syzkaller login: [ 31.529566] BUG: Bad rss-counter state mm:0000000080dcb471 type:MM_FILEPAGES val:33 [ 31.530862] BUG: Bad rss-counter state mm:0000000080dcb471 type:MM_ANONPAGES val:22 [ 31.698578] ================================================================== [ 31.699502] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.700461] Read of size 8 at addr ffff88801a24d228 by task sshd/219 [ 31.701242] [ 31.701469] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.702552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.703547] Call Trace: [ 31.703874] [ 31.704160] dump_stack_lvl+0x91/0xf0 [ 31.704669] print_report+0xcc/0x620 [ 31.705176] ? __virt_addr_valid+0x102/0x340 [ 31.705762] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.706386] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.707003] kasan_report+0xbe/0xf0 [ 31.707496] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.708121] vma_interval_tree_remove+0xc75/0xec0 [ 31.708726] vma_prepare+0xc54/0x11a0 [ 31.709215] __split_vma+0x5af/0x950 [ 31.709700] ? __pfx___split_vma+0x10/0x10 [ 31.710228] ? find_held_lock+0x2c/0x110 [ 31.710755] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.711326] ? lock_is_held_type+0x9f/0x120 [ 31.711883] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.712490] ? mtree_range_walk+0x632/0x900 [ 31.713057] ? mas_walk+0x5c7/0x7c0 [ 31.713542] do_vmi_munmap+0x1f1/0x2b0 [ 31.714077] mmap_region+0x1f9/0x2660 [ 31.714570] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.715088] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.715805] ? __pfx_lock_acquire+0x10/0x10 [ 31.716343] ? __pfx_mmap_region+0x10/0x10 [ 31.716879] ? security_mmap_addr+0x7d/0xa0 [ 31.717414] ? get_unmapped_area+0x1f5/0x3f0 [ 31.717988] do_mmap+0x854/0xf00 [ 31.718427] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.718927] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.719503] ksys_mmap_pgoff+0x3af/0x500 [ 31.720022] do_syscall_64+0x3f/0x90 [ 31.720507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.721167] RIP: 0033:0x7f681ff1ad82 [ 31.721643] 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 [ 31.723781] RSP: 002b:00007ffc5b2a8488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.724712] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f681ff1ad82 [ 31.725596] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f681f354000 [ 31.726489] RBP: 00007f681f354000 R08: 0000000000000009 R09: 0000000000001000 [ 31.727376] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d065decb20 [ 31.728240] R13: 00007ffc5b2a84a0 R14: 00007ffc5b2a84d0 R15: 00007ffc5b2a8830 [ 31.729116] [ 31.729417] [ 31.729644] Allocated by task 212: [ 31.730090] kasan_save_stack+0x22/0x50 [ 31.730614] kasan_set_track+0x25/0x30 [ 31.731115] __kasan_slab_alloc+0x59/0x70 [ 31.731653] kmem_cache_alloc+0x16b/0x370 [ 31.732175] vm_area_dup+0x20/0x160 [ 31.732635] __split_vma+0x170/0x950 [ 31.733120] split_vma+0xc6/0x110 [ 31.733583] mprotect_fixup+0x8d2/0xb30 [ 31.734116] do_mprotect_pkey+0x87e/0xd40 [ 31.734661] __x64_sys_mprotect+0x78/0xc0 [ 31.735210] do_syscall_64+0x3f/0x90 [ 31.735715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.736403] [ 31.736632] Freed by task 202: [ 31.737047] kasan_save_stack+0x22/0x50 [ 31.737599] kasan_set_track+0x25/0x30 [ 31.738121] kasan_save_free_info+0x2b/0x50 [ 31.738679] __kasan_slab_free+0x10a/0x190 [ 31.739240] kmem_cache_free+0x10d/0x4d0 [ 31.739773] rcu_core+0x8c8/0x2860 [ 31.740239] __do_softirq+0x1b7/0x7d4 [ 31.740743] [ 31.740975] Last potentially related work creation: [ 31.741615] kasan_save_stack+0x22/0x50 [ 31.742147] __kasan_record_aux_stack+0x8e/0xa0 [ 31.742755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.743433] remove_vma+0x139/0x170 [ 31.743909] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.744500] do_vmi_munmap+0x1f1/0x2b0 [ 31.745009] __vm_munmap+0x138/0x3a0 [ 31.745512] __x64_sys_munmap+0x59/0x80 [ 31.746057] do_syscall_64+0x3f/0x90 [ 31.746557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.747236] [ 31.747464] The buggy address belongs to the object at ffff88801a24d1d0 [ 31.747464] which belongs to the cache vm_area_struct of size 168 [ 31.749037] The buggy address is located 88 bytes inside of [ 31.749037] freed 168-byte region [ffff88801a24d1d0, ffff88801a24d278) [ 31.750554] [ 31.750780] The buggy address belongs to the physical page: [ 31.751481] page:000000000dbace9f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a24d [ 31.752647] memcg:ffff88800f7a4001 [ 31.753100] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.753795] page_type: 0xffffffff() [ 31.754270] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.755242] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7a4001 [ 31.756209] page dumped because: kasan: bad access detected [ 31.756919] [ 31.757147] Memory state around the buggy address: [ 31.757771] ffff88801a24d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.758692] ffff88801a24d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.759603] >ffff88801a24d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.760520] ^ [ 31.761114] ffff88801a24d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.762024] ffff88801a24d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.762918] ================================================================== [ 31.764094] Disabling lock debugging due to kernel taint [ 33.756268] BUG: Bad rss-counter state mm:00000000a89e7e21 type:MM_FILEPAGES val:33 [ 33.757232] BUG: Bad rss-counter state mm:00000000a89e7e21 type:MM_ANONPAGES val:22 [ 34.268858] BUG: Bad rss-counter state mm:00000000fd4b3ed9 type:MM_FILEPAGES val:33 [ 34.269865] BUG: Bad rss-counter state mm:00000000fd4b3ed9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43189' (ECDSA) to the list of known hosts. 2023/06/20 11:54:40 fuzzer started 2023/06/20 11:54:41 dialing manager at localhost:36067 2023/06/20 11:54:41 checking machine... 2023/06/20 11:54:41 checking revisions... [ 35.039350] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:54:41 testing simple program... [ 35.087673] cgroup: Unknown subsys name 'net' [ 35.135478] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:54:40 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000041 RCX=ffffffffffffffff RDX=0000000000000001 RSI=00007f15a3f4fa00 RDI=00007f15a40c0e94 RBP=0000000000000001 RSP=00007ffeb3e469b8 R8 =000056340f428428 R9 =ffffffffffffff01 R10=0000000000000002 R11=000056340f427358 R12=000056340f428428 R13=00007f15a40baa20 R14=000056340f46a170 R15=0000000000000002 RIP=00007f15a38723e2 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f15a346f900 00000000 00000000 GS =0000 0000000000000000 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=00007f15a2895770 CR3=000000000d838000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=03307beb2c7161bf00000000000ae988 XMM05=4aac7d8aee2d860e0000000000133050 XMM06=a43e2dbe154c0f140000000000131df0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016030000 RBX=0000000000001000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffed1002c06200 RBP=ffff88800f2d7568 RSP=ffff88800f2d7510 R8 =ffff888016030000 R9 =0000000000000000 R10=ffffed1002c06000 R11=ffff88800fe7e000 R12=ffff888008442140 R13=0000000000082cc0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180af86 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 00007f22ea4ce900 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=00007fff10331000 CR3=0000000018cba000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000