syzkaller login: [ 33.529707] BUG: Bad rss-counter state mm:000000008f9cc03c type:MM_FILEPAGES val:33 [ 33.530905] BUG: Bad rss-counter state mm:000000008f9cc03c type:MM_ANONPAGES val:22 [ 33.672248] ================================================================== [ 33.673256] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.674304] Read of size 8 at addr ffff888018188c20 by task sshd/221 [ 33.675283] [ 33.675520] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.676455] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.677532] Call Trace: [ 33.677918] <TASK> [ 33.678223] dump_stack_lvl+0x91/0xf0 [ 33.678749] print_report+0xcc/0x620 [ 33.679270] ? __virt_addr_valid+0x102/0x340 [ 33.679861] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.680538] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.681196] kasan_report+0xbe/0xf0 [ 33.681752] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.682441] vma_interval_tree_remove+0xc75/0xec0 [ 33.683107] vma_prepare+0xc54/0x11a0 [ 33.683635] __split_vma+0x5af/0x950 [ 33.684157] ? __pfx___split_vma+0x10/0x10 [ 33.684746] ? find_held_lock+0x2c/0x110 [ 33.685321] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.685987] ? lock_is_held_type+0x9f/0x120 [ 33.686583] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.687254] ? mtree_range_walk+0x632/0x900 [ 33.687857] ? mas_walk+0x5c7/0x7c0 [ 33.688398] do_vmi_munmap+0x1f1/0x2b0 [ 33.688942] mmap_region+0x1f9/0x2660 [ 33.689477] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.690075] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.690862] ? __pfx_lock_acquire+0x10/0x10 [ 33.691448] ? __pfx_mmap_region+0x10/0x10 [ 33.692030] ? security_mmap_addr+0x7d/0xa0 [ 33.692619] ? get_unmapped_area+0x1f5/0x3f0 [ 33.693223] do_mmap+0x854/0xf00 [ 33.693741] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.694293] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.694910] ksys_mmap_pgoff+0x3af/0x500 [ 33.695469] do_syscall_64+0x3f/0x90 [ 33.696003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.696726] RIP: 0033:0x7fd3a4ab3d82 [ 33.697227] 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 [ 33.699554] RSP: 002b:00007ffc650c0838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.700553] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3a4ab3d82 [ 33.701488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3a3eed000 [ 33.702438] RBP: 00007fd3a3eed000 R08: 0000000000000009 R09: 0000000000001000 [ 33.703371] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a98860ec0 [ 33.704301] R13: 00007ffc650c0850 R14: 00007ffc650c0880 R15: 00007ffc650c0be0 [ 33.705268] </TASK> [ 33.705595] [ 33.705857] Allocated by task 214: [ 33.706328] kasan_save_stack+0x22/0x50 [ 33.706881] kasan_set_track+0x25/0x30 [ 33.707426] __kasan_slab_alloc+0x59/0x70 [ 33.708040] kmem_cache_alloc+0x16b/0x370 [ 33.708618] vm_area_dup+0x20/0x160 [ 33.709112] __split_vma+0x170/0x950 [ 33.709644] split_vma+0xc6/0x110 [ 33.710143] mprotect_fixup+0x8d2/0xb30 [ 33.710696] do_mprotect_pkey+0x87e/0xd40 [ 33.711266] __x64_sys_mprotect+0x78/0xc0 [ 33.711840] do_syscall_64+0x3f/0x90 [ 33.712379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.713092] [ 33.713323] Freed by task 214: [ 33.713793] kasan_save_stack+0x22/0x50 [ 33.714344] kasan_set_track+0x25/0x30 [ 33.714880] kasan_save_free_info+0x2b/0x50 [ 33.715469] __kasan_slab_free+0x10a/0x190 [ 33.716051] kmem_cache_free+0x10d/0x4d0 [ 33.716706] rcu_core+0x8c8/0x2860 [ 33.717197] __do_softirq+0x1b7/0x7d4 [ 33.717753] [ 33.717990] Last potentially related work creation: [ 33.718625] kasan_save_stack+0x22/0x50 [ 33.719178] __kasan_record_aux_stack+0x8e/0xa0 [ 33.719811] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.720534] remove_vma+0x139/0x170 [ 33.721028] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.721670] do_vmi_munmap+0x1f1/0x2b0 [ 33.722215] __vm_munmap+0x138/0x3a0 [ 33.722730] __x64_sys_munmap+0x59/0x80 [ 33.723276] do_syscall_64+0x3f/0x90 [ 33.723798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.724514] [ 33.724750] The buggy address belongs to the object at ffff888018188bc8 [ 33.724750] which belongs to the cache vm_area_struct of size 168 [ 33.726399] The buggy address is located 88 bytes inside of [ 33.726399] freed 168-byte region [ffff888018188bc8, ffff888018188c70) [ 33.727941] [ 33.728180] The buggy address belongs to the physical page: [ 33.728909] page:000000005be43d8f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18188 [ 33.730141] memcg:ffff888018360a01 [ 33.730603] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.731363] page_type: 0xffffffff() [ 33.731857] raw: 0100000000000200 ffff88800879fc80 ffffea0000608280 dead000000000003 [ 33.732892] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018360a01 [ 33.733924] page dumped because: kasan: bad access detected [ 33.734648] [ 33.734885] Memory state around the buggy address: [ 33.735518] ffff888018188b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.736463] ffff888018188b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.737400] >ffff888018188c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.738358] ^ [ 33.738942] ffff888018188c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.739884] ffff888018188d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.740831] ================================================================== [ 33.741885] Disabling lock debugging due to kernel taint [ 35.922456] BUG: Bad rss-counter state mm:000000004ed8eb16 type:MM_FILEPAGES val:33 [ 35.923834] BUG: Bad rss-counter state mm:000000004ed8eb16 type:MM_ANONPAGES val:22 [ 36.400415] BUG: Bad rss-counter state mm:000000001b5e6d12 type:MM_FILEPAGES val:33 [ 36.401601] BUG: Bad rss-counter state mm:000000001b5e6d12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10909' (ECDSA) to the list of known hosts. 2023/06/20 10:27:57 fuzzer started 2023/06/20 10:27:57 dialing manager at localhost:44161 2023/06/20 10:27:57 checking machine... 2023/06/20 10:27:57 checking revisions... [ 37.125953] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:27:57 testing simple program... [ 37.174278] cgroup: Unknown subsys name 'net' [ 37.229501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:27:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800eccf978 RCX=0000000000000001 RDX=1ffff11001d99f31 RSI=ffff88800eccff18 RDI=ffff88800eccf988 RBP=ffff88800eccff18 RSP=ffff88800eccf8d0 R8 =ffffffff863b1c82 R9 =ffff88800eccf9b8 R10=0000000000038001 R11=000000000008a96b R12=0000000000000008 R13=ffff88800ecc8000 R14=ffff88800eccff20 R15=ffff88800eccf978 RIP=ffffffff81130468 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 00007f42e94e8900 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=00007f42e9a9f618 CR3=000000001a2c0000 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=00007f987a615030 CR3=000000000d724000 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=0146fa699ba22882b1461a94a7075cb7 XMM02=2c67c8bc2e329bc3000000000011dac8 XMM03=fb795ef6d657705600000000001247d0 XMM04=23a56c8cf74c376c00000000000ae988 XMM05=0c1b2bd86fdcc7f70000000000135178 XMM06=c291bd5c70af25b90000000000134218 XMM07=e042d86d42eb936e0000000000124a50 XMM08=2290173fc2db4a30000000000011db28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000