syzkaller login: [ 33.876797] BUG: Bad rss-counter state mm:00000000846c2f7a type:MM_FILEPAGES val:33 [ 33.878149] BUG: Bad rss-counter state mm:00000000846c2f7a type:MM_ANONPAGES val:22 [ 34.035739] ================================================================== [ 34.036639] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.037588] Read of size 8 at addr ffff8880147fb798 by task sshd/221 [ 34.038351] [ 34.038569] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.039541] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.040515] Call Trace: [ 34.040838] [ 34.041122] dump_stack_lvl+0x91/0xf0 [ 34.041640] print_report+0xcc/0x620 [ 34.042137] ? __virt_addr_valid+0x102/0x340 [ 34.042691] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.043328] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.043949] kasan_report+0xbe/0xf0 [ 34.044430] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.045043] vma_interval_tree_remove+0xc75/0xec0 [ 34.045642] vma_prepare+0xc54/0x11a0 [ 34.046126] __split_vma+0x5af/0x950 [ 34.046594] ? __pfx___split_vma+0x10/0x10 [ 34.047146] ? find_held_lock+0x2c/0x110 [ 34.047671] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.048236] ? lock_is_held_type+0x9f/0x120 [ 34.048775] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.049374] ? mtree_range_walk+0x632/0x900 [ 34.049923] ? mas_walk+0x5c7/0x7c0 [ 34.050405] do_vmi_munmap+0x1f1/0x2b0 [ 34.050904] mmap_region+0x1f9/0x2660 [ 34.051395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.051906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.052626] ? __pfx_lock_acquire+0x10/0x10 [ 34.053162] ? __pfx_mmap_region+0x10/0x10 [ 34.053704] ? security_mmap_addr+0x7d/0xa0 [ 34.054249] ? get_unmapped_area+0x1f5/0x3f0 [ 34.054809] do_mmap+0x854/0xf00 [ 34.055262] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.055756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.056313] ksys_mmap_pgoff+0x3af/0x500 [ 34.056818] do_syscall_64+0x3f/0x90 [ 34.057296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.057936] RIP: 0033:0x7f97e9f75d82 [ 34.058395] 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 [ 34.060519] RSP: 002b:00007ffe5999bdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.061410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97e9f75d82 [ 34.062252] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f97e93af000 [ 34.063091] RBP: 00007f97e93af000 R08: 0000000000000009 R09: 0000000000001000 [ 34.063925] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2c0563d90 [ 34.064768] R13: 00007ffe5999be10 R14: 00007ffe5999be40 R15: 00007ffe5999c1a0 [ 34.065610] [ 34.065901] [ 34.066115] Allocated by task 214: [ 34.066539] kasan_save_stack+0x22/0x50 [ 34.067051] kasan_set_track+0x25/0x30 [ 34.067539] __kasan_slab_alloc+0x59/0x70 [ 34.068055] kmem_cache_alloc+0x16b/0x370 [ 34.068573] vm_area_dup+0x20/0x160 [ 34.069027] __split_vma+0x170/0x950 [ 34.069489] split_vma+0xc6/0x110 [ 34.069925] mprotect_fixup+0x8d2/0xb30 [ 34.070446] do_mprotect_pkey+0x87e/0xd40 [ 34.070982] __x64_sys_mprotect+0x78/0xc0 [ 34.071495] do_syscall_64+0x3f/0x90 [ 34.071969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.072606] [ 34.072819] Freed by task 214: [ 34.073213] kasan_save_stack+0x22/0x50 [ 34.073710] kasan_set_track+0x25/0x30 [ 34.074201] kasan_save_free_info+0x2b/0x50 [ 34.074730] __kasan_slab_free+0x10a/0x190 [ 34.075279] kmem_cache_free+0x10d/0x4d0 [ 34.075788] rcu_core+0x8c8/0x2860 [ 34.076231] __do_softirq+0x1b7/0x7d4 [ 34.076717] [ 34.076933] Last potentially related work creation: [ 34.077514] kasan_save_stack+0x22/0x50 [ 34.078017] __kasan_record_aux_stack+0x8e/0xa0 [ 34.078588] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.079230] remove_vma+0x139/0x170 [ 34.079681] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.080236] do_vmi_munmap+0x1f1/0x2b0 [ 34.080718] __vm_munmap+0x138/0x3a0 [ 34.081178] __x64_sys_munmap+0x59/0x80 [ 34.081667] do_syscall_64+0x3f/0x90 [ 34.082133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.082774] [ 34.082988] The buggy address belongs to the object at ffff8880147fb740 [ 34.082988] which belongs to the cache vm_area_struct of size 168 [ 34.084449] The buggy address is located 88 bytes inside of [ 34.084449] freed 168-byte region [ffff8880147fb740, ffff8880147fb7e8) [ 34.085835] [ 34.086048] The buggy address belongs to the physical page: [ 34.086708] page:000000003aa902c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147fb [ 34.087802] memcg:ffff88800d2b3c01 [ 34.088222] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.088863] page_type: 0xffffffff() [ 34.089307] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.090213] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2b3c01 [ 34.091123] page dumped because: kasan: bad access detected [ 34.091787] [ 34.091999] Memory state around the buggy address: [ 34.092578] ffff8880147fb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.093428] ffff8880147fb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.094278] >ffff8880147fb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.095145] ^ [ 34.095635] ffff8880147fb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.096481] ffff8880147fb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.097321] ================================================================== [ 34.098426] Disabling lock debugging due to kernel taint [ 35.970192] BUG: Bad rss-counter state mm:000000001c4f538b type:MM_FILEPAGES val:33 [ 35.971362] BUG: Bad rss-counter state mm:000000001c4f538b type:MM_ANONPAGES val:22 [ 36.344399] BUG: Bad rss-counter state mm:000000009ba0abaa type:MM_FILEPAGES val:33 [ 36.345024] BUG: Bad rss-counter state mm:000000009ba0abaa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17389' (ECDSA) to the list of known hosts. 2023/06/19 23:18:20 fuzzer started 2023/06/19 23:18:20 dialing manager at localhost:44161 2023/06/19 23:18:20 checking machine... 2023/06/19 23:18:20 checking revisions... [ 36.999888] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:18:20 testing simple program... [ 37.057378] cgroup: Unknown subsys name 'net' [ 37.121629] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:18:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c134a RSI=ffffffff818d9dc6 RDI=ffff88806ce09a50 RBP=ffff88806ce09ae8 RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff88800effd1c0 R15=ffff88806ce09a50 RIP=ffffffff811305f1 RFL=00000212 [----A--] 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 00007f0e1b005900 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=00007f0e1b5ba650 CR3=000000000cc7c000 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=0000000080000000 RBX=ffff888019b86828 RCX=0000000000000000 RDX=ffff888009520000 RSI=ffffffff81b25d33 RDI=0000000000000006 RBP=00000000000001f5 RSP=ffff88800952f1e8 R8 =00000000000001f6 R9 =0000000000000100 R10=0000000000000100 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800952f638 R14=0000000000001b1f R15=00000000000001f5 RIP=ffffffff814c0800 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 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=00007fe4096d24b0 CR3=0000000009782000 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=acea5f1de964d5a5d54d0aa3be40849a XMM02=eff9b2d0a8fce9cb000000000011d910 XMM03=2c67c8bc2e329bc3000000000011da38 XMM04=be4016c70079292000000000000ae988 XMM05=8969e7ef160c005f0000000000135888 XMM06=5a9d233068761c4a00000000001346e8 XMM07=fb795ef6d65770560000000000124b60 XMM08=2c67c8bc2e329bc3000000000011da38 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000