syzkaller login: [ 30.510565] BUG: Bad rss-counter state mm:0000000054b54967 type:MM_FILEPAGES val:33 [ 30.511615] BUG: Bad rss-counter state mm:0000000054b54967 type:MM_ANONPAGES val:22 [ 30.698626] ================================================================== [ 30.699559] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.700516] Read of size 8 at addr ffff888015a3e798 by task sshd/220 [ 30.701414] [ 30.701650] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.702530] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.703552] Call Trace: [ 30.703876] [ 30.704165] dump_stack_lvl+0x91/0xf0 [ 30.704662] print_report+0xcc/0x620 [ 30.705158] ? __virt_addr_valid+0x102/0x340 [ 30.705722] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706352] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706975] kasan_report+0xbe/0xf0 [ 30.707464] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.708107] vma_interval_tree_remove+0xc75/0xec0 [ 30.708714] vma_prepare+0xc54/0x11a0 [ 30.709198] __split_vma+0x5af/0x950 [ 30.709679] ? __pfx___split_vma+0x10/0x10 [ 30.710216] ? find_held_lock+0x2c/0x110 [ 30.710751] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.711332] ? lock_is_held_type+0x9f/0x120 [ 30.711895] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.712526] ? mtree_range_walk+0x632/0x900 [ 30.713087] ? mas_walk+0x5c7/0x7c0 [ 30.713572] do_vmi_munmap+0x1f1/0x2b0 [ 30.714078] mmap_region+0x1f9/0x2660 [ 30.714566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.715086] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.715836] ? __pfx_lock_acquire+0x10/0x10 [ 30.716386] ? __pfx_mmap_region+0x10/0x10 [ 30.716931] ? security_mmap_addr+0x7d/0xa0 [ 30.717476] ? get_unmapped_area+0x1f5/0x3f0 [ 30.718039] do_mmap+0x854/0xf00 [ 30.718493] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.718992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.719570] ksys_mmap_pgoff+0x3af/0x500 [ 30.720112] do_syscall_64+0x3f/0x90 [ 30.720617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.721288] RIP: 0033:0x7f4e9104dd82 [ 30.721758] 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 [ 30.723942] RSP: 002b:00007ffdf995de88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.724869] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e9104dd82 [ 30.725731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e90487000 [ 30.726598] RBP: 00007f4e90487000 R08: 0000000000000009 R09: 0000000000001000 [ 30.727473] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a19a9cfb20 [ 30.728338] R13: 00007ffdf995dea0 R14: 00007ffdf995ded0 R15: 00007ffdf995e230 [ 30.729205] [ 30.729503] [ 30.729726] Allocated by task 213: [ 30.730158] kasan_save_stack+0x22/0x50 [ 30.730667] kasan_set_track+0x25/0x30 [ 30.731170] __kasan_slab_alloc+0x59/0x70 [ 30.731706] kmem_cache_alloc+0x16b/0x370 [ 30.732229] vm_area_dup+0x20/0x160 [ 30.732692] __split_vma+0x170/0x950 [ 30.733187] split_vma+0xc6/0x110 [ 30.733627] mprotect_fixup+0x8d2/0xb30 [ 30.734134] do_mprotect_pkey+0x87e/0xd40 [ 30.734660] __x64_sys_mprotect+0x78/0xc0 [ 30.735188] do_syscall_64+0x3f/0x90 [ 30.735681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.736328] [ 30.736541] Freed by task 210: [ 30.736941] kasan_save_stack+0x22/0x50 [ 30.737445] kasan_set_track+0x25/0x30 [ 30.737950] kasan_save_free_info+0x2b/0x50 [ 30.738492] __kasan_slab_free+0x10a/0x190 [ 30.739036] kmem_cache_free+0x10d/0x4d0 [ 30.739551] rcu_core+0x8c8/0x2860 [ 30.740006] __do_softirq+0x1b7/0x7d4 [ 30.740492] [ 30.740711] Last potentially related work creation: [ 30.741305] kasan_save_stack+0x22/0x50 [ 30.741814] __kasan_record_aux_stack+0x8e/0xa0 [ 30.742397] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.743058] remove_vma+0x139/0x170 [ 30.743552] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.744125] do_vmi_munmap+0x1f1/0x2b0 [ 30.744624] __vm_munmap+0x138/0x3a0 [ 30.745096] __x64_sys_munmap+0x59/0x80 [ 30.745599] do_syscall_64+0x3f/0x90 [ 30.746082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.746744] [ 30.746966] The buggy address belongs to the object at ffff888015a3e740 [ 30.746966] which belongs to the cache vm_area_struct of size 168 [ 30.748472] The buggy address is located 88 bytes inside of [ 30.748472] freed 168-byte region [ffff888015a3e740, ffff888015a3e7e8) [ 30.749907] [ 30.750127] The buggy address belongs to the physical page: [ 30.750801] page:00000000327653b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a3e [ 30.751942] memcg:ffff888015a80901 [ 30.752386] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.753034] page_type: 0xffffffff() [ 30.753490] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.754426] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a80901 [ 30.755358] page dumped because: kasan: bad access detected [ 30.756038] [ 30.756252] Memory state around the buggy address: [ 30.756850] ffff888015a3e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.757722] ffff888015a3e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.758620] >ffff888015a3e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.759491] ^ [ 30.759992] ffff888015a3e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.760861] ffff888015a3e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.761732] ================================================================== [ 30.762705] Disabling lock debugging due to kernel taint [ 32.794982] BUG: Bad rss-counter state mm:00000000cbfc32d9 type:MM_FILEPAGES val:33 [ 32.796178] BUG: Bad rss-counter state mm:00000000cbfc32d9 type:MM_ANONPAGES val:22 [ 33.257044] BUG: Bad rss-counter state mm:00000000e8dd55ee type:MM_FILEPAGES val:33 [ 33.258228] BUG: Bad rss-counter state mm:00000000e8dd55ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18720' (ECDSA) to the list of known hosts. 2023/06/20 20:02:11 fuzzer started 2023/06/20 20:02:11 dialing manager at localhost:36067 2023/06/20 20:02:11 checking machine... 2023/06/20 20:02:11 checking revisions... [ 33.907879] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:02:11 testing simple program... [ 33.960856] cgroup: Unknown subsys name 'net' [ 34.001837] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:02:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016f87698 RCX=ffffffff863b3c01 RDX=1ffff11002df0ede RSI=0000000000000000 RDI=ffffffff8450cc7f RBP=ffff888016f876f0 RSP=ffff888016f87680 R8 =ffffffff863b3c2a R9 =ffff888016f876d8 R10=0000000000038001 R11=000000000008aa85 R12=ffff888016f87760 R13=0000000000000000 R14=ffff888015a18000 R15=0000000000092cc0 RIP=ffffffff811303b2 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 00007f508f5c0900 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=00007f508fb77618 CR3=000000000e3ca000 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=00007fcc0d810840 CR3=000000000ec66000 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=616e9e612de0128df543e50aa82090ea XMM02=2c67c8bc2e329bc3000000000011d388 XMM03=fb795ef6d65770560000000000121858 XMM04=556d5bdc98cff9ba00000000000ae988 XMM05=60b7134ace21d3090000000000132738 XMM06=4fda316b135da52b00000000001317d8 XMM07=e042d86d42eb936e0000000000121ad8 XMM08=ce0b6e832053a5e7000000000011d3e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000