syzkaller login: [ 30.458574] BUG: Bad rss-counter state mm:00000000bfc9b9a5 type:MM_FILEPAGES val:33 [ 30.459662] BUG: Bad rss-counter state mm:00000000bfc9b9a5 type:MM_ANONPAGES val:22 [ 30.563158] ================================================================== [ 30.563882] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.564606] Read of size 8 at addr ffff8880168b7798 by task sshd/220 [ 30.565210] [ 30.565378] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.566041] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.566884] Call Trace: [ 30.567126] [ 30.567347] dump_stack_lvl+0x91/0xf0 [ 30.567729] print_report+0xcc/0x620 [ 30.568098] ? __virt_addr_valid+0x102/0x340 [ 30.568531] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.569027] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.569501] kasan_report+0xbe/0xf0 [ 30.569847] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.570190] vma_interval_tree_remove+0xc75/0xec0 [ 30.570520] vma_prepare+0xc54/0x11a0 [ 30.570780] __split_vma+0x5af/0x950 [ 30.571042] ? __pfx___split_vma+0x10/0x10 [ 30.571334] ? find_held_lock+0x2c/0x110 [ 30.571621] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.571934] ? lock_is_held_type+0x9f/0x120 [ 30.572231] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.572568] ? mtree_range_walk+0x632/0x900 [ 30.572895] ? mas_walk+0x5c7/0x7c0 [ 30.573170] do_vmi_munmap+0x1f1/0x2b0 [ 30.573448] mmap_region+0x1f9/0x2660 [ 30.573722] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.574017] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.574424] ? __pfx_lock_acquire+0x10/0x10 [ 30.574726] ? __pfx_mmap_region+0x10/0x10 [ 30.575029] ? security_mmap_addr+0x7d/0xa0 [ 30.575334] ? get_unmapped_area+0x1f5/0x3f0 [ 30.575652] do_mmap+0x854/0xf00 [ 30.575905] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.576182] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.576502] ksys_mmap_pgoff+0x3af/0x500 [ 30.576794] do_syscall_64+0x3f/0x90 [ 30.577065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.577435] RIP: 0033:0x7f0fa631fd82 [ 30.577698] 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 [ 30.578898] RSP: 002b:00007ffe8a2260d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.579410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fa631fd82 [ 30.579893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fa5759000 [ 30.580367] RBP: 00007f0fa5759000 R08: 0000000000000009 R09: 0000000000001000 [ 30.580858] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561eeba2ad90 [ 30.581343] R13: 00007ffe8a2260f0 R14: 00007ffe8a226120 R15: 00007ffe8a226480 [ 30.581825] [ 30.581989] [ 30.582109] Allocated by task 213: [ 30.582354] kasan_save_stack+0x22/0x50 [ 30.582640] kasan_set_track+0x25/0x30 [ 30.582919] __kasan_slab_alloc+0x59/0x70 [ 30.583223] kmem_cache_alloc+0x16b/0x370 [ 30.583529] vm_area_dup+0x20/0x160 [ 30.583791] __split_vma+0x170/0x950 [ 30.584062] split_vma+0xc6/0x110 [ 30.584309] mprotect_fixup+0x8d2/0xb30 [ 30.584599] do_mprotect_pkey+0x87e/0xd40 [ 30.584903] __x64_sys_mprotect+0x78/0xc0 [ 30.585208] do_syscall_64+0x3f/0x90 [ 30.585482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.585857] [ 30.585985] Freed by task 203: [ 30.586210] kasan_save_stack+0x22/0x50 [ 30.586500] kasan_set_track+0x25/0x30 [ 30.586787] kasan_save_free_info+0x2b/0x50 [ 30.587093] __kasan_slab_free+0x10a/0x190 [ 30.587404] kmem_cache_free+0x10d/0x4d0 [ 30.587695] rcu_core+0x8c8/0x2860 [ 30.587957] __do_softirq+0x1b7/0x7d4 [ 30.588231] [ 30.588356] Last potentially related work creation: [ 30.588702] kasan_save_stack+0x22/0x50 [ 30.589001] __kasan_record_aux_stack+0x8e/0xa0 [ 30.589339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.589714] remove_vma+0x139/0x170 [ 30.589975] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.590298] do_vmi_munmap+0x1f1/0x2b0 [ 30.590585] __vm_munmap+0x138/0x3a0 [ 30.590859] __x64_sys_munmap+0x59/0x80 [ 30.591144] do_syscall_64+0x3f/0x90 [ 30.591417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.591796] [ 30.591925] The buggy address belongs to the object at ffff8880168b7740 [ 30.591925] which belongs to the cache vm_area_struct of size 168 [ 30.592796] The buggy address is located 88 bytes inside of [ 30.592796] freed 168-byte region [ffff8880168b7740, ffff8880168b77e8) [ 30.593611] [ 30.593735] The buggy address belongs to the physical page: [ 30.594122] page:0000000054fdbc4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168b7 [ 30.594764] memcg:ffff88800f6a2301 [ 30.595015] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.595396] page_type: 0xffffffff() [ 30.595658] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.596187] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6a2301 [ 30.596716] page dumped because: kasan: bad access detected [ 30.597104] [ 30.597227] Memory state around the buggy address: [ 30.597576] ffff8880168b7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.598081] ffff8880168b7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.598583] >ffff8880168b7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.599081] ^ [ 30.599362] ffff8880168b7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.599852] ffff8880168b7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.600344] ================================================================== [ 30.601049] Disabling lock debugging due to kernel taint [ 33.030685] BUG: Bad rss-counter state mm:000000000189981f type:MM_FILEPAGES val:33 [ 33.031899] BUG: Bad rss-counter state mm:000000000189981f type:MM_ANONPAGES val:22 [ 33.576866] BUG: Bad rss-counter state mm:0000000028ed802c type:MM_FILEPAGES val:33 [ 33.578137] BUG: Bad rss-counter state mm:0000000028ed802c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59287' (ECDSA) to the list of known hosts. 2023/06/21 01:24:57 fuzzer started 2023/06/21 01:24:57 dialing manager at localhost:36067 2023/06/21 01:24:57 checking machine... 2023/06/21 01:24:57 checking revisions... [ 34.260850] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:24:57 testing simple program... [ 34.303190] cgroup: Unknown subsys name 'net' [ 34.341523] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:24:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b202c RDX=ffff8880168d79f8 RSI=1ffff11002d1af41 RDI=1ffff11002d1af41 RBP=ffff8880168d7a08 RSP=ffff8880168d7940 R8 =ffffffff864b2030 R9 =ffff8880168d79f0 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880168d7a10 R13=ffff8880168d79f8 R14=ffff8880168d7f58 R15=ffff8880168d79b0 RIP=ffffffff811310a7 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 00007fa6d514f900 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=00007fa6d57070b0 CR3=0000000010192000 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=00007fd19caa8af0 CR3=000000000c9ac000 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=0b23aa00dfdec28f81490bddacb4f357 XMM02=ec2efd57dc4c00df0000000000119800 XMM03=00e6f91f78404b5500000000001198d0 XMM04=9821b7bed9ce870200000000000ae988 XMM05=9c157eec460a01ad0000000000131dc8 XMM06=4fda316b135da52b0000000000130e68 XMM07=e042d86d42eb936e0000000000121398 XMM08=00e6f91f78404b5500000000001198d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000