sys_mprotect+0x78/0xc0 [ 84.123968] do_syscall_64+0x3f/0x90 [ 84.124440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 84.125084] [ 84.125302] Freed by task 215: [ 84.125690] kasan_save_stack+0x22/0x50 [ 84.126192] kasan_set_track+0x25/0x30 [ 84.126695] kasan_save_free_info+0x2b/0x50 [ 84.127243] __kasan_slab_free+0x10a/0x190 [ 84.127805] kmem_cache_free+0x10d/0x4d0 [ 84.128320] rcu_core+0x8c8/0x2860 [ 84.128766] __do_softirq+0x1b7/0x7d4 [ 84.129242] [ 84.129451] Last potentially related work creation: [ 84.130038] kasan_save_stack+0x22/0x50 [ 84.130538] __kasan_record_aux_stack+0x8e/0xa0 [ 84.131110] __call_rcu_common.constprop.0+0x6a/0xb90 [ 84.131758] remove_vma+0x139/0x170 [ 84.132208] do_vmi_align_munmap+0xd4a/0x11f0 [ 84.132808] do_vmi_munmap+0x1f1/0x2b0 [ 84.133290] __vm_munmap+0x138/0x3a0 [ 84.133757] __x64_sys_munmap+0x59/0x80 [ 84.134254] do_syscall_64+0x3f/0x90 [ 84.134727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 84.135361] [ 84.135579] The buggy address belongs to the object at ffff88800f667ae0 [ 84.135579] which belongs to the cache vm_area_struct of size 168 [ 84.137071] The buggy address is located 88 bytes inside of [ 84.137071] freed 168-byte region [ffff88800f667ae0, ffff88800f667b88) [ 84.138482] [ 84.138696] The buggy address belongs to the physical page: [ 84.139362] page:00000000da80d50e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf667 [ 84.140479] memcg:ffff88801bc27c01 [ 84.140911] flags: 0x100000000000200(slab|node=0|zone=1) [ 84.141553] page_type: 0xffffffff() [ 84.141998] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 84.142919] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc27c01 [ 84.143850] page dumped because: kasan: bad access detected [ 84.144507] [ 84.144725] Memory state around the buggy address: [ 84.145305] ffff88800f667a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 84.146166] ffff88800f667a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 84.147018] >ffff88800f667b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 84.147884] ^ [ 84.148491] ffff88800f667b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 84.149357] ffff88800f667c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 84.150211] ================================================================== [ 84.151175] Disabling lock debugging due to kernel taint [ 86.182128] BUG: Bad rss-counter state mm:000000006e913457 type:MM_FILEPAGES val:33 [ 86.182715] BUG: Bad rss-counter state mm:000000006e913457 type:MM_ANONPAGES val:22 [ 86.608453] BUG: Bad rss-counter state mm:000000006add28e8 type:MM_FILEPAGES val:33 [ 86.610349] BUG: Bad rss-counter state mm:000000006add28e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36443' (ECDSA) to the list of known hosts. 2023/06/19 16:44:56 fuzzer started 2023/06/19 16:44:56 dialing manager at localhost:44161 2023/06/19 16:44:56 checking machine... 2023/06/19 16:44:56 checking revisions... [ 87.342259] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:44:56 testing simple program... [ 87.386988] cgroup: Unknown subsys name 'net' [ 87.431548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:44:02 Registers: info registers vcpu 0 RAX=ffff8880102d9a20 RBX=ffff88800d270b18 RCX=1ffff11001bd0660 RDX=dffffc0000000000 RSI=ffff8880102dc868 RDI=ffff88800d270b48 RBP=ffff88800de83668 RSP=ffff88800f01f6b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880102dc780 R13=0000000000000000 R14=ffff88800e8aec28 R15=ffff88800e8aebe0 RIP=ffffffff81847508 RFL=00000046 [---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 00007f86fb7f5900 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=00007f86fbdac618 CR3=000000000eac0000 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=ffff888008c58400 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=00007ffa81bcfe30 CR3=000000000d57a000 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=a0cfe45796e71299604796a795d00e45 XMM02=0000000000121ab0eff9b2d0a8fce9cb XMM03=0000000000121b802c67c8bc2e329bc3 XMM04=3326410ac367d63f00000000000ae988 XMM05=59d5b690e0af863b00000000001391c0 XMM06=8a4c12fb2e7917f20000000000138028 XMM07=e042d86d42eb936e0000000000128f98 XMM08=be6f127b5cff35a00000000000121b80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000