syzkaller login: [ 28.011751] BUG: Bad rss-counter state mm:00000000a98604e6 type:MM_FILEPAGES val:33 [ 28.013754] BUG: Bad rss-counter state mm:00000000a98604e6 type:MM_ANONPAGES val:22 [ 28.169249] ================================================================== [ 28.170168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.171117] Read of size 8 at addr ffff88800da62c20 by task sshd/220 [ 28.171887] [ 28.172105] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.173157] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.174142] Call Trace: [ 28.174464] [ 28.174776] dump_stack_lvl+0x91/0xf0 [ 28.175295] print_report+0xcc/0x620 [ 28.175787] ? __virt_addr_valid+0x102/0x340 [ 28.176351] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.176980] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.177608] kasan_report+0xbe/0xf0 [ 28.178081] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.178703] vma_interval_tree_remove+0xc75/0xec0 [ 28.179327] vma_prepare+0xc54/0x11a0 [ 28.179820] __split_vma+0x5af/0x950 [ 28.180296] ? __pfx___split_vma+0x10/0x10 [ 28.180839] ? find_held_lock+0x2c/0x110 [ 28.181361] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.181936] ? lock_is_held_type+0x9f/0x120 [ 28.182479] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.183100] ? mtree_range_walk+0x632/0x900 [ 28.183658] ? mas_walk+0x5c7/0x7c0 [ 28.184137] do_vmi_munmap+0x1f1/0x2b0 [ 28.184630] mmap_region+0x1f9/0x2660 [ 28.185111] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.185629] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.186343] ? __pfx_lock_acquire+0x10/0x10 [ 28.186894] ? __pfx_mmap_region+0x10/0x10 [ 28.187425] ? security_mmap_addr+0x7d/0xa0 [ 28.187959] ? get_unmapped_area+0x1f5/0x3f0 [ 28.188507] do_mmap+0x854/0xf00 [ 28.188948] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.189444] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.190003] ksys_mmap_pgoff+0x3af/0x500 [ 28.190510] do_syscall_64+0x3f/0x90 [ 28.190997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.191640] RIP: 0033:0x7f40037e2d82 [ 28.192091] 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 [ 28.194236] RSP: 002b:00007fff306a39d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.195149] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40037e2d82 [ 28.195998] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4002c1c000 [ 28.196837] RBP: 00007f4002c1c000 R08: 0000000000000009 R09: 0000000000001000 [ 28.197686] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563966bbfec0 [ 28.198524] R13: 00007fff306a39f0 R14: 00007fff306a3a20 R15: 00007fff306a3d80 [ 28.199407] [ 28.199703] [ 28.199921] Allocated by task 213: [ 28.200353] kasan_save_stack+0x22/0x50 [ 28.200860] kasan_set_track+0x25/0x30 [ 28.201355] __kasan_slab_alloc+0x59/0x70 [ 28.201891] kmem_cache_alloc+0x16b/0x370 [ 28.202407] vm_area_dup+0x20/0x160 [ 28.202876] __split_vma+0x170/0x950 [ 28.203341] split_vma+0xc6/0x110 [ 28.203779] mprotect_fixup+0x8d2/0xb30 [ 28.204278] do_mprotect_pkey+0x87e/0xd40 [ 28.204805] __x64_sys_mprotect+0x78/0xc0 [ 28.205321] do_syscall_64+0x3f/0x90 [ 28.205796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.206435] [ 28.206654] Freed by task 213: [ 28.207060] kasan_save_stack+0x22/0x50 [ 28.207569] kasan_set_track+0x25/0x30 [ 28.208066] kasan_save_free_info+0x2b/0x50 [ 28.208593] __kasan_slab_free+0x10a/0x190 [ 28.209127] kmem_cache_free+0x10d/0x4d0 [ 28.209634] rcu_core+0x8c8/0x2860 [ 28.210077] __do_softirq+0x1b7/0x7d4 [ 28.210553] [ 28.210778] Last potentially related work creation: [ 28.211373] kasan_save_stack+0x22/0x50 [ 28.211879] __kasan_record_aux_stack+0x8e/0xa0 [ 28.212449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.213090] remove_vma+0x139/0x170 [ 28.213550] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.214182] do_vmi_munmap+0x1f1/0x2b0 [ 28.214668] __vm_munmap+0x138/0x3a0 [ 28.215149] __x64_sys_munmap+0x59/0x80 [ 28.215643] do_syscall_64+0x3f/0x90 [ 28.216119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.216760] [ 28.216972] The buggy address belongs to the object at ffff88800da62bc8 [ 28.216972] which belongs to the cache vm_area_struct of size 168 [ 28.218430] The buggy address is located 88 bytes inside of [ 28.218430] freed 168-byte region [ffff88800da62bc8, ffff88800da62c70) [ 28.219850] [ 28.220067] The buggy address belongs to the physical page: [ 28.220763] page:00000000304f11ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda62 [ 28.221850] memcg:ffff8880141bf801 [ 28.222278] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.222939] page_type: 0xffffffff() [ 28.223394] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 28.224317] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880141bf801 [ 28.225221] page dumped because: kasan: bad access detected [ 28.225885] [ 28.226102] Memory state around the buggy address: [ 28.226689] ffff88800da62b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.227563] ffff88800da62b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.228417] >ffff88800da62c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.229277] ^ [ 28.229808] ffff88800da62c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.230663] ffff88800da62d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.231525] ================================================================== [ 28.232511] Disabling lock debugging due to kernel taint [ 30.479721] BUG: Bad rss-counter state mm:00000000f6fa710f type:MM_FILEPAGES val:33 [ 30.480869] BUG: Bad rss-counter state mm:00000000f6fa710f type:MM_ANONPAGES val:22 [ 30.995135] BUG: Bad rss-counter state mm:00000000ad6ac17a type:MM_FILEPAGES val:33 [ 30.996149] BUG: Bad rss-counter state mm:00000000ad6ac17a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61017' (ECDSA) to the list of known hosts. 2023/06/20 07:43:08 fuzzer started 2023/06/20 07:43:09 dialing manager at localhost:44161 2023/06/20 07:43:09 checking machine... 2023/06/20 07:43:09 checking revisions... [ 31.750514] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:43:09 testing simple program... [ 31.800441] cgroup: Unknown subsys name 'net' [ 31.841193] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:43:04 Registers: info registers vcpu 0 RAX=ffffffff863dc5cb RBX=0000000000000001 RCX=ffffffff863dc5c6 RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff85fbffd0 RBP=ffff88800f24f600 RSP=ffff88800f24f538 R8 =ffffffff863dc5c6 R9 =ffff88800f24f5e8 R10=0000000000038001 R11=0000000000091aff R12=ffff88800f24f608 R13=ffff88800f24f5f0 R14=ffff88800f24f5e9 R15=ffff88800f24f5a8 RIP=ffffffff81130a72 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 00007f8b32900900 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=00007f8b32eb7618 CR3=000000000c50c000 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=0000000000000001 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=00007f3ae9301320 CR3=0000000013b64000 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=e605fa7e190dc6a0904f722e985ca6ed XMM02=000000000011d668eff9b2d0a8fce9cb XMM03=000000000011d7382c67c8bc2e329bc3 XMM04=143a15bf61e2ed6300000000000ae988 XMM05=19e9129bd510f23500000000001330d8 XMM06=4fda316b135da52b0000000000132f60 XMM07=e042d86d42eb936e0000000000123800 XMM08=6f02f5011ca3d2a2000000000011d738 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000