syzkaller login: [ 33.327175] BUG: Bad rss-counter state mm:0000000033abbe55 type:MM_FILEPAGES val:33 [ 33.328240] BUG: Bad rss-counter state mm:0000000033abbe55 type:MM_ANONPAGES val:22 [ 33.440663] ================================================================== [ 33.441220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.441791] Read of size 8 at addr ffff88800a037798 by task sshd/220 [ 33.442250] [ 33.442388] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.442908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.443487] Call Trace: [ 33.443681] [ 33.443852] dump_stack_lvl+0x91/0xf0 [ 33.444152] print_report+0xcc/0x620 [ 33.444443] ? __virt_addr_valid+0x102/0x340 [ 33.444790] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.445158] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.445527] kasan_report+0xbe/0xf0 [ 33.445999] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.446372] vma_interval_tree_remove+0xc75/0xec0 [ 33.446736] vma_prepare+0xc54/0x11a0 [ 33.447025] __split_vma+0x5af/0x950 [ 33.447308] ? __pfx___split_vma+0x10/0x10 [ 33.447626] ? find_held_lock+0x2c/0x110 [ 33.447941] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.448298] ? lock_is_held_type+0x9f/0x120 [ 33.448624] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.449007] ? mtree_range_walk+0x632/0x900 [ 33.449342] ? mas_walk+0x5c7/0x7c0 [ 33.449628] do_vmi_munmap+0x1f1/0x2b0 [ 33.449924] mmap_region+0x1f9/0x2660 [ 33.450214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.450523] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.450958] ? __pfx_lock_acquire+0x10/0x10 [ 33.451279] ? __pfx_mmap_region+0x10/0x10 [ 33.451596] ? security_mmap_addr+0x7d/0xa0 [ 33.451916] ? get_unmapped_area+0x1f5/0x3f0 [ 33.452242] do_mmap+0x854/0xf00 [ 33.452506] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.452809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.453145] ksys_mmap_pgoff+0x3af/0x500 [ 33.453445] do_syscall_64+0x3f/0x90 [ 33.453729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.454112] RIP: 0033:0x7f661f7aad82 [ 33.454386] 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 [ 33.455638] RSP: 002b:00007ffc962ddd48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.456178] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f661f7aad82 [ 33.456690] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f661ebe4000 [ 33.457193] RBP: 00007f661ebe4000 R08: 0000000000000009 R09: 0000000000001000 [ 33.457699] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce901b6f70 [ 33.458203] R13: 00007ffc962ddd60 R14: 00007ffc962ddd90 R15: 00007ffc962de0f0 [ 33.458711] [ 33.458886] [ 33.459016] Allocated by task 213: [ 33.459278] kasan_save_stack+0x22/0x50 [ 33.459582] kasan_set_track+0x25/0x30 [ 33.459878] __kasan_slab_alloc+0x59/0x70 [ 33.460190] kmem_cache_alloc+0x16b/0x370 [ 33.460495] vm_area_dup+0x20/0x160 [ 33.460785] __split_vma+0x170/0x950 [ 33.461066] split_vma+0xc6/0x110 [ 33.461329] mprotect_fixup+0x8d2/0xb30 [ 33.461632] do_mprotect_pkey+0x87e/0xd40 [ 33.461948] __x64_sys_mprotect+0x78/0xc0 [ 33.462257] do_syscall_64+0x3f/0x90 [ 33.462540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.462922] [ 33.463051] Freed by task 203: [ 33.463284] kasan_save_stack+0x22/0x50 [ 33.463586] kasan_set_track+0x25/0x30 [ 33.463880] kasan_save_free_info+0x2b/0x50 [ 33.464196] __kasan_slab_free+0x10a/0x190 [ 33.464515] kmem_cache_free+0x10d/0x4d0 [ 33.464827] rcu_core+0x8c8/0x2860 [ 33.465095] __do_softirq+0x1b7/0x7d4 [ 33.465379] [ 33.465508] Last potentially related work creation: [ 33.465860] kasan_save_stack+0x22/0x50 [ 33.466158] __kasan_record_aux_stack+0x8e/0xa0 [ 33.466501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.466890] remove_vma+0x139/0x170 [ 33.467157] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.467489] do_vmi_munmap+0x1f1/0x2b0 [ 33.467787] __vm_munmap+0x138/0x3a0 [ 33.468066] __x64_sys_munmap+0x59/0x80 [ 33.468360] do_syscall_64+0x3f/0x90 [ 33.468650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.469036] [ 33.469167] The buggy address belongs to the object at ffff88800a037740 [ 33.469167] which belongs to the cache vm_area_struct of size 168 [ 33.470036] The buggy address is located 88 bytes inside of [ 33.470036] freed 168-byte region [ffff88800a037740, ffff88800a0377e8) [ 33.470865] [ 33.470994] The buggy address belongs to the physical page: [ 33.471382] page:0000000071ab9a22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa037 [ 33.472015] memcg:ffff88800ea7f401 [ 33.472268] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.472658] page_type: 0xffffffff() [ 33.472929] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.473470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea7f401 [ 33.474005] page dumped because: kasan: bad access detected [ 33.474392] [ 33.474523] Memory state around the buggy address: [ 33.474864] ffff88800a037680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.475367] ffff88800a037700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.475865] >ffff88800a037780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.476365] ^ [ 33.476662] ffff88800a037800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.477166] ffff88800a037880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.477666] ================================================================== [ 33.478195] Disabling lock debugging due to kernel taint [ 35.667647] BUG: Bad rss-counter state mm:00000000f6c358fb type:MM_FILEPAGES val:33 [ 35.668624] BUG: Bad rss-counter state mm:00000000f6c358fb type:MM_ANONPAGES val:22 [ 36.187663] BUG: Bad rss-counter state mm:000000008dd4d2ec type:MM_FILEPAGES val:33 [ 36.189055] BUG: Bad rss-counter state mm:000000008dd4d2ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32251' (ECDSA) to the list of known hosts. 2023/06/19 15:19:58 fuzzer started 2023/06/19 15:19:58 dialing manager at localhost:44161 2023/06/19 15:19:58 checking machine... 2023/06/19 15:19:58 checking revisions... [ 36.939424] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:19:58 testing simple program... [ 36.994857] cgroup: Unknown subsys name 'net' [ 37.043633] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:19:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce39500 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806ce39504 RBP=ffff888015cd78a8 RSP=ffff888015cd7760 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff88806ce39500 R13=00000000000cdcf3 R14=0000000000000000 R15=ffff888008c58000 RIP=ffffffff812dffea RFL=00000086 [--S--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 00007f2a8b8bc900 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=00007f2a8ad4c5b0 CR3=0000000009f2c000 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=e24e0705c342a79bed4f7205240e0dbc XMM02=000000000011e4a0ec2efd57dc4c00df XMM03=0000000000124d68cc25af02612a3b3c XMM04=7453048d291981ab00000000000ae988 XMM05=e4cb8bb95a7664b600000000001348f0 XMM06=7370a2f5e744857e0000000000133758 XMM07=e042d86d42eb936e0000000000124fe8 XMM08=cc25af02612a3b3c000000000011e500 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fcf3c5c5618 CR3=000000000c7b2000 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=2037353a39313a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a39313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000