[ 36.174232] BUG: Bad rss-counter state mm:00000000cf7e52ba type:MM_FILEPAGES val:33 [ 36.175203] BUG: Bad rss-counter state mm:00000000cf7e52ba type:MM_ANONPAGES val:22 [ 36.334890] ================================================================== [ 36.335802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.336742] Read of size 8 at addr ffff88801a327d08 by task sshd/218 [ 36.337530] [ 36.337750] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.338732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.339713] Call Trace: [ 36.340032] [ 36.340338] dump_stack_lvl+0x91/0xf0 [ 36.340847] print_report+0xcc/0x620 [ 36.341342] ? __virt_addr_valid+0x102/0x340 [ 36.341907] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.342545] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.343166] kasan_report+0xbe/0xf0 [ 36.343638] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.344261] vma_interval_tree_remove+0xc75/0xec0 [ 36.344861] vma_prepare+0xc54/0x11a0 [ 36.345354] __split_vma+0x5af/0x950 [ 36.345827] ? __pfx___split_vma+0x10/0x10 [ 36.346353] ? find_held_lock+0x2c/0x110 [ 36.346875] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.347445] ? lock_is_held_type+0x9f/0x120 [ 36.347984] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.348595] ? mtree_range_walk+0x632/0x900 [ 36.349164] ? mas_walk+0x5c7/0x7c0 [ 36.349637] do_vmi_munmap+0x1f1/0x2b0 [ 36.350126] mmap_region+0x1f9/0x2660 [ 36.350611] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.351123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.351837] ? __pfx_lock_acquire+0x10/0x10 [ 36.352372] ? __pfx_mmap_region+0x10/0x10 [ 36.352901] ? security_mmap_addr+0x7d/0xa0 [ 36.353453] ? get_unmapped_area+0x1f5/0x3f0 [ 36.353999] do_mmap+0x854/0xf00 [ 36.354439] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.354941] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.355504] ksys_mmap_pgoff+0x3af/0x500 [ 36.356013] do_syscall_64+0x3f/0x90 [ 36.356495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.357147] RIP: 0033:0x7fb9a552cd82 [ 36.357611] 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 [ 36.359731] RSP: 002b:00007ffe9be4ef88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.360648] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9a552cd82 [ 36.361524] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9a4966000 [ 36.362371] RBP: 00007fb9a4966000 R08: 0000000000000009 R09: 0000000000001000 [ 36.363217] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2b71aeec0 [ 36.364072] R13: 00007ffe9be4efa0 R14: 00007ffe9be4efd0 R15: 00007ffe9be4f330 [ 36.364928] [ 36.365230] [ 36.365449] Allocated by task 208: [ 36.365874] kasan_save_stack+0x22/0x50 [ 36.366381] kasan_set_track+0x25/0x30 [ 36.366877] __kasan_slab_alloc+0x59/0x70 [ 36.367405] kmem_cache_alloc+0x16b/0x370 [ 36.367920] vm_area_dup+0x20/0x160 [ 36.368373] __split_vma+0x170/0x950 [ 36.368846] split_vma+0xc6/0x110 [ 36.369304] mprotect_fixup+0x8d2/0xb30 [ 36.369805] do_mprotect_pkey+0x87e/0xd40 [ 36.370342] __x64_sys_mprotect+0x78/0xc0 [ 36.370877] do_syscall_64+0x3f/0x90 [ 36.371364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.372019] [ 36.372234] Freed by task 19: [ 36.372609] kasan_save_stack+0x22/0x50 [ 36.373127] kasan_set_track+0x25/0x30 [ 36.373620] kasan_save_free_info+0x2b/0x50 [ 36.374160] __kasan_slab_free+0x10a/0x190 [ 36.374692] kmem_cache_free+0x10d/0x4d0 [ 36.375201] rcu_core+0x8c8/0x2860 [ 36.375647] __do_softirq+0x1b7/0x7d4 [ 36.376123] [ 36.376341] Last potentially related work creation: [ 36.376941] kasan_save_stack+0x22/0x50 [ 36.377455] __kasan_record_aux_stack+0x8e/0xa0 [ 36.378032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.378674] remove_vma+0x139/0x170 [ 36.379128] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.379686] do_vmi_munmap+0x1f1/0x2b0 [ 36.380174] __vm_munmap+0x138/0x3a0 [ 36.380643] __x64_sys_munmap+0x59/0x80 [ 36.381159] do_syscall_64+0x3f/0x90 [ 36.381637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.382276] [ 36.382496] The buggy address belongs to the object at ffff88801a327cb0 [ 36.382496] which belongs to the cache vm_area_struct of size 168 [ 36.383953] The buggy address is located 88 bytes inside of [ 36.383953] freed 168-byte region [ffff88801a327cb0, ffff88801a327d58) [ 36.385361] [ 36.385585] The buggy address belongs to the physical page: [ 36.386238] page:000000002cbd4c08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a327 [ 36.387322] memcg:ffff88801a2fcb01 [ 36.387752] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.388401] page_type: 0xffffffff() [ 36.388854] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.389792] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2fcb01 [ 36.390696] page dumped because: kasan: bad access detected [ 36.391364] [ 36.391590] Memory state around the buggy address: [ 36.392174] ffff88801a327c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.393043] ffff88801a327c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.393898] >ffff88801a327d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.394750] ^ [ 36.395195] ffff88801a327d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.396056] ffff88801a327e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.396914] ================================================================== [ 36.397890] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.465626] BUG: Bad rss-counter state mm:0000000040081b92 type:MM_FILEPAGES val:33 [ 38.466612] BUG: Bad rss-counter state mm:0000000040081b92 type:MM_ANONPAGES val:22 [ 38.989614] BUG: Bad rss-counter state mm:00000000f60fc292 type:MM_FILEPAGES val:33 [ 38.990803] BUG: Bad rss-counter state mm:00000000f60fc292 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9670' (ECDSA) to the list of known hosts. 2023/06/19 12:55:07 fuzzer started 2023/06/19 12:55:07 dialing manager at localhost:44161 2023/06/19 12:55:07 checking machine... 2023/06/19 12:55:07 checking revisions... [ 39.613725] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:55:07 testing simple program... [ 39.669443] cgroup: Unknown subsys name 'net' [ 39.707257] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:55:01 Registers: info registers vcpu 0 RAX=000055e460d4bb20 RBX=000055e460d4bb20 RCX=0000000000000020 RDX=0000000000000000 RSI=0000000000000023 RDI=000055e460d4bb20 RBP=0000000000000034 RSP=00007ffdacccabb0 R8 =000055e460d775ae R9 =00007fa5e1b0cbe0 R10=0000000000000100 R11=0000000000000246 R12=000055e460d68f70 R13=00007ffdacccabb8 R14=00007fa5e1535b22 R15=00007fa5e155a710 RIP=00007fa5e2087397 RFL=00000202 [-------] 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 00007fa5e155a900 00000000 00000000 GS =0000 0000000000000000 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=00007ffdaccc5000 CR3=000000000c632000 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=23232323232323232323232323232323 XMM01=000000000000000000000000000000ff XMM02=00000000000000000000000000000000 XMM03=6f206c6c4120202e64656d7573736120 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=20646562697263736564206568742023 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fa777e6efc0 CR3=000000000e3a2000 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=2037303a35353a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a35353a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000