[ 23.958508] BUG: Bad rss-counter state mm:0000000043fee707 type:MM_FILEPAGES val:33 [ 23.959058] BUG: Bad rss-counter state mm:0000000043fee707 type:MM_ANONPAGES val:22 [ 24.062474] ================================================================== [ 24.063552] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.064756] Read of size 8 at addr ffff88800973ded8 by task sshd/218 [ 24.065705] [ 24.065963] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.066537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.067100] Call Trace: [ 24.067279] [ 24.067439] dump_stack_lvl+0x91/0xf0 [ 24.067716] print_report+0xcc/0x620 [ 24.067986] ? __virt_addr_valid+0x102/0x340 [ 24.068301] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.068645] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.068990] kasan_report+0xbe/0xf0 [ 24.069277] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.069624] vma_interval_tree_remove+0xc75/0xec0 [ 24.069960] vma_prepare+0xc54/0x11a0 [ 24.070229] __split_vma+0x5af/0x950 [ 24.070492] ? __pfx___split_vma+0x10/0x10 [ 24.070793] ? find_held_lock+0x2c/0x110 [ 24.071086] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.071409] ? lock_is_held_type+0x9f/0x120 [ 24.071710] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.072052] ? mtree_range_walk+0x632/0x900 [ 24.072373] ? mas_walk+0x5c7/0x7c0 [ 24.072633] do_vmi_munmap+0x1f1/0x2b0 [ 24.072905] mmap_region+0x1f9/0x2660 [ 24.073173] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.073474] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.073880] ? __pfx_lock_acquire+0x10/0x10 [ 24.074188] ? __pfx_mmap_region+0x10/0x10 [ 24.074482] ? security_mmap_addr+0x7d/0xa0 [ 24.074773] ? get_unmapped_area+0x1f5/0x3f0 [ 24.075078] do_mmap+0x854/0xf00 [ 24.075329] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.075603] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.075909] ksys_mmap_pgoff+0x3af/0x500 [ 24.076193] do_syscall_64+0x3f/0x90 [ 24.076451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.076807] RIP: 0033:0x7ff7dc4bad82 [ 24.077060] 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 [ 24.078235] RSP: 002b:00007ffc37ecefe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.078742] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7dc4bad82 [ 24.079212] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7db8f4000 [ 24.079681] RBP: 00007ff7db8f4000 R08: 0000000000000009 R09: 0000000000001000 [ 24.080151] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bbfa7e4f70 [ 24.080618] R13: 00007ffc37ecf000 R14: 00007ffc37ecf030 R15: 00007ffc37ecf390 [ 24.081087] [ 24.081257] [ 24.081373] Allocated by task 209: [ 24.081607] kasan_save_stack+0x22/0x50 [ 24.081888] kasan_set_track+0x25/0x30 [ 24.082163] __kasan_slab_alloc+0x59/0x70 [ 24.082454] kmem_cache_alloc+0x16b/0x370 [ 24.082745] vm_area_dup+0x20/0x160 [ 24.082997] __split_vma+0x170/0x950 [ 24.083253] split_vma+0xc6/0x110 [ 24.083499] mprotect_fixup+0x8d2/0xb30 [ 24.083785] do_mprotect_pkey+0x87e/0xd40 [ 24.084070] __x64_sys_mprotect+0x78/0xc0 [ 24.084365] do_syscall_64+0x3f/0x90 [ 24.084632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.084993] [ 24.085116] Freed by task 209: [ 24.085355] kasan_save_stack+0x22/0x50 [ 24.085635] kasan_set_track+0x25/0x30 [ 24.085908] kasan_save_free_info+0x2b/0x50 [ 24.086204] __kasan_slab_free+0x10a/0x190 [ 24.086494] kmem_cache_free+0x10d/0x4d0 [ 24.086776] rcu_core+0x8c8/0x2860 [ 24.087022] __do_softirq+0x1b7/0x7d4 [ 24.087284] [ 24.087400] Last potentially related work creation: [ 24.087723] kasan_save_stack+0x22/0x50 [ 24.087999] __kasan_record_aux_stack+0x8e/0xa0 [ 24.088320] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.088669] remove_vma+0x139/0x170 [ 24.088915] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.089230] do_vmi_munmap+0x1f1/0x2b0 [ 24.089494] __vm_munmap+0x138/0x3a0 [ 24.089752] __x64_sys_munmap+0x59/0x80 [ 24.090020] do_syscall_64+0x3f/0x90 [ 24.090287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.090636] [ 24.090752] The buggy address belongs to the object at ffff88800973de80 [ 24.090752] which belongs to the cache vm_area_struct of size 168 [ 24.091566] The buggy address is located 88 bytes inside of [ 24.091566] freed 168-byte region [ffff88800973de80, ffff88800973df28) [ 24.092325] [ 24.092442] The buggy address belongs to the physical page: [ 24.092809] page:00000000f602a8bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x973d [ 24.093418] memcg:ffff88800da47d01 [ 24.093651] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.094007] page_type: 0xffffffff() [ 24.094257] raw: 0100000000000200 ffff8880087a0c80 ffffea000038c8c0 dead000000000004 [ 24.094766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da47d01 [ 24.095267] page dumped because: kasan: bad access detected [ 24.095632] [ 24.095751] Memory state around the buggy address: [ 24.096076] ffff88800973dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.096556] ffff88800973de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.097031] >ffff88800973de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.097497] ^ [ 24.097907] ffff88800973df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.098371] ffff88800973df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.098839] ================================================================== [ 24.099381] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.887715] BUG: Bad rss-counter state mm:00000000f1e753fe type:MM_FILEPAGES val:33 [ 25.888720] BUG: Bad rss-counter state mm:00000000f1e753fe type:MM_ANONPAGES val:22 [ 26.349430] BUG: Bad rss-counter state mm:000000002800225a type:MM_FILEPAGES val:33 [ 26.350653] BUG: Bad rss-counter state mm:000000002800225a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36838' (ECDSA) to the list of known hosts. 2023/06/21 03:13:49 fuzzer started 2023/06/21 03:13:49 dialing manager at localhost:36067 2023/06/21 03:13:49 checking machine... 2023/06/21 03:13:49 checking revisions... [ 27.048909] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:13:49 testing simple program... [ 27.088180] cgroup: Unknown subsys name 'net' [ 27.125859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:13:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000002f1 RCX=1ffff11001e7b931 RDX=1ffff110025d09fa RSI=ffffffff81f3bb95 RDI=ffff88801660fbdc RBP=ffff88801660fbd8 RSP=ffff88801660fa50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000008000 R11=0000000000000000 R12=ffff888012e84fd0 R13=0000000000007fff R14=00000000000002f1 R15=0000000000000031 RIP=ffffffff81f3bd0c 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 00007f7b11359900 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=00007fe18d40fc20 CR3=000000000da74000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe78e74000 CR3=000000000da74000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000