syzkaller login: [ 31.576113] BUG: Bad rss-counter state mm:000000009477651b type:MM_FILEPAGES val:33 [ 31.577740] BUG: Bad rss-counter state mm:000000009477651b type:MM_ANONPAGES val:22 [ 31.720097] ================================================================== [ 31.721228] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.722463] Read of size 8 at addr ffff88800e383228 by task sshd/221 [ 31.723381] [ 31.723643] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.724735] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.725826] Call Trace: [ 31.726161] [ 31.726449] dump_stack_lvl+0x91/0xf0 [ 31.726952] print_report+0xcc/0x620 [ 31.727453] ? __virt_addr_valid+0x102/0x340 [ 31.728030] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.728690] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.729335] kasan_report+0xbe/0xf0 [ 31.729816] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.730451] vma_interval_tree_remove+0xc75/0xec0 [ 31.731052] vma_prepare+0xc54/0x11a0 [ 31.731545] __split_vma+0x5af/0x950 [ 31.732022] ? __pfx___split_vma+0x10/0x10 [ 31.732603] ? find_held_lock+0x2c/0x110 [ 31.733133] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.733707] ? lock_is_held_type+0x9f/0x120 [ 31.734268] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.735063] ? mtree_range_walk+0x632/0x900 [ 31.735826] ? mas_walk+0x5c7/0x7c0 [ 31.736494] do_vmi_munmap+0x1f1/0x2b0 [ 31.737156] mmap_region+0x1f9/0x2660 [ 31.737813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.738512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.739397] ? __pfx_lock_acquire+0x10/0x10 [ 31.739992] ? __pfx_mmap_region+0x10/0x10 [ 31.740552] ? security_mmap_addr+0x7d/0xa0 [ 31.741108] ? get_unmapped_area+0x1f5/0x3f0 [ 31.741671] do_mmap+0x854/0xf00 [ 31.742115] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.742639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.743230] ksys_mmap_pgoff+0x3af/0x500 [ 31.743737] do_syscall_64+0x3f/0x90 [ 31.744253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.744910] RIP: 0033:0x7fb76e3dad82 [ 31.745384] 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 [ 31.747572] RSP: 002b:00007ffd17394478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.748509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb76e3dad82 [ 31.749377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb76d814000 [ 31.750242] RBP: 00007fb76d814000 R08: 0000000000000009 R09: 0000000000001000 [ 31.751106] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb8c575ec0 [ 31.751978] R13: 00007ffd17394490 R14: 00007ffd173944c0 R15: 00007ffd17394820 [ 31.752869] [ 31.753182] [ 31.753407] Allocated by task 214: [ 31.753843] kasan_save_stack+0x22/0x50 [ 31.754373] kasan_set_track+0x25/0x30 [ 31.754874] __kasan_slab_alloc+0x59/0x70 [ 31.755428] kmem_cache_alloc+0x16b/0x370 [ 31.755946] vm_area_dup+0x20/0x160 [ 31.756442] __split_vma+0x170/0x950 [ 31.756911] split_vma+0xc6/0x110 [ 31.757381] mprotect_fixup+0x8d2/0xb30 [ 31.757884] do_mprotect_pkey+0x87e/0xd40 [ 31.758430] __x64_sys_mprotect+0x78/0xc0 [ 31.758953] do_syscall_64+0x3f/0x90 [ 31.759464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760114] [ 31.760376] Freed by task 19: [ 31.760760] kasan_save_stack+0x22/0x50 [ 31.761325] kasan_set_track+0x25/0x30 [ 31.761936] kasan_save_free_info+0x2b/0x50 [ 31.762485] __kasan_slab_free+0x10a/0x190 [ 31.763030] kmem_cache_free+0x10d/0x4d0 [ 31.763565] rcu_core+0x8c8/0x2860 [ 31.764008] __do_softirq+0x1b7/0x7d4 [ 31.764524] [ 31.764747] Last potentially related work creation: [ 31.765356] kasan_save_stack+0x22/0x50 [ 31.765860] __kasan_record_aux_stack+0x8e/0xa0 [ 31.766454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.767105] remove_vma+0x139/0x170 [ 31.767662] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.768255] do_vmi_munmap+0x1f1/0x2b0 [ 31.768744] __vm_munmap+0x138/0x3a0 [ 31.769227] __x64_sys_munmap+0x59/0x80 [ 31.769727] do_syscall_64+0x3f/0x90 [ 31.770231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.770891] [ 31.771117] Second to last potentially related work creation: [ 31.771809] kasan_save_stack+0x22/0x50 [ 31.772341] __kasan_record_aux_stack+0x8e/0xa0 [ 31.772920] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.773586] remove_vma+0x139/0x170 [ 31.774044] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.774619] do_vmi_munmap+0x1f1/0x2b0 [ 31.775106] __vm_munmap+0x138/0x3a0 [ 31.775597] __x64_sys_munmap+0x59/0x80 [ 31.776096] do_syscall_64+0x3f/0x90 [ 31.776607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.777264] [ 31.777479] The buggy address belongs to the object at ffff88800e3831d0 [ 31.777479] which belongs to the cache vm_area_struct of size 168 [ 31.778946] The buggy address is located 88 bytes inside of [ 31.778946] freed 168-byte region [ffff88800e3831d0, ffff88800e383278) [ 31.780442] [ 31.780662] The buggy address belongs to the physical page: [ 31.781335] page:0000000021e6cad1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe383 [ 31.782435] memcg:ffff88800dbb9b01 [ 31.782861] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.783527] page_type: 0xffffffff() [ 31.783975] raw: 0100000000000200 ffff8880087a0c80 ffffea00003adfc0 dead000000000008 [ 31.784947] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbb9b01 [ 31.785869] page dumped because: kasan: bad access detected [ 31.786564] [ 31.786780] Memory state around the buggy address: [ 31.787367] ffff88800e383100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.788258] ffff88800e383180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.789123] >ffff88800e383200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.789986] ^ [ 31.790567] ffff88800e383280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.791440] ffff88800e383300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.792323] ================================================================== [ 31.793282] Disabling lock debugging due to kernel taint [ 34.348460] BUG: Bad rss-counter state mm:00000000fe2e6002 type:MM_FILEPAGES val:33 [ 34.349533] BUG: Bad rss-counter state mm:00000000fe2e6002 type:MM_ANONPAGES val:22 [ 34.766404] BUG: Bad rss-counter state mm:00000000ddbe449b type:MM_FILEPAGES val:33 [ 34.767513] BUG: Bad rss-counter state mm:00000000ddbe449b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18582' (ECDSA) to the list of known hosts. 2023/06/20 23:59:30 fuzzer started 2023/06/20 23:59:30 dialing manager at localhost:36067 2023/06/20 23:59:30 checking machine... 2023/06/20 23:59:30 checking revisions... [ 35.480959] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:59:30 testing simple program... [ 35.526988] cgroup: Unknown subsys name 'net' [ 35.572556] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:59:30 Registers: info registers vcpu 0 RAX=ffff88800c9fd7a0 RBX=ffff888008d9fdc8 RCX=1ffff1100193faf4 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff888008d9fdd8 RBP=0000000000000004 RSP=ffff888008d9fd30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008d9fdc8 R14=ffff88806ce35000 R15=ffff88800e284ec0 RIP=ffffffff8137fcd4 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 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=00007ff7213a0028 CR3=000000000caa8000 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=000000000010a9782fccd54c36d8a3f3 XMM01=de392412cecb2fa9084d6686917583ee XMM02=000000000011d4f0eff9b2d0a8fce9cb XMM03=000000000011d5c02c67c8bc2e329bc3 XMM04=660b54458623a8dd00000000000ae988 XMM05=59d5b690e0af863b0000000000132ba0 XMM06=133a8a5310966e950000000000131a08 XMM07=e042d86d42eb936e0000000000121f48 XMM08=64f8fa8ecef2d3be000000000011d5c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800dce7a68 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff846000aa RDI=ffff88800dce7a74 RBP=000000000000000b RSP=ffff88800dce7980 R8 =0000000000000001 R9 =ffff88800dce79e0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800dce7a68 R13=0000000000000000 R14=ffff888016e49b40 R15=ffff88800c84eab0 RIP=ffffffff813ad506 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 00007f4955e34900 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=00007ffc334f7000 CR3=000000000e644000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000