syzkaller login: [ 30.440973] BUG: Bad rss-counter state mm:00000000c23f56cf type:MM_FILEPAGES val:33 [ 30.442121] BUG: Bad rss-counter state mm:00000000c23f56cf type:MM_ANONPAGES val:22 [ 30.615994] ================================================================== [ 30.617181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.618142] Read of size 8 at addr ffff88800d643058 by task sshd/221 [ 30.618852] [ 30.619090] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.619901] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.620822] Call Trace: [ 30.621121] [ 30.621391] dump_stack_lvl+0x91/0xf0 [ 30.621853] print_report+0xcc/0x620 [ 30.622308] ? __virt_addr_valid+0x102/0x340 [ 30.622832] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.623410] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.623986] kasan_report+0xbe/0xf0 [ 30.624441] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.625036] vma_interval_tree_remove+0xc75/0xec0 [ 30.625606] vma_prepare+0xc54/0x11a0 [ 30.626088] __split_vma+0x5af/0x950 [ 30.626552] ? __pfx___split_vma+0x10/0x10 [ 30.627077] ? find_held_lock+0x2c/0x110 [ 30.627602] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.628162] ? lock_is_held_type+0x9f/0x120 [ 30.628727] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.629342] ? mtree_range_walk+0x632/0x900 [ 30.629891] ? mas_walk+0x5c7/0x7c0 [ 30.630355] do_vmi_munmap+0x1f1/0x2b0 [ 30.630850] mmap_region+0x1f9/0x2660 [ 30.631331] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.631838] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.632556] ? __pfx_lock_acquire+0x10/0x10 [ 30.633099] ? __pfx_mmap_region+0x10/0x10 [ 30.633623] ? security_mmap_addr+0x7d/0xa0 [ 30.634158] ? get_unmapped_area+0x1f5/0x3f0 [ 30.634705] do_mmap+0x854/0xf00 [ 30.635148] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.635648] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.636208] ksys_mmap_pgoff+0x3af/0x500 [ 30.636719] do_syscall_64+0x3f/0x90 [ 30.637197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.637835] RIP: 0033:0x7f9f0f269d82 [ 30.638289] 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 [ 30.640420] RSP: 002b:00007ffd47df67d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.641349] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f0f269d82 [ 30.642211] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f0e6a3000 [ 30.643072] RBP: 00007f9f0e6a3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.643914] R10: 0000000000000812 R11: 0000000000000206 R12: 000056415da9fec0 [ 30.644774] R13: 00007ffd47df67f0 R14: 00007ffd47df6820 R15: 00007ffd47df6b80 [ 30.645636] [ 30.645932] [ 30.646149] Allocated by task 213: [ 30.646583] kasan_save_stack+0x22/0x50 [ 30.647091] kasan_set_track+0x25/0x30 [ 30.647583] __kasan_slab_alloc+0x59/0x70 [ 30.648110] kmem_cache_alloc+0x16b/0x370 [ 30.648635] vm_area_dup+0x20/0x160 [ 30.649090] __split_vma+0x170/0x950 [ 30.649558] split_vma+0xc6/0x110 [ 30.649987] mprotect_fixup+0x8d2/0xb30 [ 30.650467] do_mprotect_pkey+0x87e/0xd40 [ 30.650955] __x64_sys_mprotect+0x78/0xc0 [ 30.651449] do_syscall_64+0x3f/0x90 [ 30.651899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.652509] [ 30.652731] Freed by task 213: [ 30.653105] kasan_save_stack+0x22/0x50 [ 30.653578] kasan_set_track+0x25/0x30 [ 30.654041] kasan_save_free_info+0x2b/0x50 [ 30.654540] __kasan_slab_free+0x10a/0x190 [ 30.655039] kmem_cache_free+0x10d/0x4d0 [ 30.655522] rcu_core+0x8c8/0x2860 [ 30.655941] __do_softirq+0x1b7/0x7d4 [ 30.656394] [ 30.656605] Last potentially related work creation: [ 30.657150] kasan_save_stack+0x22/0x50 [ 30.657627] __kasan_record_aux_stack+0x8e/0xa0 [ 30.658165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.658774] remove_vma+0x139/0x170 [ 30.659200] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.659727] do_vmi_munmap+0x1f1/0x2b0 [ 30.660216] __vm_munmap+0x138/0x3a0 [ 30.660706] __x64_sys_munmap+0x59/0x80 [ 30.661206] do_syscall_64+0x3f/0x90 [ 30.661680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.662317] [ 30.662534] The buggy address belongs to the object at ffff88800d643000 [ 30.662534] which belongs to the cache vm_area_struct of size 168 [ 30.664026] The buggy address is located 88 bytes inside of [ 30.664026] freed 168-byte region [ffff88800d643000, ffff88800d6430a8) [ 30.665466] [ 30.665686] The buggy address belongs to the physical page: [ 30.666358] page:000000007889c340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd643 [ 30.667448] memcg:ffff88801a140901 [ 30.667885] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.668538] page_type: 0xffffffff() [ 30.668993] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.669918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a140901 [ 30.670831] page dumped because: kasan: bad access detected [ 30.671506] [ 30.671722] Memory state around the buggy address: [ 30.672314] ffff88800d642f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.673214] ffff88800d642f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.674082] >ffff88800d643000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.674937] ^ [ 30.675669] ffff88800d643080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.676535] ffff88800d643100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.677412] ================================================================== [ 30.678565] Disabling lock debugging due to kernel taint [ 32.594722] BUG: Bad rss-counter state mm:0000000081458ec7 type:MM_FILEPAGES val:33 [ 32.595837] BUG: Bad rss-counter state mm:0000000081458ec7 type:MM_ANONPAGES val:22 [ 33.025602] BUG: Bad rss-counter state mm:000000004a0619e4 type:MM_FILEPAGES val:33 [ 33.027026] BUG: Bad rss-counter state mm:000000004a0619e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50474' (ECDSA) to the list of known hosts. 2023/06/20 11:36:45 fuzzer started 2023/06/20 11:36:46 dialing manager at localhost:36067 2023/06/20 11:36:46 checking machine... 2023/06/20 11:36:46 checking revisions... [ 33.701734] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:36:46 testing simple program... [ 33.751833] cgroup: Unknown subsys name 'net' [ 33.785789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:36:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81f57c84 RDX=ffff88800f21d1c0 RSI=0000000000000012 RDI=0000000000000003 RBP=ffffffff849c8d00 RSP=ffff88800fe8fa60 R8 =0000000000000003 R9 =000000000000000f R10=000000000000001f R11=0000000000000000 R12=000000000000001f R13=0000000000000003 R14=000000000000000e R15=dffffc0000000000 RIP=ffffffff814c04a0 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 00007f502dee3900 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=00007fff1c6e9000 CR3=000000000ca06000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff888008e379a0 RDX=1ffff110011c6f2b RSI=ffffffff813ad720 RDI=ffff888008e379c8 RBP=ffff888008e37998 RSP=ffff888008e378f8 R8 =0000000000000001 R9 =ffff888008e37940 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e379c8 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff88801663b018 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 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=00007f6290941b80 CR3=000000000d5a8000 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=8ccf7dcbd15338ad304f37e74ab3e6ca XMM02=000000000011a518eff9b2d0a8fce9cb XMM03=000000000011a5e82c67c8bc2e329bc3 XMM04=9b1e2213fcee820900000000000ae988 XMM05=19e9129bd510f2350000000000131d80 XMM06=009fc21a5c66b8d60000000000130be8 XMM07=e042d86d42eb936e0000000000121eb8 XMM08=fd9fc037cecb7fc1000000000011a5e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000