syzkaller login: [ 38.645031] BUG: Bad rss-counter state mm:000000009b9c925c type:MM_FILEPAGES val:33 [ 38.646084] BUG: Bad rss-counter state mm:000000009b9c925c type:MM_ANONPAGES val:22 [ 38.808368] ================================================================== [ 38.809453] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.810555] Read of size 8 at addr ffff88800e0d1d08 by task sshd/219 [ 38.811566] [ 38.811785] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.812646] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.813648] Call Trace: [ 38.813964] [ 38.814258] dump_stack_lvl+0x91/0xf0 [ 38.814745] print_report+0xcc/0x620 [ 38.815233] ? __virt_addr_valid+0x102/0x340 [ 38.815793] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.816414] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.817045] kasan_report+0xbe/0xf0 [ 38.817538] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.818153] vma_interval_tree_remove+0xc75/0xec0 [ 38.818749] vma_prepare+0xc54/0x11a0 [ 38.819222] __split_vma+0x5af/0x950 [ 38.819692] ? __pfx___split_vma+0x10/0x10 [ 38.820232] ? find_held_lock+0x2c/0x110 [ 38.820762] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.821366] ? lock_is_held_type+0x9f/0x120 [ 38.821923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.822533] ? mtree_range_walk+0x632/0x900 [ 38.823094] ? mas_walk+0x5c7/0x7c0 [ 38.823583] do_vmi_munmap+0x1f1/0x2b0 [ 38.824086] mmap_region+0x1f9/0x2660 [ 38.824571] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.825093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.825823] ? __pfx_lock_acquire+0x10/0x10 [ 38.826360] ? __pfx_mmap_region+0x10/0x10 [ 38.826898] ? security_mmap_addr+0x7d/0xa0 [ 38.827436] ? get_unmapped_area+0x1f5/0x3f0 [ 38.827987] do_mmap+0x854/0xf00 [ 38.828426] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.828920] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.829492] ksys_mmap_pgoff+0x3af/0x500 [ 38.829998] do_syscall_64+0x3f/0x90 [ 38.830475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.831118] RIP: 0033:0x7fdb2a395d82 [ 38.831571] 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 [ 38.833785] RSP: 002b:00007ffc6bebf5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.834707] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb2a395d82 [ 38.835686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb297cf000 [ 38.836631] RBP: 00007fdb297cf000 R08: 0000000000000009 R09: 0000000000001000 [ 38.837790] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4789d1ec0 [ 38.838801] R13: 00007ffc6bebf610 R14: 00007ffc6bebf640 R15: 00007ffc6bebf9a0 [ 38.839879] [ 38.840270] [ 38.840573] Allocated by task 212: [ 38.841058] kasan_save_stack+0x22/0x50 [ 38.841616] kasan_set_track+0x25/0x30 [ 38.842283] __kasan_slab_alloc+0x59/0x70 [ 38.843002] kmem_cache_alloc+0x16b/0x370 [ 38.843587] vm_area_dup+0x20/0x160 [ 38.844097] __split_vma+0x170/0x950 [ 38.844723] split_vma+0xc6/0x110 [ 38.845323] mprotect_fixup+0x8d2/0xb30 [ 38.845927] do_mprotect_pkey+0x87e/0xd40 [ 38.846477] __x64_sys_mprotect+0x78/0xc0 [ 38.847193] do_syscall_64+0x3f/0x90 [ 38.847842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.848562] [ 38.848781] Freed by task 212: [ 38.849184] kasan_save_stack+0x22/0x50 [ 38.849728] kasan_set_track+0x25/0x30 [ 38.850229] kasan_save_free_info+0x2b/0x50 [ 38.850767] __kasan_slab_free+0x10a/0x190 [ 38.851307] kmem_cache_free+0x10d/0x4d0 [ 38.851824] rcu_core+0x8c8/0x2860 [ 38.852277] __do_softirq+0x1b7/0x7d4 [ 38.852866] [ 38.853087] Last potentially related work creation: [ 38.853684] kasan_save_stack+0x22/0x50 [ 38.854191] __kasan_record_aux_stack+0x8e/0xa0 [ 38.854768] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.855416] remove_vma+0x139/0x170 [ 38.855870] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.856430] do_vmi_munmap+0x1f1/0x2b0 [ 38.856919] __vm_munmap+0x138/0x3a0 [ 38.857395] __x64_sys_munmap+0x59/0x80 [ 38.857891] do_syscall_64+0x3f/0x90 [ 38.858368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.859021] [ 38.859243] Second to last potentially related work creation: [ 38.859928] kasan_save_stack+0x22/0x50 [ 38.860427] __kasan_record_aux_stack+0x8e/0xa0 [ 38.861002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.861661] remove_vma+0x139/0x170 [ 38.862114] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.862676] do_vmi_munmap+0x1f1/0x2b0 [ 38.863165] mmap_region+0x1f9/0x2660 [ 38.863644] do_mmap+0x854/0xf00 [ 38.864074] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.864565] ksys_mmap_pgoff+0x3af/0x500 [ 38.865075] do_syscall_64+0x3f/0x90 [ 38.865573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.866208] [ 38.866426] The buggy address belongs to the object at ffff88800e0d1cb0 [ 38.866426] which belongs to the cache vm_area_struct of size 168 [ 38.868024] The buggy address is located 88 bytes inside of [ 38.868024] freed 168-byte region [ffff88800e0d1cb0, ffff88800e0d1d58) [ 38.869775] [ 38.870064] The buggy address belongs to the physical page: [ 38.870957] page:00000000ae78b734 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0d1 [ 38.872245] memcg:ffff88800ca31b01 [ 38.872818] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.873710] page_type: 0xffffffff() [ 38.874223] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.875467] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca31b01 [ 38.876513] page dumped because: kasan: bad access detected [ 38.877436] [ 38.877727] Memory state around the buggy address: [ 38.878319] ffff88800e0d1c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.879371] ffff88800e0d1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.880455] >ffff88800e0d1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.881469] ^ [ 38.882065] ffff88800e0d1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.883062] ffff88800e0d1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.883920] ================================================================== [ 38.884919] Disabling lock debugging due to kernel taint [ 41.106009] BUG: Bad rss-counter state mm:00000000d0ba4ec4 type:MM_FILEPAGES val:33 [ 41.107174] BUG: Bad rss-counter state mm:00000000d0ba4ec4 type:MM_ANONPAGES val:22 [ 41.583995] BUG: Bad rss-counter state mm:0000000065b368da type:MM_FILEPAGES val:33 [ 41.585203] BUG: Bad rss-counter state mm:0000000065b368da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21135' (ECDSA) to the list of known hosts. 2023/06/21 10:50:03 fuzzer started 2023/06/21 10:50:03 dialing manager at localhost:36067 2023/06/21 10:50:03 checking machine... 2023/06/21 10:50:03 checking revisions... [ 42.299860] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:50:03 testing simple program... [ 42.347367] cgroup: Unknown subsys name 'net' [ 42.403736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:50:02 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=00000009a2addaba RCX=0000000000000000 RDX=ffff88800f593680 RSI=ffffffff813fc442 RDI=00000009a2addaba RBP=00000009a2addaba RSP=ffff88806ce09da8 R8 =0000000000000006 R9 =00000009a2addaba R10=00000009a2adba00 R11=ffff88806ce09ff8 R12=00000009a2adba00 R13=00000009a2adba00 R14=ffff8880147ef6a8 R15=dffffc0000000000 RIP=ffffffff814c086b RFL=00000046 [---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 00007fe2e929c900 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=00007ffeaa0c6000 CR3=000000000ec34000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fbe26a3bca0 CR3=000000000ca20000 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=ee84edb428647ca4e24182260ea84a67 XMM02=ec2efd57dc4c00df000000000011adf8 XMM03=643af395e96e2709000000000011aec8 XMM04=67eb308fe286fc4600000000000ae988 XMM05=19e9129bd510f2350000000000133438 XMM06=fb939067591f85020000000000131ce8 XMM07=e042d86d42eb936e0000000000121e58 XMM08=643af395e96e2709000000000011aec8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000