[ 31.388517] BUG: Bad rss-counter state mm:00000000cac5a312 type:MM_FILEPAGES val:33 [ 31.389768] BUG: Bad rss-counter state mm:00000000cac5a312 type:MM_ANONPAGES val:22 [ 31.427844] ================================================================== [ 31.428822] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.429876] Read of size 8 at addr ffff888015800d08 by task sshd/219 [ 31.430672] [ 31.430896] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.431797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.432801] Call Trace: [ 31.433129] [ 31.433449] dump_stack_lvl+0x91/0xf0 [ 31.433942] print_report+0xcc/0x620 [ 31.434453] ? __virt_addr_valid+0x102/0x340 [ 31.435012] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.435646] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.436285] kasan_report+0xbe/0xf0 [ 31.436794] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.437438] vma_interval_tree_remove+0xc75/0xec0 [ 31.438047] vma_prepare+0xc54/0x11a0 [ 31.438562] __split_vma+0x5af/0x950 [ 31.439041] ? __pfx___split_vma+0x10/0x10 [ 31.439589] ? find_held_lock+0x2c/0x110 [ 31.440120] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.440718] ? lock_is_held_type+0x9f/0x120 [ 31.441274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.441901] ? mtree_range_walk+0x632/0x900 [ 31.442483] ? mas_walk+0x5c7/0x7c0 [ 31.442960] do_vmi_munmap+0x1f1/0x2b0 [ 31.443475] mmap_region+0x1f9/0x2660 [ 31.443973] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.444503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.445265] ? __pfx_lock_acquire+0x10/0x10 [ 31.445798] ? __pfx_mmap_region+0x10/0x10 [ 31.446341] ? security_mmap_addr+0x7d/0xa0 [ 31.446883] ? get_unmapped_area+0x1f5/0x3f0 [ 31.447474] do_mmap+0x854/0xf00 [ 31.447917] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.448432] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.449026] ksys_mmap_pgoff+0x3af/0x500 [ 31.449551] do_syscall_64+0x3f/0x90 [ 31.450029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.450698] RIP: 0033:0x7f5c94a4ed82 [ 31.451158] 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 [ 31.453368] RSP: 002b:00007ffd93716218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.454305] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c94a4ed82 [ 31.455160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c93e88000 [ 31.456036] RBP: 00007f5c93e88000 R08: 0000000000000009 R09: 0000000000001000 [ 31.456932] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffd51c5980 [ 31.457805] R13: 00007ffd93716230 R14: 00007ffd93716260 R15: 00007ffd937165c0 [ 31.458681] [ 31.458986] [ 31.459216] Allocated by task 212: [ 31.459661] kasan_save_stack+0x22/0x50 [ 31.460185] kasan_set_track+0x25/0x30 [ 31.460732] __kasan_slab_alloc+0x59/0x70 [ 31.461289] kmem_cache_alloc+0x16b/0x370 [ 31.461816] vm_area_dup+0x20/0x160 [ 31.462298] __split_vma+0x170/0x950 [ 31.462772] split_vma+0xc6/0x110 [ 31.463224] mprotect_fixup+0x8d2/0xb30 [ 31.463739] do_mprotect_pkey+0x87e/0xd40 [ 31.464276] __x64_sys_mprotect+0x78/0xc0 [ 31.464824] do_syscall_64+0x3f/0x90 [ 31.465332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.465978] [ 31.466193] Freed by task 212: [ 31.466597] kasan_save_stack+0x22/0x50 [ 31.467108] kasan_set_track+0x25/0x30 [ 31.467622] kasan_save_free_info+0x2b/0x50 [ 31.468155] __kasan_slab_free+0x10a/0x190 [ 31.468711] kmem_cache_free+0x10d/0x4d0 [ 31.469239] rcu_core+0x8c8/0x2860 [ 31.469711] __do_softirq+0x1b7/0x7d4 [ 31.470187] [ 31.470421] Last potentially related work creation: [ 31.471007] kasan_save_stack+0x22/0x50 [ 31.471531] __kasan_record_aux_stack+0x8e/0xa0 [ 31.472109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.472796] remove_vma+0x139/0x170 [ 31.473269] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.473851] do_vmi_munmap+0x1f1/0x2b0 [ 31.474358] __vm_munmap+0x138/0x3a0 [ 31.474826] __x64_sys_munmap+0x59/0x80 [ 31.475334] do_syscall_64+0x3f/0x90 [ 31.475812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.476468] [ 31.476702] Second to last potentially related work creation: [ 31.477426] kasan_save_stack+0x22/0x50 [ 31.477939] __kasan_record_aux_stack+0x8e/0xa0 [ 31.478535] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.479180] remove_vma+0x139/0x170 [ 31.479647] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.480207] do_vmi_munmap+0x1f1/0x2b0 [ 31.480729] mmap_region+0x1f9/0x2660 [ 31.481207] do_mmap+0x854/0xf00 [ 31.481671] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.482161] ksys_mmap_pgoff+0x3af/0x500 [ 31.482680] do_syscall_64+0x3f/0x90 [ 31.483159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.483818] [ 31.484036] The buggy address belongs to the object at ffff888015800cb0 [ 31.484036] which belongs to the cache vm_area_struct of size 168 [ 31.485564] The buggy address is located 88 bytes inside of [ 31.485564] freed 168-byte region [ffff888015800cb0, ffff888015800d58) [ 31.487002] [ 31.487273] The buggy address belongs to the physical page: [ 31.488157] page:0000000066657d07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15800 [ 31.489595] memcg:ffff8880199a7801 [ 31.490153] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.490994] page_type: 0xffffffff() [ 31.491586] raw: 0100000000000200 ffff88800879fc80 ffffea000056fb40 dead000000000008 [ 31.492762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199a7801 [ 31.493840] page dumped because: kasan: bad access detected [ 31.494639] [ 31.494858] Memory state around the buggy address: [ 31.495466] ffff888015800c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.496360] ffff888015800c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.497260] >ffff888015800d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.498115] ^ [ 31.498576] ffff888015800d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.499442] ffff888015800e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.500330] ================================================================== [ 31.501384] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.403467] BUG: Bad rss-counter state mm:000000006bee1250 type:MM_FILEPAGES val:33 [ 33.404692] BUG: Bad rss-counter state mm:000000006bee1250 type:MM_ANONPAGES val:22 [ 33.805047] BUG: Bad rss-counter state mm:000000002a4ab3d4 type:MM_FILEPAGES val:33 [ 33.806390] BUG: Bad rss-counter state mm:000000002a4ab3d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24383' (ECDSA) to the list of known hosts. 2023/06/20 10:36:35 fuzzer started 2023/06/20 10:36:35 dialing manager at localhost:44161 2023/06/20 10:36:35 checking machine... 2023/06/20 10:36:35 checking revisions... [ 34.548097] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:36:35 testing simple program... [ 34.594417] cgroup: Unknown subsys name 'net' [ 34.634073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:36:34 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800e7e85f0 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806ce09d58 RBP=1ffff1100d9c13a7 RSP=ffff88806ce09d28 R8 =0000000000000001 R9 =ffffed1001cfd0be R10=ffff88800e7e85f3 R11=00000000000b6996 R12=ffff88800e7e85f8 R13=ffff88800e7e8600 R14=ffffffff818d9dc6 R15=ffff88800da16780 RIP=ffffffff8180eea7 RFL=00000002 [-------] 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 00007feb3e27b700 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=000055eca77f32a8 CR3=000000000de5c000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323238 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=1ffffffff0bc0471 RBX=ffffffff85e0238c RCX=ffffffff8185a003 RDX=0000000000000000 RSI=ffffffff8613fb48 RDI=ffffffff85e0237c RBP=ffffffff85e0237c RSP=ffff88800da9f5e0 R8 =ffffffff8613fb48 R9 =ffff88800da9f6d8 R10=0000000000038001 R11=00000000000223ea R12=ffffffff85e023a0 R13=ffffffff85e0237c R14=ffffffff85e0237c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fe70159e900 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=00007fe7009bf520 CR3=000000000c724000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=95ec126725fb20a300000000000ae988 XMM05=30066c6da72fa9ac00000000001363f8 XMM06=806171799158d9670000000000135128 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000