syzkaller login: [ 34.859040] BUG: Bad rss-counter state mm:00000000852c943c type:MM_FILEPAGES val:33 [ 34.860307] BUG: Bad rss-counter state mm:00000000852c943c type:MM_ANONPAGES val:22 [ 34.982774] ================================================================== [ 34.983530] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.984287] Read of size 8 at addr ffff88800ed395c8 by task sshd/220 [ 34.984908] [ 34.985089] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.985866] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.986615] Call Trace: [ 34.986863] [ 34.987079] dump_stack_lvl+0x91/0xf0 [ 34.987464] print_report+0xcc/0x620 [ 34.987835] ? __virt_addr_valid+0x102/0x340 [ 34.988280] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.988755] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.989247] kasan_report+0xbe/0xf0 [ 34.989627] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.990111] vma_interval_tree_remove+0xc75/0xec0 [ 34.990588] vma_prepare+0xc54/0x11a0 [ 34.990969] __split_vma+0x5af/0x950 [ 34.991337] ? __pfx___split_vma+0x10/0x10 [ 34.991774] ? find_held_lock+0x2c/0x110 [ 34.992185] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.992630] ? lock_is_held_type+0x9f/0x120 [ 34.993061] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.993547] ? mtree_range_walk+0x632/0x900 [ 34.993983] ? mas_walk+0x5c7/0x7c0 [ 34.994360] do_vmi_munmap+0x1f1/0x2b0 [ 34.994742] mmap_region+0x1f9/0x2660 [ 34.995114] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.995519] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.996069] ? __pfx_lock_acquire+0x10/0x10 [ 34.996490] ? __pfx_mmap_region+0x10/0x10 [ 34.996903] ? security_mmap_addr+0x7d/0xa0 [ 34.997312] ? get_unmapped_area+0x1f5/0x3f0 [ 34.997740] do_mmap+0x854/0xf00 [ 34.998089] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.998479] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.998946] ksys_mmap_pgoff+0x3af/0x500 [ 34.999351] do_syscall_64+0x3f/0x90 [ 34.999739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.000245] RIP: 0033:0x7f9ca9981d82 [ 35.000602] 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 [ 35.002252] RSP: 002b:00007ffd5e53bd38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.002951] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ca9981d82 [ 35.003612] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ca8dbb000 [ 35.004281] RBP: 00007f9ca8dbb000 R08: 0000000000000009 R09: 0000000000001000 [ 35.004976] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597d66c3f60 [ 35.005645] R13: 00007ffd5e53bd50 R14: 00007ffd5e53bd80 R15: 00007ffd5e53c0e0 [ 35.006296] [ 35.006513] [ 35.006678] Allocated by task 213: [ 35.007025] kasan_save_stack+0x22/0x50 [ 35.007405] kasan_set_track+0x25/0x30 [ 35.007805] __kasan_slab_alloc+0x59/0x70 [ 35.008213] kmem_cache_alloc+0x16b/0x370 [ 35.008602] vm_area_dup+0x20/0x160 [ 35.008957] __split_vma+0x170/0x950 [ 35.009313] split_vma+0xc6/0x110 [ 35.009638] mprotect_fixup+0x8d2/0xb30 [ 35.010030] do_mprotect_pkey+0x87e/0xd40 [ 35.010436] __x64_sys_mprotect+0x78/0xc0 [ 35.010841] do_syscall_64+0x3f/0x90 [ 35.011211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.011721] [ 35.011890] Freed by task 213: [ 35.012195] kasan_save_stack+0x22/0x50 [ 35.012585] kasan_set_track+0x25/0x30 [ 35.012971] kasan_save_free_info+0x2b/0x50 [ 35.013379] __kasan_slab_free+0x10a/0x190 [ 35.013791] kmem_cache_free+0x10d/0x4d0 [ 35.014184] rcu_core+0x8c8/0x2860 [ 35.014534] __do_softirq+0x1b7/0x7d4 [ 35.014905] [ 35.015069] Last potentially related work creation: [ 35.015534] kasan_save_stack+0x22/0x50 [ 35.015924] __kasan_record_aux_stack+0x8e/0xa0 [ 35.016384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.016875] remove_vma+0x139/0x170 [ 35.017226] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.017658] do_vmi_munmap+0x1f1/0x2b0 [ 35.018030] __vm_munmap+0x138/0x3a0 [ 35.018402] __x64_sys_munmap+0x59/0x80 [ 35.018788] do_syscall_64+0x3f/0x90 [ 35.019154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.019663] [ 35.019829] The buggy address belongs to the object at ffff88800ed39570 [ 35.019829] which belongs to the cache vm_area_struct of size 168 [ 35.020993] The buggy address is located 88 bytes inside of [ 35.020993] freed 168-byte region [ffff88800ed39570, ffff88800ed39618) [ 35.022082] [ 35.022248] The buggy address belongs to the physical page: [ 35.022764] page:00000000622056d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed39 [ 35.023605] memcg:ffff88800bf2e101 [ 35.023935] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.024441] page_type: 0xffffffff() [ 35.024792] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.025494] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf2e101 [ 35.026206] page dumped because: kasan: bad access detected [ 35.026718] [ 35.026885] Memory state around the buggy address: [ 35.027337] ffff88800ed39480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.028003] ffff88800ed39500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 35.028675] >ffff88800ed39580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.029337] ^ [ 35.029855] ffff88800ed39600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.030522] ffff88800ed39680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.031186] ================================================================== [ 35.031970] Disabling lock debugging due to kernel taint [ 37.741389] BUG: Bad rss-counter state mm:0000000091f53fb3 type:MM_FILEPAGES val:33 [ 37.742558] BUG: Bad rss-counter state mm:0000000091f53fb3 type:MM_ANONPAGES val:22 [ 38.155849] BUG: Bad rss-counter state mm:00000000705e1249 type:MM_FILEPAGES val:33 [ 38.156441] BUG: Bad rss-counter state mm:00000000705e1249 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36023' (ECDSA) to the list of known hosts. 2023/06/20 01:33:53 fuzzer started 2023/06/20 01:33:54 dialing manager at localhost:44161 2023/06/20 01:33:54 checking machine... 2023/06/20 01:33:54 checking revisions... [ 38.853020] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:33:54 testing simple program... [ 38.906705] cgroup: Unknown subsys name 'net' [ 38.958541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:33:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110028ffec9 RSI=ffffffff81807f5b RDI=ffff8880147ff648 RBP=ffff8880147ff6e0 RSP=ffff8880147ff5d8 R8 =0000000000000001 R9 =ffff8880147ff688 R10=0000000000038001 R11=0000000000021edf R12=ffff8880147ff710 R13=0000000000000000 R14=ffff88800f8e0000 R15=ffff8880147ff648 RIP=ffffffff81130609 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 00007f42fd3f3900 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=000055b014574768 CR3=0000000009db6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c0bf76413ab2e3b000000000000ae988 XMM05=636580eb8ca5cee80000000000134700 XMM06=4fda316b135da52b00000000001337a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019c89b40 RBX=ffff88800f4cf960 RCX=ffffffff81132ffe RDX=ffff88800f4cf878 RSI=0000000000000000 RDI=ffff88800f4cf938 RBP=ffff888019c89b40 RSP=ffff88800f4cf878 R8 =0000000000000002 R9 =0000000000000000 R10=ffff88800f4cf8c8 R11=00000000000b6996 R12=0000000000000000 R13=ffff88800f4cf8f0 R14=ffff88800f4cf910 R15=ffff88800f4cf8c8 RIP=ffffffff81133010 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 00007eff03aec900 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=00007eff040a3618 CR3=000000000f50c000 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=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