syzkaller login: [ 30.719474] BUG: Bad rss-counter state mm:00000000d1ea9746 type:MM_FILEPAGES val:33 [ 30.720161] BUG: Bad rss-counter state mm:00000000d1ea9746 type:MM_ANONPAGES val:22 [ 30.750152] ================================================================== [ 30.750784] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.751405] Read of size 8 at addr ffff8880195bc880 by task sshd/220 [ 30.751919] [ 30.752079] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.752634] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.753254] Call Trace: [ 30.753465] <TASK> [ 30.753665] dump_stack_lvl+0x91/0xf0 [ 30.753994] print_report+0xcc/0x620 [ 30.754400] ? __virt_addr_valid+0x102/0x340 [ 30.754818] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755220] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755614] kasan_report+0xbe/0xf0 [ 30.755931] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.756369] vma_interval_tree_remove+0xc75/0xec0 [ 30.756788] vma_prepare+0xc54/0x11a0 [ 30.757110] __split_vma+0x5af/0x950 [ 30.757425] ? __pfx___split_vma+0x10/0x10 [ 30.757755] ? find_held_lock+0x2c/0x110 [ 30.758102] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.758485] ? lock_is_held_type+0x9f/0x120 [ 30.758854] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.759264] ? mtree_range_walk+0x632/0x900 [ 30.759639] ? mas_walk+0x5c7/0x7c0 [ 30.759968] do_vmi_munmap+0x1f1/0x2b0 [ 30.760316] mmap_region+0x1f9/0x2660 [ 30.760641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.760989] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.761440] ? __pfx_lock_acquire+0x10/0x10 [ 30.761793] ? __pfx_mmap_region+0x10/0x10 [ 30.762143] ? security_mmap_addr+0x7d/0xa0 [ 30.762499] ? get_unmapped_area+0x1f5/0x3f0 [ 30.762870] do_mmap+0x854/0xf00 [ 30.763164] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.763498] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.763872] ksys_mmap_pgoff+0x3af/0x500 [ 30.764214] do_syscall_64+0x3f/0x90 [ 30.764539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764979] RIP: 0033:0x7eff0f66cd82 [ 30.765294] 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 [ 30.766721] RSP: 002b:00007ffce2cb3968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.767305] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff0f66cd82 [ 30.767866] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff0eaa6000 [ 30.768450] RBP: 00007eff0eaa6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.769012] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601208b4ec0 [ 30.769580] R13: 00007ffce2cb3980 R14: 00007ffce2cb39b0 R15: 00007ffce2cb3d10 [ 30.770149] </TASK> [ 30.770346] [ 30.770497] Allocated by task 213: [ 30.770778] kasan_save_stack+0x22/0x50 [ 30.771119] kasan_set_track+0x25/0x30 [ 30.771432] __kasan_slab_alloc+0x59/0x70 [ 30.771764] kmem_cache_alloc+0x16b/0x370 [ 30.772117] vm_area_dup+0x20/0x160 [ 30.772416] __split_vma+0x170/0x950 [ 30.772721] split_vma+0xc6/0x110 [ 30.773001] mprotect_fixup+0x8d2/0xb30 [ 30.773336] do_mprotect_pkey+0x87e/0xd40 [ 30.773683] __x64_sys_mprotect+0x78/0xc0 [ 30.774033] do_syscall_64+0x3f/0x90 [ 30.774348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.774778] [ 30.774923] Freed by task 202: [ 30.775181] kasan_save_stack+0x22/0x50 [ 30.775516] kasan_set_track+0x25/0x30 [ 30.775850] kasan_save_free_info+0x2b/0x50 [ 30.776227] __kasan_slab_free+0x10a/0x190 [ 30.776583] kmem_cache_free+0x10d/0x4d0 [ 30.776924] rcu_core+0x8c8/0x2860 [ 30.777215] __do_softirq+0x1b7/0x7d4 [ 30.777535] [ 30.777683] Last potentially related work creation: [ 30.778069] kasan_save_stack+0x22/0x50 [ 30.778405] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.779197] remove_vma+0x139/0x170 [ 30.779503] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.779875] do_vmi_munmap+0x1f1/0x2b0 [ 30.780211] __vm_munmap+0x138/0x3a0 [ 30.780520] __x64_sys_munmap+0x59/0x80 [ 30.780850] do_syscall_64+0x3f/0x90 [ 30.781158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781582] [ 30.781728] The buggy address belongs to the object at ffff8880195bc828 [ 30.781728] which belongs to the cache vm_area_struct of size 168 [ 30.782713] The buggy address is located 88 bytes inside of [ 30.782713] freed 168-byte region [ffff8880195bc828, ffff8880195bc8d0) [ 30.783617] [ 30.783767] The buggy address belongs to the physical page: [ 30.784228] page:0000000041329aad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x195bc [ 30.784969] memcg:ffff88800bbbce01 [ 30.785257] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.785698] page_type: 0xffffffff() [ 30.786006] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.786618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bbbce01 [ 30.787191] page dumped because: kasan: bad access detected [ 30.787623] [ 30.787774] Memory state around the buggy address: [ 30.788168] ffff8880195bc780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.788749] ffff8880195bc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.789309] >ffff8880195bc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.789877] ^ [ 30.790152] ffff8880195bc900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.790723] ffff8880195bc980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.791284] ================================================================== [ 30.792338] Disabling lock debugging due to kernel taint [ 32.194673] BUG: Bad rss-counter state mm:000000007734ef13 type:MM_FILEPAGES val:33 [ 32.195830] BUG: Bad rss-counter state mm:000000007734ef13 type:MM_ANONPAGES val:22 [ 32.650068] BUG: Bad rss-counter state mm:000000004c40d541 type:MM_FILEPAGES val:33 [ 32.651365] BUG: Bad rss-counter state mm:000000004c40d541 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49042' (ECDSA) to the list of known hosts. 2023/06/21 08:23:48 fuzzer started 2023/06/21 08:23:48 dialing manager at localhost:36067 2023/06/21 08:23:48 checking machine... 2023/06/21 08:23:48 checking revisions... [ 33.229573] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:23:48 testing simple program... [ 33.273680] cgroup: Unknown subsys name 'net' [ 33.311738] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program [ 42.553400] kmemleak: 68 new suspected memory leaks (see /sys/kernel/debug/kmemleak) VM DIAGNOSIS: 08:23:47 Registers: info registers vcpu 0 RAX=1ffffffff0c271d6 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff888008d9f9e0 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff86138eb4 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020d9c R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fcd8 R15=ffff888008d9f978 RIP=ffffffff81131118 RFL=00000213 [----A-C] 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=00007ffd521f5f18 CR3=000000000cd66000 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=2037343a33323a3830203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a33323a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880164d77b0 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf0a001 RSI=ffff88806cf09ff8 RDI=ffff88806cf09ff8 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b2f42 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ff8 R15=ffff88806cf09a98 RIP=ffffffff81130dfc RFL=00000202 [-------] 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 00007f26a4b75900 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=00007f26a512c618 CR3=000000000ee2c000 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=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