syzkaller login: [ 30.486705] BUG: Bad rss-counter state mm:000000003ca5d606 type:MM_FILEPAGES val:33 [ 30.487752] BUG: Bad rss-counter state mm:000000003ca5d606 type:MM_ANONPAGES val:22 [ 30.659644] ================================================================== [ 30.660706] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.661799] Read of size 8 at addr ffff888015ddbdf0 by task sshd/220 [ 30.662886] [ 30.663146] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.664169] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.665319] Call Trace: [ 30.665692] [ 30.666023] dump_stack_lvl+0x91/0xf0 [ 30.666591] print_report+0xcc/0x620 [ 30.667151] ? __virt_addr_valid+0x102/0x340 [ 30.667803] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.668519] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.669231] kasan_report+0xbe/0xf0 [ 30.669796] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.670523] vma_interval_tree_remove+0xc75/0xec0 [ 30.671234] vma_prepare+0xc54/0x11a0 [ 30.671792] __split_vma+0x5af/0x950 [ 30.672349] ? __pfx___split_vma+0x10/0x10 [ 30.672951] ? find_held_lock+0x2c/0x110 [ 30.673545] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.674194] ? lock_is_held_type+0x9f/0x120 [ 30.674812] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.675508] ? mtree_range_walk+0x632/0x900 [ 30.676165] ? mas_walk+0x5c7/0x7c0 [ 30.676714] do_vmi_munmap+0x1f1/0x2b0 [ 30.677285] mmap_region+0x1f9/0x2660 [ 30.677840] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.678423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.679279] ? __pfx_lock_acquire+0x10/0x10 [ 30.679924] ? __pfx_mmap_region+0x10/0x10 [ 30.680562] ? security_mmap_addr+0x7d/0xa0 [ 30.681196] ? get_unmapped_area+0x1f5/0x3f0 [ 30.681854] do_mmap+0x854/0xf00 [ 30.682380] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.682970] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.683655] ksys_mmap_pgoff+0x3af/0x500 [ 30.684273] do_syscall_64+0x3f/0x90 [ 30.684832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.685585] RIP: 0033:0x7f49be021d82 [ 30.686113] 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 [ 30.688546] RSP: 002b:00007ffe37491568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.689558] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49be021d82 [ 30.690506] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49bd45b000 [ 30.691454] RBP: 00007f49bd45b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.692428] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdb00c3ec0 [ 30.693374] R13: 00007ffe37491580 R14: 00007ffe374915b0 R15: 00007ffe37491910 [ 30.694370] [ 30.694709] [ 30.694960] Allocated by task 213: [ 30.695458] kasan_save_stack+0x22/0x50 [ 30.696065] kasan_set_track+0x25/0x30 [ 30.696643] __kasan_slab_alloc+0x59/0x70 [ 30.697252] kmem_cache_alloc+0x16b/0x370 [ 30.697855] vm_area_dup+0x20/0x160 [ 30.698384] __split_vma+0x170/0x950 [ 30.698931] split_vma+0xc6/0x110 [ 30.699440] mprotect_fixup+0x8d2/0xb30 [ 30.700030] do_mprotect_pkey+0x87e/0xd40 [ 30.700637] __x64_sys_mprotect+0x78/0xc0 [ 30.701241] do_syscall_64+0x3f/0x90 [ 30.701800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.702550] [ 30.702802] Freed by task 203: [ 30.703257] kasan_save_stack+0x22/0x50 [ 30.703916] kasan_set_track+0x25/0x30 [ 30.704486] kasan_save_free_info+0x2b/0x50 [ 30.705107] __kasan_slab_free+0x10a/0x190 [ 30.705722] kmem_cache_free+0x10d/0x4d0 [ 30.706309] rcu_core+0x8c8/0x2860 [ 30.706826] __do_softirq+0x1b7/0x7d4 [ 30.707390] [ 30.707663] Last potentially related work creation: [ 30.708353] kasan_save_stack+0x22/0x50 [ 30.708936] __kasan_record_aux_stack+0x8e/0xa0 [ 30.709594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.710341] remove_vma+0x139/0x170 [ 30.710866] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.711514] do_vmi_munmap+0x1f1/0x2b0 [ 30.712088] __vm_munmap+0x138/0x3a0 [ 30.712632] __x64_sys_munmap+0x59/0x80 [ 30.713208] do_syscall_64+0x3f/0x90 [ 30.713764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.714511] [ 30.714760] The buggy address belongs to the object at ffff888015ddbd98 [ 30.714760] which belongs to the cache vm_area_struct of size 168 [ 30.716460] The buggy address is located 88 bytes inside of [ 30.716460] freed 168-byte region [ffff888015ddbd98, ffff888015ddbe40) [ 30.718072] [ 30.718321] The buggy address belongs to the physical page: [ 30.719081] page:0000000034a92c7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ddb [ 30.720351] memcg:ffff88800eb12301 [ 30.720845] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.721583] page_type: 0xffffffff() [ 30.722105] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.723157] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb12301 [ 30.724214] page dumped because: kasan: bad access detected [ 30.724973] [ 30.725223] Memory state around the buggy address: [ 30.725887] ffff888015ddbc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.726872] ffff888015ddbd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.727882] >ffff888015ddbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.728858] ^ [ 30.729778] ffff888015ddbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.730748] ffff888015ddbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.731709] ================================================================== [ 30.732791] Disabling lock debugging due to kernel taint [ 32.883661] BUG: Bad rss-counter state mm:000000001ba491b9 type:MM_FILEPAGES val:33 [ 32.884840] BUG: Bad rss-counter state mm:000000001ba491b9 type:MM_ANONPAGES val:22 [ 33.357292] BUG: Bad rss-counter state mm:0000000090c3b953 type:MM_FILEPAGES val:33 [ 33.358491] BUG: Bad rss-counter state mm:0000000090c3b953 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28426' (ECDSA) to the list of known hosts. 2023/06/20 12:05:44 fuzzer started 2023/06/20 12:05:44 dialing manager at localhost:36067 2023/06/20 12:05:44 checking machine... 2023/06/20 12:05:44 checking revisions... [ 34.000089] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:05:44 testing simple program... [ 34.046439] cgroup: Unknown subsys name 'net' [ 34.100882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:05:43 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11003244da8 RSI=ffffffff82246575 RDI=ffff888019226d40 RBP=ffff888019226c80 RSP=ffff888016c7f390 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000069200000692 R12=0000000000000010 R13=0000000000000006 R14=ffff888016c7f430 R15=0000000000000e30 RIP=ffffffff814c086b RFL=00000206 [-----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 00007f1dd0a18900 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=00007f1dd0fcf618 CR3=000000001806e000 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=2033343a35303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a35303a3231203032 XMM08=20612f6e3d6469756120726f66207d20 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=00007fb3a65e7000 CR3=000000000e50e000 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=8f4a54c700ca50a2c549a5479daf73c0 XMM02=000000000011a230eff9b2d0a8fce9cb XMM03=000000000011a3002c67c8bc2e329bc3 XMM04=6a757c268c0be65f00000000000ae988 XMM05=19e9129bd510f2350000000000131aa0 XMM06=c03324966070590d0000000000130908 XMM07=e042d86d42eb936e0000000000121ea0 XMM08=5ee9f7a6ff7261d6000000000011a300 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000