[ 24.003118] BUG: Bad rss-counter state mm:00000000423a8527 type:MM_FILEPAGES val:33 [ 24.004277] BUG: Bad rss-counter state mm:00000000423a8527 type:MM_ANONPAGES val:22 [ 24.037818] ================================================================== [ 24.038853] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.039914] Read of size 8 at addr ffff88800d924140 by task sshd/219 [ 24.040906] [ 24.041204] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.042097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.043094] Call Trace: [ 24.043419] [ 24.043713] dump_stack_lvl+0x91/0xf0 [ 24.044210] print_report+0xcc/0x620 [ 24.044708] ? __virt_addr_valid+0x102/0x340 [ 24.045300] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.045918] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.046541] kasan_report+0xbe/0xf0 [ 24.047014] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.047638] vma_interval_tree_remove+0xc75/0xec0 [ 24.048250] vma_prepare+0xc54/0x11a0 [ 24.048744] __split_vma+0x5af/0x950 [ 24.049230] ? __pfx___split_vma+0x10/0x10 [ 24.049962] ? find_held_lock+0x2c/0x110 [ 24.050490] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.051058] ? lock_is_held_type+0x9f/0x120 [ 24.051596] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.052225] ? mtree_range_walk+0x632/0x900 [ 24.052793] ? mas_walk+0x5c7/0x7c0 [ 24.053270] do_vmi_munmap+0x1f1/0x2b0 [ 24.053763] mmap_region+0x1f9/0x2660 [ 24.054249] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.054769] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.055490] ? __pfx_lock_acquire+0x10/0x10 [ 24.056026] ? __pfx_mmap_region+0x10/0x10 [ 24.056564] ? security_mmap_addr+0x7d/0xa0 [ 24.057120] ? get_unmapped_area+0x1f5/0x3f0 [ 24.057675] do_mmap+0x854/0xf00 [ 24.058115] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.058612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.059181] ksys_mmap_pgoff+0x3af/0x500 [ 24.059692] do_syscall_64+0x3f/0x90 [ 24.060178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.060839] RIP: 0033:0x7fdac2abad82 [ 24.061302] 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 [ 24.063571] RSP: 002b:00007ffeb1102558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.064517] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdac2abad82 [ 24.065398] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdac1ef4000 [ 24.066253] RBP: 00007fdac1ef4000 R08: 0000000000000009 R09: 0000000000001000 [ 24.067101] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a29ca8d90 [ 24.067941] R13: 00007ffeb1102570 R14: 00007ffeb11025a0 R15: 00007ffeb1102900 [ 24.068818] [ 24.069111] [ 24.069329] Allocated by task 212: [ 24.069766] kasan_save_stack+0x22/0x50 [ 24.070278] kasan_set_track+0x25/0x30 [ 24.070784] __kasan_slab_alloc+0x59/0x70 [ 24.071315] kmem_cache_alloc+0x16b/0x370 [ 24.071852] vm_area_dup+0x20/0x160 [ 24.072308] __split_vma+0x170/0x950 [ 24.072788] split_vma+0xc6/0x110 [ 24.073236] mprotect_fixup+0x8d2/0xb30 [ 24.073748] do_mprotect_pkey+0x87e/0xd40 [ 24.074280] __x64_sys_mprotect+0x78/0xc0 [ 24.074805] do_syscall_64+0x3f/0x90 [ 24.075288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.075940] [ 24.076158] Freed by task 212: [ 24.076555] kasan_save_stack+0x22/0x50 [ 24.077089] kasan_set_track+0x25/0x30 [ 24.077585] kasan_save_free_info+0x2b/0x50 [ 24.078127] __kasan_slab_free+0x10a/0x190 [ 24.078664] kmem_cache_free+0x10d/0x4d0 [ 24.079170] rcu_core+0x8c8/0x2860 [ 24.079618] __do_softirq+0x1b7/0x7d4 [ 24.080093] [ 24.080308] Last potentially related work creation: [ 24.080906] kasan_save_stack+0x22/0x50 [ 24.081413] __kasan_record_aux_stack+0x8e/0xa0 [ 24.081984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.082628] remove_vma+0x139/0x170 [ 24.083082] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.083645] do_vmi_munmap+0x1f1/0x2b0 [ 24.084137] __vm_munmap+0x138/0x3a0 [ 24.084608] __x64_sys_munmap+0x59/0x80 [ 24.085118] do_syscall_64+0x3f/0x90 [ 24.085689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.086451] [ 24.086672] The buggy address belongs to the object at ffff88800d9240e8 [ 24.086672] which belongs to the cache vm_area_struct of size 168 [ 24.088166] The buggy address is located 88 bytes inside of [ 24.088166] freed 168-byte region [ffff88800d9240e8, ffff88800d924190) [ 24.089641] [ 24.089860] The buggy address belongs to the physical page: [ 24.090739] page:000000000019c90f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd924 [ 24.092234] memcg:ffff88800f109801 [ 24.092834] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.093784] page_type: 0xffffffff() [ 24.094398] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.095528] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f109801 [ 24.096466] page dumped because: kasan: bad access detected [ 24.097253] [ 24.097547] Memory state around the buggy address: [ 24.098339] ffff88800d924000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.099513] ffff88800d924080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 24.100699] >ffff88800d924100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.101877] ^ [ 24.102745] ffff88800d924180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 24.103929] ffff88800d924200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.105119] ================================================================== [ 24.106715] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.115242] BUG: Bad rss-counter state mm:000000006ab31b54 type:MM_FILEPAGES val:33 [ 26.116909] BUG: Bad rss-counter state mm:000000006ab31b54 type:MM_ANONPAGES val:22 [ 26.608531] BUG: Bad rss-counter state mm:0000000023e64dd8 type:MM_FILEPAGES val:33 [ 26.609812] BUG: Bad rss-counter state mm:0000000023e64dd8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36717' (ECDSA) to the list of known hosts. 2023/06/21 06:53:17 fuzzer started 2023/06/21 06:53:17 dialing manager at localhost:36067 2023/06/21 06:53:17 checking machine... 2023/06/21 06:53:17 checking revisions... [ 27.333310] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:53:17 testing simple program... [ 27.391658] cgroup: Unknown subsys name 'net' [ 27.441777] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:53:17 Registers: info registers vcpu 0 RAX=ffff88800e735db0 RBX=0000000000000255 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8113b871 RDI=ffff88800e735db0 RBP=ffff888006a77f58 RSP=ffff888006a77eb8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000007 R13=00007f35a6d42b30 R14=0000000000000000 R15=ffff88800e735c80 RIP=ffffffff812bc5a4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f35a78b4900 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=00007f35a6d42b30 CR3=000000000cc7e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=79a866fd8f84b31900000000000ae988 XMM05=eecd091b7bd55e930000000000132018 XMM06=806171799158d96700000000001307c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009ba3420 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff83149a2d RDI=ffff888009ba60b1 RBP=ffffffff85a63e20 RSP=ffff888016b1fad8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888016b1fb38 R14=0000000000000000 R15=00000000000000e4 RIP=ffffffff83149a46 RFL=00000202 [-------] 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 00007fbf48af8900 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=00007fbf490af618 CR3=000000001bc46000 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=563412feff00545000000000000080fe 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