syzkaller login: [ 31.568620] BUG: Bad rss-counter state mm:000000008d59f337 type:MM_FILEPAGES val:33 [ 31.569832] BUG: Bad rss-counter state mm:000000008d59f337 type:MM_ANONPAGES val:22 [ 31.718707] ================================================================== [ 31.719868] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.721046] Read of size 8 at addr ffff888019262880 by task sshd/221 [ 31.722197] [ 31.722470] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.723555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.724810] Call Trace: [ 31.725214] [ 31.725568] dump_stack_lvl+0x91/0xf0 [ 31.726087] print_report+0xcc/0x620 [ 31.726547] ? __virt_addr_valid+0x102/0x340 [ 31.727067] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.727650] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.728236] kasan_report+0xbe/0xf0 [ 31.728686] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.729298] vma_interval_tree_remove+0xc75/0xec0 [ 31.729890] vma_prepare+0xc54/0x11a0 [ 31.730363] __split_vma+0x5af/0x950 [ 31.730822] ? __pfx___split_vma+0x10/0x10 [ 31.731339] ? find_held_lock+0x2c/0x110 [ 31.731848] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.732403] ? lock_is_held_type+0x9f/0x120 [ 31.732948] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.733555] ? mtree_range_walk+0x632/0x900 [ 31.734101] ? mas_walk+0x5c7/0x7c0 [ 31.734569] do_vmi_munmap+0x1f1/0x2b0 [ 31.735048] mmap_region+0x1f9/0x2660 [ 31.735537] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.736043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.736764] ? __pfx_lock_acquire+0x10/0x10 [ 31.737299] ? __pfx_mmap_region+0x10/0x10 [ 31.737812] ? security_mmap_addr+0x7d/0xa0 [ 31.738340] ? get_unmapped_area+0x1f5/0x3f0 [ 31.738878] do_mmap+0x854/0xf00 [ 31.739318] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.739812] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.740375] ksys_mmap_pgoff+0x3af/0x500 [ 31.740932] do_syscall_64+0x3f/0x90 [ 31.741410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.742062] RIP: 0033:0x7f1f15cfcd82 [ 31.742525] 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 [ 31.744680] RSP: 002b:00007ffc1c2b4078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.745619] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f15cfcd82 [ 31.746487] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f15136000 [ 31.747360] RBP: 00007f1f15136000 R08: 0000000000000009 R09: 0000000000001000 [ 31.748225] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627a675dec0 [ 31.749095] R13: 00007ffc1c2b4090 R14: 00007ffc1c2b40c0 R15: 00007ffc1c2b4420 [ 31.749958] [ 31.750256] [ 31.750473] Allocated by task 214: [ 31.750907] kasan_save_stack+0x22/0x50 [ 31.751419] kasan_set_track+0x25/0x30 [ 31.751918] __kasan_slab_alloc+0x59/0x70 [ 31.752446] kmem_cache_alloc+0x16b/0x370 [ 31.752981] vm_area_dup+0x20/0x160 [ 31.753444] __split_vma+0x170/0x950 [ 31.753909] split_vma+0xc6/0x110 [ 31.754358] mprotect_fixup+0x8d2/0xb30 [ 31.754869] do_mprotect_pkey+0x87e/0xd40 [ 31.755400] __x64_sys_mprotect+0x78/0xc0 [ 31.755925] do_syscall_64+0x3f/0x90 [ 31.756409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.757064] [ 31.757282] Freed by task 19: [ 31.757672] kasan_save_stack+0x22/0x50 [ 31.758181] kasan_set_track+0x25/0x30 [ 31.758685] kasan_save_free_info+0x2b/0x50 [ 31.759225] __kasan_slab_free+0x10a/0x190 [ 31.759762] kmem_cache_free+0x10d/0x4d0 [ 31.760274] rcu_core+0x8c8/0x2860 [ 31.760726] __do_softirq+0x1b7/0x7d4 [ 31.761231] [ 31.761447] Last potentially related work creation: [ 31.762048] kasan_save_stack+0x22/0x50 [ 31.762555] __kasan_record_aux_stack+0x8e/0xa0 [ 31.763226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.763876] remove_vma+0x139/0x170 [ 31.764333] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.764900] do_vmi_munmap+0x1f1/0x2b0 [ 31.765391] __vm_munmap+0x138/0x3a0 [ 31.765866] __x64_sys_munmap+0x59/0x80 [ 31.766364] do_syscall_64+0x3f/0x90 [ 31.766842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.767486] [ 31.767701] The buggy address belongs to the object at ffff888019262828 [ 31.767701] which belongs to the cache vm_area_struct of size 168 [ 31.769204] The buggy address is located 88 bytes inside of [ 31.769204] freed 168-byte region [ffff888019262828, ffff8880192628d0) [ 31.770628] [ 31.770847] The buggy address belongs to the physical page: [ 31.771517] page:00000000c414e429 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19262 [ 31.772625] memcg:ffff88800fc68501 [ 31.773128] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.773786] page_type: 0xffffffff() [ 31.774251] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.775183] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc68501 [ 31.776100] page dumped because: kasan: bad access detected [ 31.776784] [ 31.777010] Memory state around the buggy address: [ 31.777599] ffff888019262780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.778471] ffff888019262800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.779338] >ffff888019262880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.780205] ^ [ 31.780628] ffff888019262900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.781526] ffff888019262980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.782410] ================================================================== [ 31.783506] Disabling lock debugging due to kernel taint [ 33.752161] BUG: Bad rss-counter state mm:00000000eaf02369 type:MM_FILEPAGES val:33 [ 33.753087] BUG: Bad rss-counter state mm:00000000eaf02369 type:MM_ANONPAGES val:22 [ 34.293877] BUG: Bad rss-counter state mm:000000006910b498 type:MM_FILEPAGES val:33 [ 34.295280] BUG: Bad rss-counter state mm:000000006910b498 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32856' (ECDSA) to the list of known hosts. 2023/06/19 15:07:08 fuzzer started 2023/06/19 15:07:08 dialing manager at localhost:44161 2023/06/19 15:07:08 checking machine... 2023/06/19 15:07:08 checking revisions... [ 34.906949] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:07:08 testing simple program... [ 34.947492] cgroup: Unknown subsys name 'net' [ 34.990128] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:07:07 Registers: info registers vcpu 0 RAX=ffffed1001fe0940 RBX=ffffed1001fe0941 RCX=ffffffff8451836e RDX=ffffed1001fe0941 RSI=0000000000000004 RDI=ffff88800ff04a00 RBP=ffffed1001fe0940 RSP=ffff88801009fd88 R8 =0000000000000001 R9 =ffffed1001fe0940 R10=ffff88800ff04a03 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff8880160c0000 R14=ffff888008d71fe8 R15=ffff888008d71b40 RIP=ffffffff8180f009 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 00007fdc1b504900 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=00007fdc1babb618 CR3=00000000181c2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=ffff88806cf09bd8 RSI=0000000000000000 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff860d68fa R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888006887678 RIP=ffffffff81130340 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 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=00007f7e32167000 CR3=000000000f242000 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=2037303a37303a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a37303a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000