syzkaller login: [ 30.126836] BUG: Bad rss-counter state mm:0000000015ae7851 type:MM_FILEPAGES val:33 [ 30.128054] BUG: Bad rss-counter state mm:0000000015ae7851 type:MM_ANONPAGES val:22 [ 30.293330] ================================================================== [ 30.294266] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.295206] Read of size 8 at addr ffff88800d7d8798 by task sshd/220 [ 30.296162] [ 30.296380] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.297280] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.298285] Call Trace: [ 30.298600] [ 30.298888] dump_stack_lvl+0x91/0xf0 [ 30.299381] print_report+0xcc/0x620 [ 30.299867] ? __virt_addr_valid+0x102/0x340 [ 30.300415] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.301052] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.301667] kasan_report+0xbe/0xf0 [ 30.302151] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.302773] vma_interval_tree_remove+0xc75/0xec0 [ 30.303371] vma_prepare+0xc54/0x11a0 [ 30.303856] __split_vma+0x5af/0x950 [ 30.304330] ? __pfx___split_vma+0x10/0x10 [ 30.304870] ? find_held_lock+0x2c/0x110 [ 30.305399] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.305969] ? lock_is_held_type+0x9f/0x120 [ 30.306509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.307145] ? mtree_range_walk+0x632/0x900 [ 30.307703] ? mas_walk+0x5c7/0x7c0 [ 30.308183] do_vmi_munmap+0x1f1/0x2b0 [ 30.308700] mmap_region+0x1f9/0x2660 [ 30.309189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.309709] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.310429] ? __pfx_lock_acquire+0x10/0x10 [ 30.310965] ? __pfx_mmap_region+0x10/0x10 [ 30.311496] ? security_mmap_addr+0x7d/0xa0 [ 30.312027] ? get_unmapped_area+0x1f5/0x3f0 [ 30.312583] do_mmap+0x854/0xf00 [ 30.313042] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.313532] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.314095] ksys_mmap_pgoff+0x3af/0x500 [ 30.314599] do_syscall_64+0x3f/0x90 [ 30.315080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.315731] RIP: 0033:0x7fb7601add82 [ 30.316186] 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 [ 30.318314] RSP: 002b:00007ffd41c97968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.319220] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7601add82 [ 30.320059] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb75f5e7000 [ 30.320919] RBP: 00007fb75f5e7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.321767] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616482a8d90 [ 30.322606] R13: 00007ffd41c97980 R14: 00007ffd41c979b0 R15: 00007ffd41c97d10 [ 30.323464] [ 30.323756] [ 30.323972] Allocated by task 213: [ 30.324403] kasan_save_stack+0x22/0x50 [ 30.324918] kasan_set_track+0x25/0x30 [ 30.325408] __kasan_slab_alloc+0x59/0x70 [ 30.325932] kmem_cache_alloc+0x16b/0x370 [ 30.326449] vm_area_dup+0x20/0x160 [ 30.326904] __split_vma+0x170/0x950 [ 30.327381] split_vma+0xc6/0x110 [ 30.327815] mprotect_fixup+0x8d2/0xb30 [ 30.328315] do_mprotect_pkey+0x87e/0xd40 [ 30.328852] __x64_sys_mprotect+0x78/0xc0 [ 30.329371] do_syscall_64+0x3f/0x90 [ 30.329848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.330499] [ 30.330716] Freed by task 203: [ 30.331110] kasan_save_stack+0x22/0x50 [ 30.331618] kasan_set_track+0x25/0x30 [ 30.332114] kasan_save_free_info+0x2b/0x50 [ 30.332644] __kasan_slab_free+0x10a/0x190 [ 30.333194] kmem_cache_free+0x10d/0x4d0 [ 30.333704] rcu_core+0x8c8/0x2860 [ 30.334148] __do_softirq+0x1b7/0x7d4 [ 30.334625] [ 30.334844] Last potentially related work creation: [ 30.335431] kasan_save_stack+0x22/0x50 [ 30.335936] __kasan_record_aux_stack+0x8e/0xa0 [ 30.336510] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.337214] remove_vma+0x139/0x170 [ 30.337674] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.338233] do_vmi_munmap+0x1f1/0x2b0 [ 30.338718] __vm_munmap+0x138/0x3a0 [ 30.339201] __x64_sys_munmap+0x59/0x80 [ 30.339717] do_syscall_64+0x3f/0x90 [ 30.340188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.340846] [ 30.341063] Second to last potentially related work creation: [ 30.341747] kasan_save_stack+0x22/0x50 [ 30.342247] __kasan_record_aux_stack+0x8e/0xa0 [ 30.342813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.343454] remove_vma+0x139/0x170 [ 30.343905] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.344461] do_vmi_munmap+0x1f1/0x2b0 [ 30.344955] __vm_munmap+0x138/0x3a0 [ 30.345418] __x64_sys_munmap+0x59/0x80 [ 30.345914] do_syscall_64+0x3f/0x90 [ 30.346391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.347030] [ 30.347244] The buggy address belongs to the object at ffff88800d7d8740 [ 30.347244] which belongs to the cache vm_area_struct of size 168 [ 30.348749] The buggy address is located 88 bytes inside of [ 30.348749] freed 168-byte region [ffff88800d7d8740, ffff88800d7d87e8) [ 30.350228] [ 30.350453] The buggy address belongs to the physical page: [ 30.351149] page:00000000951b14c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7d8 [ 30.352291] memcg:ffff88800df87901 [ 30.352756] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.353449] page_type: 0xffffffff() [ 30.353929] raw: 0100000000000200 ffff8880087a0c80 ffffea0000329300 dead000000000002 [ 30.354897] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df87901 [ 30.355852] page dumped because: kasan: bad access detected [ 30.356565] [ 30.356809] Memory state around the buggy address: [ 30.357431] ffff88800d7d8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.358341] ffff88800d7d8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.359237] >ffff88800d7d8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.360137] ^ [ 30.360652] ffff88800d7d8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.361567] ffff88800d7d8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.362473] ================================================================== [ 30.363662] Disabling lock debugging due to kernel taint [ 32.900352] BUG: Bad rss-counter state mm:00000000bc7e0e75 type:MM_FILEPAGES val:33 [ 32.901551] BUG: Bad rss-counter state mm:00000000bc7e0e75 type:MM_ANONPAGES val:22 [ 33.279908] BUG: Bad rss-counter state mm:00000000f8308a93 type:MM_FILEPAGES val:33 [ 33.281149] BUG: Bad rss-counter state mm:00000000f8308a93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12856' (ECDSA) to the list of known hosts. 2023/06/21 05:12:14 fuzzer started 2023/06/21 05:12:15 dialing manager at localhost:36067 2023/06/21 05:12:15 checking machine... 2023/06/21 05:12:15 checking revisions... [ 33.972524] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:12:15 testing simple program... [ 34.024225] cgroup: Unknown subsys name 'net' [ 34.076945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:12:14 Registers: info registers vcpu 0 RAX=1ffff11001e53e73 RBX=ffff88800f29f428 RCX=ffff88800f2a0000 RDX=0000000000000001 RSI=1ffff11001e53e74 RDI=ffff88800f29f340 RBP=dffffc0000000000 RSP=ffff88800f29f340 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800f29f390 R11=00000000000b6a61 R12=ffffed1001e53e74 R13=ffffed1001e53e73 R14=ffff88800f29f3d8 R15=ffff88800f29f390 RIP=ffffffff81132faa 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 00007fbd847b0900 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=00007fbd84d67618 CR3=000000000eaa6000 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=0000000000000001 RBX=ffff888009464500 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88806cf09dd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000287 R13=ffffea0000251900 R14=ffffffff8186b835 R15=ffff88800ec0c480 RIP=ffffffff84535d0d RFL=00000287 [--S--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 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=00007f3cc78f2940 CR3=00000000141b6000 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=a6a45e69bce9e298084d82383e2673a6 XMM02=000000000011a8a0eff9b2d0a8fce9cb XMM03=000000000011a9702c67c8bc2e329bc3 XMM04=666ada913ddb4d5200000000000ae988 XMM05=19e9129bd510f2350000000000132c80 XMM06=db891bdca66d8c2e0000000000131ae8 XMM07=e042d86d42eb936e0000000000121e00 XMM08=0e2a039316831ead000000000011a970 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000