syzkaller login: [ 32.012349] BUG: Bad rss-counter state mm:000000002fa1b34c type:MM_FILEPAGES val:33 [ 32.013636] BUG: Bad rss-counter state mm:000000002fa1b34c type:MM_ANONPAGES val:22 [ 32.111842] ================================================================== [ 32.112980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.114011] Read of size 8 at addr ffff88800fd6f5c8 by task sshd/220 [ 32.114862] [ 32.115103] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.116089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.117169] Call Trace: [ 32.117522] [ 32.117836] dump_stack_lvl+0x91/0xf0 [ 32.118377] print_report+0xcc/0x620 [ 32.118910] ? __virt_addr_valid+0x102/0x340 [ 32.119549] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.120238] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.120863] kasan_report+0xbe/0xf0 [ 32.121340] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.121960] vma_interval_tree_remove+0xc75/0xec0 [ 32.122565] vma_prepare+0xc54/0x11a0 [ 32.123047] __split_vma+0x5af/0x950 [ 32.123535] ? __pfx___split_vma+0x10/0x10 [ 32.124081] ? find_held_lock+0x2c/0x110 [ 32.124611] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.125191] ? lock_is_held_type+0x9f/0x120 [ 32.125742] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.126353] ? mtree_range_walk+0x632/0x900 [ 32.126907] ? mas_walk+0x5c7/0x7c0 [ 32.127407] do_vmi_munmap+0x1f1/0x2b0 [ 32.127900] mmap_region+0x1f9/0x2660 [ 32.128385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.128904] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.129625] ? __pfx_lock_acquire+0x10/0x10 [ 32.130169] ? __pfx_mmap_region+0x10/0x10 [ 32.130702] ? security_mmap_addr+0x7d/0xa0 [ 32.131239] ? get_unmapped_area+0x1f5/0x3f0 [ 32.131786] do_mmap+0x854/0xf00 [ 32.132226] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.132727] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.133283] ksys_mmap_pgoff+0x3af/0x500 [ 32.133793] do_syscall_64+0x3f/0x90 [ 32.134280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.134938] RIP: 0033:0x7f5c8d838d82 [ 32.135406] 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 [ 32.137535] RSP: 002b:00007ffffd309428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.138456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c8d838d82 [ 32.139327] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c8cc72000 [ 32.140185] RBP: 00007f5c8cc72000 R08: 0000000000000009 R09: 0000000000001000 [ 32.141156] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d39c08ec0 [ 32.142147] R13: 00007ffffd309440 R14: 00007ffffd309470 R15: 00007ffffd3097d0 [ 32.143139] [ 32.143479] [ 32.143727] Allocated by task 213: [ 32.144223] kasan_save_stack+0x22/0x50 [ 32.144784] kasan_set_track+0x25/0x30 [ 32.145329] __kasan_slab_alloc+0x59/0x70 [ 32.145910] kmem_cache_alloc+0x16b/0x370 [ 32.146488] vm_area_dup+0x20/0x160 [ 32.147009] __split_vma+0x170/0x950 [ 32.147591] split_vma+0xc6/0x110 [ 32.148076] mprotect_fixup+0x8d2/0xb30 [ 32.148643] do_mprotect_pkey+0x87e/0xd40 [ 32.149216] __x64_sys_mprotect+0x78/0xc0 [ 32.149798] do_syscall_64+0x3f/0x90 [ 32.150320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.151033] [ 32.151292] Freed by task 213: [ 32.151740] kasan_save_stack+0x22/0x50 [ 32.152298] kasan_set_track+0x25/0x30 [ 32.152845] kasan_save_free_info+0x2b/0x50 [ 32.153439] __kasan_slab_free+0x10a/0x190 [ 32.154026] kmem_cache_free+0x10d/0x4d0 [ 32.154590] rcu_core+0x8c8/0x2860 [ 32.155094] __do_softirq+0x1b7/0x7d4 [ 32.155647] [ 32.155885] Last potentially related work creation: [ 32.156538] kasan_save_stack+0x22/0x50 [ 32.157106] __kasan_record_aux_stack+0x8e/0xa0 [ 32.157750] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.158466] remove_vma+0x139/0x170 [ 32.158968] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.159596] do_vmi_munmap+0x1f1/0x2b0 [ 32.160149] __vm_munmap+0x138/0x3a0 [ 32.160678] __x64_sys_munmap+0x59/0x80 [ 32.161231] do_syscall_64+0x3f/0x90 [ 32.161754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.162465] [ 32.162703] The buggy address belongs to the object at ffff88800fd6f570 [ 32.162703] which belongs to the cache vm_area_struct of size 168 [ 32.164349] The buggy address is located 88 bytes inside of [ 32.164349] freed 168-byte region [ffff88800fd6f570, ffff88800fd6f618) [ 32.165906] [ 32.166145] The buggy address belongs to the physical page: [ 32.166884] page:00000000eec52d49 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd6f [ 32.168099] memcg:ffff8880169ca101 [ 32.168573] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.169295] page_type: 0xffffffff() [ 32.169794] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.170812] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169ca101 [ 32.171826] page dumped because: kasan: bad access detected [ 32.172562] [ 32.172803] Memory state around the buggy address: [ 32.173446] ffff88800fd6f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.174391] ffff88800fd6f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.175349] >ffff88800fd6f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.176300] ^ [ 32.177036] ffff88800fd6f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.177984] ffff88800fd6f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.178931] ================================================================== [ 32.180203] Disabling lock debugging due to kernel taint [ 34.430626] BUG: Bad rss-counter state mm:0000000059bc6f29 type:MM_FILEPAGES val:33 [ 34.432146] BUG: Bad rss-counter state mm:0000000059bc6f29 type:MM_ANONPAGES val:22 [ 34.896352] BUG: Bad rss-counter state mm:000000001f7e00b3 type:MM_FILEPAGES val:33 [ 34.897628] BUG: Bad rss-counter state mm:000000001f7e00b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26254' (ECDSA) to the list of known hosts. 2023/06/20 02:51:20 fuzzer started 2023/06/20 02:51:20 dialing manager at localhost:44161 2023/06/20 02:51:20 checking machine... 2023/06/20 02:51:20 checking revisions... [ 35.591985] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:51:20 testing simple program... [ 35.639690] cgroup: Unknown subsys name 'net' [ 35.696034] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:51:20 Registers: info registers vcpu 0 RAX=ffff888010168001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888010167f01 RSI=ffff888010167f50 RDI=ffff888010167970 RBP=ffff8880101679b8 RSP=ffff8880101678d8 R8 =ffffffff864b024a R9 =ffff8880101679a0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880101679c0 R13=ffff888010160000 R14=ffff888010167f58 R15=ffff888010167960 RIP=ffffffff811304d1 RFL=00000296 [--S-AP-] 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 00007f0bdf9e4900 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=00007f0bdff9b618 CR3=000000001b120000 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=00007fc70d6fe350 CR3=000000000d9d4000 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=0b6565fe575034aae14b8fd04206cbfb XMM02=ec2efd57dc4c00df000000000011d0d0 XMM03=985c9016b33304b3000000000011d1a0 XMM04=6d03f606498945ef00000000000ae988 XMM05=19e9129bd510f2350000000000134218 XMM06=55a0d4d8588210e30000000000133080 XMM07=e042d86d42eb936e0000000000124900 XMM08=985c9016b33304b3000000000011d1a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000