[ 23.923080] BUG: Bad rss-counter state mm:00000000e7385cb6 type:MM_FILEPAGES val:33 [ 23.924515] BUG: Bad rss-counter state mm:00000000e7385cb6 type:MM_ANONPAGES val:22 [ 24.049803] ================================================================== [ 24.050902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.052161] Read of size 8 at addr ffff88801b895880 by task sshd/219 [ 24.052992] [ 24.053212] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.054099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.055085] Call Trace: [ 24.055408] [ 24.055696] dump_stack_lvl+0x91/0xf0 [ 24.056187] print_report+0xcc/0x620 [ 24.056673] ? __virt_addr_valid+0x102/0x340 [ 24.057226] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.057843] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.058464] kasan_report+0xbe/0xf0 [ 24.058947] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.059572] vma_interval_tree_remove+0xc75/0xec0 [ 24.060181] vma_prepare+0xc54/0x11a0 [ 24.060672] __split_vma+0x5af/0x950 [ 24.061162] ? __pfx___split_vma+0x10/0x10 [ 24.061732] ? find_held_lock+0x2c/0x110 [ 24.062277] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.062873] ? lock_is_held_type+0x9f/0x120 [ 24.063418] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.064031] ? mtree_range_walk+0x632/0x900 [ 24.064588] ? mas_walk+0x5c7/0x7c0 [ 24.065064] do_vmi_munmap+0x1f1/0x2b0 [ 24.065557] mmap_region+0x1f9/0x2660 [ 24.066037] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.066550] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.067274] ? __pfx_lock_acquire+0x10/0x10 [ 24.067817] ? __pfx_mmap_region+0x10/0x10 [ 24.068349] ? security_mmap_addr+0x7d/0xa0 [ 24.068883] ? get_unmapped_area+0x1f5/0x3f0 [ 24.069435] do_mmap+0x854/0xf00 [ 24.069874] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.070375] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.070973] ksys_mmap_pgoff+0x3af/0x500 [ 24.071486] do_syscall_64+0x3f/0x90 [ 24.071967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.072624] RIP: 0033:0x7f2ccca16d82 [ 24.073094] 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 [ 24.075258] RSP: 002b:00007ffe522e2978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.076165] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ccca16d82 [ 24.077020] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ccbe50000 [ 24.077883] RBP: 00007f2ccbe50000 R08: 0000000000000009 R09: 0000000000001000 [ 24.078736] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608ea240f70 [ 24.079596] R13: 00007ffe522e2990 R14: 00007ffe522e29c0 R15: 00007ffe522e2d20 [ 24.080477] [ 24.080778] [ 24.080999] Allocated by task 211: [ 24.081443] kasan_save_stack+0x22/0x50 [ 24.081948] kasan_set_track+0x25/0x30 [ 24.082446] __kasan_slab_alloc+0x59/0x70 [ 24.082990] kmem_cache_alloc+0x16b/0x370 [ 24.083509] vm_area_dup+0x20/0x160 [ 24.083968] __split_vma+0x170/0x950 [ 24.084438] split_vma+0xc6/0x110 [ 24.084880] mprotect_fixup+0x8d2/0xb30 [ 24.085387] do_mprotect_pkey+0x87e/0xd40 [ 24.085904] __x64_sys_mprotect+0x78/0xc0 [ 24.086424] do_syscall_64+0x3f/0x90 [ 24.086909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.087555] [ 24.087770] Freed by task 13: [ 24.088154] kasan_save_stack+0x22/0x50 [ 24.088657] kasan_set_track+0x25/0x30 [ 24.089146] kasan_save_free_info+0x2b/0x50 [ 24.089673] __kasan_slab_free+0x10a/0x190 [ 24.090212] kmem_cache_free+0x10d/0x4d0 [ 24.090725] rcu_core+0x8c8/0x2860 [ 24.091198] __do_softirq+0x1b7/0x7d4 [ 24.091681] [ 24.091903] Last potentially related work creation: [ 24.092491] kasan_save_stack+0x22/0x50 [ 24.093052] __kasan_record_aux_stack+0x8e/0xa0 [ 24.093633] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.094275] remove_vma+0x139/0x170 [ 24.094733] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.095306] do_vmi_munmap+0x1f1/0x2b0 [ 24.095788] __vm_munmap+0x138/0x3a0 [ 24.096264] __x64_sys_munmap+0x59/0x80 [ 24.096776] do_syscall_64+0x3f/0x90 [ 24.097266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.097911] [ 24.098128] The buggy address belongs to the object at ffff88801b895828 [ 24.098128] which belongs to the cache vm_area_struct of size 168 [ 24.099604] The buggy address is located 88 bytes inside of [ 24.099604] freed 168-byte region [ffff88801b895828, ffff88801b8958d0) [ 24.101010] [ 24.101225] The buggy address belongs to the physical page: [ 24.101890] page:00000000a94239cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b895 [ 24.102998] memcg:ffff88801b863a01 [ 24.103426] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.104077] page_type: 0xffffffff() [ 24.104531] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.105461] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b863a01 [ 24.106378] page dumped because: kasan: bad access detected [ 24.107055] [ 24.107273] Memory state around the buggy address: [ 24.107863] ffff88801b895780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.108722] ffff88801b895800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.109577] >ffff88801b895880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.110436] ^ [ 24.110855] ffff88801b895900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.111723] ffff88801b895980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 24.112571] ================================================================== [ 24.113517] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.192283] BUG: Bad rss-counter state mm:00000000dbff45d8 type:MM_FILEPAGES val:33 [ 26.193507] BUG: Bad rss-counter state mm:00000000dbff45d8 type:MM_ANONPAGES val:22 [ 26.560186] BUG: Bad rss-counter state mm:0000000034b294fd type:MM_FILEPAGES val:33 [ 26.561240] BUG: Bad rss-counter state mm:0000000034b294fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47045' (ECDSA) to the list of known hosts. 2023/06/20 13:25:23 fuzzer started 2023/06/20 13:25:23 dialing manager at localhost:36067 2023/06/20 13:25:23 checking machine... 2023/06/20 13:25:23 checking revisions... [ 27.282957] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:25:23 testing simple program... [ 27.338782] cgroup: Unknown subsys name 'net' [ 27.443357] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:25:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=1ffff11003256fcf RDX=1ffff11002dcecce RSI=ffffffff811fc5b3 RDI=ffff888016e76670 RBP=ffff888016e751c0 RSP=ffff8880192b7ed8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=dffffc0000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8209a201 RFL=00000286 [--S--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 00007f9f6e80d700 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=00007f7c375555b0 CR3=000000000e6f4000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38353139342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383531 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffed100394de85 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801ca6f418 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000088700000887 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d9039 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 00007f7ce07e1900 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=00007f7ce0d98618 CR3=000000000e40e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000