syzkaller login: [ 38.788794] BUG: Bad rss-counter state mm:0000000083779b6a type:MM_FILEPAGES val:33 [ 38.790080] BUG: Bad rss-counter state mm:0000000083779b6a type:MM_ANONPAGES val:22 [ 38.947711] ================================================================== [ 38.948661] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.949610] Read of size 8 at addr ffff88800ef4fed8 by task sshd/218 [ 38.950403] [ 38.950624] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.951589] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.952600] Call Trace: [ 38.952922] [ 38.953220] dump_stack_lvl+0x91/0xf0 [ 38.953715] print_report+0xcc/0x620 [ 38.954206] ? __virt_addr_valid+0x102/0x340 [ 38.954761] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.955399] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.956038] kasan_report+0xbe/0xf0 [ 38.956532] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.957179] vma_interval_tree_remove+0xc75/0xec0 [ 38.957795] vma_prepare+0xc54/0x11a0 [ 38.958283] __split_vma+0x5af/0x950 [ 38.958761] ? __pfx___split_vma+0x10/0x10 [ 38.959294] ? find_held_lock+0x2c/0x110 [ 38.959832] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.960412] ? lock_is_held_type+0x9f/0x120 [ 38.960952] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.961567] ? mtree_range_walk+0x632/0x900 [ 38.962120] ? mas_walk+0x5c7/0x7c0 [ 38.962597] do_vmi_munmap+0x1f1/0x2b0 [ 38.963085] mmap_region+0x1f9/0x2660 [ 38.963570] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.964106] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.964822] ? __pfx_lock_acquire+0x10/0x10 [ 38.965357] ? __pfx_mmap_region+0x10/0x10 [ 38.965878] ? security_mmap_addr+0x7d/0xa0 [ 38.966415] ? get_unmapped_area+0x1f5/0x3f0 [ 38.966968] do_mmap+0x854/0xf00 [ 38.967412] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.967928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.968489] ksys_mmap_pgoff+0x3af/0x500 [ 38.969017] do_syscall_64+0x3f/0x90 [ 38.969490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.970136] RIP: 0033:0x7f5e8538cd82 [ 38.970599] 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 [ 38.972860] RSP: 002b:00007ffd457b5a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.973809] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e8538cd82 [ 38.974715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e847c6000 [ 38.975595] RBP: 00007f5e847c6000 R08: 0000000000000009 R09: 0000000000001000 [ 38.976500] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fab5463f70 [ 38.977386] R13: 00007ffd457b5a30 R14: 00007ffd457b5a60 R15: 00007ffd457b5dc0 [ 38.978287] [ 38.978590] [ 38.978812] Allocated by task 211: [ 38.979258] kasan_save_stack+0x22/0x50 [ 38.979781] kasan_set_track+0x25/0x30 [ 38.980312] __kasan_slab_alloc+0x59/0x70 [ 38.980868] kmem_cache_alloc+0x16b/0x370 [ 38.981409] vm_area_dup+0x20/0x160 [ 38.981877] __split_vma+0x170/0x950 [ 38.982361] split_vma+0xc6/0x110 [ 38.982819] mprotect_fixup+0x8d2/0xb30 [ 38.983346] do_mprotect_pkey+0x87e/0xd40 [ 38.983907] __x64_sys_mprotect+0x78/0xc0 [ 38.984453] do_syscall_64+0x3f/0x90 [ 38.984953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.985621] [ 38.985849] Freed by task 211: [ 38.986256] kasan_save_stack+0x22/0x50 [ 38.986784] kasan_set_track+0x25/0x30 [ 38.987298] kasan_save_free_info+0x2b/0x50 [ 38.987862] __kasan_slab_free+0x10a/0x190 [ 38.988415] kmem_cache_free+0x10d/0x4d0 [ 38.988951] rcu_core+0x8c8/0x2860 [ 38.989424] __do_softirq+0x1b7/0x7d4 [ 38.989920] [ 38.990144] Last potentially related work creation: [ 38.990755] kasan_save_stack+0x22/0x50 [ 38.991287] __kasan_record_aux_stack+0x8e/0xa0 [ 38.991904] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.992570] remove_vma+0x139/0x170 [ 38.993041] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.993627] do_vmi_munmap+0x1f1/0x2b0 [ 38.994129] __vm_munmap+0x138/0x3a0 [ 38.994612] __x64_sys_munmap+0x59/0x80 [ 38.995135] do_syscall_64+0x3f/0x90 [ 38.995646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.996320] [ 38.996541] The buggy address belongs to the object at ffff88800ef4fe80 [ 38.996541] which belongs to the cache vm_area_struct of size 168 [ 38.998007] The buggy address is located 88 bytes inside of [ 38.998007] freed 168-byte region [ffff88800ef4fe80, ffff88800ef4ff28) [ 38.999402] [ 38.999625] The buggy address belongs to the physical page: [ 39.000301] page:00000000d2c9bf84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef4f [ 39.001384] memcg:ffff88800e260101 [ 39.001856] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.002709] page_type: 0xffffffff() [ 39.003306] raw: 0100000000000200 ffff8880087a0c80 ffffea000025a380 dead000000000006 [ 39.004540] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e260101 [ 39.005629] page dumped because: kasan: bad access detected [ 39.006307] [ 39.006544] Memory state around the buggy address: [ 39.007147] ffff88800ef4fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.008062] ffff88800ef4fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.009040] >ffff88800ef4fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.009914] ^ [ 39.010656] ffff88800ef4ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.011524] ffff88800ef4ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.012411] ================================================================== [ 39.013415] Disabling lock debugging due to kernel taint [ 41.054120] BUG: Bad rss-counter state mm:00000000e99322b3 type:MM_FILEPAGES val:33 [ 41.055110] BUG: Bad rss-counter state mm:00000000e99322b3 type:MM_ANONPAGES val:22 [ 41.509979] BUG: Bad rss-counter state mm:000000009c4070b6 type:MM_FILEPAGES val:33 [ 41.511160] BUG: Bad rss-counter state mm:000000009c4070b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19950' (ECDSA) to the list of known hosts. 2023/06/20 17:54:21 fuzzer started 2023/06/20 17:54:22 dialing manager at localhost:36067 2023/06/20 17:54:22 checking machine... 2023/06/20 17:54:22 checking revisions... [ 42.175802] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:54:22 testing simple program... [ 42.224648] cgroup: Unknown subsys name 'net' [ 42.267769] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:54:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001ad8e6d RSP=ffff88800d6c7358 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff88801a1a85f0 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 00007f0788101900 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=00007f07886b8618 CR3=000000000f23e000 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=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 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=0000000000000001 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=00007fc8afd59a90 CR3=000000000dd3a000 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=c18009b07c914cb70c46f38a138e0a8f XMM02=2c67c8bc2e329bc3000000000011b0c8 XMM03=fb795ef6d65770560000000000121a68 XMM04=9051596f251c134f00000000000ae988 XMM05=751b9502027dc0b90000000000131618 XMM06=15d5341b6b7a5fc100000000001307f0 XMM07=e042d86d42eb936e0000000000121d40 XMM08=316a4b399d507f4a000000000011b128 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000