syzkaller login: [ 30.908237] BUG: Bad rss-counter state mm:00000000583e925a type:MM_FILEPAGES val:33 [ 30.909934] BUG: Bad rss-counter state mm:00000000583e925a type:MM_ANONPAGES val:22 [ 31.072710] ================================================================== [ 31.073620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.074571] Read of size 8 at addr ffff88800e3b36b0 by task sshd/219 [ 31.075344] [ 31.075563] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.076609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.077583] Call Trace: [ 31.077904] [ 31.078192] dump_stack_lvl+0x91/0xf0 [ 31.078713] print_report+0xcc/0x620 [ 31.079204] ? __virt_addr_valid+0x102/0x340 [ 31.079751] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.080391] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081008] kasan_report+0xbe/0xf0 [ 31.081482] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.082109] vma_interval_tree_remove+0xc75/0xec0 [ 31.082713] vma_prepare+0xc54/0x11a0 [ 31.083198] __split_vma+0x5af/0x950 [ 31.083670] ? __pfx___split_vma+0x10/0x10 [ 31.084204] ? find_held_lock+0x2c/0x110 [ 31.084730] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.085297] ? lock_is_held_type+0x9f/0x120 [ 31.085844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.086452] ? mtree_range_walk+0x632/0x900 [ 31.087008] ? mas_walk+0x5c7/0x7c0 [ 31.087484] do_vmi_munmap+0x1f1/0x2b0 [ 31.087983] mmap_region+0x1f9/0x2660 [ 31.088469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.088981] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.089693] ? __pfx_lock_acquire+0x10/0x10 [ 31.090226] ? __pfx_mmap_region+0x10/0x10 [ 31.090759] ? security_mmap_addr+0x7d/0xa0 [ 31.091288] ? get_unmapped_area+0x1f5/0x3f0 [ 31.091850] do_mmap+0x854/0xf00 [ 31.092294] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.092787] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.093352] ksys_mmap_pgoff+0x3af/0x500 [ 31.093859] do_syscall_64+0x3f/0x90 [ 31.094342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.094990] RIP: 0033:0x7f00a92bcd82 [ 31.095450] 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 [ 31.097599] RSP: 002b:00007ffe0cb5fa38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.098511] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f00a92bcd82 [ 31.099364] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f00a86f6000 [ 31.100234] RBP: 00007f00a86f6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.101087] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597c0eaaf60 [ 31.101939] R13: 00007ffe0cb5fa50 R14: 00007ffe0cb5fa80 R15: 00007ffe0cb5fde0 [ 31.102794] [ 31.103086] [ 31.103300] Allocated by task 212: [ 31.103729] kasan_save_stack+0x22/0x50 [ 31.104254] kasan_set_track+0x25/0x30 [ 31.104750] __kasan_slab_alloc+0x59/0x70 [ 31.105277] kmem_cache_alloc+0x16b/0x370 [ 31.105798] vm_area_dup+0x20/0x160 [ 31.106257] __split_vma+0x170/0x950 [ 31.106732] split_vma+0xc6/0x110 [ 31.107169] mprotect_fixup+0x8d2/0xb30 [ 31.107679] do_mprotect_pkey+0x87e/0xd40 [ 31.108216] __x64_sys_mprotect+0x78/0xc0 [ 31.108739] do_syscall_64+0x3f/0x90 [ 31.109219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.109861] [ 31.110076] Freed by task 212: [ 31.110464] kasan_save_stack+0x22/0x50 [ 31.110966] kasan_set_track+0x25/0x30 [ 31.111461] kasan_save_free_info+0x2b/0x50 [ 31.111999] __kasan_slab_free+0x10a/0x190 [ 31.112531] kmem_cache_free+0x10d/0x4d0 [ 31.113037] rcu_core+0x8c8/0x2860 [ 31.113484] __do_softirq+0x1b7/0x7d4 [ 31.113964] [ 31.114182] Last potentially related work creation: [ 31.114771] kasan_save_stack+0x22/0x50 [ 31.115281] __kasan_record_aux_stack+0x8e/0xa0 [ 31.115878] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.116523] remove_vma+0x139/0x170 [ 31.116979] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.117591] do_vmi_munmap+0x1f1/0x2b0 [ 31.118083] __vm_munmap+0x138/0x3a0 [ 31.118555] __x64_sys_munmap+0x59/0x80 [ 31.119053] do_syscall_64+0x3f/0x90 [ 31.119529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.120188] [ 31.120406] The buggy address belongs to the object at ffff88800e3b3658 [ 31.120406] which belongs to the cache vm_area_struct of size 168 [ 31.121878] The buggy address is located 88 bytes inside of [ 31.121878] freed 168-byte region [ffff88800e3b3658, ffff88800e3b3700) [ 31.123282] [ 31.123499] The buggy address belongs to the physical page: [ 31.124173] page:000000007ae75c74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3b3 [ 31.125262] memcg:ffff88800e529001 [ 31.125692] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.126406] page_type: 0xffffffff() [ 31.126865] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380500 dead000000000005 [ 31.127787] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e529001 [ 31.128719] page dumped because: kasan: bad access detected [ 31.129388] [ 31.129605] Memory state around the buggy address: [ 31.130190] ffff88800e3b3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.131051] ffff88800e3b3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.131921] >ffff88800e3b3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.132781] ^ [ 31.133367] ffff88800e3b3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.134219] ffff88800e3b3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.135074] ================================================================== [ 31.136110] Disabling lock debugging due to kernel taint [ 33.183439] BUG: Bad rss-counter state mm:00000000cc013287 type:MM_FILEPAGES val:33 [ 33.184618] BUG: Bad rss-counter state mm:00000000cc013287 type:MM_ANONPAGES val:22 [ 33.583215] BUG: Bad rss-counter state mm:00000000ca7b5ae5 type:MM_FILEPAGES val:33 [ 33.584246] BUG: Bad rss-counter state mm:00000000ca7b5ae5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63980' (ECDSA) to the list of known hosts. 2023/06/21 06:27:40 fuzzer started 2023/06/21 06:27:40 dialing manager at localhost:36067 2023/06/21 06:27:40 checking machine... 2023/06/21 06:27:40 checking revisions... [ 34.320938] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:27:40 testing simple program... [ 34.369127] cgroup: Unknown subsys name 'net' [ 34.415943] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:27:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11001cacee6 RCX=1ffffffff0ba7c92 RDX=1ffff110028a7749 RSI=0000000000000008 RDI=ffff88801453ba48 RBP=ffff88801453b680 RSP=ffff88800e5676f0 R8 =ffff88801453b698 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000006 R13=ffff88801453bf90 R14=ffff88801453b694 R15=0000000000000001 RIP=ffffffff8124cf3d 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 00007f1472451900 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=00007f1472a06650 CR3=000000000e094000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f43bf26d000 CR3=000000000f140000 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=6cb288c6d7facf99d348b49f0d8d46fd XMM02=000000000011ae40eff9b2d0a8fce9cb XMM03=000000000011af102c67c8bc2e329bc3 XMM04=ca604a691dee813200000000000ae988 XMM05=dfcdbad4f1609c3700000000001316d0 XMM06=d651c45e8e3f87d600000000001308a8 XMM07=e042d86d42eb936e0000000000121bd0 XMM08=6ad391569c623b66000000000011af10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000