syzkaller login: [ 45.913434] BUG: Bad rss-counter state mm:00000000fa58ba60 type:MM_FILEPAGES val:33 [ 45.915026] BUG: Bad rss-counter state mm:00000000fa58ba60 type:MM_ANONPAGES val:22 [ 46.078268] ================================================================== [ 46.079119] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.080003] Read of size 8 at addr ffff888016eb9c20 by task sshd/221 [ 46.080930] [ 46.081139] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.081962] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.082888] Call Trace: [ 46.083219] [ 46.083491] dump_stack_lvl+0x91/0xf0 [ 46.083965] print_report+0xcc/0x620 [ 46.084438] ? __virt_addr_valid+0x102/0x340 [ 46.085006] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.085605] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.086199] kasan_report+0xbe/0xf0 [ 46.086675] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.087282] vma_interval_tree_remove+0xc75/0xec0 [ 46.087850] vma_prepare+0xc54/0x11a0 [ 46.088311] __split_vma+0x5af/0x950 [ 46.088777] ? __pfx___split_vma+0x10/0x10 [ 46.089331] ? find_held_lock+0x2c/0x110 [ 46.089855] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.090423] ? lock_is_held_type+0x9f/0x120 [ 46.090956] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.091585] ? mtree_range_walk+0x632/0x900 [ 46.092138] ? mas_walk+0x5c7/0x7c0 [ 46.092621] do_vmi_munmap+0x1f1/0x2b0 [ 46.093132] mmap_region+0x1f9/0x2660 [ 46.093620] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.094122] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.094847] ? __pfx_lock_acquire+0x10/0x10 [ 46.095395] ? __pfx_mmap_region+0x10/0x10 [ 46.095922] ? security_mmap_addr+0x7d/0xa0 [ 46.096487] ? get_unmapped_area+0x1f5/0x3f0 [ 46.097064] do_mmap+0x854/0xf00 [ 46.097512] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.098002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.098577] ksys_mmap_pgoff+0x3af/0x500 [ 46.099072] do_syscall_64+0x3f/0x90 [ 46.099561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.100227] RIP: 0033:0x7ff9e556fd82 [ 46.100688] 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 [ 46.102823] RSP: 002b:00007ffe406b1188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.103731] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9e556fd82 [ 46.104578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9e49a9000 [ 46.105455] RBP: 00007ff9e49a9000 R08: 0000000000000009 R09: 0000000000001000 [ 46.106315] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e47c1f3ec0 [ 46.107144] R13: 00007ffe406b11a0 R14: 00007ffe406b11d0 R15: 00007ffe406b1530 [ 46.108010] [ 46.108309] [ 46.108524] Allocated by task 214: [ 46.108947] kasan_save_stack+0x22/0x50 [ 46.109463] kasan_set_track+0x25/0x30 [ 46.109953] __kasan_slab_alloc+0x59/0x70 [ 46.110489] kmem_cache_alloc+0x16b/0x370 [ 46.111004] vm_area_dup+0x20/0x160 [ 46.111492] __split_vma+0x170/0x950 [ 46.111959] split_vma+0xc6/0x110 [ 46.112416] mprotect_fixup+0x8d2/0xb30 [ 46.112920] do_mprotect_pkey+0x87e/0xd40 [ 46.113454] __x64_sys_mprotect+0x78/0xc0 [ 46.113972] do_syscall_64+0x3f/0x90 [ 46.114453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.115090] [ 46.115316] Freed by task 19: [ 46.115695] kasan_save_stack+0x22/0x50 [ 46.116208] kasan_set_track+0x25/0x30 [ 46.116705] kasan_save_free_info+0x2b/0x50 [ 46.117268] __kasan_slab_free+0x10a/0x190 [ 46.117798] kmem_cache_free+0x10d/0x4d0 [ 46.118317] rcu_core+0x8c8/0x2860 [ 46.118755] __do_softirq+0x1b7/0x7d4 [ 46.119238] [ 46.119456] Last potentially related work creation: [ 46.120035] kasan_save_stack+0x22/0x50 [ 46.120541] __kasan_record_aux_stack+0x8e/0xa0 [ 46.121130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.121795] remove_vma+0x139/0x170 [ 46.122265] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.122825] do_vmi_munmap+0x1f1/0x2b0 [ 46.123318] __vm_munmap+0x138/0x3a0 [ 46.123787] __x64_sys_munmap+0x59/0x80 [ 46.124292] do_syscall_64+0x3f/0x90 [ 46.124774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.125421] [ 46.125642] The buggy address belongs to the object at ffff888016eb9bc8 [ 46.125642] which belongs to the cache vm_area_struct of size 168 [ 46.127136] The buggy address is located 88 bytes inside of [ 46.127136] freed 168-byte region [ffff888016eb9bc8, ffff888016eb9c70) [ 46.128553] [ 46.128785] The buggy address belongs to the physical page: [ 46.129449] page:0000000070b830c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16eb9 [ 46.130536] memcg:ffff88800ef08501 [ 46.130961] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.131631] page_type: 0xffffffff() [ 46.132080] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.133017] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef08501 [ 46.133935] page dumped because: kasan: bad access detected [ 46.134603] [ 46.134816] Memory state around the buggy address: [ 46.135417] ffff888016eb9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.136291] ffff888016eb9b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 46.137218] >ffff888016eb9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 46.138062] ^ [ 46.138596] ffff888016eb9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 46.139459] ffff888016eb9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 46.140303] ================================================================== [ 46.141376] Disabling lock debugging due to kernel taint [ 47.990575] BUG: Bad rss-counter state mm:000000007752b07c type:MM_FILEPAGES val:33 [ 47.991720] BUG: Bad rss-counter state mm:000000007752b07c type:MM_ANONPAGES val:22 [ 48.382061] BUG: Bad rss-counter state mm:000000009a1c2ff7 type:MM_FILEPAGES val:33 [ 48.383686] BUG: Bad rss-counter state mm:000000009a1c2ff7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24071' (ECDSA) to the list of known hosts. 2023/06/19 13:35:10 fuzzer started 2023/06/19 13:35:11 dialing manager at localhost:44161 2023/06/19 13:35:11 checking machine... 2023/06/19 13:35:11 checking revisions... [ 49.041865] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:35:11 testing simple program... [ 49.090485] cgroup: Unknown subsys name 'net' [ 49.138433] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:34:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff888016703680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888016d9f788 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff888019ff9e40 RIP=ffffffff814c0388 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 00007efc1d007900 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=00007ffc99ac4000 CR3=0000000019ea4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fdb35652010 CR3=000000000cb8c000 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=acd48a62aadf2fbdbc4c5504c1b89707 XMM02=ec2efd57dc4c00df000000000011f900 XMM03=5395d31dc6077ce4000000000011f9d0 XMM04=8d6725d0149e367300000000000ae988 XMM05=e4cb8bb95a7664b60000000000133c98 XMM06=916d8a89900048bb0000000000132b00 XMM07=e042d86d42eb936e0000000000124390 XMM08=5395d31dc6077ce4000000000011f9d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000