syzkaller login: [ 36.333263] BUG: Bad rss-counter state mm:000000001d7d153c type:MM_FILEPAGES val:33 [ 36.334566] BUG: Bad rss-counter state mm:000000001d7d153c type:MM_ANONPAGES val:22 [ 36.490935] ================================================================== [ 36.491838] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.492789] Read of size 8 at addr ffff8880145cab38 by task sshd/220 [ 36.493560] [ 36.493901] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.494827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.495917] Call Trace: [ 36.496265] [ 36.496582] dump_stack_lvl+0x91/0xf0 [ 36.497141] print_report+0xcc/0x620 [ 36.497669] ? __virt_addr_valid+0x102/0x340 [ 36.498270] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.498940] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.499600] kasan_report+0xbe/0xf0 [ 36.500106] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.500772] vma_interval_tree_remove+0xc75/0xec0 [ 36.501431] vma_prepare+0xc54/0x11a0 [ 36.501942] __split_vma+0x5af/0x950 [ 36.502461] ? __pfx___split_vma+0x10/0x10 [ 36.503036] ? find_held_lock+0x2c/0x110 [ 36.503593] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.504195] ? lock_is_held_type+0x9f/0x120 [ 36.504774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.505446] ? mtree_range_walk+0x632/0x900 [ 36.506035] ? mas_walk+0x5c7/0x7c0 [ 36.506541] do_vmi_munmap+0x1f1/0x2b0 [ 36.507079] mmap_region+0x1f9/0x2660 [ 36.507600] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.508156] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.508932] ? __pfx_lock_acquire+0x10/0x10 [ 36.509535] ? __pfx_mmap_region+0x10/0x10 [ 36.510117] ? security_mmap_addr+0x7d/0xa0 [ 36.510678] ? get_unmapped_area+0x1f5/0x3f0 [ 36.511259] do_mmap+0x854/0xf00 [ 36.511734] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.512252] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.512853] ksys_mmap_pgoff+0x3af/0x500 [ 36.513389] do_syscall_64+0x3f/0x90 [ 36.513866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.514510] RIP: 0033:0x7f135ff30d82 [ 36.514963] 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 [ 36.517104] RSP: 002b:00007ffd8b410ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.518015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f135ff30d82 [ 36.518873] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f135f36a000 [ 36.519723] RBP: 00007f135f36a000 R08: 0000000000000009 R09: 0000000000001000 [ 36.520569] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591f5758ec0 [ 36.521426] R13: 00007ffd8b410b00 R14: 00007ffd8b410b30 R15: 00007ffd8b410e90 [ 36.522289] [ 36.522581] [ 36.522795] Allocated by task 213: [ 36.523235] kasan_save_stack+0x22/0x50 [ 36.523747] kasan_set_track+0x25/0x30 [ 36.524250] __kasan_slab_alloc+0x59/0x70 [ 36.524775] kmem_cache_alloc+0x16b/0x370 [ 36.525303] vm_area_dup+0x20/0x160 [ 36.525753] __split_vma+0x170/0x950 [ 36.526224] split_vma+0xc6/0x110 [ 36.526672] mprotect_fixup+0x8d2/0xb30 [ 36.527173] do_mprotect_pkey+0x87e/0xd40 [ 36.527692] __x64_sys_mprotect+0x78/0xc0 [ 36.528215] do_syscall_64+0x3f/0x90 [ 36.528691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.529350] [ 36.529567] Freed by task 213: [ 36.529964] kasan_save_stack+0x22/0x50 [ 36.530471] kasan_set_track+0x25/0x30 [ 36.530969] kasan_save_free_info+0x2b/0x50 [ 36.531507] __kasan_slab_free+0x10a/0x190 [ 36.532042] kmem_cache_free+0x10d/0x4d0 [ 36.532590] rcu_core+0x8c8/0x2860 [ 36.533060] __do_softirq+0x1b7/0x7d4 [ 36.533551] [ 36.533776] Last potentially related work creation: [ 36.534394] kasan_save_stack+0x22/0x50 [ 36.534925] __kasan_record_aux_stack+0x8e/0xa0 [ 36.535528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.536217] remove_vma+0x139/0x170 [ 36.536689] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.537302] do_vmi_munmap+0x1f1/0x2b0 [ 36.537821] __vm_munmap+0x138/0x3a0 [ 36.538338] __x64_sys_munmap+0x59/0x80 [ 36.538860] do_syscall_64+0x3f/0x90 [ 36.539359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.540034] [ 36.540261] The buggy address belongs to the object at ffff8880145caae0 [ 36.540261] which belongs to the cache vm_area_struct of size 168 [ 36.541838] The buggy address is located 88 bytes inside of [ 36.541838] freed 168-byte region [ffff8880145caae0, ffff8880145cab88) [ 36.543338] [ 36.543563] The buggy address belongs to the physical page: [ 36.544250] page:00000000f46d8eef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145ca [ 36.545429] memcg:ffff888015bd8001 [ 36.545891] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.546578] page_type: 0xffffffff() [ 36.547060] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.548050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015bd8001 [ 36.549030] page dumped because: kasan: bad access detected [ 36.549732] [ 36.549954] Memory state around the buggy address: [ 36.550562] ffff8880145caa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.551457] ffff8880145caa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 36.552353] >ffff8880145cab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.553248] ^ [ 36.553883] ffff8880145cab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.554781] ffff8880145cac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.555672] ================================================================== [ 36.556674] Disabling lock debugging due to kernel taint [ 38.728907] BUG: Bad rss-counter state mm:000000004056a13b type:MM_FILEPAGES val:33 [ 38.730088] BUG: Bad rss-counter state mm:000000004056a13b type:MM_ANONPAGES val:22 [ 39.280623] BUG: Bad rss-counter state mm:00000000ec759a74 type:MM_FILEPAGES val:33 [ 39.281634] BUG: Bad rss-counter state mm:00000000ec759a74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24717' (ECDSA) to the list of known hosts. 2023/06/19 21:33:16 fuzzer started 2023/06/19 21:33:16 dialing manager at localhost:44161 2023/06/19 21:33:16 checking machine... 2023/06/19 21:33:16 checking revisions... [ 39.916502] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:33:16 testing simple program... [ 39.957014] cgroup: Unknown subsys name 'net' [ 39.993798] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:33:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f1358f96af0 CR3=000000000c4c0000 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=b9647b656ef922bf5048819cc78723c6 XMM02=000000000011d0c0ec2efd57dc4c00df XMM03=00000000001246380dddbd77bda4b62e XMM04=25ec9d13ee1c40ae00000000000ae988 XMM05=19e9129bd510f23500000000001341d0 XMM06=58a42ede3c14f1ab0000000000133038 XMM07=e042d86d42eb936e00000000001248b8 XMM08=0dddbd77bda4b62e000000000011d120 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=ffff888008c58400 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=00007f29e00cf0b0 CR3=000000000eef6000 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=2035313a33333a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a33333a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000