syzkaller login: [ 30.915236] BUG: Bad rss-counter state mm:00000000c8527fce type:MM_FILEPAGES val:33 [ 30.916348] BUG: Bad rss-counter state mm:00000000c8527fce type:MM_ANONPAGES val:22 [ 30.961494] ================================================================== [ 30.962538] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.963561] Read of size 8 at addr ffff88800e44b3f8 by task sshd/220 [ 30.964361] [ 30.964587] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.965468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.966465] Call Trace: [ 30.966797] [ 30.967080] dump_stack_lvl+0x91/0xf0 [ 30.967571] print_report+0xcc/0x620 [ 30.968052] ? __virt_addr_valid+0x102/0x340 [ 30.968612] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.969222] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.969849] kasan_report+0xbe/0xf0 [ 30.970330] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.970952] vma_interval_tree_remove+0xc75/0xec0 [ 30.971553] vma_prepare+0xc54/0x11a0 [ 30.972031] __split_vma+0x5af/0x950 [ 30.972500] ? __pfx___split_vma+0x10/0x10 [ 30.973024] ? find_held_lock+0x2c/0x110 [ 30.973560] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.974122] ? lock_is_held_type+0x9f/0x120 [ 30.974670] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.975276] ? mtree_range_walk+0x632/0x900 [ 30.975831] ? mas_walk+0x5c7/0x7c0 [ 30.976310] do_vmi_munmap+0x1f1/0x2b0 [ 30.976799] mmap_region+0x1f9/0x2660 [ 30.977282] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.977810] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.978515] ? __pfx_lock_acquire+0x10/0x10 [ 30.979047] ? __pfx_mmap_region+0x10/0x10 [ 30.979574] ? security_mmap_addr+0x7d/0xa0 [ 30.980101] ? get_unmapped_area+0x1f5/0x3f0 [ 30.980647] do_mmap+0x854/0xf00 [ 30.981085] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.981593] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.982151] ksys_mmap_pgoff+0x3af/0x500 [ 30.982650] do_syscall_64+0x3f/0x90 [ 30.983123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.983767] RIP: 0033:0x7f5e19a69d82 [ 30.984225] 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 [ 30.986337] RSP: 002b:00007fffd664adc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.987239] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e19a69d82 [ 30.988094] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e18ea3000 [ 30.988939] RBP: 00007f5e18ea3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.989789] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556948ddbf70 [ 30.990630] R13: 00007fffd664ade0 R14: 00007fffd664ae10 R15: 00007fffd664b170 [ 30.991492] [ 30.991787] [ 30.992003] Allocated by task 213: [ 30.992432] kasan_save_stack+0x22/0x50 [ 30.992934] kasan_set_track+0x25/0x30 [ 30.993435] __kasan_slab_alloc+0x59/0x70 [ 30.993955] kmem_cache_alloc+0x16b/0x370 [ 30.994458] vm_area_dup+0x20/0x160 [ 30.994915] __split_vma+0x170/0x950 [ 30.995375] split_vma+0xc6/0x110 [ 30.995812] mprotect_fixup+0x8d2/0xb30 [ 30.996308] do_mprotect_pkey+0x87e/0xd40 [ 30.996832] __x64_sys_mprotect+0x78/0xc0 [ 30.997344] do_syscall_64+0x3f/0x90 [ 30.997850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.998506] [ 30.998730] Freed by task 213: [ 30.999119] kasan_save_stack+0x22/0x50 [ 30.999624] kasan_set_track+0x25/0x30 [ 31.000114] kasan_save_free_info+0x2b/0x50 [ 31.000646] __kasan_slab_free+0x10a/0x190 [ 31.001177] kmem_cache_free+0x10d/0x4d0 [ 31.001687] rcu_core+0x8c8/0x2860 [ 31.002129] __do_softirq+0x1b7/0x7d4 [ 31.002605] [ 31.002821] Last potentially related work creation: [ 31.003409] kasan_save_stack+0x22/0x50 [ 31.003910] __kasan_record_aux_stack+0x8e/0xa0 [ 31.004474] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.005122] remove_vma+0x139/0x170 [ 31.005574] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.006126] do_vmi_munmap+0x1f1/0x2b0 [ 31.006610] __vm_munmap+0x138/0x3a0 [ 31.007099] __x64_sys_munmap+0x59/0x80 [ 31.007595] do_syscall_64+0x3f/0x90 [ 31.008062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.008728] [ 31.008942] Second to last potentially related work creation: [ 31.009636] kasan_save_stack+0x22/0x50 [ 31.010139] __kasan_record_aux_stack+0x8e/0xa0 [ 31.010718] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.011359] remove_vma+0x139/0x170 [ 31.011805] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.012365] do_vmi_munmap+0x1f1/0x2b0 [ 31.012844] mmap_region+0x1f9/0x2660 [ 31.013329] do_mmap+0x854/0xf00 [ 31.013776] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.014261] ksys_mmap_pgoff+0x3af/0x500 [ 31.014763] do_syscall_64+0x3f/0x90 [ 31.015230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.015866] [ 31.016079] The buggy address belongs to the object at ffff88800e44b3a0 [ 31.016079] which belongs to the cache vm_area_struct of size 168 [ 31.017554] The buggy address is located 88 bytes inside of [ 31.017554] freed 168-byte region [ffff88800e44b3a0, ffff88800e44b448) [ 31.018956] [ 31.019168] The buggy address belongs to the physical page: [ 31.019813] page:00000000c0aafd1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe44b [ 31.020897] memcg:ffff88800cbe7e01 [ 31.021332] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.022036] page_type: 0xffffffff() [ 31.022487] raw: 0100000000000200 ffff8880087a0c80 ffffea0000355d40 dead000000000007 [ 31.023398] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbe7e01 [ 31.024292] page dumped because: kasan: bad access detected [ 31.024954] [ 31.025169] Memory state around the buggy address: [ 31.025763] ffff88800e44b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.026612] ffff88800e44b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.027463] >ffff88800e44b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.028302] ^ [ 31.029140] ffff88800e44b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.030024] ffff88800e44b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.030858] ================================================================== [ 31.031817] Disabling lock debugging due to kernel taint [ 32.858367] BUG: Bad rss-counter state mm:00000000cc3914ec type:MM_FILEPAGES val:33 [ 32.859351] BUG: Bad rss-counter state mm:00000000cc3914ec type:MM_ANONPAGES val:22 [ 33.382335] BUG: Bad rss-counter state mm:00000000a6e1aae7 type:MM_FILEPAGES val:33 [ 33.383471] BUG: Bad rss-counter state mm:00000000a6e1aae7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8594' (ECDSA) to the list of known hosts. 2023/06/20 11:59:13 fuzzer started 2023/06/20 11:59:13 dialing manager at localhost:36067 2023/06/20 11:59:13 checking machine... 2023/06/20 11:59:13 checking revisions... [ 34.090260] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:59:13 testing simple program... [ 34.143035] cgroup: Unknown subsys name 'net' [ 34.220370] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:59:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffd8cdbb588 CR3=0000000005482000 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=00007f63a9ea051000005607d7a40790 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=0000000000000000 RBX=0000000000000010 RCX=0000000000000000 RDX=ffff88801830d1c0 RSI=ffffffff844a5040 RDI=0000000000000006 RBP=ffff88800e2c4e08 RSP=ffff888016dd7ce0 R8 =0000000000000006 R9 =00007f5face950b0 R10=00007f5face8bfff R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=00007f5face950b0 R15=00007f5face8bfff RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5fac8dd900 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=00007f5face950b0 CR3=0000000009a50000 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=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