syzkaller login: [ 35.778379] BUG: Bad rss-counter state mm:00000000aa48be2d type:MM_FILEPAGES val:33 [ 35.779686] BUG: Bad rss-counter state mm:00000000aa48be2d type:MM_ANONPAGES val:22 [ 35.933638] ================================================================== [ 35.934543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.935470] Read of size 8 at addr ffff88801815d140 by task sshd/220 [ 35.936245] [ 35.936477] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.937512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.938487] Call Trace: [ 35.938809] [ 35.939093] dump_stack_lvl+0x91/0xf0 [ 35.939575] print_report+0xcc/0x620 [ 35.940056] ? __virt_addr_valid+0x102/0x340 [ 35.940602] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.941243] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.941856] kasan_report+0xbe/0xf0 [ 35.942338] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.942956] vma_interval_tree_remove+0xc75/0xec0 [ 35.943545] vma_prepare+0xc54/0x11a0 [ 35.944022] __split_vma+0x5af/0x950 [ 35.944490] ? __pfx___split_vma+0x10/0x10 [ 35.945027] ? find_held_lock+0x2c/0x110 [ 35.945543] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.946101] ? lock_is_held_type+0x9f/0x120 [ 35.946640] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.947250] ? mtree_range_walk+0x632/0x900 [ 35.947801] ? mas_walk+0x5c7/0x7c0 [ 35.948275] do_vmi_munmap+0x1f1/0x2b0 [ 35.948782] mmap_region+0x1f9/0x2660 [ 35.949263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.949774] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.950482] ? __pfx_lock_acquire+0x10/0x10 [ 35.951005] ? __pfx_mmap_region+0x10/0x10 [ 35.951529] ? security_mmap_addr+0x7d/0xa0 [ 35.952062] ? get_unmapped_area+0x1f5/0x3f0 [ 35.952607] do_mmap+0x854/0xf00 [ 35.953047] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.953536] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.954095] ksys_mmap_pgoff+0x3af/0x500 [ 35.954598] do_syscall_64+0x3f/0x90 [ 35.955069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.955717] RIP: 0033:0x7f42cd1fdd82 [ 35.956167] 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 [ 35.958297] RSP: 002b:00007ffe352abce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.959195] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42cd1fdd82 [ 35.960040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42cc637000 [ 35.960881] RBP: 00007f42cc637000 R08: 0000000000000009 R09: 0000000000001000 [ 35.961727] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d870ecbec0 [ 35.962579] R13: 00007ffe352abd00 R14: 00007ffe352abd30 R15: 00007ffe352ac090 [ 35.963454] [ 35.963754] [ 35.963975] Allocated by task 213: [ 35.964408] kasan_save_stack+0x22/0x50 [ 35.964940] kasan_set_track+0x25/0x30 [ 35.965448] __kasan_slab_alloc+0x59/0x70 [ 35.965989] kmem_cache_alloc+0x16b/0x370 [ 35.966517] vm_area_dup+0x20/0x160 [ 35.966981] __split_vma+0x170/0x950 [ 35.967462] split_vma+0xc6/0x110 [ 35.967917] mprotect_fixup+0x8d2/0xb30 [ 35.968440] do_mprotect_pkey+0x87e/0xd40 [ 35.968992] __x64_sys_mprotect+0x78/0xc0 [ 35.969530] do_syscall_64+0x3f/0x90 [ 35.970014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.970680] [ 35.970899] Freed by task 213: [ 35.971300] kasan_save_stack+0x22/0x50 [ 35.971829] kasan_set_track+0x25/0x30 [ 35.972332] kasan_save_free_info+0x2b/0x50 [ 35.972879] __kasan_slab_free+0x10a/0x190 [ 35.973426] kmem_cache_free+0x10d/0x4d0 [ 35.973950] rcu_core+0x8c8/0x2860 [ 35.974408] __do_softirq+0x1b7/0x7d4 [ 35.974895] [ 35.975115] Last potentially related work creation: [ 35.975726] kasan_save_stack+0x22/0x50 [ 35.976242] __kasan_record_aux_stack+0x8e/0xa0 [ 35.976854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.977515] remove_vma+0x139/0x170 [ 35.978055] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.978635] do_vmi_munmap+0x1f1/0x2b0 [ 35.979130] __vm_munmap+0x138/0x3a0 [ 35.979615] __x64_sys_munmap+0x59/0x80 [ 35.980123] do_syscall_64+0x3f/0x90 [ 35.980617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.981290] [ 35.981511] The buggy address belongs to the object at ffff88801815d0e8 [ 35.981511] which belongs to the cache vm_area_struct of size 168 [ 35.983042] The buggy address is located 88 bytes inside of [ 35.983042] freed 168-byte region [ffff88801815d0e8, ffff88801815d190) [ 35.984491] [ 35.984713] The buggy address belongs to the physical page: [ 35.985411] page:00000000dfd5d4f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1815d [ 35.986538] memcg:ffff88801643ab01 [ 35.986982] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.987651] page_type: 0xffffffff() [ 35.988113] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.989075] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801643ab01 [ 35.990017] page dumped because: kasan: bad access detected [ 35.990701] [ 35.990921] Memory state around the buggy address: [ 35.991519] ffff88801815d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.992413] ffff88801815d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.993322] >ffff88801815d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.994200] ^ [ 35.994866] ffff88801815d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.995770] ffff88801815d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.996654] ================================================================== [ 35.997648] Disabling lock debugging due to kernel taint [ 37.958124] BUG: Bad rss-counter state mm:00000000dc2f6e37 type:MM_FILEPAGES val:33 [ 37.959290] BUG: Bad rss-counter state mm:00000000dc2f6e37 type:MM_ANONPAGES val:22 [ 38.442348] BUG: Bad rss-counter state mm:0000000049c5acc0 type:MM_FILEPAGES val:33 [ 38.443526] BUG: Bad rss-counter state mm:0000000049c5acc0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32023' (ECDSA) to the list of known hosts. 2023/06/19 20:35:16 fuzzer started 2023/06/19 20:35:16 dialing manager at localhost:44161 2023/06/19 20:35:16 checking machine... 2023/06/19 20:35:16 checking revisions... [ 39.160841] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:35:16 testing simple program... [ 39.203181] cgroup: Unknown subsys name 'net' [ 39.255261] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:35:10 Registers: info registers vcpu 0 RAX=0000000000001000 RBX=ffff8880164e7e18 RCX=0000000000000000 RDX=0000000000000090 RSI=ffff8880164e7ce0 RDI=00007ffc77a280a0 RBP=1ffff11002c9cf96 RSP=ffff8880164e7ca8 R8 =0000000000000005 R9 =00000000ffffffff R10=0000000000000000 R11=0000000000000001 R12=00007ffc77a280a0 R13=ffffffff854ee9e0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8217c5a4 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 00007fba4b240900 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=00007fba4b7f5650 CR3=000000000e150000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007ffef187bca8 CR3=000000000e496000 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=2035313a35333a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a35333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000