syzkaller login: [ 30.542580] BUG: Bad rss-counter state mm:00000000659a570e type:MM_FILEPAGES val:33 [ 30.543633] BUG: Bad rss-counter state mm:00000000659a570e type:MM_ANONPAGES val:22 [ 30.635268] ================================================================== [ 30.635954] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.636694] Read of size 8 at addr ffff888018071140 by task sshd/221 [ 30.637296] [ 30.637464] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.638133] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.638883] Call Trace: [ 30.639124] [ 30.639353] dump_stack_lvl+0x91/0xf0 [ 30.639854] print_report+0xcc/0x620 [ 30.640246] ? __virt_addr_valid+0x102/0x340 [ 30.640670] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.641141] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.641632] kasan_report+0xbe/0xf0 [ 30.642029] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.642513] vma_interval_tree_remove+0xc75/0xec0 [ 30.642975] vma_prepare+0xc54/0x11a0 [ 30.643358] __split_vma+0x5af/0x950 [ 30.643618] ? __pfx___split_vma+0x10/0x10 [ 30.643910] ? find_held_lock+0x2c/0x110 [ 30.644205] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.644518] ? lock_is_held_type+0x9f/0x120 [ 30.644818] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.645149] ? mtree_range_walk+0x632/0x900 [ 30.645463] ? mas_walk+0x5c7/0x7c0 [ 30.645725] do_vmi_munmap+0x1f1/0x2b0 [ 30.646000] mmap_region+0x1f9/0x2660 [ 30.646271] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.646554] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.646945] ? __pfx_lock_acquire+0x10/0x10 [ 30.647249] ? __pfx_mmap_region+0x10/0x10 [ 30.647543] ? security_mmap_addr+0x7d/0xa0 [ 30.647843] ? get_unmapped_area+0x1f5/0x3f0 [ 30.648144] do_mmap+0x854/0xf00 [ 30.648388] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.648658] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.648966] ksys_mmap_pgoff+0x3af/0x500 [ 30.649259] do_syscall_64+0x3f/0x90 [ 30.649524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.649890] RIP: 0033:0x7fe5e7f43d82 [ 30.650140] 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 [ 30.651319] RSP: 002b:00007ffe44e48338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.651821] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5e7f43d82 [ 30.652289] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5e737d000 [ 30.652749] RBP: 00007fe5e737d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.653225] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f03dfb9980 [ 30.653689] R13: 00007ffe44e48350 R14: 00007ffe44e48380 R15: 00007ffe44e486e0 [ 30.654172] [ 30.654343] [ 30.654462] Allocated by task 214: [ 30.654698] kasan_save_stack+0x22/0x50 [ 30.654976] kasan_set_track+0x25/0x30 [ 30.655253] __kasan_slab_alloc+0x59/0x70 [ 30.655543] kmem_cache_alloc+0x16b/0x370 [ 30.655823] vm_area_dup+0x20/0x160 [ 30.656070] __split_vma+0x170/0x950 [ 30.656337] split_vma+0xc6/0x110 [ 30.656583] mprotect_fixup+0x8d2/0xb30 [ 30.656865] do_mprotect_pkey+0x87e/0xd40 [ 30.657152] __x64_sys_mprotect+0x78/0xc0 [ 30.657450] do_syscall_64+0x3f/0x90 [ 30.657709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.658065] [ 30.658184] Freed by task 13: [ 30.658405] kasan_save_stack+0x22/0x50 [ 30.658682] kasan_set_track+0x25/0x30 [ 30.658951] kasan_save_free_info+0x2b/0x50 [ 30.659249] __kasan_slab_free+0x10a/0x190 [ 30.659541] kmem_cache_free+0x10d/0x4d0 [ 30.659818] rcu_core+0x8c8/0x2860 [ 30.660057] __do_softirq+0x1b7/0x7d4 [ 30.660323] [ 30.660443] Last potentially related work creation: [ 30.660766] kasan_save_stack+0x22/0x50 [ 30.661039] __kasan_record_aux_stack+0x8e/0xa0 [ 30.661362] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.661712] remove_vma+0x139/0x170 [ 30.661975] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.662288] do_vmi_munmap+0x1f1/0x2b0 [ 30.662556] __vm_munmap+0x138/0x3a0 [ 30.662806] __x64_sys_munmap+0x59/0x80 [ 30.663080] do_syscall_64+0x3f/0x90 [ 30.663345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.663696] [ 30.663816] The buggy address belongs to the object at ffff8880180710e8 [ 30.663816] which belongs to the cache vm_area_struct of size 168 [ 30.664631] The buggy address is located 88 bytes inside of [ 30.664631] freed 168-byte region [ffff8880180710e8, ffff888018071190) [ 30.665409] [ 30.665530] The buggy address belongs to the physical page: [ 30.665908] page:00000000da07272c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18071 [ 30.666507] memcg:ffff888016a03801 [ 30.666746] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.667106] page_type: 0xffffffff() [ 30.667361] raw: 0100000000000200 ffff88800879fc80 ffffea0000375a00 dead000000000002 [ 30.667865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a03801 [ 30.668365] page dumped because: kasan: bad access detected [ 30.668723] [ 30.668840] Memory state around the buggy address: [ 30.669159] ffff888018071000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.669637] ffff888018071080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.670115] >ffff888018071100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.670640] ^ [ 30.671019] ffff888018071180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.671496] ffff888018071200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.671960] ================================================================== [ 30.672660] Disabling lock debugging due to kernel taint [ 32.667503] BUG: Bad rss-counter state mm:00000000466b0e84 type:MM_FILEPAGES val:33 [ 32.668647] BUG: Bad rss-counter state mm:00000000466b0e84 type:MM_ANONPAGES val:22 [ 33.174577] BUG: Bad rss-counter state mm:0000000083dca32b type:MM_FILEPAGES val:33 [ 33.175766] BUG: Bad rss-counter state mm:0000000083dca32b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61042' (ECDSA) to the list of known hosts. 2023/06/19 19:29:08 fuzzer started 2023/06/19 19:29:09 dialing manager at localhost:44161 2023/06/19 19:29:09 checking machine... 2023/06/19 19:29:09 checking revisions... [ 33.790553] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:29:09 testing simple program... [ 33.845316] cgroup: Unknown subsys name 'net' [ 33.912340] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:29:08 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fd53 RSP=ffff88801673f828 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000246 R13=0000000000000000 R14=ffff888009d4e048 R15=ffff888009d4e000 RIP=ffffffff8153437e RFL=00000047 [---Z-PC] 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 00007f2312f21700 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=00007fddb52260b0 CR3=0000000009b7e000 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=2038303a39323a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a39323a3931203931 XMM08=3d656e696c646d632022656369767265 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=00007fb8c218f000 CR3=000000000c6ce000 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=10d5aec52604a7a18a4790ef7742f363 XMM02=ec2efd57dc4c00df000000000011d220 XMM03=c874481328970895000000000011d2f0 XMM04=181ad9b48675f0f600000000000ae988 XMM05=e4cb8bb95a7664b60000000000133af8 XMM06=6e38a768b99fc4dc0000000000132960 XMM07=e042d86d42eb936e0000000000123f10 XMM08=c874481328970895000000000011d2f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000