[ 30.571882] BUG: Bad rss-counter state mm:000000001c0b6fca type:MM_FILEPAGES val:33 [ 30.572902] BUG: Bad rss-counter state mm:000000001c0b6fca type:MM_ANONPAGES val:22 [ 30.743994] ================================================================== [ 30.744937] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.746009] Read of size 8 at addr ffff888018a54b38 by task sshd/219 [ 30.746813] [ 30.747034] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.747944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.748950] Call Trace: [ 30.749279] [ 30.749583] dump_stack_lvl+0x91/0xf0 [ 30.750084] print_report+0xcc/0x620 [ 30.750592] ? __virt_addr_valid+0x102/0x340 [ 30.751147] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751789] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.752412] kasan_report+0xbe/0xf0 [ 30.752955] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.753635] vma_interval_tree_remove+0xc75/0xec0 [ 30.754440] vma_prepare+0xc54/0x11a0 [ 30.754953] __split_vma+0x5af/0x950 [ 30.755434] ? __pfx___split_vma+0x10/0x10 [ 30.755986] ? find_held_lock+0x2c/0x110 [ 30.756533] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.757134] ? lock_is_held_type+0x9f/0x120 [ 30.757690] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.758298] ? mtree_range_walk+0x632/0x900 [ 30.758861] ? mas_walk+0x5c7/0x7c0 [ 30.759336] do_vmi_munmap+0x1f1/0x2b0 [ 30.759844] mmap_region+0x1f9/0x2660 [ 30.760329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.760877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.761618] ? __pfx_lock_acquire+0x10/0x10 [ 30.762154] ? __pfx_mmap_region+0x10/0x10 [ 30.762698] ? security_mmap_addr+0x7d/0xa0 [ 30.763238] ? get_unmapped_area+0x1f5/0x3f0 [ 30.763809] do_mmap+0x854/0xf00 [ 30.764265] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.764777] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.765376] ksys_mmap_pgoff+0x3af/0x500 [ 30.765939] do_syscall_64+0x3f/0x90 [ 30.766450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767151] RIP: 0033:0x7fc8f7f71d82 [ 30.767650] 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 [ 30.769972] RSP: 002b:00007fff0458d5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.770968] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8f7f71d82 [ 30.771894] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8f73ab000 [ 30.772808] RBP: 00007fc8f73ab000 R08: 0000000000000009 R09: 0000000000001000 [ 30.773750] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acb2410ec0 [ 30.774670] R13: 00007fff0458d5d0 R14: 00007fff0458d600 R15: 00007fff0458d960 [ 30.775607] [ 30.775922] [ 30.776149] Allocated by task 212: [ 30.776626] kasan_save_stack+0x22/0x50 [ 30.777180] kasan_set_track+0x25/0x30 [ 30.777725] __kasan_slab_alloc+0x59/0x70 [ 30.778283] kmem_cache_alloc+0x16b/0x370 [ 30.778865] vm_area_dup+0x20/0x160 [ 30.779356] __split_vma+0x170/0x950 [ 30.779859] split_vma+0xc6/0x110 [ 30.780331] mprotect_fixup+0x8d2/0xb30 [ 30.781056] do_mprotect_pkey+0x87e/0xd40 [ 30.781799] __x64_sys_mprotect+0x78/0xc0 [ 30.782491] do_syscall_64+0x3f/0x90 [ 30.783112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783974] [ 30.784265] Freed by task 212: [ 30.784795] kasan_save_stack+0x22/0x50 [ 30.785470] kasan_set_track+0x25/0x30 [ 30.786124] kasan_save_free_info+0x2b/0x50 [ 30.786840] __kasan_slab_free+0x10a/0x190 [ 30.787566] kmem_cache_free+0x10d/0x4d0 [ 30.788244] rcu_core+0x8c8/0x2860 [ 30.788876] __do_softirq+0x1b7/0x7d4 [ 30.789518] [ 30.789811] Last potentially related work creation: [ 30.790600] kasan_save_stack+0x22/0x50 [ 30.791277] __kasan_record_aux_stack+0x8e/0xa0 [ 30.792035] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.792916] remove_vma+0x139/0x170 [ 30.793530] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.794290] do_vmi_munmap+0x1f1/0x2b0 [ 30.794963] __vm_munmap+0x138/0x3a0 [ 30.795587] __x64_sys_munmap+0x59/0x80 [ 30.796237] do_syscall_64+0x3f/0x90 [ 30.796901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797809] [ 30.798110] Second to last potentially related work creation: [ 30.799027] kasan_save_stack+0x22/0x50 [ 30.799585] __kasan_record_aux_stack+0x8e/0xa0 [ 30.800197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.800911] remove_vma+0x139/0x170 [ 30.801399] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.802012] do_vmi_munmap+0x1f1/0x2b0 [ 30.802542] mmap_region+0x1f9/0x2660 [ 30.803055] do_mmap+0x854/0xf00 [ 30.803533] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.804053] ksys_mmap_pgoff+0x3af/0x500 [ 30.804604] do_syscall_64+0x3f/0x90 [ 30.805120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.805824] [ 30.806051] The buggy address belongs to the object at ffff888018a54ae0 [ 30.806051] which belongs to the cache vm_area_struct of size 168 [ 30.807647] The buggy address is located 88 bytes inside of [ 30.807647] freed 168-byte region [ffff888018a54ae0, ffff888018a54b88) [ 30.809196] [ 30.809428] The buggy address belongs to the physical page: [ 30.810152] page:0000000034f37d6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18a54 [ 30.811339] memcg:ffff8880179c1b01 [ 30.811806] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.812504] page_type: 0xffffffff() [ 30.813008] raw: 0100000000000200 ffff88800879fc80 ffffea0000629040 dead000000000004 [ 30.813999] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880179c1b01 [ 30.814988] page dumped because: kasan: bad access detected [ 30.815713] [ 30.815943] Memory state around the buggy address: [ 30.816569] ffff888018a54a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.817432] ffff888018a54a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.818250] >ffff888018a54b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.819090] ^ [ 30.819762] ffff888018a54b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.820678] ffff888018a54c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.821519] ================================================================== [ 30.822494] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.803893] BUG: Bad rss-counter state mm:000000001f310d02 type:MM_FILEPAGES val:33 [ 32.805377] BUG: Bad rss-counter state mm:000000001f310d02 type:MM_ANONPAGES val:22 [ 33.195012] BUG: Bad rss-counter state mm:00000000d28d0584 type:MM_FILEPAGES val:33 [ 33.196031] BUG: Bad rss-counter state mm:00000000d28d0584 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22975' (ECDSA) to the list of known hosts. 2023/06/20 04:50:01 fuzzer started 2023/06/20 04:50:01 dialing manager at localhost:44161 2023/06/20 04:50:01 checking machine... 2023/06/20 04:50:01 checking revisions... [ 33.944529] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:50:02 testing simple program... [ 33.995944] cgroup: Unknown subsys name 'net' [ 34.044406] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:50:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800885e800 RCX=0000000000000000 RDX=0000000000000002 RSI=0000000000000002 RDI=ffff88800c62a000 RBP=ffff88800c62a000 RSP=ffff888017a97848 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800885e7c0 R13=ffff88800c62a060 R14=0000000000000000 R15=ffff88800c62a274 RIP=ffffffff83c14762 RFL=00000293 [--S-A-C] 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 00007ff958bcb700 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=00007f4c20f7f618 CR3=000000000d7c0000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732031303a3035 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343430 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd9713fca60 CR3=000000000d8b2000 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=4ee9dbb9d9e865abfc4197c0d6f210d2 XMM02=000000000011ede8eff9b2d0a8fce9cb XMM03=000000000011eeb82c67c8bc2e329bc3 XMM04=7553468fa4e4bfd500000000000ae988 XMM05=dfcdbad4f1609c370000000000136098 XMM06=806171799158d9670000000000135f20 XMM07=e042d86d42eb936e00000000001256e8 XMM08=4f0c130ffbd2f72e000000000011eeb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000