ci2 starts bisection 2026-08-09 23:37:52.101040031 +0000 UTC m=+157271.353645095 bisecting fixing commit since 0a85a2bd13c2b1bf366ff86053fb6300e1aae48e building syzkaller on 99e643756a094413adb404dd52825e7034232325 ensuring issue is reproducible on original commit 0a85a2bd13c2b1bf366ff86053fb6300e1aae48e testing commit 0a85a2bd13c2b1bf366ff86053fb6300e1aae48e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: dc51411f447f55e7f7d20f6124d365e2a6571eaeb4177a4a089f469e4fed1d6e all runs: crashed: KASAN: use-after-free Read in ext4_get_inode_usage representative crash: KASAN: use-after-free Read in ext4_get_inode_usage, types: [KASAN-USE-AFTER-FREE-READ] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit 0a85a2bd13c2b1bf366ff86053fb6300e1aae48e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: d86c23850eeb542d0cc1395a365a4b5426ebd1aa63ac6f269f928bd57c4915f6 all runs: crashed: KASAN: use-after-free Read in ext4_get_inode_usage representative crash: KASAN: use-after-free Read in ext4_get_inode_usage, types: [KASAN-USE-AFTER-FREE-READ] the bug reproduces without the instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed kconfig minimization: base=4921 full=6218 leaves diff=256 split chunks (needed=false): <256> split chunk #0 of len 256 into 5 parts testing without sub-chunk 1/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed testing commit 0a85a2bd13c2b1bf366ff86053fb6300e1aae48e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 756144140e16f1e9b2c2cd37dccfbbab8ccd11a11feafe12534220391fae3d55 all runs: crashed: KASAN: use-after-free Read in ext4_get_inode_usage representative crash: KASAN: use-after-free Read in ext4_get_inode_usage, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 0a85a2bd13c2b1bf366ff86053fb6300e1aae48e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 65d36ae9ab7a5be2b1c197518291c7302d002121e217e7140d3b5567b9c9d90c run #0: crashed: KASAN: use-after-free Read in ext4_get_inode_usage run #1: crashed: KASAN: use-after-free Read in ext4_get_inode_usage run #2: crashed: KASAN: use-after-free Read in ext4_get_inode_usage run #3: crashed: KASAN: use-after-free Read in ext4_get_inode_usage run #4: crashed: KASAN: use-after-free Read in ext4_get_inode_usage run #5: crashed: KASAN: use-after-free Read in ext4_get_inode_usage run #6: crashed: KASAN: use-after-free Read in ext4_get_inode_usage run #7: crashed: KASAN: use-after-free Read in ext4_get_inode_usage run #8: crashed: KASAN: out-of-bounds Read in ext4_get_inode_usage run #9: crashed: KASAN: use-after-free Read in ext4_get_inode_usage representative crash: KASAN: use-after-free Read in ext4_get_inode_usage, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit 0a85a2bd13c2b1bf366ff86053fb6300e1aae48e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 3c32a7266d3944ea83e7f70d9420216c61643453113e332b209f7382f77e802b all runs: crashed: KASAN: use-after-free Read in ext4_get_inode_usage representative crash: KASAN: use-after-free Read in ext4_get_inode_usage, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit 0a85a2bd13c2b1bf366ff86053fb6300e1aae48e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: f61f0977efba0fbdab5087fa65648041db4c0125e6b540406fc907269b6ae491 all runs: crashed: KASAN: use-after-free Read in ext4_get_inode_usage representative crash: KASAN: use-after-free Read in ext4_get_inode_usage, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit 0a85a2bd13c2b1bf366ff86053fb6300e1aae48e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building 0a85a2bd13c2b1bf366ff86053fb6300e1aae48e: net/socket.c:1188:(.text+0x6d1a): undefined reference to `wext_handle_ioctl' net/socket.c:3389:(.text+0x7314): undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:343:(.text+0x33b): undefined reference to `wext_proc_exit' net/core/net-procfs.c:327:(.text+0x4e2): undefined reference to `wext_proc_init' minimized to 48 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL USB_SERIAL_FTDI_SIO USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM USB_XHCI_PCI_RENESAS WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_ZYDAS ZEROPLUS_FF] disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed testing current HEAD 6148a1b6bae4b45b3b53c2efe726b15e4956baa9 testing commit 6148a1b6bae4b45b3b53c2efe726b15e4956baa9 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 3d501a12f3be91209477a2a6d9b2a57362eea05ffa8f87013c9e3bb58b9f91e8 all runs: crashed: KASAN: use-after-free Read in ext4_get_inode_usage representative crash: KASAN: use-after-free Read in ext4_get_inode_usage, types: [KASAN-USE-AFTER-FREE-READ] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h28m31.873525228s (build: 28m20.659648861s, test: 43m30.50873324s) crash still not fixed or there were kernel test errors commit msg: Merge 203355010cb2 ("net/sched: act_pedit: use NLA_POLICY for parsing 'ex' keys") into android13-5.15-lts crash: KASAN: use-after-free Read in ext4_get_inode_usage ================================================================== BUG: KASAN: use-after-free in ext4_get_inode_usage+0x2c6/0x970 fs/ext4/xattr.c:823 Read of size 4 at addr ffff888124a16000 by task syz.2.17/451 CPU: 1 PID: 451 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x38/0x49 lib/dump_stack.c:106 print_address_description.constprop.0+0x24/0x160 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report.cold+0x82/0xdb mm/kasan/report.c:444 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 ext4_get_inode_usage+0x2c6/0x970 fs/ext4/xattr.c:823 __dquot_transfer+0x1a8/0x1380 fs/quota/dquot.c:2037 dquot_transfer+0x24a/0x3f0 fs/quota/dquot.c:2189 ext4_setattr+0x422/0x2180 fs/ext4/inode.c:5508 notify_change+0x4b4/0xeb0 fs/attr.c:505 chown_common+0x3e6/0x650 fs/open.c:681 do_fchownat+0xe9/0x160 fs/open.c:712 __do_sys_lchown fs/open.c:737 [inline] __se_sys_lchown fs/open.c:735 [inline] __x64_sys_lchown+0x79/0xb0 fs/open.c:735 x64_sys_call+0x6f0/0x990 arch/x86/include/generated/asm/syscalls_64.h:95 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f7cc6118e59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7cc5f7a028 EFLAGS: 00000246 ORIG_RAX: 000000000000005e RAX: ffffffffffffffda RBX: 00007f7cc63a0fa0 RCX: 00007f7cc6118e59 RDX: 0000000000000000 RSI: 00000000000000ff RDI: 00002000000004c0 RBP: 00007f7cc61aee6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7cc63a1038 R14: 00007f7cc63a0fa0 R15: 00007ffff4f782f8 The buggy address belongs to the page: page:ffffea0004928580 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x124a16 flags: 0x4000000000000000(zone=1) raw: 4000000000000000 ffffea0004537ec8 ffffea0004920688 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x100dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO), pid 401, ts 40214392837, free_ts 40216311845 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook mm/page_alloc.c:2607 [inline] prep_new_page+0x1a2/0x310 mm/page_alloc.c:2613 get_page_from_freelist+0x1ce2/0x30a0 mm/page_alloc.c:4487 __alloc_pages+0x300/0x2d60 mm/page_alloc.c:5824 __alloc_pages_node include/linux/gfp.h:595 [inline] alloc_pages_node include/linux/gfp.h:609 [inline] alloc_pages include/linux/gfp.h:622 [inline] do_anonymous_page mm/memory.c:4072 [inline] handle_pte_fault+0xc54/0x31c0 mm/memory.c:4921 __handle_mm_fault+0x4ea/0x1480 mm/memory.c:5219 do_handle_mm_fault+0x1da/0x690 mm/memory.c:5345 handle_mm_fault include/linux/mm.h:1847 [inline] do_user_addr_fault+0x2ea/0x1120 arch/x86/mm/fault.c:1416 handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1560 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:606 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1474 [inline] free_pcp_prepare+0x263/0x660 mm/page_alloc.c:1546 free_unref_page_prepare mm/page_alloc.c:3536 [inline] free_unref_page_list+0x1e3/0xcd0 mm/page_alloc.c:3673 release_pages+0x382/0x12d0 mm/swap.c:1015 free_pages_and_swap_cache+0x5d/0x80 mm/swap_state.c:320 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu mm/mmu_gather.c:247 [inline] tlb_finish_mmu+0x129/0x790 mm/mmu_gather.c:338 unmap_region+0x2cd/0x3d0 mm/mmap.c:2692 __do_munmap+0x481/0x1000 mm/mmap.c:2925 __vm_munmap+0x117/0x240 mm/mmap.c:2978 __do_sys_munmap mm/mmap.c:3004 [inline] __se_sys_munmap mm/mmap.c:3000 [inline] __x64_sys_munmap+0x62/0x80 mm/mmap.c:3000 x64_sys_call+0x935/0x990 arch/x86/include/generated/asm/syscalls_64.h:12 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff888124a15f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888124a15f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888124a16000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888124a16080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888124a16100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================