[ 60.895121] sshd (215) used greatest stack depth: 23992 bytes left [ 60.895966] BUG: Bad rss-counter state mm:000000000d50b0e9 type:MM_FILEPAGES val:33 [ 60.897108] BUG: Bad rss-counter state mm:000000000d50b0e9 type:MM_ANONPAGES val:22 [ 61.058461] ================================================================== [ 61.059518] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.060660] Read of size 8 at addr ffff88800dea5a50 by task sshd/228 [ 61.061589] [ 61.061811] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.062681] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.063699] Call Trace: [ 61.064019] [ 61.064304] dump_stack_lvl+0x91/0xf0 [ 61.064816] print_report+0xcc/0x620 [ 61.065310] ? __virt_addr_valid+0x102/0x340 [ 61.065863] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.066475] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.067097] kasan_report+0xbe/0xf0 [ 61.067574] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.068190] vma_interval_tree_remove+0xc75/0xec0 [ 61.068806] vma_prepare+0xc54/0x11a0 [ 61.069289] __split_vma+0x5af/0x950 [ 61.069768] ? __pfx___split_vma+0x10/0x10 [ 61.070304] ? find_held_lock+0x2c/0x110 [ 61.070845] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.071410] ? lock_is_held_type+0x9f/0x120 [ 61.071970] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.072618] ? mtree_range_walk+0x632/0x900 [ 61.073185] ? mas_walk+0x5c7/0x7c0 [ 61.073662] do_vmi_munmap+0x1f1/0x2b0 [ 61.074170] mmap_region+0x1f9/0x2660 [ 61.074660] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.075177] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.075898] ? __pfx_lock_acquire+0x10/0x10 [ 61.076449] ? __pfx_mmap_region+0x10/0x10 [ 61.076997] ? security_mmap_addr+0x7d/0xa0 [ 61.077527] ? get_unmapped_area+0x1f5/0x3f0 [ 61.078077] do_mmap+0x854/0xf00 [ 61.078513] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.079003] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.079565] ksys_mmap_pgoff+0x3af/0x500 [ 61.080074] do_syscall_64+0x3f/0x90 [ 61.080579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.081233] RIP: 0033:0x7fd3d2e9bd82 [ 61.081692] 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 [ 61.083815] RSP: 002b:00007ffe6df20de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.084753] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3d2e9bd82 [ 61.085603] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3d22d5000 [ 61.086463] RBP: 00007fd3d22d5000 R08: 0000000000000009 R09: 0000000000001000 [ 61.087320] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562dcc6c0f70 [ 61.088168] R13: 00007ffe6df20e00 R14: 00007ffe6df20e30 R15: 00007ffe6df21190 [ 61.089059] [ 61.089354] [ 61.089573] Allocated by task 215: [ 61.090008] kasan_save_stack+0x22/0x50 [ 61.090527] kasan_set_track+0x25/0x30 [ 61.091029] __kasan_slab_alloc+0x59/0x70 [ 61.091597] kmem_cache_alloc+0x16b/0x370 [ 61.092177] vm_area_dup+0x20/0x160 [ 61.092753] __split_vma+0x170/0x950 [ 61.093297] split_vma+0xc6/0x110 [ 61.093770] mprotect_fixup+0x8d2/0xb30 [ 61.094310] do_mprotect_pkey+0x87e/0xd40 [ 61.094875] __x64_sys_mprotect+0x78/0xc0 [ 61.095440] do_syscall_64+0x3f/0x90 [ 61.095959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.096683] [ 61.096921] Freed by task 215: [ 61.097348] kasan_save_stack+0x22/0x50 [ 61.097902] kasan_set_track+0x25/0x30 [ 61.098456] kasan_save_free_info+0x2b/0x50 [ 61.099048] __kasan_slab_free+0x10a/0x190 [ 61.099644] kmem_cache_free+0x10d/0x4d0 [ 61.100216] rcu_core+0x8c8/0x2860 [ 61.100727] __do_softirq+0x1b7/0x7d4 [ 61.101261] [ 61.101496] Last potentially related work creation: [ 61.102146] kasan_save_stack+0x22/0x50 [ 61.102697] __kasan_record_aux_stack+0x8e/0xa0 [ 61.103332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.104042] remove_vma+0x139/0x170 [ 61.104541] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.105173] do_vmi_munmap+0x1f1/0x2b0 [ 61.105718] __vm_munmap+0x138/0x3a0 [ 61.106234] __x64_sys_munmap+0x59/0x80 [ 61.106780] do_syscall_64+0x3f/0x90 [ 61.107299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.108012] [ 61.108249] The buggy address belongs to the object at ffff88800dea59f8 [ 61.108249] which belongs to the cache vm_area_struct of size 168 [ 61.109874] The buggy address is located 88 bytes inside of [ 61.109874] freed 168-byte region [ffff88800dea59f8, ffff88800dea5aa0) [ 61.111443] [ 61.111674] The buggy address belongs to the physical page: [ 61.112414] page:000000005c3b33ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdea5 [ 61.113610] memcg:ffff88800ef17201 [ 61.114083] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.114792] page_type: 0xffffffff() [ 61.115294] raw: 0100000000000200 ffff8880087a0c80 ffffea0000511e80 dead000000000004 [ 61.116320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef17201 [ 61.117358] page dumped because: kasan: bad access detected [ 61.118097] [ 61.118343] Memory state around the buggy address: [ 61.118983] ffff88800dea5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.119935] ffff88800dea5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 61.120902] >ffff88800dea5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.121851] ^ [ 61.122621] ffff88800dea5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 61.123570] ffff88800dea5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.124521] ================================================================== [ 61.125698] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.920948] BUG: Bad rss-counter state mm:000000007d43b238 type:MM_FILEPAGES val:33 [ 62.921745] BUG: Bad rss-counter state mm:000000007d43b238 type:MM_ANONPAGES val:22 [ 63.424682] BUG: Bad rss-counter state mm:00000000c9fc21cc type:MM_FILEPAGES val:33 [ 63.425868] BUG: Bad rss-counter state mm:00000000c9fc21cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35468' (ECDSA) to the list of known hosts. 2023/06/21 04:05:57 fuzzer started 2023/06/21 04:05:57 dialing manager at localhost:36067 2023/06/21 04:05:57 checking machine... 2023/06/21 04:05:57 checking revisions... [ 64.052376] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:05:57 testing simple program... [ 64.128250] cgroup: Unknown subsys name 'net' [ 64.180729] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:05:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffdb39712c8 CR3=0000000005482000 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=00007fedcd8e8510000055e05e721790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f9651c0 RCX=ffff88806cf09ab8 RDX=ffff88806cf09a98 RSI=ffff88800f9651c0 RDI=ffff88800f11f230 RBP=ffff88806cf09ab8 RSP=ffff88806cf099d0 R8 =ffffffff864b2f42 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09a98 R13=ffff88806cf02000 R14=ffff88800f11f238 R15=ffff88806cf09a98 RIP=ffffffff8108df8a RFL=00000286 [--S--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 00007f1795766900 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=00007f1795d1d618 CR3=000000000e790000 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