[ 30.589444] BUG: Bad rss-counter state mm:0000000074c4dc2e type:MM_FILEPAGES val:33 [ 30.590840] BUG: Bad rss-counter state mm:0000000074c4dc2e type:MM_ANONPAGES val:22 [ 30.704121] ================================================================== [ 30.704827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.705554] Read of size 8 at addr ffff88800ec66c20 by task sshd/219 [ 30.706164] [ 30.706338] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.707097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.707842] Call Trace: [ 30.708088] [ 30.708310] dump_stack_lvl+0x91/0xf0 [ 30.708692] print_report+0xcc/0x620 [ 30.709066] ? __virt_addr_valid+0x102/0x340 [ 30.709499] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709977] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710453] kasan_report+0xbe/0xf0 [ 30.710821] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.711297] vma_interval_tree_remove+0xc75/0xec0 [ 30.711759] vma_prepare+0xc54/0x11a0 [ 30.712126] __split_vma+0x5af/0x950 [ 30.712502] ? __pfx___split_vma+0x10/0x10 [ 30.712904] ? find_held_lock+0x2c/0x110 [ 30.713232] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.713591] ? lock_is_held_type+0x9f/0x120 [ 30.713927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.714296] ? mtree_range_walk+0x632/0x900 [ 30.714637] ? mas_walk+0x5c7/0x7c0 [ 30.714954] do_vmi_munmap+0x1f1/0x2b0 [ 30.715267] mmap_region+0x1f9/0x2660 [ 30.715540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.715828] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.716267] ? __pfx_lock_acquire+0x10/0x10 [ 30.716595] ? __pfx_mmap_region+0x10/0x10 [ 30.716913] ? security_mmap_addr+0x7d/0xa0 [ 30.717246] ? get_unmapped_area+0x1f5/0x3f0 [ 30.717577] do_mmap+0x854/0xf00 [ 30.717842] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.718141] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.718486] ksys_mmap_pgoff+0x3af/0x500 [ 30.718802] do_syscall_64+0x3f/0x90 [ 30.719095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.719491] RIP: 0033:0x7fa72d331d82 [ 30.719773] 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 [ 30.721089] RSP: 002b:00007ffc183c0018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.721650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa72d331d82 [ 30.722172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa72c76b000 [ 30.722734] RBP: 00007fa72c76b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.723266] R10: 0000000000000812 R11: 0000000000000206 R12: 000055996f18df70 [ 30.723793] R13: 00007ffc183c0030 R14: 00007ffc183c0060 R15: 00007ffc183c03c0 [ 30.724311] [ 30.724479] [ 30.724629] Allocated by task 212: [ 30.724884] kasan_save_stack+0x22/0x50 [ 30.725191] kasan_set_track+0x25/0x30 [ 30.725495] __kasan_slab_alloc+0x59/0x70 [ 30.725826] kmem_cache_alloc+0x16b/0x370 [ 30.726145] vm_area_dup+0x20/0x160 [ 30.726428] __split_vma+0x170/0x950 [ 30.726718] split_vma+0xc6/0x110 [ 30.726976] mprotect_fixup+0x8d2/0xb30 [ 30.727290] do_mprotect_pkey+0x87e/0xd40 [ 30.727607] __x64_sys_mprotect+0x78/0xc0 [ 30.727918] do_syscall_64+0x3f/0x90 [ 30.728201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.728605] [ 30.728729] Freed by task 212: [ 30.728963] kasan_save_stack+0x22/0x50 [ 30.729272] kasan_set_track+0x25/0x30 [ 30.729566] kasan_save_free_info+0x2b/0x50 [ 30.729886] __kasan_slab_free+0x10a/0x190 [ 30.730209] kmem_cache_free+0x10d/0x4d0 [ 30.730520] rcu_core+0x8c8/0x2860 [ 30.730790] __do_softirq+0x1b7/0x7d4 [ 30.731082] [ 30.731215] Last potentially related work creation: [ 30.731572] kasan_save_stack+0x22/0x50 [ 30.731875] __kasan_record_aux_stack+0x8e/0xa0 [ 30.732223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.732619] remove_vma+0x139/0x170 [ 30.732894] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.733230] do_vmi_munmap+0x1f1/0x2b0 [ 30.733520] __vm_munmap+0x138/0x3a0 [ 30.733806] __x64_sys_munmap+0x59/0x80 [ 30.734106] do_syscall_64+0x3f/0x90 [ 30.734388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.734777] [ 30.734906] Second to last potentially related work creation: [ 30.735328] kasan_save_stack+0x22/0x50 [ 30.735625] __kasan_record_aux_stack+0x8e/0xa0 [ 30.735974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.736368] remove_vma+0x139/0x170 [ 30.736650] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.736983] do_vmi_munmap+0x1f1/0x2b0 [ 30.737276] mmap_region+0x1f9/0x2660 [ 30.737571] do_mmap+0x854/0xf00 [ 30.737826] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.738119] ksys_mmap_pgoff+0x3af/0x500 [ 30.738424] do_syscall_64+0x3f/0x90 [ 30.738712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739101] [ 30.739227] The buggy address belongs to the object at ffff88800ec66bc8 [ 30.739227] which belongs to the cache vm_area_struct of size 168 [ 30.740130] The buggy address is located 88 bytes inside of [ 30.740130] freed 168-byte region [ffff88800ec66bc8, ffff88800ec66c70) [ 30.740989] [ 30.741120] The buggy address belongs to the physical page: [ 30.741522] page:0000000014cdf903 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec66 [ 30.742179] memcg:ffff88800d389a01 [ 30.742435] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.742826] page_type: 0xffffffff() [ 30.743107] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.743666] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d389a01 [ 30.744215] page dumped because: kasan: bad access detected [ 30.744615] [ 30.744744] Memory state around the buggy address: [ 30.745100] ffff88800ec66b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.745621] ffff88800ec66b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.746137] >ffff88800ec66c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.746659] ^ [ 30.746977] ffff88800ec66c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.747509] ffff88800ec66d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.748046] ================================================================== [ 30.748642] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.675432] BUG: Bad rss-counter state mm:000000000ce8d4ee type:MM_FILEPAGES val:33 [ 32.676425] BUG: Bad rss-counter state mm:000000000ce8d4ee type:MM_ANONPAGES val:22 [ 33.262945] BUG: Bad rss-counter state mm:0000000007030881 type:MM_FILEPAGES val:33 [ 33.264313] BUG: Bad rss-counter state mm:0000000007030881 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45995' (ECDSA) to the list of known hosts. 2023/06/19 15:14:27 fuzzer started 2023/06/19 15:14:27 dialing manager at localhost:44161 2023/06/19 15:14:27 checking machine... 2023/06/19 15:14:27 checking revisions... [ 33.943573] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:14:28 testing simple program... [ 33.990866] cgroup: Unknown subsys name 'net' [ 34.054213] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:14:20 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=0000557671b9a050 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=00007f43b9f50510000055e1a4e3c790 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=0000000000000003 RBX=0000000000000200 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8450b678 RBP=ffff888019fb7f58 RSP=ffff888019fb7f18 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007fdf60f0d0b0 R15=0000000000000000 RIP=ffffffff8450b935 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdf60955900 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=00007fdf60f0d0b0 CR3=000000000e7ae000 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