Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.247519] BUG: Bad rss-counter state mm:00000000209c2ab1 type:MM_FILEPAGES val:33 [ 32.249121] BUG: Bad rss-counter state mm:00000000209c2ab1 type:MM_ANONPAGES val:22 [ 32.415189] ================================================================== [ 32.416317] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.417398] Read of size 8 at addr ffff88800d54a058 by task sshd/218 [ 32.418345] [ 32.418563] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.419424] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.420418] Call Trace: [ 32.420740] [ 32.421024] dump_stack_lvl+0x91/0xf0 [ 32.421513] print_report+0xcc/0x620 [ 32.421995] ? __virt_addr_valid+0x102/0x340 [ 32.422542] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.423162] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.423771] kasan_report+0xbe/0xf0 [ 32.424254] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.424868] vma_interval_tree_remove+0xc75/0xec0 [ 32.425480] vma_prepare+0xc54/0x11a0 [ 32.425961] __split_vma+0x5af/0x950 [ 32.426430] ? __pfx___split_vma+0x10/0x10 [ 32.426964] ? find_held_lock+0x2c/0x110 [ 32.427481] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.428051] ? lock_is_held_type+0x9f/0x120 [ 32.428626] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.429234] ? mtree_range_walk+0x632/0x900 [ 32.429790] ? mas_walk+0x5c7/0x7c0 [ 32.430270] do_vmi_munmap+0x1f1/0x2b0 [ 32.430765] mmap_region+0x1f9/0x2660 [ 32.431249] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.431761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.432483] ? __pfx_lock_acquire+0x10/0x10 [ 32.433015] ? __pfx_mmap_region+0x10/0x10 [ 32.433546] ? security_mmap_addr+0x7d/0xa0 [ 32.434079] ? get_unmapped_area+0x1f5/0x3f0 [ 32.434628] do_mmap+0x854/0xf00 [ 32.435069] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.435566] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.436143] ksys_mmap_pgoff+0x3af/0x500 [ 32.436649] do_syscall_64+0x3f/0x90 [ 32.437126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.437776] RIP: 0033:0x7f52bb3d7d82 [ 32.438236] 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 [ 32.440393] RSP: 002b:00007fff479d4a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.441316] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f52bb3d7d82 [ 32.442191] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f52ba811000 [ 32.443050] RBP: 00007f52ba811000 R08: 0000000000000009 R09: 0000000000001000 [ 32.443910] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f060dbec0 [ 32.444827] R13: 00007fff479d4a60 R14: 00007fff479d4a90 R15: 00007fff479d4df0 [ 32.445728] [ 32.446036] [ 32.446258] Allocated by task 211: [ 32.446705] kasan_save_stack+0x22/0x50 [ 32.447227] kasan_set_track+0x25/0x30 [ 32.447738] __kasan_slab_alloc+0x59/0x70 [ 32.448313] kmem_cache_alloc+0x16b/0x370 [ 32.448857] vm_area_dup+0x20/0x160 [ 32.449342] __split_vma+0x170/0x950 [ 32.449827] split_vma+0xc6/0x110 [ 32.450291] mprotect_fixup+0x8d2/0xb30 [ 32.450825] do_mprotect_pkey+0x87e/0xd40 [ 32.451373] __x64_sys_mprotect+0x78/0xc0 [ 32.451922] do_syscall_64+0x3f/0x90 [ 32.452435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.453105] [ 32.453339] Freed by task 211: [ 32.453773] kasan_save_stack+0x22/0x50 [ 32.454296] kasan_set_track+0x25/0x30 [ 32.454811] kasan_save_free_info+0x2b/0x50 [ 32.455372] __kasan_slab_free+0x10a/0x190 [ 32.455928] kmem_cache_free+0x10d/0x4d0 [ 32.456463] rcu_core+0x8c8/0x2860 [ 32.456931] __do_softirq+0x1b7/0x7d4 [ 32.457431] [ 32.457656] Last potentially related work creation: [ 32.458273] kasan_save_stack+0x22/0x50 [ 32.458799] __kasan_record_aux_stack+0x8e/0xa0 [ 32.459464] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.460146] remove_vma+0x139/0x170 [ 32.460617] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.461201] do_vmi_munmap+0x1f1/0x2b0 [ 32.461713] __vm_munmap+0x138/0x3a0 [ 32.462204] __x64_sys_munmap+0x59/0x80 [ 32.462729] do_syscall_64+0x3f/0x90 [ 32.463233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.463907] [ 32.464140] The buggy address belongs to the object at ffff88800d54a000 [ 32.464140] which belongs to the cache vm_area_struct of size 168 [ 32.465685] The buggy address is located 88 bytes inside of [ 32.465685] freed 168-byte region [ffff88800d54a000, ffff88800d54a0a8) [ 32.467162] [ 32.467388] The buggy address belongs to the physical page: [ 32.468103] page:0000000095baeab5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd54a [ 32.469250] memcg:ffff88801a209901 [ 32.469694] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.470368] page_type: 0xffffffff() [ 32.470841] raw: 0100000000000200 ffff8880087a0c80 ffffea0000686d40 000000000000000e [ 32.471805] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a209901 [ 32.472764] page dumped because: kasan: bad access detected [ 32.473454] [ 32.473678] Memory state around the buggy address: [ 32.474290] ffff88800d549f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.475192] ffff88800d549f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.476111] >ffff88800d54a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.477017] ^ [ 32.477784] ffff88800d54a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.478642] ffff88800d54a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.479489] ================================================================== [ 32.480427] Disabling lock debugging due to kernel taint [ 34.451092] BUG: Bad rss-counter state mm:000000009d433ad6 type:MM_FILEPAGES val:33 [ 34.452337] BUG: Bad rss-counter state mm:000000009d433ad6 type:MM_ANONPAGES val:22 [ 34.977595] BUG: Bad rss-counter state mm:00000000f18cc3f8 type:MM_FILEPAGES val:33 [ 34.978740] BUG: Bad rss-counter state mm:00000000f18cc3f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18542' (ECDSA) to the list of known hosts. 2023/06/20 15:34:09 fuzzer started 2023/06/20 15:34:10 dialing manager at localhost:36067 2023/06/20 15:34:10 checking machine... 2023/06/20 15:34:10 checking revisions... [ 35.712287] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:34:10 testing simple program... [ 35.765160] cgroup: Unknown subsys name 'net' [ 35.804590] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:34:09 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=0000000000000001 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=00007fff9f340b18 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=00007fcb9c8c4510000055acb2007790 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=00007f0dbe2e44a0 RBX=0000561f0226fa40 RCX=0000561f0226fb30 RDX=0000000000000000 RSI=00000000fbad0000 RDI=0000561f0226fa40 RBP=00007f0dbdd2615e RSP=00007fff48c2de00 R8 =00007f0dbe2e3f60 R9 =00007f0dbe2e2be0 R10=0000000000400000 R11=0000000000000000 R12=00007f0dbdd26003 R13=0000561f0226fa40 R14=0000000000000001 R15=0000561f022686c0 RIP=00007f0dbe1a6082 RFL=00000286 [--S--P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0dbdd30900 00000000 00000000 GS =0000 0000000000000000 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=00007f0dbe2e80b0 CR3=000000000e484000 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=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