syzkaller login: [ 28.850296] BUG: Bad rss-counter state mm:00000000e2ad8036 type:MM_FILEPAGES val:33 [ 28.852462] BUG: Bad rss-counter state mm:00000000e2ad8036 type:MM_ANONPAGES val:22 [ 29.018573] ================================================================== [ 29.019476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.020426] Read of size 8 at addr ffff88800ec6a968 by task sshd/219 [ 29.021196] [ 29.021415] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.022308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.023293] Call Trace: [ 29.023611] [ 29.023899] dump_stack_lvl+0x91/0xf0 [ 29.024384] print_report+0xcc/0x620 [ 29.024864] ? __virt_addr_valid+0x102/0x340 [ 29.025419] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.026056] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.026677] kasan_report+0xbe/0xf0 [ 29.027148] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.027766] vma_interval_tree_remove+0xc75/0xec0 [ 29.028373] vma_prepare+0xc54/0x11a0 [ 29.028858] __split_vma+0x5af/0x950 [ 29.029319] ? __pfx___split_vma+0x10/0x10 [ 29.029870] ? find_held_lock+0x2c/0x110 [ 29.030396] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.030967] ? lock_is_held_type+0x9f/0x120 [ 29.031513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.032117] ? mtree_range_walk+0x632/0x900 [ 29.032673] ? mas_walk+0x5c7/0x7c0 [ 29.033144] do_vmi_munmap+0x1f1/0x2b0 [ 29.033643] mmap_region+0x1f9/0x2660 [ 29.034125] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.034633] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.035335] ? __pfx_lock_acquire+0x10/0x10 [ 29.035875] ? __pfx_mmap_region+0x10/0x10 [ 29.036411] ? security_mmap_addr+0x7d/0xa0 [ 29.036949] ? get_unmapped_area+0x1f5/0x3f0 [ 29.037508] do_mmap+0x854/0xf00 [ 29.037951] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.038454] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.039021] ksys_mmap_pgoff+0x3af/0x500 [ 29.039540] do_syscall_64+0x3f/0x90 [ 29.040026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.040670] RIP: 0033:0x7fa50c9ecd82 [ 29.041123] 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 [ 29.043297] RSP: 002b:00007ffcc0e87a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.044217] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa50c9ecd82 [ 29.045080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa50be26000 [ 29.045949] RBP: 00007fa50be26000 R08: 0000000000000009 R09: 0000000000001000 [ 29.046807] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bec470eec0 [ 29.047658] R13: 00007ffcc0e87ab0 R14: 00007ffcc0e87ae0 R15: 00007ffcc0e87e40 [ 29.048526] [ 29.048821] [ 29.049042] Allocated by task 212: [ 29.049489] kasan_save_stack+0x22/0x50 [ 29.050003] kasan_set_track+0x25/0x30 [ 29.050493] __kasan_slab_alloc+0x59/0x70 [ 29.051013] kmem_cache_alloc+0x16b/0x370 [ 29.051531] vm_area_dup+0x20/0x160 [ 29.051985] __split_vma+0x170/0x950 [ 29.052444] split_vma+0xc6/0x110 [ 29.052880] mprotect_fixup+0x8d2/0xb30 [ 29.053390] do_mprotect_pkey+0x87e/0xd40 [ 29.053914] __x64_sys_mprotect+0x78/0xc0 [ 29.054429] do_syscall_64+0x3f/0x90 [ 29.054904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.055533] [ 29.055745] Freed by task 212: [ 29.056138] kasan_save_stack+0x22/0x50 [ 29.056650] kasan_set_track+0x25/0x30 [ 29.057142] kasan_save_free_info+0x2b/0x50 [ 29.057678] __kasan_slab_free+0x10a/0x190 [ 29.058217] kmem_cache_free+0x10d/0x4d0 [ 29.058721] rcu_core+0x8c8/0x2860 [ 29.059160] __do_softirq+0x1b7/0x7d4 [ 29.059638] [ 29.059856] Last potentially related work creation: [ 29.060450] kasan_save_stack+0x22/0x50 [ 29.060947] __kasan_record_aux_stack+0x8e/0xa0 [ 29.061531] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.062186] remove_vma+0x139/0x170 [ 29.062643] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.063206] do_vmi_munmap+0x1f1/0x2b0 [ 29.063685] __vm_munmap+0x138/0x3a0 [ 29.064140] __x64_sys_munmap+0x59/0x80 [ 29.064641] do_syscall_64+0x3f/0x90 [ 29.065114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.065762] [ 29.065979] Second to last potentially related work creation: [ 29.066666] kasan_save_stack+0x22/0x50 [ 29.067179] __kasan_record_aux_stack+0x8e/0xa0 [ 29.067753] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.068402] remove_vma+0x139/0x170 [ 29.068860] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.069418] do_vmi_munmap+0x1f1/0x2b0 [ 29.070085] mmap_region+0x1f9/0x2660 [ 29.070546] do_mmap+0x854/0xf00 [ 29.070966] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.071434] ksys_mmap_pgoff+0x3af/0x500 [ 29.071916] do_syscall_64+0x3f/0x90 [ 29.072370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.072982] [ 29.073198] The buggy address belongs to the object at ffff88800ec6a910 [ 29.073198] which belongs to the cache vm_area_struct of size 168 [ 29.074634] The buggy address is located 88 bytes inside of [ 29.074634] freed 168-byte region [ffff88800ec6a910, ffff88800ec6a9b8) [ 29.076184] [ 29.076390] The buggy address belongs to the physical page: [ 29.077030] page:00000000aa1fb0f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec6a [ 29.078082] memcg:ffff88800c893801 [ 29.078488] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.079163] page_type: 0xffffffff() [ 29.079600] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 29.080477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c893801 [ 29.081338] page dumped because: kasan: bad access detected [ 29.082001] [ 29.082213] Memory state around the buggy address: [ 29.082765] ffff88800ec6a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.083585] ffff88800ec6a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.084399] >ffff88800ec6a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.085220] ^ [ 29.085980] ffff88800ec6a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.086795] ffff88800ec6aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.087643] ================================================================== [ 29.088970] Disabling lock debugging due to kernel taint [ 31.033042] sshd (219) used greatest stack depth: 24128 bytes left [ 31.033862] BUG: Bad rss-counter state mm:000000007ecd292f type:MM_FILEPAGES val:33 [ 31.034917] BUG: Bad rss-counter state mm:000000007ecd292f type:MM_ANONPAGES val:22 [ 31.522424] BUG: Bad rss-counter state mm:0000000080558875 type:MM_FILEPAGES val:33 [ 31.523588] BUG: Bad rss-counter state mm:0000000080558875 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19724' (ECDSA) to the list of known hosts. 2023/06/20 19:58:23 fuzzer started 2023/06/20 19:58:23 dialing manager at localhost:36067 2023/06/20 19:58:23 checking machine... 2023/06/20 19:58:23 checking revisions... [ 32.278188] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:58:23 testing simple program... [ 32.321396] cgroup: Unknown subsys name 'net' [ 32.384418] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:58:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b38 RCX=0000000000000001 RDX=1ffff1100d9c137d RSI=ffffffff8460144a RDI=ffff88806ce09b44 RBP=ffff88806ce09be8 RSP=ffff88806ce09a50 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff888015deb680 R15=ffff88800da1a980 RIP=ffffffff813ad547 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 00007f201ed1a900 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=00007f201f2cf650 CR3=000000000c5ca000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000123e48 RCX=00007f3de8404344 RDX=00007ffeb24791c8 RSI=00007ffeb24791c8 RDI=0000559fe7502330 RBP=00007ffeb2479248 RSP=00007ffeb24791c0 R8 =0000000000000768 R9 =0000000000123e48 R10=0000000000000002 R11=00007f3de6da1910 R12=00007f3de6d8fe48 R13=0000559fe7501530 R14=0000000000000006 R15=00007ffeb24791d0 RIP=00007f3de8404475 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3de7881900 00000000 00000000 GS =0000 0000000000000000 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=00007f3de6ce3f40 CR3=000000001458e000 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=b3285ca56c489dff000000000010da10 XMM01=7bb09d6d1cf2318b664ebea88ca46782 XMM02=ec2efd57dc4c00df000000000011fe68 XMM03=a4bd2c205782db60000000000011ff38 XMM04=5dfc74263fa9ffe600000000000ae988 XMM05=d8d3e1a29248e01e00000000001351c8 XMM06=4fda316b135da52b0000000000134268 XMM07=e042d86d42eb936e0000000000122af0 XMM08=a4bd2c205782db60000000000011ff38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000