[ 23.741722] BUG: Bad rss-counter state mm:00000000d191c695 type:MM_FILEPAGES val:33 [ 23.742358] BUG: Bad rss-counter state mm:00000000d191c695 type:MM_ANONPAGES val:22 [ 23.844172] ================================================================== [ 23.844735] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.845327] Read of size 8 at addr ffff888019df05c8 by task sshd/218 [ 23.845818] [ 23.845952] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 23.846493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.847113] Call Trace: [ 23.847313] [ 23.847497] dump_stack_lvl+0x91/0xf0 [ 23.847802] print_report+0xcc/0x620 [ 23.848108] ? __virt_addr_valid+0x102/0x340 [ 23.848458] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.848843] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.849235] kasan_report+0xbe/0xf0 [ 23.849613] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.850100] vma_interval_tree_remove+0xc75/0xec0 [ 23.850480] vma_prepare+0xc54/0x11a0 [ 23.850781] __split_vma+0x5af/0x950 [ 23.851071] ? __pfx___split_vma+0x10/0x10 [ 23.851402] ? find_held_lock+0x2c/0x110 [ 23.851724] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.852102] ? lock_is_held_type+0x9f/0x120 [ 23.852440] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.852834] ? mtree_range_walk+0x632/0x900 [ 23.853182] ? mas_walk+0x5c7/0x7c0 [ 23.853485] do_vmi_munmap+0x1f1/0x2b0 [ 23.853803] mmap_region+0x1f9/0x2660 [ 23.854117] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.854436] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.854889] ? __pfx_lock_acquire+0x10/0x10 [ 23.855225] ? __pfx_mmap_region+0x10/0x10 [ 23.855554] ? security_mmap_addr+0x7d/0xa0 [ 23.855892] ? get_unmapped_area+0x1f5/0x3f0 [ 23.856243] do_mmap+0x854/0xf00 [ 23.856513] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.856829] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.857176] ksys_mmap_pgoff+0x3af/0x500 [ 23.857496] do_syscall_64+0x3f/0x90 [ 23.857800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.858204] RIP: 0033:0x7f8fba4abd82 [ 23.858497] 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 [ 23.859846] RSP: 002b:00007fffc07bb4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.860434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fba4abd82 [ 23.860975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fb98e5000 [ 23.861511] RBP: 00007f8fb98e5000 R08: 0000000000000009 R09: 0000000000001000 [ 23.862057] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb4d3d3ec0 [ 23.862601] R13: 00007fffc07bb4e0 R14: 00007fffc07bb510 R15: 00007fffc07bb870 [ 23.863137] [ 23.863318] [ 23.863451] Allocated by task 211: [ 23.863728] kasan_save_stack+0x22/0x50 [ 23.864052] kasan_set_track+0x25/0x30 [ 23.864358] __kasan_slab_alloc+0x59/0x70 [ 23.864694] kmem_cache_alloc+0x16b/0x370 [ 23.865029] vm_area_dup+0x20/0x160 [ 23.865316] __split_vma+0x170/0x950 [ 23.865620] split_vma+0xc6/0x110 [ 23.865905] mprotect_fixup+0x8d2/0xb30 [ 23.866223] do_mprotect_pkey+0x87e/0xd40 [ 23.866554] __x64_sys_mprotect+0x78/0xc0 [ 23.866883] do_syscall_64+0x3f/0x90 [ 23.867184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.867582] [ 23.867714] Freed by task 0: [ 23.867954] kasan_save_stack+0x22/0x50 [ 23.868281] kasan_set_track+0x25/0x30 [ 23.868596] kasan_save_free_info+0x2b/0x50 [ 23.868929] __kasan_slab_free+0x10a/0x190 [ 23.869264] kmem_cache_free+0x10d/0x4d0 [ 23.869579] rcu_core+0x8c8/0x2860 [ 23.869872] __do_softirq+0x1b7/0x7d4 [ 23.870173] [ 23.870311] Last potentially related work creation: [ 23.870681] kasan_save_stack+0x22/0x50 [ 23.871003] __kasan_record_aux_stack+0x8e/0xa0 [ 23.871369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.871782] remove_vma+0x139/0x170 [ 23.872065] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.872423] do_vmi_munmap+0x1f1/0x2b0 [ 23.872728] __vm_munmap+0x138/0x3a0 [ 23.873032] __x64_sys_munmap+0x59/0x80 [ 23.873344] do_syscall_64+0x3f/0x90 [ 23.873647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.874057] [ 23.874195] The buggy address belongs to the object at ffff888019df0570 [ 23.874195] which belongs to the cache vm_area_struct of size 168 [ 23.875129] The buggy address is located 88 bytes inside of [ 23.875129] freed 168-byte region [ffff888019df0570, ffff888019df0618) [ 23.876039] [ 23.876178] The buggy address belongs to the physical page: [ 23.876592] page:00000000c0aac616 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19df0 [ 23.877300] memcg:ffff888019ded101 [ 23.877567] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.878000] page_type: 0xffffffff() [ 23.878289] raw: 0100000000000200 ffff88800879fc80 ffffea00006779c0 0000000000000002 [ 23.878866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ded101 [ 23.879443] page dumped because: kasan: bad access detected [ 23.879856] [ 23.879990] Memory state around the buggy address: [ 23.880359] ffff888019df0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.880906] ffff888019df0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 23.881446] >ffff888019df0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.881996] ^ [ 23.882426] ffff888019df0600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 23.882964] ffff888019df0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.883504] ================================================================== [ 23.884096] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.235517] BUG: Bad rss-counter state mm:0000000040cf2747 type:MM_FILEPAGES val:33 [ 26.236511] BUG: Bad rss-counter state mm:0000000040cf2747 type:MM_ANONPAGES val:22 [ 26.609540] BUG: Bad rss-counter state mm:000000008cb161d7 type:MM_FILEPAGES val:33 [ 26.610908] BUG: Bad rss-counter state mm:000000008cb161d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59585' (ECDSA) to the list of known hosts. 2023/06/19 18:48:51 fuzzer started 2023/06/19 18:48:51 dialing manager at localhost:44161 2023/06/19 18:48:51 checking machine... 2023/06/19 18:48:51 checking revisions... [ 27.331813] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:48:52 testing simple program... [ 27.380797] cgroup: Unknown subsys name 'net' [ 27.422940] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:48:51 Registers: info registers vcpu 0 RAX=1ffffffff0a59045 RBX=ffffffff852c8210 RCX=0000000000000000 RDX=ffff888014648000 RSI=ffffffff81ef55ff RDI=ffffffff852c8228 RBP=dffffc0000000000 RSP=ffff88800f5ffde0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000010 R11=0000000000000000 R12=0000000000000003 R13=0000000000000009 R14=0000000000000003 R15=0000000000000010 RIP=ffffffff81ef560e 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 00007fea6346f900 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=00007fea63a270b0 CR3=0000000019c2e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8180c8d9 RDX=dffffc0000000000 RSI=ffffffff8180c8da RDI=ffff888008e57978 RBP=ffff888008e579d0 RSP=ffff888008e57908 R8 =ffffffff86137dd6 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020f00 R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e579b9 R15=ffff888008e57978 RIP=ffffffff81130719 RFL=00000282 [--S----] 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 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=00007fa275a1b2f0 CR3=0000000018dc6000 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=2031353a38343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a38343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000