syzkaller login: [ 30.640606] sshd (214) used greatest stack depth: 24128 bytes left [ 30.641523] BUG: Bad rss-counter state mm:00000000dd32bbd4 type:MM_FILEPAGES val:33 [ 30.642876] BUG: Bad rss-counter state mm:00000000dd32bbd4 type:MM_ANONPAGES val:22 [ 30.815245] ================================================================== [ 30.816322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.817456] Read of size 8 at addr ffff888015d65ed8 by task sshd/221 [ 30.818393] [ 30.818610] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.819480] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.820486] Call Trace: [ 30.820815] [ 30.821106] dump_stack_lvl+0x91/0xf0 [ 30.821610] print_report+0xcc/0x620 [ 30.822110] ? __virt_addr_valid+0x102/0x340 [ 30.822672] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823419] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.824178] kasan_report+0xbe/0xf0 [ 30.824766] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.825543] vma_interval_tree_remove+0xc75/0xec0 [ 30.826301] vma_prepare+0xc54/0x11a0 [ 30.826897] __split_vma+0x5af/0x950 [ 30.827492] ? __pfx___split_vma+0x10/0x10 [ 30.828145] ? find_held_lock+0x2c/0x110 [ 30.828798] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.829498] ? lock_is_held_type+0x9f/0x120 [ 30.830162] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.830876] ? mtree_range_walk+0x632/0x900 [ 30.831526] ? mas_walk+0x5c7/0x7c0 [ 30.832081] do_vmi_munmap+0x1f1/0x2b0 [ 30.832659] mmap_region+0x1f9/0x2660 [ 30.833229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.833834] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.834692] ? __pfx_lock_acquire+0x10/0x10 [ 30.835308] ? __pfx_mmap_region+0x10/0x10 [ 30.835926] ? security_mmap_addr+0x7d/0xa0 [ 30.836554] ? get_unmapped_area+0x1f5/0x3f0 [ 30.837222] do_mmap+0x854/0xf00 [ 30.837736] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.838305] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.838949] ksys_mmap_pgoff+0x3af/0x500 [ 30.839537] do_syscall_64+0x3f/0x90 [ 30.840087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.840829] RIP: 0033:0x7eff8042dd82 [ 30.841368] 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 [ 30.843824] RSP: 002b:00007ffe007c7fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.844907] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff8042dd82 [ 30.845942] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff7f867000 [ 30.846955] RBP: 00007eff7f867000 R08: 0000000000000009 R09: 0000000000001000 [ 30.847966] R10: 0000000000000812 R11: 0000000000000206 R12: 000056303acaaf70 [ 30.848978] R13: 00007ffe007c7ff0 R14: 00007ffe007c8020 R15: 00007ffe007c8380 [ 30.850017] [ 30.850363] [ 30.850621] Allocated by task 214: [ 30.851130] kasan_save_stack+0x22/0x50 [ 30.851733] kasan_set_track+0x25/0x30 [ 30.852326] __kasan_slab_alloc+0x59/0x70 [ 30.852951] kmem_cache_alloc+0x16b/0x370 [ 30.853598] vm_area_dup+0x20/0x160 [ 30.854139] __split_vma+0x170/0x950 [ 30.854700] split_vma+0xc6/0x110 [ 30.855219] mprotect_fixup+0x8d2/0xb30 [ 30.855811] do_mprotect_pkey+0x87e/0xd40 [ 30.856432] __x64_sys_mprotect+0x78/0xc0 [ 30.857051] do_syscall_64+0x3f/0x90 [ 30.857621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.858380] [ 30.858634] Freed by task 214: [ 30.859161] kasan_save_stack+0x22/0x50 [ 30.859768] kasan_set_track+0x25/0x30 [ 30.860356] kasan_save_free_info+0x2b/0x50 [ 30.860987] __kasan_slab_free+0x10a/0x190 [ 30.861636] kmem_cache_free+0x10d/0x4d0 [ 30.862235] rcu_core+0x8c8/0x2860 [ 30.862761] __do_softirq+0x1b7/0x7d4 [ 30.863326] [ 30.863584] Last potentially related work creation: [ 30.864278] kasan_save_stack+0x22/0x50 [ 30.864873] __kasan_record_aux_stack+0x8e/0xa0 [ 30.865555] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.866317] remove_vma+0x139/0x170 [ 30.866851] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.867512] do_vmi_munmap+0x1f1/0x2b0 [ 30.868086] __vm_munmap+0x138/0x3a0 [ 30.868637] __x64_sys_munmap+0x59/0x80 [ 30.869218] do_syscall_64+0x3f/0x90 [ 30.869774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.870520] [ 30.870771] The buggy address belongs to the object at ffff888015d65e80 [ 30.870771] which belongs to the cache vm_area_struct of size 168 [ 30.872484] The buggy address is located 88 bytes inside of [ 30.872484] freed 168-byte region [ffff888015d65e80, ffff888015d65f28) [ 30.874177] [ 30.874440] The buggy address belongs to the physical page: [ 30.875219] page:00000000a9df699e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d65 [ 30.876512] memcg:ffff88800fd5fd01 [ 30.877017] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.877809] page_type: 0xffffffff() [ 30.878340] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.879427] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd5fd01 [ 30.880508] page dumped because: kasan: bad access detected [ 30.881324] [ 30.881577] Memory state around the buggy address: [ 30.882280] ffff888015d65d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.883315] ffff888015d65e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.884361] >ffff888015d65e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.885397] ^ [ 30.886266] ffff888015d65f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.887308] ffff888015d65f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.888330] ================================================================== [ 30.889500] Disabling lock debugging due to kernel taint [ 33.952721] BUG: Bad rss-counter state mm:00000000ada50733 type:MM_FILEPAGES val:33 [ 33.953985] BUG: Bad rss-counter state mm:00000000ada50733 type:MM_ANONPAGES val:22 [ 34.424323] BUG: Bad rss-counter state mm:00000000a7edbe61 type:MM_FILEPAGES val:33 [ 34.425520] BUG: Bad rss-counter state mm:00000000a7edbe61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22167' (ECDSA) to the list of known hosts. 2023/06/21 01:45:33 fuzzer started 2023/06/21 01:45:33 dialing manager at localhost:36067 2023/06/21 01:45:33 checking machine... 2023/06/21 01:45:33 checking revisions... [ 35.152833] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:45:33 testing simple program... [ 35.191586] cgroup: Unknown subsys name 'net' [ 35.276246] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:45:33 Registers: info registers vcpu 0 RAX=ffffffff86138976 RBX=0000000000000001 RCX=ffffffff81809adc RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffff888008d9f9d0 RSP=ffff888008d9f8f0 R8 =ffffffff86138976 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbd RFL=00000282 [--S----] 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 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=00007f98d1e05650 CR3=000000001c906000 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=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810711 RSP=ffff888008e37cb8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000200 R13=0000000000000001 R14=ffffffff813782f8 R15=ffff88800c7d3228 RIP=ffffffff8135b960 RFL=00000016 [----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 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=00007fa934d02f00 CR3=000000000c9a2000 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=205068368f04a791bd41e708d17f8247 XMM02=000000000011cb70d59e07bde36eea69 XMM03=000000000011cc98ec2efd57dc4c00df XMM04=14fe6ab6b582a1ba00000000000ae988 XMM05=6fbc5da6186abec90000000000132490 XMM06=c291bd5c70af25b90000000000131280 XMM07=fb795ef6d65770560000000000121360 XMM08=2c67c8bc2e329bc3000000000011cc98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000