[ 55.706618] BUG: Bad rss-counter state mm:000000003fc5c27b type:MM_FILEPAGES val:33 [ 55.707864] BUG: Bad rss-counter state mm:000000003fc5c27b type:MM_ANONPAGES val:22 [ 55.744035] ================================================================== [ 55.744988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.745920] Read of size 8 at addr ffff888019a46880 by task sshd/226 [ 55.746774] [ 55.746991] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 55.747863] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.748849] Call Trace: [ 55.749172] [ 55.749453] dump_stack_lvl+0x91/0xf0 [ 55.749946] print_report+0xcc/0x620 [ 55.750444] ? __virt_addr_valid+0x102/0x340 [ 55.750993] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.751615] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.752243] kasan_report+0xbe/0xf0 [ 55.752714] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.753326] vma_interval_tree_remove+0xc75/0xec0 [ 55.753930] vma_prepare+0xc54/0x11a0 [ 55.754407] __split_vma+0x5af/0x950 [ 55.754879] ? __pfx___split_vma+0x10/0x10 [ 55.755425] ? find_held_lock+0x2c/0x110 [ 55.755944] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.756500] ? lock_is_held_type+0x9f/0x120 [ 55.757037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.757645] ? mtree_range_walk+0x632/0x900 [ 55.758202] ? mas_walk+0x5c7/0x7c0 [ 55.758683] do_vmi_munmap+0x1f1/0x2b0 [ 55.759194] mmap_region+0x1f9/0x2660 [ 55.759676] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.760189] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.760894] ? __pfx_lock_acquire+0x10/0x10 [ 55.761433] ? __pfx_mmap_region+0x10/0x10 [ 55.761961] ? security_mmap_addr+0x7d/0xa0 [ 55.762485] ? get_unmapped_area+0x1f5/0x3f0 [ 55.763032] do_mmap+0x854/0xf00 [ 55.763470] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.763966] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.764520] ksys_mmap_pgoff+0x3af/0x500 [ 55.765023] do_syscall_64+0x3f/0x90 [ 55.765497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.766142] RIP: 0033:0x7f57546c3d82 [ 55.766600] 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 [ 55.768730] RSP: 002b:00007ffe3d2f6aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.769639] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57546c3d82 [ 55.770483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5753afd000 [ 55.771338] RBP: 00007f5753afd000 R08: 0000000000000009 R09: 0000000000001000 [ 55.772181] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653c0d1eec0 [ 55.773037] R13: 00007ffe3d2f6ac0 R14: 00007ffe3d2f6af0 R15: 00007ffe3d2f6e50 [ 55.773904] [ 55.774202] [ 55.774417] Allocated by task 219: [ 55.774848] kasan_save_stack+0x22/0x50 [ 55.775377] kasan_set_track+0x25/0x30 [ 55.775879] __kasan_slab_alloc+0x59/0x70 [ 55.776409] kmem_cache_alloc+0x16b/0x370 [ 55.776930] vm_area_dup+0x20/0x160 [ 55.777393] __split_vma+0x170/0x950 [ 55.777857] split_vma+0xc6/0x110 [ 55.778305] mprotect_fixup+0x8d2/0xb30 [ 55.778800] do_mprotect_pkey+0x87e/0xd40 [ 55.779322] __x64_sys_mprotect+0x78/0xc0 [ 55.779842] do_syscall_64+0x3f/0x90 [ 55.780311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.780949] [ 55.781162] Freed by task 219: [ 55.781550] kasan_save_stack+0x22/0x50 [ 55.782053] kasan_set_track+0x25/0x30 [ 55.782545] kasan_save_free_info+0x2b/0x50 [ 55.783088] __kasan_slab_free+0x10a/0x190 [ 55.783617] kmem_cache_free+0x10d/0x4d0 [ 55.784122] rcu_core+0x8c8/0x2860 [ 55.784568] __do_softirq+0x1b7/0x7d4 [ 55.785041] [ 55.785256] Last potentially related work creation: [ 55.785831] kasan_save_stack+0x22/0x50 [ 55.786334] __kasan_record_aux_stack+0x8e/0xa0 [ 55.786903] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.787560] remove_vma+0x139/0x170 [ 55.788007] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.788562] do_vmi_munmap+0x1f1/0x2b0 [ 55.789045] __vm_munmap+0x138/0x3a0 [ 55.789505] __x64_sys_munmap+0x59/0x80 [ 55.790000] do_syscall_64+0x3f/0x90 [ 55.790472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.791114] [ 55.791328] The buggy address belongs to the object at ffff888019a46828 [ 55.791328] which belongs to the cache vm_area_struct of size 168 [ 55.792784] The buggy address is located 88 bytes inside of [ 55.792784] freed 168-byte region [ffff888019a46828, ffff888019a468d0) [ 55.794177] [ 55.794393] The buggy address belongs to the physical page: [ 55.795060] page:000000008ef16aea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a46 [ 55.796147] memcg:ffff888019a47001 [ 55.796578] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.797218] page_type: 0xffffffff() [ 55.797670] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 55.798577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a47001 [ 55.799487] page dumped because: kasan: bad access detected [ 55.800145] [ 55.800361] Memory state around the buggy address: [ 55.800938] ffff888019a46780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 55.801786] ffff888019a46800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 55.802664] >ffff888019a46880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 55.803570] ^ [ 55.803989] ffff888019a46900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.804865] ffff888019a46980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 55.805735] ================================================================== [ 55.806792] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 58.788867] BUG: Bad rss-counter state mm:0000000095579c33 type:MM_FILEPAGES val:33 [ 58.789840] BUG: Bad rss-counter state mm:0000000095579c33 type:MM_ANONPAGES val:22 [ 59.348613] BUG: Bad rss-counter state mm:00000000328408ca type:MM_FILEPAGES val:33 [ 59.349654] BUG: Bad rss-counter state mm:00000000328408ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8337' (ECDSA) to the list of known hosts. 2023/06/20 19:47:13 fuzzer started 2023/06/20 19:47:13 dialing manager at localhost:36067 2023/06/20 19:47:13 checking machine... 2023/06/20 19:47:13 checking revisions... [ 60.065526] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:47:13 testing simple program... [ 60.114004] cgroup: Unknown subsys name 'net' [ 60.150210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:47:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864ec930 RBP=ffff888008d9f9a8 RSP=ffff888008d9f890 R8 =0000000000000000 R9 =ffff888008d9f990 R10=0000000000038001 R11=0000000000006097 R12=ffff888008d9f9b0 R13=ffff888008d9f998 R14=ffff888008d9f991 R15=ffff888008d9f950 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 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=00007f0650c9b0b0 CR3=0000000019926000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000f08 RBX=ffff88800c6e0000 RCX=0000000000000000 RDX=1ffff11001b82440 RSI=ffffffff83c56fac RDI=ffff88800dc12208 RBP=ffff88800c6e0ec0 RSP=ffff88801980f4a8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000064900000649 R12=ffff88800dc12140 R13=0000000000000000 R14=0000000000000000 R15=00000000fffbaafe RIP=ffffffff83c57002 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 00007f06506e3900 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=00007f0650c9a618 CR3=0000000019926000 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