syzkaller login: [ 31.072729] BUG: Bad rss-counter state mm:00000000408e36bf type:MM_FILEPAGES val:33 [ 31.073400] BUG: Bad rss-counter state mm:00000000408e36bf type:MM_ANONPAGES val:22 [ 31.102839] ================================================================== [ 31.103601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.104258] Read of size 8 at addr ffff8880098aa798 by task sshd/221 [ 31.104825] [ 31.105006] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.105668] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.106471] Call Trace: [ 31.106779] [ 31.106977] dump_stack_lvl+0x91/0xf0 [ 31.107611] print_report+0xcc/0x620 [ 31.107946] ? __virt_addr_valid+0x102/0x340 [ 31.108372] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.108925] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.109380] kasan_report+0xbe/0xf0 [ 31.109700] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.110268] vma_interval_tree_remove+0xc75/0xec0 [ 31.110740] vma_prepare+0xc54/0x11a0 [ 31.111075] __split_vma+0x5af/0x950 [ 31.111398] ? __pfx___split_vma+0x10/0x10 [ 31.111757] ? find_held_lock+0x2c/0x110 [ 31.112108] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.112491] ? lock_is_held_type+0x9f/0x120 [ 31.112863] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.113285] ? mtree_range_walk+0x632/0x900 [ 31.113683] ? mas_walk+0x5c7/0x7c0 [ 31.114079] do_vmi_munmap+0x1f1/0x2b0 [ 31.114411] mmap_region+0x1f9/0x2660 [ 31.114757] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.115123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.115613] ? __pfx_lock_acquire+0x10/0x10 [ 31.115972] ? __pfx_mmap_region+0x10/0x10 [ 31.116336] ? security_mmap_addr+0x7d/0xa0 [ 31.116701] ? get_unmapped_area+0x1f5/0x3f0 [ 31.117087] do_mmap+0x854/0xf00 [ 31.117384] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.117724] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.118139] ksys_mmap_pgoff+0x3af/0x500 [ 31.118489] do_syscall_64+0x3f/0x90 [ 31.118838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.119299] RIP: 0033:0x7fe5bbdb9d82 [ 31.119626] 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 [ 31.121122] RSP: 002b:00007ffc98119f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.121732] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5bbdb9d82 [ 31.122376] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5bb1f3000 [ 31.123003] RBP: 00007fe5bb1f3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.123589] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9226a6ec0 [ 31.124200] R13: 00007ffc98119f90 R14: 00007ffc98119fc0 R15: 00007ffc9811a320 [ 31.124808] [ 31.125013] [ 31.125161] Allocated by task 214: [ 31.125470] kasan_save_stack+0x22/0x50 [ 31.125894] kasan_set_track+0x25/0x30 [ 31.126260] __kasan_slab_alloc+0x59/0x70 [ 31.126632] kmem_cache_alloc+0x16b/0x370 [ 31.126975] vm_area_dup+0x20/0x160 [ 31.127286] __split_vma+0x170/0x950 [ 31.127612] split_vma+0xc6/0x110 [ 31.127963] mprotect_fixup+0x8d2/0xb30 [ 31.128313] do_mprotect_pkey+0x87e/0xd40 [ 31.128653] __x64_sys_mprotect+0x78/0xc0 [ 31.128995] do_syscall_64+0x3f/0x90 [ 31.129315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129758] [ 31.129925] Freed by task 13: [ 31.130181] kasan_save_stack+0x22/0x50 [ 31.130522] kasan_set_track+0x25/0x30 [ 31.130863] kasan_save_free_info+0x2b/0x50 [ 31.131218] __kasan_slab_free+0x10a/0x190 [ 31.131584] kmem_cache_free+0x10d/0x4d0 [ 31.131943] rcu_core+0x8c8/0x2860 [ 31.132254] __do_softirq+0x1b7/0x7d4 [ 31.132590] [ 31.132739] Last potentially related work creation: [ 31.133149] kasan_save_stack+0x22/0x50 [ 31.133494] __kasan_record_aux_stack+0x8e/0xa0 [ 31.133923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.134371] remove_vma+0x139/0x170 [ 31.134685] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.135074] do_vmi_munmap+0x1f1/0x2b0 [ 31.135412] __vm_munmap+0x138/0x3a0 [ 31.135738] __x64_sys_munmap+0x59/0x80 [ 31.136075] do_syscall_64+0x3f/0x90 [ 31.136411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.136863] [ 31.137009] The buggy address belongs to the object at ffff8880098aa740 [ 31.137009] which belongs to the cache vm_area_struct of size 168 [ 31.138023] The buggy address is located 88 bytes inside of [ 31.138023] freed 168-byte region [ffff8880098aa740, ffff8880098aa7e8) [ 31.138918] [ 31.139058] The buggy address belongs to the physical page: [ 31.139504] page:000000000f43c0c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98aa [ 31.140257] memcg:ffff88800ce00801 [ 31.140558] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.141045] page_type: 0xffffffff() [ 31.141351] raw: 0100000000000200 ffff88800879fc80 ffffea0000389080 dead000000000005 [ 31.142003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce00801 [ 31.142663] page dumped because: kasan: bad access detected [ 31.143135] [ 31.143281] Memory state around the buggy address: [ 31.143674] ffff8880098aa680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.144302] ffff8880098aa700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.144917] >ffff8880098aa780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.145499] ^ [ 31.145891] ffff8880098aa800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.146521] ffff8880098aa880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.147128] ================================================================== [ 31.147913] Disabling lock debugging due to kernel taint [ 33.050534] BUG: Bad rss-counter state mm:000000004ddd3498 type:MM_FILEPAGES val:33 [ 33.051215] BUG: Bad rss-counter state mm:000000004ddd3498 type:MM_ANONPAGES val:22 [ 33.370840] BUG: Bad rss-counter state mm:00000000bd0edce5 type:MM_FILEPAGES val:33 [ 33.371619] BUG: Bad rss-counter state mm:00000000bd0edce5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7586' (ECDSA) to the list of known hosts. 2023/06/20 09:20:22 fuzzer started 2023/06/20 09:20:22 dialing manager at localhost:44161 2023/06/20 09:20:22 checking machine... 2023/06/20 09:20:22 checking revisions... [ 33.949989] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:20:22 testing simple program... [ 33.988764] cgroup: Unknown subsys name 'net' [ 34.034824] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:20:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00007f0faf56219d RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=00007f0faf56219d RBP=00007f0faf56219d RSP=ffff88806ce09a30 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f0faf562000 R11=00000000000b6996 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800fedd1c0 R15=ffff88800c5a6800 RIP=ffffffff813a0a60 RFL=00000202 [-------] 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 00007f0faec98900 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=00007f0fae12cc40 CR3=000000000d8ec000 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=c696d7309eafc798a74b67742a65b0ae XMM02=ec2efd57dc4c00df000000000011cfa0 XMM03=9e47c89702b2d868000000000011d070 XMM04=974a68b13fc345d300000000000ae988 XMM05=06388ee15831ae2a0000000000135300 XMM06=e4cb8bb95a7664b60000000000134448 XMM07=fb795ef6d657705600000000001248b8 XMM08=2c67c8bc2e329bc3000000000011d010 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb1082 RBX=ffffffff85d88414 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff888010347998 R8 =ffffffff86088c1a R9 =ffff888010347ae0 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88420 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fcf89a7c900 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=00007fcf8a033618 CR3=000000000e7d6000 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=563412feff00545000000000000080fe 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