ci2 starts bisection 2025-06-06 12:32:34.865999857 +0000 UTC m=+11398.272079301 bisecting fixing commit since 8e60a714ba3bb083b7321385054fa39ceb876914 building syzkaller on 1c4febdbbe8f34403baef506b22cd689576927f6 ensuring issue is reproducible on original commit 8e60a714ba3bb083b7321385054fa39ceb876914 testing commit 8e60a714ba3bb083b7321385054fa39ceb876914 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 3fdee0f04c354813a88b32cc1894e2a338a5e61181586c4e8f576a2618747bc4 all runs: crashed: WARNING in chmod_common representative crash: WARNING in chmod_common, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing commit 8e60a714ba3bb083b7321385054fa39ceb876914 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 2ee735dcabcfd3944996a90980fcb962a5bcc0a1c68c2778f5cfed34357f7cef run #0: crashed: general protection fault in release_pages run #1: crashed: general protection fault in release_pages run #2: crashed: general protection fault in release_pages run #3: crashed: general protection fault in release_pages run #4: crashed: general protection fault in release_pages run #5: crashed: general protection fault in release_pages run #6: crashed: general protection fault in release_pages run #7: crashed: general protection fault in release_pages run #8: OK run #9: OK representative crash: general protection fault in release_pages, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed kconfig minimization: base=3829 full=7499 leaves diff=2071 split chunks (needed=false): <2071> split chunk #0 of len 2071 into 5 parts testing without sub-chunk 1/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 8e60a714ba3bb083b7321385054fa39ceb876914 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 795a1b4ff83fa5c5fd3c8d089ef349a878b58f0f46f5e627f19228b1f4a4394f run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in dump_page run #1: crashed: general protection fault in release_pages run #2: crashed: general protection fault in release_pages run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in dump_page run #4: crashed: WARNING in chmod_common run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in dump_page run #6: crashed: general protection fault in release_pages run #7: crashed: WARNING in chmod_common run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in dump_page run #9: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in dump_page, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 8e60a714ba3bb083b7321385054fa39ceb876914 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: aaba26036497a4dfe752728560b4cd9cec468aa1c06d12751bc275b324bf7e43 run #0: crashed: general protection fault in release_pages run #1: crashed: general protection fault in release_pages run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in dump_page run #3: crashed: general protection fault in release_pages run #4: crashed: general protection fault in release_pages run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: general protection fault in release_pages, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 8e60a714ba3bb083b7321385054fa39ceb876914 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 8a6a242c5ee351229dc8bcce324e77c0371f31a8f906004cd7354a7fd95af57b run #0: crashed: WARNING in chmod_common run #1: crashed: WARNING in chmod_common run #2: crashed: WARNING in chmod_common run #3: crashed: WARNING in chmod_common run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: WARNING in chmod_common, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 8e60a714ba3bb083b7321385054fa39ceb876914 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: db142ac6d2ef586571e9022a9c48a9372217881c2eb7cd51ddb4338bb5a183f5 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 8e60a714ba3bb083b7321385054fa39ceb876914 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 2789bb7587ca573d20df8691f67256b523de6d39617ff957a97a47438df0c207 run #0: crashed: WARNING in chmod_common run #1: crashed: WARNING in chmod_common run #2: crashed: WARNING in chmod_common run #3: crashed: WARNING in chmod_common run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: WARNING in chmod_common, types: [WARNING] minimized to 826 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL BXT_WC_PMIC_OPREGION CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DAX DLM DRM DVB_CORE ENCRYPTED_KEYS EXTCON FB GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_THRUSTMASTER HID_ZEROPLUS I2C_MUX IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IP_SCTP IRQ_REMAP KVM KVM_INTEL L2TP LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_COMMON_OPTIONS MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MFD_VIPERBOARD MMC MTD MTD_UBI NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 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WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_X2APIC X86_X32_ABI XARRAY_MULTI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZBUD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZONE_DEVICE ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD] disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing current HEAD 58485ff1a74f6c5be9e7c6aafb7293e4337348e7 testing commit 58485ff1a74f6c5be9e7c6aafb7293e4337348e7 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: ce79c91f574681a421ce705009520dbd75f70feb323f45efbdedc094937183df run #0: crashed: WARNING in chmod_common run #1: crashed: WARNING in chmod_common run #2: crashed: WARNING in chmod_common run #3: crashed: WARNING in chmod_common run #4: crashed: BUG: unable to handle kernel paging request in call_rcu run #5: crashed: WARNING in chmod_common run #6: crashed: WARNING in chmod_common run #7: crashed: WARNING in chmod_common run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: WARNING in chmod_common, types: [WARNING] crash still not fixed/happens on the oldest tested release reproducer is flaky (0.40 repro chance estimate) revisions tested: 8, total time: 2h38m25.671644477s (build: 35m31.872767092s, test: 1h50m53.149553616s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.141 crash: WARNING in chmod_common ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88811bdaf788, owner = 0x0, curr 0xffff8881206f3880, list empty WARNING: CPU: 0 PID: 12194 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline] WARNING: CPU: 0 PID: 12194 at kernel/locking/rwsem.c:1372 up_write+0x173/0x180 kernel/locking/rwsem.c:1626 Modules linked in: CPU: 0 PID: 12194 Comm: syz.6.3562 Not tainted 6.1.141-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__up_write kernel/locking/rwsem.c:1371 [inline] RIP: 0010:up_write+0x173/0x180 kernel/locking/rwsem.c:1626 Code: c7 c0 70 a1 85 83 49 c7 c2 28 c4 80 83 4c 0f 44 d0 48 c7 c7 2e a0 9f 83 48 c7 c6 16 e7 96 83 41 52 e8 51 1c 8f 01 48 83 c4 08 <0f> 0b e9 fa fe ff ff 66 0f 1f 44 00 00 41 57 41 56 53 48 83 ec 18 RSP: 0018:ffffc9000254fe20 EFLAGS: 00010292 RAX: de35238a028bfb00 RBX: ffff88811bdaf788 RCX: de35238a028bfb00 RDX: 0000000000000000 RSI: 00000000ffffe39c RDI: 00000000ffffffff RBP: 000000000000018e R08: 000000000000039c R09: ffffffff83ca4080 R10: 0000000000000ad4 R11: 00000000ffffe39c R12: 000000000000018e R13: 0000000000000000 R14: ffff88811bdaf788 R15: ffff88811bdaf6a8 FS: 00007fc79a9336c0(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd0a405a000 CR3: 0000000120508000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: inode_unlock include/linux/fs.h:763 [inline] chmod_common+0x138/0x1b0 fs/open.c:609 do_fchmodat+0x59/0xd0 fs/open.c:645 __do_sys_chmod fs/open.c:663 [inline] __se_sys_chmod fs/open.c:661 [inline] __x64_sys_chmod+0x12/0x20 fs/open.c:661 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc799b8d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc79a933038 EFLAGS: 00000246 ORIG_RAX: 000000000000005a RAX: ffffffffffffffda RBX: 00007fc799da6080 RCX: 00007fc799b8d169 RDX: 0000000000000000 RSI: 000000000000018e RDI: 0000200000021d00 RBP: 00007fc799c0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fc799da6080 R15: 00007ffcf10a19c8