[ 40.665514] BUG: Bad rss-counter state mm:000000001df99182 type:MM_FILEPAGES val:33 [ 40.666765] BUG: Bad rss-counter state mm:000000001df99182 type:MM_ANONPAGES val:22 [ 40.703567] ================================================================== [ 40.704512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.705497] Read of size 8 at addr ffff888009688b38 by task sshd/219 [ 40.706396] [ 40.706628] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.707548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.708583] Call Trace: [ 40.708917] [ 40.709216] dump_stack_lvl+0x91/0xf0 [ 40.709739] print_report+0xcc/0x620 [ 40.710252] ? __virt_addr_valid+0x102/0x340 [ 40.710840] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.711490] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.712158] kasan_report+0xbe/0xf0 [ 40.712655] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.713313] vma_interval_tree_remove+0xc75/0xec0 [ 40.713950] vma_prepare+0xc54/0x11a0 [ 40.714460] __split_vma+0x5af/0x950 [ 40.714955] ? __pfx___split_vma+0x10/0x10 [ 40.715537] ? find_held_lock+0x2c/0x110 [ 40.716093] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.716695] ? lock_is_held_type+0x9f/0x120 [ 40.717266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.717910] ? mtree_range_walk+0x632/0x900 [ 40.718495] ? mas_walk+0x5c7/0x7c0 [ 40.718992] do_vmi_munmap+0x1f1/0x2b0 [ 40.719511] mmap_region+0x1f9/0x2660 [ 40.720018] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.720549] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.721301] ? __pfx_lock_acquire+0x10/0x10 [ 40.721866] ? __pfx_mmap_region+0x10/0x10 [ 40.722433] ? security_mmap_addr+0x7d/0xa0 [ 40.722996] ? get_unmapped_area+0x1f5/0x3f0 [ 40.723586] do_mmap+0x854/0xf00 [ 40.724042] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.724564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.725157] ksys_mmap_pgoff+0x3af/0x500 [ 40.725694] do_syscall_64+0x3f/0x90 [ 40.726196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.726895] RIP: 0033:0x7f7e1d8d4d82 [ 40.727375] 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 [ 40.729651] RSP: 002b:00007ffcbdd82118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.730595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e1d8d4d82 [ 40.731486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e1cd0e000 [ 40.732392] RBP: 00007f7e1cd0e000 R08: 0000000000000009 R09: 0000000000001000 [ 40.733288] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4e32baec0 [ 40.734178] R13: 00007ffcbdd82130 R14: 00007ffcbdd82160 R15: 00007ffcbdd824c0 [ 40.735093] [ 40.735405] [ 40.735639] Allocated by task 211: [ 40.736089] kasan_save_stack+0x22/0x50 [ 40.736615] kasan_set_track+0x25/0x30 [ 40.737143] __kasan_slab_alloc+0x59/0x70 [ 40.737690] kmem_cache_alloc+0x16b/0x370 [ 40.738244] vm_area_dup+0x20/0x160 [ 40.738727] __split_vma+0x170/0x950 [ 40.739222] split_vma+0xc6/0x110 [ 40.739703] mprotect_fixup+0x8d2/0xb30 [ 40.740237] do_mprotect_pkey+0x87e/0xd40 [ 40.740783] __x64_sys_mprotect+0x78/0xc0 [ 40.741330] do_syscall_64+0x3f/0x90 [ 40.741835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.742510] [ 40.742736] Freed by task 211: [ 40.743159] kasan_save_stack+0x22/0x50 [ 40.743704] kasan_set_track+0x25/0x30 [ 40.744225] kasan_save_free_info+0x2b/0x50 [ 40.744790] __kasan_slab_free+0x10a/0x190 [ 40.745354] kmem_cache_free+0x10d/0x4d0 [ 40.745895] rcu_core+0x8c8/0x2860 [ 40.746364] __do_softirq+0x1b7/0x7d4 [ 40.746864] [ 40.747093] Last potentially related work creation: [ 40.747731] kasan_save_stack+0x22/0x50 [ 40.748261] __kasan_record_aux_stack+0x8e/0xa0 [ 40.748861] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.749537] remove_vma+0x139/0x170 [ 40.750017] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.750612] do_vmi_munmap+0x1f1/0x2b0 [ 40.751126] __vm_munmap+0x138/0x3a0 [ 40.751635] __x64_sys_munmap+0x59/0x80 [ 40.752152] do_syscall_64+0x3f/0x90 [ 40.752657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.753339] [ 40.753558] The buggy address belongs to the object at ffff888009688ae0 [ 40.753558] which belongs to the cache vm_area_struct of size 168 [ 40.755129] The buggy address is located 88 bytes inside of [ 40.755129] freed 168-byte region [ffff888009688ae0, ffff888009688b88) [ 40.756633] [ 40.756860] The buggy address belongs to the physical page: [ 40.757556] page:0000000075bf0ec9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9688 [ 40.758710] memcg:ffff8880131d0d01 [ 40.759159] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.759884] page_type: 0xffffffff() [ 40.760349] raw: 0100000000000200 ffff88800879fc80 ffffea000036cb40 dead000000000005 [ 40.761264] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880131d0d01 [ 40.762172] page dumped because: kasan: bad access detected [ 40.762824] [ 40.763041] Memory state around the buggy address: [ 40.763621] ffff888009688a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.764471] ffff888009688a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 40.765320] >ffff888009688b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.766164] ^ [ 40.766780] ffff888009688b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.767650] ffff888009688c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.768496] ================================================================== [ 40.769522] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.221334] BUG: Bad rss-counter state mm:000000005d7d51b6 type:MM_FILEPAGES val:33 [ 43.222443] BUG: Bad rss-counter state mm:000000005d7d51b6 type:MM_ANONPAGES val:22 [ 43.628046] BUG: Bad rss-counter state mm:00000000798be1da type:MM_FILEPAGES val:33 [ 43.628821] BUG: Bad rss-counter state mm:00000000798be1da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26389' (ECDSA) to the list of known hosts. 2023/06/20 00:45:52 fuzzer started 2023/06/20 00:45:52 dialing manager at localhost:44161 2023/06/20 00:45:52 checking machine... 2023/06/20 00:45:52 checking revisions... [ 44.331935] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:45:52 testing simple program... [ 44.369977] cgroup: Unknown subsys name 'net' [ 44.407259] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:45:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe8ebf8838 CR3=000000000c69e000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f44f0621c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=79732036373133343931203535373043 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000140 RBX=0000000000000000 RCX=000000000005f101 RDX=000000000005f0c1 RSI=0000000000082cc0 RDI=000000000005f0c1 RBP=ffff88800e8cfad8 RSP=ffff88800e8cfa90 R8 =0000000000042af0 R9 =fffffbfff0ba77da R10=0000000000000000 R11=ffff88800c6c1b00 R12=ffff888008fce280 R13=0000000000000000 R14=0000000000082cc0 R15=ffffffff83664a09 RIP=ffffffff81808200 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 00007fd8bb3d7900 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=00007ffe58443000 CR3=0000000019e9c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000