syzkaller login: [ 30.500744] BUG: Bad rss-counter state mm:000000004ea1381e type:MM_FILEPAGES val:33 [ 30.502895] BUG: Bad rss-counter state mm:000000004ea1381e type:MM_ANONPAGES val:22 [ 30.678106] ================================================================== [ 30.679083] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.680001] Read of size 8 at addr ffff888018cdf140 by task sshd/220 [ 30.680865] [ 30.681082] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.681954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.682925] Call Trace: [ 30.683243] [ 30.683517] dump_stack_lvl+0x91/0xf0 [ 30.683995] print_report+0xcc/0x620 [ 30.684471] ? __virt_addr_valid+0x102/0x340 [ 30.685013] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.685634] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.686232] kasan_report+0xbe/0xf0 [ 30.686701] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.687311] vma_interval_tree_remove+0xc75/0xec0 [ 30.687904] vma_prepare+0xc54/0x11a0 [ 30.688376] __split_vma+0x5af/0x950 [ 30.688829] ? __pfx___split_vma+0x10/0x10 [ 30.689374] ? find_held_lock+0x2c/0x110 [ 30.689888] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.690450] ? lock_is_held_type+0x9f/0x120 [ 30.690981] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.691580] ? mtree_range_walk+0x632/0x900 [ 30.692129] ? mas_walk+0x5c7/0x7c0 [ 30.692592] do_vmi_munmap+0x1f1/0x2b0 [ 30.693075] mmap_region+0x1f9/0x2660 [ 30.693566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.694075] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.694773] ? __pfx_lock_acquire+0x10/0x10 [ 30.695297] ? __pfx_mmap_region+0x10/0x10 [ 30.695816] ? security_mmap_addr+0x7d/0xa0 [ 30.696341] ? get_unmapped_area+0x1f5/0x3f0 [ 30.696881] do_mmap+0x854/0xf00 [ 30.697313] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.697823] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.698384] ksys_mmap_pgoff+0x3af/0x500 [ 30.698880] do_syscall_64+0x3f/0x90 [ 30.699356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.699992] RIP: 0033:0x7f91a12bed82 [ 30.700443] 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 [ 30.702558] RSP: 002b:00007ffdb37c6618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.703441] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91a12bed82 [ 30.704279] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91a06f8000 [ 30.705103] RBP: 00007f91a06f8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.705960] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563395c89ec0 [ 30.706791] R13: 00007ffdb37c6630 R14: 00007ffdb37c6660 R15: 00007ffdb37c69c0 [ 30.707644] [ 30.707928] [ 30.708137] Allocated by task 213: [ 30.708561] kasan_save_stack+0x22/0x50 [ 30.709059] kasan_set_track+0x25/0x30 [ 30.709567] __kasan_slab_alloc+0x59/0x70 [ 30.710087] kmem_cache_alloc+0x16b/0x370 [ 30.710600] vm_area_dup+0x20/0x160 [ 30.711051] __split_vma+0x170/0x950 [ 30.711507] split_vma+0xc6/0x110 [ 30.711934] mprotect_fixup+0x8d2/0xb30 [ 30.712430] do_mprotect_pkey+0x87e/0xd40 [ 30.712950] __x64_sys_mprotect+0x78/0xc0 [ 30.713466] do_syscall_64+0x3f/0x90 [ 30.713930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.714571] [ 30.714781] Freed by task 213: [ 30.715164] kasan_save_stack+0x22/0x50 [ 30.715657] kasan_set_track+0x25/0x30 [ 30.716136] kasan_save_free_info+0x2b/0x50 [ 30.716670] __kasan_slab_free+0x10a/0x190 [ 30.717188] kmem_cache_free+0x10d/0x4d0 [ 30.717714] rcu_core+0x8c8/0x2860 [ 30.718158] __do_softirq+0x1b7/0x7d4 [ 30.718635] [ 30.718848] Last potentially related work creation: [ 30.719426] kasan_save_stack+0x22/0x50 [ 30.719921] __kasan_record_aux_stack+0x8e/0xa0 [ 30.720490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.721123] remove_vma+0x139/0x170 [ 30.721581] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.722139] do_vmi_munmap+0x1f1/0x2b0 [ 30.722620] __vm_munmap+0x138/0x3a0 [ 30.723071] __x64_sys_munmap+0x59/0x80 [ 30.723557] do_syscall_64+0x3f/0x90 [ 30.724020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.724651] [ 30.724869] The buggy address belongs to the object at ffff888018cdf0e8 [ 30.724869] which belongs to the cache vm_area_struct of size 168 [ 30.726330] The buggy address is located 88 bytes inside of [ 30.726330] freed 168-byte region [ffff888018cdf0e8, ffff888018cdf190) [ 30.727695] [ 30.727903] The buggy address belongs to the physical page: [ 30.728554] page:000000009b0ffb42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18cdf [ 30.729642] memcg:ffff88800dc46001 [ 30.730059] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.730693] page_type: 0xffffffff() [ 30.731133] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.732036] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc46001 [ 30.732923] page dumped because: kasan: bad access detected [ 30.733582] [ 30.733789] Memory state around the buggy address: [ 30.734356] ffff888018cdf000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.735189] ffff888018cdf080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.736033] >ffff888018cdf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.736865] ^ [ 30.737499] ffff888018cdf180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.738339] ffff888018cdf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.739185] ================================================================== [ 30.740228] Disabling lock debugging due to kernel taint [ 32.840865] BUG: Bad rss-counter state mm:0000000014042110 type:MM_FILEPAGES val:33 [ 32.842050] BUG: Bad rss-counter state mm:0000000014042110 type:MM_ANONPAGES val:22 [ 33.252344] BUG: Bad rss-counter state mm:0000000087eb532a type:MM_FILEPAGES val:33 [ 33.253287] BUG: Bad rss-counter state mm:0000000087eb532a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49959' (ECDSA) to the list of known hosts. 2023/06/21 01:43:19 fuzzer started 2023/06/21 01:43:19 dialing manager at localhost:36067 2023/06/21 01:43:19 checking machine... 2023/06/21 01:43:19 checking revisions... [ 33.977722] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:43:20 testing simple program... [ 34.029072] cgroup: Unknown subsys name 'net' [ 34.079121] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:43:19 Registers: info registers vcpu 0 RAX=ffffffff85d3e490 RBX=0000000000000000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88801454f730 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000010 R14=0000000000000001 R15=0000000000000246 RIP=ffffffff812d133c RFL=00000002 [-------] 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 00007f33feb68700 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=00007f556e99f0b0 CR3=0000000015e20000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039313a3334 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323039 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f715f36b010 CR3=000000000c54c000 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=456e0d57bc95529e7f4550390abe6cce XMM02=2c67c8bc2e329bc3000000000011a2b0 XMM03=fb795ef6d65770560000000000121888 XMM04=0340699a32187c0500000000000ae988 XMM05=19e9129bd510f2350000000000131990 XMM06=4fda316b135da52b0000000000131818 XMM07=e042d86d42eb936e0000000000121b08 XMM08=1c23f5d25c67a312000000000011a310 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000