ci2 starts bisection 2026-11-13 08:38:49.316039312 +0000 UTC m=+9743.079922407 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: 8acfac08bd61f24c1cba68fc1d04434e9fcf056e32ab2cf2eacd6b034e6cd3ef 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: 2884b68c8cf0ab61c48d49d4be5ac678a96f3bd91c8c0871bdade80fc8592b98 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=4925 full=6218 leaves diff=255 split chunks (needed=false): <255> split chunk #0 of len 255 into 5 parts testing without sub-chunk 1/5 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: 0c453726a41756f5c240cdbdb6f56ab3c2cf9689c6c68e18e7dc56964ddda569 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: 3ce2c5db45d8af1ab48880552136ca88e0901853de692ef9749d9eb9024ed9d8 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 3/5 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: bd9ac10ff0bafa77dfe58ef8ff3b504208d8bb1cde6d7902863174db66b6e4b7 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 [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: 2d0ea3c13a210c16c8892993584519dc0ff22414d16e524f643d041a50e238fb 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 [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 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 51 configs; suspects: [HID_ZEROPLUS USB_LINK_LAYER_TEST USB_MON USB_NET_CDC_MBIM 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 [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing current HEAD f181319b13edc6e68c367bc247e36bc255097483 testing commit f181319b13edc6e68c367bc247e36bc255097483 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: f6450efa39978952c5e2ef5419ffdc3165c4dcd5fa767b264c4da84378c229d6 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: 2h8m15.680278432s (build: 39m48.511777985s, test: 59m53.782446861s) crash still not fixed or there were kernel test errors commit msg: Merge android13-5.15 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 ffff88812600a000 by task syz.2.17/453 CPU: 0 PID: 453 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026 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: 0033:0x7fc1242a5e59 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:00007fc124107028 EFLAGS: 00000246 ORIG_RAX: 000000000000005e RAX: ffffffffffffffda RBX: 00007fc12452dfa0 RCX: 00007fc1242a5e59 RDX: 0000000000000000 RSI: 00000000000000ff RDI: 00002000000004c0 RBP: 00007fc12433be6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc12452e038 R14: 00007fc12452dfa0 R15: 00007ffc5abdb118 The buggy address belongs to the page: page:ffffea0004980280 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x12600a flags: 0x4000000000000000(zone=1) raw: 4000000000000000 ffffea0004980348 ffffea000497fd48 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 453, ts 39500345596, free_ts 39509206530 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook mm/page_alloc.c:2610 [inline] prep_new_page+0x1a2/0x310 mm/page_alloc.c:2616 get_page_from_freelist+0x1da1/0x3180 mm/page_alloc.c:4492 __alloc_pages+0x300/0x2d60 mm/page_alloc.c:5829 __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+0x33b/0x690 mm/memory.c:5345 do_user_addr_fault+0x726/0x1120 arch/x86/mm/fault.c:1323 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:1477 [inline] free_pcp_prepare+0x263/0x660 mm/page_alloc.c:1549 free_unref_page_prepare mm/page_alloc.c:3540 [inline] free_unref_page_list+0x1e3/0xcd0 mm/page_alloc.c:3677 release_pages+0x382/0x12d0 mm/swap.c:1033 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:2693 __do_munmap+0x481/0x1000 mm/mmap.c:2926 __vm_munmap+0x117/0x240 mm/mmap.c:2979 __do_sys_munmap mm/mmap.c:3005 [inline] __se_sys_munmap mm/mmap.c:3001 [inline] __x64_sys_munmap+0x62/0x80 mm/mmap.c:3001 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: ffff888126009f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888126009f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88812600a000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88812600a080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88812600a100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================