syzkaller login: [ 49.076103] BUG: Bad rss-counter state mm:00000000467bab00 type:MM_FILEPAGES val:33 [ 49.076956] BUG: Bad rss-counter state mm:00000000467bab00 type:MM_ANONPAGES val:22 [ 49.199568] ================================================================== [ 49.200250] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.200909] Read of size 8 at addr ffff88800ee85880 by task sshd/219 [ 49.201477] [ 49.201631] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.202230] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.202904] Call Trace: [ 49.203135] <TASK> [ 49.203332] dump_stack_lvl+0x91/0xf0 [ 49.203870] print_report+0xcc/0x620 [ 49.204217] ? __virt_addr_valid+0x102/0x340 [ 49.204608] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.205037] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.205481] kasan_report+0xbe/0xf0 [ 49.205809] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.206265] vma_interval_tree_remove+0xc75/0xec0 [ 49.206690] vma_prepare+0xc54/0x11a0 [ 49.207034] __split_vma+0x5af/0x950 [ 49.207361] ? __pfx___split_vma+0x10/0x10 [ 49.207724] ? find_held_lock+0x2c/0x110 [ 49.208100] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.208503] ? lock_is_held_type+0x9f/0x120 [ 49.208889] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.209314] ? mtree_range_walk+0x632/0x900 [ 49.209864] ? mas_walk+0x5c7/0x7c0 [ 49.210231] do_vmi_munmap+0x1f1/0x2b0 [ 49.210584] mmap_region+0x1f9/0x2660 [ 49.210919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.211290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.211781] ? __pfx_lock_acquire+0x10/0x10 [ 49.212158] ? __pfx_mmap_region+0x10/0x10 [ 49.212533] ? security_mmap_addr+0x7d/0xa0 [ 49.212908] ? get_unmapped_area+0x1f5/0x3f0 [ 49.213359] do_mmap+0x854/0xf00 [ 49.213742] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.214096] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.214477] ksys_mmap_pgoff+0x3af/0x500 [ 49.214828] do_syscall_64+0x3f/0x90 [ 49.215169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.215682] RIP: 0033:0x7fd0df92ed82 [ 49.216024] 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 [ 49.217613] RSP: 002b:00007ffd10277898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.218257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0df92ed82 [ 49.218854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0ded68000 [ 49.219477] RBP: 00007fd0ded68000 R08: 0000000000000009 R09: 0000000000001000 [ 49.220075] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561188a79ec0 [ 49.220666] R13: 00007ffd102778b0 R14: 00007ffd102778e0 R15: 00007ffd10277c40 [ 49.221337] </TASK> [ 49.221568] [ 49.221717] Allocated by task 212: [ 49.222007] kasan_save_stack+0x22/0x50 [ 49.222360] kasan_set_track+0x25/0x30 [ 49.222691] __kasan_slab_alloc+0x59/0x70 [ 49.223051] kmem_cache_alloc+0x16b/0x370 [ 49.223424] vm_area_dup+0x20/0x160 [ 49.223738] __split_vma+0x170/0x950 [ 49.224064] split_vma+0xc6/0x110 [ 49.224354] mprotect_fixup+0x8d2/0xb30 [ 49.224686] do_mprotect_pkey+0x87e/0xd40 [ 49.225072] __x64_sys_mprotect+0x78/0xc0 [ 49.225516] do_syscall_64+0x3f/0x90 [ 49.225830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.226259] [ 49.226398] Freed by task 212: [ 49.226687] kasan_save_stack+0x22/0x50 [ 49.227018] kasan_set_track+0x25/0x30 [ 49.227338] kasan_save_free_info+0x2b/0x50 [ 49.227692] __kasan_slab_free+0x10a/0x190 [ 49.228050] kmem_cache_free+0x10d/0x4d0 [ 49.228398] rcu_core+0x8c8/0x2860 [ 49.228710] __do_softirq+0x1b7/0x7d4 [ 49.229056] [ 49.229213] Last potentially related work creation: [ 49.229658] kasan_save_stack+0x22/0x50 [ 49.230004] __kasan_record_aux_stack+0x8e/0xa0 [ 49.230396] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.230842] remove_vma+0x139/0x170 [ 49.231179] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.231574] do_vmi_munmap+0x1f1/0x2b0 [ 49.231908] __vm_munmap+0x138/0x3a0 [ 49.232259] __x64_sys_munmap+0x59/0x80 [ 49.232598] do_syscall_64+0x3f/0x90 [ 49.232956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.233408] [ 49.233592] The buggy address belongs to the object at ffff88800ee85828 [ 49.233592] which belongs to the cache vm_area_struct of size 168 [ 49.234614] The buggy address is located 88 bytes inside of [ 49.234614] freed 168-byte region [ffff88800ee85828, ffff88800ee858d0) [ 49.235606] [ 49.235754] The buggy address belongs to the physical page: [ 49.236201] page:00000000d8b75e12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee85 [ 49.236972] memcg:ffff88800e1bb601 [ 49.237277] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.237776] page_type: 0xffffffff() [ 49.238096] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.238737] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1bb601 [ 49.239397] page dumped because: kasan: bad access detected [ 49.239862] [ 49.240005] Memory state around the buggy address: [ 49.240427] ffff88800ee85780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 49.241049] ffff88800ee85800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 49.241688] >ffff88800ee85880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 49.242297] ^ [ 49.242598] ffff88800ee85900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.243243] ffff88800ee85980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 49.243820] ================================================================== [ 49.244708] Disabling lock debugging due to kernel taint [ 50.867216] BUG: Bad rss-counter state mm:00000000e2a36702 type:MM_FILEPAGES val:33 [ 50.867898] BUG: Bad rss-counter state mm:00000000e2a36702 type:MM_ANONPAGES val:22 [ 51.241761] BUG: Bad rss-counter state mm:000000007a4dfc9b type:MM_FILEPAGES val:33 [ 51.242979] BUG: Bad rss-counter state mm:000000007a4dfc9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52034' (ECDSA) to the list of known hosts. 2023/06/20 09:49:24 fuzzer started 2023/06/20 09:49:24 dialing manager at localhost:44161 2023/06/20 09:49:24 checking machine... 2023/06/20 09:49:24 checking revisions... [ 51.833510] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:49:25 testing simple program... [ 51.868545] cgroup: Unknown subsys name 'net' [ 51.900733] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:49:06 Registers: info registers vcpu 0 RAX=ffff88800d8c83c0 RBX=ffff8880167a9800 RCX=0000000000000000 RDX=1ffff11002cf5337 RSI=ffffffff83c196ab RDI=0000000000000001 RBP=ffff888015a97b68 RSP=ffff888015a978d8 R8 =0000000000000001 R9 =0000000000000003 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff8880167a99b8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff83c196d4 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 00007ff42b033700 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=00007fff21fa3988 CR3=000000000d8ee000 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=00007f0af37a6510000055cfb6c12790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002870f77 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800eaeb680 RSI=ffffffff8198959d RDI=ffff888013f7f268 RBP=ffff888013f7f268 RSP=ffff888014387b88 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888013f7efb8 R13=ffff888013f7efa8 R14=ffff888013f7ee88 R15=ffff888013f7eed8 RIP=ffffffff81992fc4 RFL=00000286 [--S--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 00007fcfd1b73900 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=00007fcfd212a618 CR3=000000001bb1e000 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