syzkaller login: [ 31.023972] BUG: Bad rss-counter state mm:00000000ef3bf028 type:MM_FILEPAGES val:33 [ 31.025225] BUG: Bad rss-counter state mm:00000000ef3bf028 type:MM_ANONPAGES val:22 [ 31.065881] ================================================================== [ 31.066842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.067774] Read of size 8 at addr ffff88800e55e968 by task sshd/220 [ 31.068581] [ 31.068913] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.069781] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.070747] Call Trace: [ 31.071075] [ 31.071356] dump_stack_lvl+0x91/0xf0 [ 31.071840] print_report+0xcc/0x620 [ 31.072333] ? __virt_addr_valid+0x102/0x340 [ 31.072883] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073506] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074122] kasan_report+0xbe/0xf0 [ 31.074597] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.075214] vma_interval_tree_remove+0xc75/0xec0 [ 31.075816] vma_prepare+0xc54/0x11a0 [ 31.076309] __split_vma+0x5af/0x950 [ 31.076780] ? __pfx___split_vma+0x10/0x10 [ 31.077305] ? find_held_lock+0x2c/0x110 [ 31.077825] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.078386] ? lock_is_held_type+0x9f/0x120 [ 31.078933] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.079542] ? mtree_range_walk+0x632/0x900 [ 31.080088] ? mas_walk+0x5c7/0x7c0 [ 31.080580] do_vmi_munmap+0x1f1/0x2b0 [ 31.081072] mmap_region+0x1f9/0x2660 [ 31.081555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.082074] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.082782] ? __pfx_lock_acquire+0x10/0x10 [ 31.083308] ? __pfx_mmap_region+0x10/0x10 [ 31.083831] ? security_mmap_addr+0x7d/0xa0 [ 31.084361] ? get_unmapped_area+0x1f5/0x3f0 [ 31.084907] do_mmap+0x854/0xf00 [ 31.085340] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.085834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.086390] ksys_mmap_pgoff+0x3af/0x500 [ 31.086892] do_syscall_64+0x3f/0x90 [ 31.087368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.088014] RIP: 0033:0x7f292669ad82 [ 31.088470] 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 [ 31.090578] RSP: 002b:00007ffd582cdf48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.091468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f292669ad82 [ 31.092324] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2925ad4000 [ 31.093163] RBP: 00007f2925ad4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.093998] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585c0598ec0 [ 31.094835] R13: 00007ffd582cdf60 R14: 00007ffd582cdf90 R15: 00007ffd582ce2f0 [ 31.095691] [ 31.095983] [ 31.096199] Allocated by task 213: [ 31.096631] kasan_save_stack+0x22/0x50 [ 31.097131] kasan_set_track+0x25/0x30 [ 31.097627] __kasan_slab_alloc+0x59/0x70 [ 31.098148] kmem_cache_alloc+0x16b/0x370 [ 31.098658] vm_area_dup+0x20/0x160 [ 31.099107] __split_vma+0x170/0x950 [ 31.099569] split_vma+0xc6/0x110 [ 31.100001] mprotect_fixup+0x8d2/0xb30 [ 31.100515] do_mprotect_pkey+0x87e/0xd40 [ 31.101028] __x64_sys_mprotect+0x78/0xc0 [ 31.101548] do_syscall_64+0x3f/0x90 [ 31.102020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102660] [ 31.102874] Freed by task 203: [ 31.103262] kasan_save_stack+0x22/0x50 [ 31.103759] kasan_set_track+0x25/0x30 [ 31.104247] kasan_save_free_info+0x2b/0x50 [ 31.104785] __kasan_slab_free+0x10a/0x190 [ 31.105319] kmem_cache_free+0x10d/0x4d0 [ 31.105821] rcu_core+0x8c8/0x2860 [ 31.106264] __do_softirq+0x1b7/0x7d4 [ 31.106740] [ 31.106954] Last potentially related work creation: [ 31.107530] kasan_save_stack+0x22/0x50 [ 31.108027] __kasan_record_aux_stack+0x8e/0xa0 [ 31.108745] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.109588] remove_vma+0x139/0x170 [ 31.110139] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.110842] do_vmi_munmap+0x1f1/0x2b0 [ 31.111466] __vm_munmap+0x138/0x3a0 [ 31.112036] __x64_sys_munmap+0x59/0x80 [ 31.112667] do_syscall_64+0x3f/0x90 [ 31.113146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.113794] [ 31.114009] The buggy address belongs to the object at ffff88800e55e910 [ 31.114009] which belongs to the cache vm_area_struct of size 168 [ 31.115503] The buggy address is located 88 bytes inside of [ 31.115503] freed 168-byte region [ffff88800e55e910, ffff88800e55e9b8) [ 31.116931] [ 31.117145] The buggy address belongs to the physical page: [ 31.117796] page:00000000bed4f36a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe55e [ 31.118909] memcg:ffff88800d845601 [ 31.119335] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.119973] page_type: 0xffffffff() [ 31.120453] raw: 0100000000000200 ffff8880087a0c80 ffffea000035c080 dead000000000002 [ 31.121378] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d845601 [ 31.122294] page dumped because: kasan: bad access detected [ 31.122988] [ 31.123205] Memory state around the buggy address: [ 31.123788] ffff88800e55e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.124644] ffff88800e55e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.125495] >ffff88800e55e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.126342] ^ [ 31.127158] ffff88800e55e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.128007] ffff88800e55ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.128866] ================================================================== [ 31.129999] Disabling lock debugging due to kernel taint [ 33.219136] BUG: Bad rss-counter state mm:000000002f549670 type:MM_FILEPAGES val:33 [ 33.220662] BUG: Bad rss-counter state mm:000000002f549670 type:MM_ANONPAGES val:22 [ 33.721684] BUG: Bad rss-counter state mm:000000009ec20d41 type:MM_FILEPAGES val:33 [ 33.722682] BUG: Bad rss-counter state mm:000000009ec20d41 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26044' (ECDSA) to the list of known hosts. 2023/06/20 22:30:56 fuzzer started 2023/06/20 22:30:56 dialing manager at localhost:36067 2023/06/20 22:30:56 checking machine... 2023/06/20 22:30:56 checking revisions... [ 34.463348] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:30:56 testing simple program... [ 34.518506] cgroup: Unknown subsys name 'net' [ 34.584895] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:30:56 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff88800c4e0000 RCX=0000000000000100 RDX=000000000001c062 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800c4e0180 RSP=ffff88806ce09748 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=0000000000000000 R12=000000000001c062 R13=ffff88800c4e44c8 R14=0000000000000000 R15=ffff88800c4e0008 RIP=ffffffff8219168f RFL=00000046 [---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 00007f936de72900 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=00007f936e427650 CR3=000000001681c000 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=0000000000000050 RBX=ffff88800c4e0000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff88800ba777d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000000 R12=00000000000101f7 R13=ffffed100189c001 R14=ffffffff85a23960 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--S-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 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=00007fa9e0217000 CR3=000000000d836000 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=29fbdcb733bf419e5e49e122364e433b XMM02=eff9b2d0a8fce9cb000000000011a3c0 XMM03=2c67c8bc2e329bc3000000000011a4e8 XMM04=ee4498a55e249b3200000000000ae988 XMM05=b5dd0e90eebfa1f00000000000132de8 XMM06=4fda316b135da52b0000000000131bd8 XMM07=fb795ef6d65770560000000000121e68 XMM08=2c67c8bc2e329bc3000000000011a4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000